UNITED
STATES
ENVIRONMENTAL
PROTECTION
AGENCY
WASHINGTON,
D.
C.
20460
OFFICE
OF
PREVENTION,
PESTICIDES
AND
TOXIC
SUBSTANCES
PC
Codes:
029801,
029802,
029806,
128931,
128944,
129043
DP
Barcode:
317696
August
31,
2005
MEMORANDUM
Subject:
EFED
Reregistration
Chapter
For
Dicamba/
Dicamba
Salts
To:
Susan
Lewis,
Branch
Chief
Reregistration
Branch
1
Special
Review
and
Reregistration
Division
From:
William
Erickson,
Biologist
Ibrahim
Abdel­
Saheb,
Environmental
Scientist
Shannon
Borges,
Biologist
Environmental
Risk
Branch
2,
Environmental
Fate
and
Effects
Division
Through:
Thomas
Bailey,
Branch
Chief,
Environmental
Risk
Branch
2,
Environmental
Fate
and
Effects
Division
EFED
has
completed
a
screening­
level
ecological
risk
assessment
for
the
proposed
reregistration
of
dicamba
and
its
salts.
Dicamba
is
a
benzoic
acid
herbicide
formulated
for
use
in
agricultural
and
residential
settings.
Its
major
use
is
weed
control
in
corn,
with
other
major
use
sites
including
wheat,
barley,
pastures,
and
lawn
and
turf.
The
risk
assessment
is
based
on
toxicity
and
environmental
fate
studies
submitted
to
support
the
registration
of
dicamba
and
its
salts
and
on
ecological
modeling
to
estimate
environmental
concentrations.
EFED's
risk
conclusions
are
summarized
below.

°
listed
and
non­
listed
terrestrial
plants
are
at
risk
from
runoff
and
drift
from
all
use
sites
°
risk
exists
to
non­
vascular
aquatic
plants
but
is
minimal
for
listed
and
non­
listed
vascular
aquatic
plants
°
acute
risk
exists
to
listed
and
non­
listed
birds
°
acute
risk
exists
to
small,
listed
mammals
exposed
to
maximum
residues
from
application
to
sugarcane
°
chronic
risk
exists
for
listed
and
non­
listed
mammals
°
minimal
risk
is
expected
to
listed
and
non­
listed
vascular
aquatic
plants
°
no
adverse
effects
are
expected
for
listed
and
non­
listed
freshwater
and
estuarine
fish
and
aquatic
invertebrates
The
following
data
gaps
have
been
identified
(
see
Appendix
E
for
further
details):

°
seedling
emergence
and
vegetative
vigor
studies
(
123­
1a,
b);
dicamba
acid,
TEP
°
seedling
emergence
and
vegetative
vigor
studies
(
123­
1a,
b);
dimethylamine
salt,
TEP
°
seedling
emergence
and
vegetative
vigor
studies
(
123­
1a,
b);
diglycoamine
salt,
TEP
°
seedling
emergence
and
vegetative
vigor
studies
(
123­
1a,
b);
isopropylamine
salt,
TEP
°
seedling
emergence
and
vegetative
vigor
studies
(
123­
1a,
b);
sodium
salt,
TEP
°
seedling
emergence
and
vegetative
vigor
studies
(
123­
1a,
b);
potassium
salt,
TEP
Note:
These
seedling
emergence
and
vegetative
vigor
tests
can
each
be
limited
to
the
five
most
sensitive
species
determined
in
previous
testing
with
the
technical
grade
of
dicamba
acid
(
MRID
no.
42846301).
Those
species
are
soybean,
onion,
turnip,
tomato,
and
lettuce.

EFED
plans
on
conducting
further
refinements
to
this
assessment
after
registrant
comments
have
been
received.
These
refinements
include
the
following:

°
An
AgDrift
analysis
will
be
completed.
°
An
assessment
of
exposure
and
risk
from
granular
formulations
will
be
conducted.
°
RQs
for
listed
terrestrial
plants
will
be
recalculated.
°
Available
incident
data
will
be
more
fully
evaluated.
°
ECOTOX
literature
references
will
be
examined
for
relevant
information.
Environmental
Fate
and
Ecological
Risk
Assessment
for
the
Reregistration
of
Dicamba
and
Dicamba
Sodium,
Potassium,
Diglycoamine,
Dimethylamine
and
Isopropylamine
Salts
United
States
Environmental
Protection
Agency
Office
of
Pesticide
Programs
Environmental
Fate
and
Effects
Division
Ariel
Rios
Building
1200
Pennsylvania
Ave.,
NW
Mail
Code
7507C
Washington,
DC
20460
Reviewed
and
Approved
by:

Thomas
Bailey,
Branch
Chief
W.
Erickson,
Biologist
I.
Abdel­
Saheb,
Agronomist
S.
Borges,
Biologist
Environmental
Risk
Branch
2
1
TABLE
OF
CONTENTS
I.
Executive
Summary
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3
A.
Nature
of
Chemical
Stressor
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3
B.
Potential
Risks
to
Non­
target
Organisms
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3
C.
Conclusions
­
Exposure
Characterization
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6
D.
Conclusions
­
Effects
Characterization
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7
E.
Uncertainties
and
Data
Gaps
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8
II.
PROBLEM
FORMULATION
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8
A.
Stressor
Source
and
Distribution
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9
1.
Source
and
Intensity:
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9
2.
Physical/
Chemical/
Fate
and
Transport
Properties:
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.
13
3.
Pesticide
Type,
Class,
Mode
of
Action
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15
4.
Overview
of
Pesticide
Usage
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16
B.
Receptors
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.
24
1.
Ecological
Effects:
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24
2.
Ecosystems
at
Risk:
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28
C.
Assessment
Endpoints
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28
D.
Conceptual
Model
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29
1.
Risk
Hypothesis:
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29
2.
Diagram:
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30
E.
Analysis
Plan
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32
1.
Preliminary
Identification
of
Data
Gaps
and
Methods:
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32
2.
Measures
to
Evaluate
Risk
Hypotheses
and
Conceptual
Model
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33
III.
ANALYSIS
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36
A.
Use
Characterization
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36
B.
Exposure
Characterization
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37
1.
Environmental
Fate
and
Transport
Characterization
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37
2.
Measures
of
Aquatic
Exposure
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41
3.
Measures
of
Terrestrial
Exposure
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42
C.
Ecological
Effects
Characterization
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43
1.
Aquatic
Effects
Characterization
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43
2.
Terrestrial
Effects
Characterization
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48
IV.
RISK
CHARACTERIZATION
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55
A.
Risk
Estimation
­
Integration
of
Exposure
and
Effects
Data
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55
1.
Non­
target
Aquatic
Animals
and
Plants
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57
2.
Non­
target
Terrestrial
Animals
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58
3.
Non­
target
Terrestrial
and
Semi­
aquatic
Plants
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63
B.
Risk
Description
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65
1.
Risks
to
Aquatic
Organisms
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65
2.
Risks
to
Terrestrial
Organisms:
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66
3.
Review
of
Incident
Data:
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70
4.
Federally
Listed
Species
Concerns
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70
5.
Endocrine
Disrupter
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.
.
.
77
2
TABLE
OF
CONTENTS
(
cont.)

C.
Description
of
Assumptions,
Limitations,
Uncertainties,
Strengths
and
Data
Gaps
.
.
.
.
78
References
.
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80
Appendix
A:
Environmental
Fate
Studies,
Chemical
Structures
and
Some
Properties
of
Dicamba
Salts
and
DCSA
.
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81
Appendix
B:
Aquatic
Exposure
Model
Results
.
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89
Appendix
C:
Terrestrial
Bird
and
Mammal
Model
Results
.
.
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182
Appendix
D:
TerrPlant
and
AgDrift
Model
and
Results
.
.
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188
Appendix
E:
Data
Requirements
.
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197
Appendix
F:
Ecological
Effects
Summaries
.
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203
3
I.
EXECUTIVE
SUMMARY
A.
Nature
of
Chemical
Stressor
Dicamba
was
first
registered
in
the
United
States
in
1967
and
is
widely
used
in
agricultural,
industrial
and
residential
settings.
Dicamba
is
used
as
an
ingredient
in
agricultural
and
home
use
products,
as
a
sole
active
ingredient
and
in
conjunction
with
other
active
ingredients.
Dicamba
is
a
benzoic
acid
herbicide
similar
in
structure
and
mode
of
action
to
phenoxy
herbicides.
Typical
terrestrial
application
methods
consist
of
ground
and
aerial
spray
to
the
leaves
or
to
the
soil.
Dicamba
controls
annual,
biennial
and
perennial
broadleaf
weeds
in
crops
and
grasslands,
and
it
is
used
to
control
brush
and
bracken
in
pastures.
In
combination
with
a
phenoxyalkanoic
acid
or
other
herbicide,
dicamba
is
used
in
pastures,
rangeland,
and
non­
crop
areas
such
as
fence­
rows
and
roadways
to
control
weeds.
Dicamba
is
absorbed
by
leaves
and
roots,
and
moves
throughout
the
plant
acting
at
multiple
sites
to
disrupt
hormone
(
auxin)
balance
and
protein
synthesis,
resulting
in
plant
growth
abnormalities.
Dicamba
is
formulated
primarily
as
a
salt
in
an
aqueous
solution.
Supported
forms
are;
dicamba
acid
(
29801),
dicamba
dimethylamine
salt
­
DMA
(
29802),
dicamba
sodium
salt
(
29806),
dicamba
diglycoamine
salt
­
DGA
(
128931),
dicamba
isopropylamine
salt
(
128944)
and
dicamba
potassium
salt
(
129043).

B.
Potential
Risks
to
Non­
target
Organisms
For
this
screening
risk
assessment,
the
potential
exposure
of
dicamba
and
its
salts
to
aquatic
and
terrestrial
endpoints
was
modeled.
The
Tier
II
PRZM(
3.12)/
EXAMS(
2.98)
models
were
used
to
estimate
exposure
concentrations
for
aquatic
animals
and
plants
in
surface
water.
The
potential
levels
of
dicamba
residues
on
various
food
items
for
birds
and
terrestrial
mammals
was
modeled
using
the
T­
REX
1.2.3.
Likewise,
the
TerrPlant
1.0
model
estimated
exposure
to
nontarget
plants.
The
risk
assessment
indicates
risk
to
non­
target
terrestrial
plants
and
freshwater
non­
vascular
plants;
acute
sublethal
risk
to
birds;
chronic
(
developmental/
reproductive)
risk
to
mammals;
and
potential
risks
to
listed
species
(
birds,
small
mammals,
terrestrial
and
semi­
aquatic
monocots
and
dicots)
from
dicamba
use
based
on
the
maximum
application
rates
of
2.8
lbs
ae/
acre
for
sugarcane,
2.0
lbs
ae/
acre
for
hay,
pasture/
rangeland,
soybean
and
turf,
1.0
lbs
ae/
acre
for
wheat
and
0.75
lbs
ae/
acre
for
corn.

The
results
of
this
screening
risk
assessment
indicate
that
dicamba
applied
at
the
maximum
rates
according
to
label
directions
as
a
liquid
spray
for
ground
or
aerial
applications
will
impact
non­
target
plants
for
some
distance
from
the
application
site.
Results
of
Tier
I
and
II
toxicity
studies
with
monocots
and
dicots
indicate
that
seed
germination,
seedling
emergence,
and
vegetative
vigor
are
impacted
by
exposure
to
dicamba.
For
the
modeled
scenarios
at
the
label
maximum
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre,
Acute
Risk
LOCs
for
non­
listed
monocots
and
dicots
located
adjacent
to
treated
areas,
in
semi­
aquatic
areas,
and
as
a
result
of
spray
drift
were
exceeded.
Spray
drift
from
coarse
sprays
would
be
expected
to
damage
non­
target
plants
that
are
closer
to
the
target
site;
whereas,
finer
sprays
have
the
potential
to
travel
greater
distances.
Exposure
will
depend
on
droplet
size,
wind
speed,
and
other
factors.
Highly
active
herbicides,
such
as
the
growth
regulators,
present
the
greatest
drift
hazard
because
small
amounts
can
cause
severe
problems.
Even
if
only
a
small
surface
area
of
the
plant
is
exposed
to
dicamba,
or
a
seedling
is
exposed
to
dicamba
as
it
breaks
through
the
soil
surface,
there
is
a
possibility
that
the
plant
may
be
severely
damaged
or
die
as
a
result.
The
resulting
damage,
even
if
only
minor,
may
be
sufficient
to
prevent
the
plant
from
competing
successfully
with
other
plants
for
resources
and
water.
Currently,
some
labels
for
4
the
registered
dicamba
herbicides
place
restrictions
on
droplet
size,
wind
speed
or
ambient
temperatures
during
application.
These
specific
requirements
are
intended
to
reduce
the
potential
exposure
of
spray
drift
to
susceptible
non­
target
plants.

The
results
of
this
screening
risk
assessment
indicate
that
dicamba
applied
at
the
maximum
rates
according
to
label
directions
as
a
liquid
spray
for
ground
or
aerial
applications
will
impact
freshwater
non­
vascular
plants.
The
non­
listed
Acute
Risk
LOC
for
the
non­
vascular
aquatic
plant
(
blue
green
algae)
was
exceeded;
consequently,
direct
effects
to
growth,
development,
and
reproduction
of
aquatic
non­
vascular
plants
inhabiting
surface
waters
adjacent
to
a
treated
field
may
occur
when
exposed
to
dicamba
as
the
result
of
the
labeled
use
of
the
herbicide.

The
results
of
this
screening
risk
assessment
indicate
that
dicamba
applied
at
the
maximum
rates
according
to
label
directions
as
a
liquid
spray
for
ground
or
aerial
applications
will
impact
avian
species.
The
Acute
Use
and
Acute
Restricted
Use
LOCs
were
exceeded
for
all
weight­
classes
of
birds
(
20,
100,
1000
g)
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for
small
birds
(
20
g)
consuming
fruit,
pods,
seeds,
and
large
insects
at
the
higher
application
rates
(
2.8
and
2.0
lbs
ae/
acre)
and
maximum
predicted
residues.
In
addition,
the
Acute
Use
and
Acute
Restricted
Use
LOCs
were
exceeded
for
20
and
100
g
birds
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for
large
birds
(
1000
g)
consuming
short
grasses
at
the
lower
application
rates
(
1.0
and
0.75
lbs
ae/
acre)
and
maximum
predicted
residues.
For
mean
predicted
residues,
the
Acute
Use
and
Acute
Restricted
Use
LOCs
were
exceeded
for
small
birds
(
20
and
100
g)
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for
large
birds
(
1000
g)
consuming
short
grasses
at
the
higher
application
rates
(
2.8
and
2.0
lbs
ae/
acre).
In
addition
for
mean
predicted
residues,
the
Acute
Use
and/
or
Acute
Restricted
Use
LOCs
were
exceeded
for
20
g
birds
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for100
g
birds
consuming
short
grasses
at
the
lower
application
rates
(
1.0
and
0.75
lbs
ae/
acre).
Consequently,
there
may
be
a
concern
for
potential
indirect
effects
to
listed
species
dependent
upon
birds
for
food,
pollination
or
seed
dispersal,
or
habitat.
Consequently,
based
on
these
results,
birds
may
be
subject
to
sublethal
effects
and
indirect
effects
on
foraging
behavior
when
acutely
exposed
to
dicamba
as
a
result
of
the
labeled
use
of
the
herbicide.

Assuming
maximum
residue
levels
at
the
maximum
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre,
Chronic
Risk
LOCs
were
exceeded
for
mammals
consuming
short
grass,
tall
grass
and
broadleaf
forage/
small
insects.
There
were
no
exceedances
of
Chronic
Risk
LOC
for
mammals
consuming
fruit,
seeds,
pods
and
large
insects.
The
risk
assessment
and
calculated
RQs
assume
100%
of
the
diet
is
relegated
to
single
food
types
foraged
only
from
treated
fields.
These
assumptions
may
overestimate
risk,
especially
considering
that
contaminated
food
items
might
be
avoided
for
more
preferred
items
and
diets
would
likely
be
more
variable
over
longer
periods
of
time.
Other
exposure
routes
are
possible
for
animals
residing
in
or
moving
through
treated
areas.
Consumption
of
drinking
water
would
appear
to
be
inconsequential
if
water
concentrations
were
equivalent
to
the
concentrations
from
PRZM/
EXAMS;
however,
concentrations
in
puddled
water
sources
on
treated
fields
may
be
higher
than
concentrations
in
modeled
ponds.
Preening
and
grooming
exposures,
involving
the
oral
ingestion
of
material
from
the
feathers
or
fur
remains
an
unquantified,
but
potentially
important,
exposure
route.
Consequently;
based
on
these
results,
mammals
may
be
subject
to
5
developmental/
reproductive
effects
and
direct
effects
on
foraging
behavior
when
chronically
exposed
to
dicamba
as
a
result
of
the
labeled
use
of
the
herbicide.

Exposure
to
dicamba
results
in
direct
effects
to
plant
species
that
could
result
in
indirect
effects
at
the
higher
levels
of
organization
(
i.
e.
population,
trophic
level,
community,
ecosystem).
The
guideline
terrestrial
plant
studies
indicate
direct
adverse
effects
to
seedling
emergence
and
vegetative
vigor,
as
well
as
non­
lethal
effects
including
brown
leaf
tips,
necrosis,
chlorosis,
stem
tumors,
leaf
curl,
and
decrease
in
size.
In
terrestrial
and
shallowwater
aquatic
communities,
plants
are
the
primary
producers
upon
which
the
succeeding
trophic
levels
depend.
If
the
available
plant
material
is
impacted
due
to
the
effects
of
dicamba,
this
may
have
negative
effects
not
only
on
the
herbivores,
but
throughout
the
food
chain.
Also,
depending
on
the
severity
of
impacts
to
the
plant
communities
(
edge
and
riparian
vegetation),
community
assemblages
and
ecosystem
stability
may
be
altered
(
i.
e.
reduced
bird
populations
in
edge
habitats;
reduced
riparian
vegetation
resulting
in
increased
light
penetration
and
temperature
in
aquatic
habitats).
In
addition,
allochthonous
input
from
riparian
vegetation
is
not
only
a
significant
component
of
the
food
supply
for
aquatic
herbivores
and
detritivores
but
also
provides
habitat
(
i.
e.
leaf
packs,
materials
for
casebuilding
for
invertebrates).

The
screening
risk
assessment
for
listed
species
indicates
potential
risk
to
the
following
taxonomic
groups
for
the
dicamba
use
scenarios
as
specified
below:

°
small
birds
(
20g)
feeding
on
short
grasses,
tall
grasses,
broadleaf
forage/
small
insects,
and
fruit/
pods/
seeds/
large
insects
at
all
application
rates
°
small
birds
(
100
g)
feeding
on
short
grasses,
tall
grasses,
and
broadleaf
forage/
small
insects
at
0.75
and
1.0
lbs
ae/
acre
°
small
birds
(
100
g)
feeding
on
short
grasses,
tall
grasses,
broadleaf
forage/
small
insects,
and
fruit/
pods/
seeds/
large
insects
at
2.8
and
2.0
lbs
ae/
acre
°
large
birds
(
1000
g)
feeding
on
short
grasses,
tall
grasses,
and
broadleaf
forage/
small
insects
at
all
application
rates
°
small
(
15
g)
mammals
feeding
on
short
grasses
at
2.8
lbs
ae/
acre
°
non­
target
terrestrial
plants
­
monocots
and
dicots
adjacent
to
treated
areas
and
in
semiaquatic
areas
at
all
application
rates
(
all
uses
modeled)
by
ground
and
aerial
spray
application.

Although
exceedances
occurred
with
comparisons
of
RQs
calculated
from
mean
Kenaga
EECs
to
listed
species
LOCs,
screening
level
risk
assessments
rely
on
maximum
residues.
Mean
Kenaga
EECs
may
be
considered
more
closely
in
future
refined
risk
assessments.

Since
the
Listed
Species
LOCs
for
birds,
small
mammals,
and
terrestrial
monocots
and
dicots
are
exceeded
for
the
use
of
dicamba,
the
LOCATES
was
run
for
all
taxonomic
groups.
For
terrestrial
monocots
and
dicots,
both
the
Acute
Risk
LOCs
for
non­
listed
species
and
the
Listed
Species
LOCs
were
exceeded;
consequently
a
potential
concern
arises
for
species
with
both
narrow
(
i.
e.,
species
that
are
obligates
or
have
very
specific
habitat
or
feeding
requirements)
and
general
dependencies
(
i.
e.,
cover
type
requirements).
Information
from
LOCATES
indicates
that
for
the
corn,
wheat,
sugarcane
and
pasture/
grazing
uses,
several
potentially
affected
species
of
birds,
mammals,
reptiles
and
plants
appear
to
be
co­
located
with
pesticide
use
areas.
Consequently,
there
may
be
a
concern
for
potential
indirect
effects
to
6
listed
species
dependent
upon
birds
that
consume
feed
items
(
short
and
tall
grasses;
broadleaf
plants;
small
and/
or
large
insects;
and
fruits,
seeds,
and
pods)
contaminated
with
dicamba
residues;
such
as
predatory
birds
and
mammals.
In
addition,
there
may
be
a
potential
concern
for
indirect
effects
related
to
plants
that
require
birds
and/
or
mammals
for
pollination
or
seed
dispersal
and
for
animals
that
use
burrows
for
shelter
or
breeding
habitat.

This
screening
risk
assessment
indicates
that
there
are
no
acute
risks
to
fish,
aquatic
invertebrates,
aquatic
vascular
plants
and
mammals
at
maximum
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre.
In
addition,
there
are
no
chronic
risks
to
birds
at
the
maximum
application
rates.
Consequently,
fish,
aquatic
invertebrates
and
aquatic
vascular
plants
inhabiting
surface
waters
adjacent
to
a
dicamba
treated
field
would
not
be
at
risk
for
adverse
acute
effects
on
reproduction,
growth
and
survival
when
exposed
to
residues
in
surface
runoff
and
spray
drift
as
a
result
of
ground
and/
or
aerial
spray
application.
Likewise,
acute
risks
to
mammals
and
chronic
risks
to
birds
consuming
food
types
containing
dicamba
residues
are
not
expected
from
the
labeled
uses
of
the
herbicide.
EFED
currently
does
not
quantify
risks
to
terrestrial
non­
target
insects.

C.
Conclusions
­
Exposure
Characterization
EFED
established
a
strategy
for
bridging
the
environmental
fate
data
requirements
for
the
dicamba
sodium
and
potassium
salts,
dimethylamine
salt
(
DMA),
isopropylamine
salt
and
diglycoamine
salt
(
DGA)
to
the
dicamba
acid.
Bridging
data
were
submitted
indicating
that
the
dicamba
salts
will
be
rapidly
converted
to
the
free
acid
of
dicamba.
A
laboratory
dissociation
study
showed
that
each
dicamba
salt
(
tested
at
>
99%
purity)
completely
dissociated
to
dicamba
acid
within
75
seconds
in
pure
water.
EFED
determined
that
fate
studies
conducted
with
dicamba
acid
provide
"
surrogate
data"
for
the
dicamba
salts.
However,
there
is
uncertainty
regarding
the
fate
of
formulated
typical
end
use
products
(
TEPs)
containing
the
dicamba
salts
in
the
environment.
The
influence
of
inert
ingredients
and
additives,
in
formulated
TEPs,
on
the
degradation
potential
are
unknown.

Based
on
the
physical
and
chemical
properties
as
well
as
the
laboratory
fate
studies,
dicamba
acid
is
very
soluble
(
6100
mg/
L)
and
very
mobile
in
laboratory
soil
studies
thus
it
is
expected
to
mobile
in
environmental
settings.
Aerobic
soil
metabolism
is
the
main
degradative
process
for
dicamba
acid.
A
single
observed
half­
life
for
dicamba
acid
was
six
days,
with
formation
of
the
intermediate
non­
persistent
degradate
3,6­
dichlorosalicylic
acid
(
DCSA).
DCSA
degraded
at
approximately
the
same
rate
as
dicamba
with
the
final
metabolites
being
carbon
dioxide
and
microbial
biomass.
Dicamba
is
stable
to
abiotic
hydrolysis
at
all
pH's
and
photodegrades
slowly
in
water
and
on
soil.
Dicamba
is
more
persistent
under
anaerobic
soil:
water
systems
in
the
laboratory,
with
a
half­
life
of
141
days.
The
major
degradate
under
anaerobic
conditions
was
DCSA,
which
was
persistent,
comprising
>
60%
of
the
applied
after
365
days
of
anaerobic
incubation.
There
are
no
acceptable
data
for
the
aerobic
aquatic
metabolism
of
dicamba;
supplemental
information
indicates
that
dicamba
degrades
more
rapidly
in
aquatic
systems
when
sediment
is
present.
Dicamba
is
not
expected
to
bioaccumulate
in
aquatic
organisms
because
it
is
an
anion
at
environmental
pHs
(
pKa
=
1.9).

Routes
of
exposure
evaluated
in
this
screening
risk
assessment
focused
on
deposition,
runoff
and
spray
drift
from
ground
and
aerial
spray
applications
of
dicamba.
The
dicamba
exposure
characterization
combined
the
environmental
fate
data
with
Tier
II
exposure
models
to
estimate
environmental
exposure
concentrations
(
EECs).
EECs
for
aquatic
endpoints
were
7
developed
using
the
Tier
II
surface
water
models
PRZM/
EXAMS.
These
models
are
more
comprehensive
and
determine
EECs
based
on
geographic
areas
nationwide
and
product
use
sites
in
close
proximity
to
water
bodies.
Likewise,
EECs
for
birds
and
terrestrial
mammals
were
estimated
using
the
T­
REX
1.2.3
model
and
EECs
for
non­
target
terrestrial
plants
are
estimated
by
the
TerrPlant
1.0
model.
A
review
of
ground
water
and
surface
water
monitoring
data
indicate
historical
detections
of
dicamba
at
low
concentrations
(<
1.14
µ
g/
L).
Approximately,
100
incidents
have
been
reported
associated
with
dicamba
usage.
Incidents
reported
include
impacts
to
terrestrial
and
aquatic
non­
target
plants
and
animals.
The
majority
of
reported
incidents
are
damage
to
plants
including
a
wide
range
of
crops
(
corn,
sorghum,
soybeans,
sugar
beets
and
wheat)
as
well
as
impacts
to
non­
crop
plants.
The
specific
impacts
varied
from
browning
and
plant
damage
to
mortality
of
all
plants
within
the
treated
area.
Aquatic
impacts
reported
consist
of
three
fish
kill
incidents
associated
with
pasture
and
residential
turf
application.

D.
Conclusions
­
Effects
Characterization
Spray
drift
and
runoff
to
adjacent
bodies
of
water
are
the
most
likely
sources
of
dicamba
and
dicamba
salts
exposure
to
nontarget
aquatic
organisms.
Available
acute
toxicity
data
indicate
that
dicamba
acid
appears
to
be
slightly
toxic
to
freshwater
fishes
(
rainbow
trout
and
bluegill
sunfish)
and
the
sodium
salt
of
dicamba
is
slightly
toxic
to
daphnids.
No
toxicity
studies
have
been
conducted
to
determine
potential
chronic
effects
to
fish
and
aquatic
invertebrates.
Toxicity
studies
with
non­
vascular
aquatic
plants
exposed
to
dicamba
acid
indicate
that
cell
densities
were
significantly
reduced
in
blue­
green
algae.
However,
aquatic
vascular
plant
species
were
not
sensitive
to
dicamba
acid.
Data
are
currently
unavailable
to
determine
potential
impacts
to
sediment­
dwelling
benthic
organisms
and
to
riparian
habitats.

Ground
deposition
and
spray
drift
with
resulting
residues
on
foliage
and
on
insects
and
seeds
are
the
most
likely
sources
of
dicamba
exposure
to
nontarget
terrestrial
birds
and
mammals,
including
listed
species.
In
addition,
uptake
in
plant
roots
could
occur
through
ground
spray
application.
Available
acute
toxicity
data
indicate
that
the
s
dicamba
salts
are
practically
nontoxic
to
bobwhite
quail
and
mallard
ducklings
in
the
diet;
however,
oral
gavage
studies
indicate
that
dicamba
acid
was
moderately
toxic
to
bobwhite
quail
and
slightly
toxic
to
mallard
ducks.
In
chronic
studies
with
dicamba
acid,
a
reduction
in
hatchability
was
observed
in
mallard
ducks.
No
treatment­
related
mortality,
signs
of
toxicity,
or
effects
on
reproduction
were
observed
in
bobwhite
quail.
Dicamba
acid
is
classified
as
practically
non­
toxic
to
small
mammals
on
an
acute
oral
basis.
In
a
2­
generation
rat
reproduction
study,
maternal
neurotoxicity
was
observed
as
well
as
decreased
pup
growth.
Developmental
studies
with
rabbits
reported
irregular
ossification
of
internasal
bones
and
maternal
toxicity.
Mortality,
clinical
signs
of
toxicity,
body
weight
changes,
and
decreased
food
consumption,
was
also
observed
in
rats.
In
addition,
sublethal
effects
were
reported
in
subchronic
feeding
studies.
The
reproductive
and
developmental
effects
observed
in
these
studies
may
lead
to
a
potential
concern
for
impacts
to
populations
of
mammals
consuming
feed
items
contaminated
with
dicamba
and
to
the
predators
that
feed
on
them.
Since,
dicamba
is
classified
as
practically
non­
toxic
to
bees
on
a
contact
exposure
basis
(
LD
50
>
90.65
µ
g/
bee);
the
potential
for
dicamba
to
have
adverse
effects
on
pollinators
and
other
beneficial
insects
is
low.
Therefore,
the
label
does
not
need
a
warning
for
honey
bees.

Terrestrial
plant
toxicity
studies
indicate
that
dicamba
acid
negatively
impacts
seed
germination
(
radicle
length;
soybean
EC
25
=
0.036
lb
ai/
A),
seedling
emergence
(
shoot
length;
8
soybean
EC
25
=
0.0027
lb
ai/
A),
and
vegetative
vigor
(
shoot
length;
soybean
EC
25
=
0.0068
lb
ai/
A
)
in
monocots
and
dicots.
The
most
sensitive
monocot
tested
was
onion
(
EC
25
=
0.071
lb
ai/
A
­
seed
germination;
EC
25
=
0.0044
lb
ai/
A
­
seedling
emergence;
and
EC
25
=
0.1507
lb
ai/
A
­
vegetative
vigor).
Non­
lethal
effects
included
brown
leaf
tips,
necrosis,
decrease
in
size,
leaf
curling,
chlorosis,
and
stem
tumors.
Consequently,
spray
drift
presents
a
potential
risk
to
non­
target
plants
inhabiting
edge
habitats
adjacent
to
target
fields
and
riparian
vegetation
along
streams
and/
or
ponds
in
close
proximity
to
sprayed
fields.

E.
Uncertainties
and
Data
Gaps
There
are
a
number
of
areas
of
uncertainty
in
the
terrestrial
and
the
aquatic
organism
risk
assessments
that
could
potentially
cause
an
underestimation
of
risk.
First,
this
assessment
accounts
only
for
exposure
of
non­
target
organisms
to
dicamba,
but
not
to
its
degradates.
The
risks
presented
in
this
assessment
could
be
underestimated
if
degradates
also
exhibit
toxicity
under
the
conditions
of
use
proposed
on
the
label.
Data
are
not
available
concerning
the
fate
and
toxicity
of
the
degradation
products
of
dicamba.
Second,
the
risk
assessment
only
considers
the
most
sensitive
species
tested
and
only
considers
a
subset
of
possible
use
scenarios.
For
the
aquatic
organism
risk
assessment,
there
are
uncertainties
associated
with
the
PRZM/
EXAMS
model,
input
values,
and
scenarios
including
the
use
of
surrogate
scenarios,
however
these
uncertainties
cannot
be
quantified.
The
potential
impacts
of
these
uncertainties
are
outlined
in
the
Aquatic
Exposure
and
Risk
Assessment
and
the
Terrestrial
Exposure
and
Risk
Assessment
sections
of
this
document.

There
is
uncertainty
in
the
environmental
fate
of
the
typical
end
use
products
(
TEPs)
which
contain
the
sodium,
DMA
or
DGA
salts.
Dissociation
rates,
adsorption/
desorption
rates
and
field
dissipation
information
are
needed
for
TEPs
to
determine
the
persistence
and
mobility
of
the
salts
and
their
associated
inert
ingredients
found
in
the
TEPs.

Additional
uncertainty
results
from
lack
of
information
in
components
of
this
ecological
risk
assessment.
For
example,
actual
residue
levels
in
foliage,
insects,
and
seeds
are
not
available
to
accurately
predict
risks
to
terrestrial
organisms
(
birds,
mammals,
pollinators)
which
may
contact
dicamba
residues
after
application.
Therefore,
model
estimates
are
used
in
risk
quotient
calculations.
Additionally,
little
field
information
is
not
available
to
help
characterize
risks.
An
AgDrift
analysis
also
will
be
completed
in
further
refinements
to
the
chapter.

II.
PROBLEM
FORMULATION
The
purpose
of
the
ecological
risk
assessment
(
ERA)
is
to
assist
the
Agency
in
evaluating
the
actions
needed,
if
any,
to
address
ecological
risks
associated
with
the
reregistration
of
the
herbicide
dicamba
(
3,6­
Dichloro­
o­
anisic
acid).
Dicamba
is
formulated
in
aqueous
solutions
as
a
salt
and
has
herbicidal
activity
against
annual,
biennial
and
perennial
broadleaf
weed
species
and
other
plants
in
terrestrial
settings.

A.
Stressor
Source
and
Distribution
1.
Source
and
Intensity:
Dicamba
is
a
benzoic
acid
herbicide
similar
in
structure
and
mode
of
action
to
phenoxy
herbicides.
Typical
terrestrial
application
methods
consist
of
ground
and
aerial
spray
to
the
leaves
or
to
the
soil.
Dicamba
controls
annual,
biennial
and
perennial
broadleaf
weeds
in
grain
crops
and
grasslands,
and
it
is
used
to
control
brush
and
bracken
in
9
pastures.
In
combination
with
a
phenoxyalkanoic
acid
or
other
herbicide,
dicamba
is
used
in
pastures,
range
land,
and
non­
crop
areas
such
as
fence­
rows
and
roadways
to
control
weeds.
Dicamba
is
absorbed
by
leaves
and
roots,
and
moves
throughout
the
plant
where
it
inhibits
plant
growth.

Dicamba
comes
in
multiple
formulations
and
is
found
in
numerous
end
use
products
intended
for
use
in
a
wide
range
of
terrestrial
use
patterns.
Aqueous
formulations
are
registered
and
methods
of
application
include
controlled
droplet
applicator,
high
volume
ground
sprayer,
low
volume
ground
sprayer,
hand
held
sprayer,
aerial
and
ground
broadcast,
high
volume
spray
(
dilute),
low
volume
spray
(
concentrate),
and
spot
treatment.
Timing
of
application
includes
dormant,
early
fall,
early
spring,
fall,
late
spring
(
postemergence),
spring,
and
summer.
Table
II.
a.
presents
a
summary
of
dicamba
use
sites.

Dicamba
is
an
ingredient
in
several
agricultural
and
home
use
products,
as
a
sole
active
ingredient
and
in
conjunction
with
other
active
ingredients.
Dicamba
is
formulated
primarily
as
a
salt
in
an
aqueous
solution.
Supported
forms
are;
dicamba
acid
(
29801),
dicamba
dimethylamine
salt
­
DMA
(
29802),
dicamba
sodium
salt
(
29806),
dicamba
diglycoamine
salt
­
DGA
(
128931),
dicamba
isopropylamine
salt
(
128944)
and
dicamba
potassium
salt
(
129043).
(
See
appendix
A
for
chemical
structures
and
properties
of
the
dicamba
salts.)
Copies
of
all
registered
dicamba
labels
may
be
found
at;
http://
oaspub.
epa.
gov/
pestlabl/
ppls.
home
10
Table
II.
a.
Overview
of
Dicamba
Uses
Representative
Crops
Use
Grouping
Dicamba
Acid
Sodium
Salt
Potassium
Salt
Diglycoamine
Salt
Dimethylamine
Salt
Isopropylamine
Salt
Terrestrial
food
crop
Agricultural/
farm
premises,

Asparagus
Agricultural/
farm
premises,

Asparagus
Asparagus
Agricultural/
farm
premises,
Asparagus,

Proso
millet
Agricultural/
farm
premises,
Asparagus,

Corn
Terrestrial
food
and
feed
crop
Agricultural
crops/
soils,

Agricultural
fallow/
idleland,

Barley,
Corn
(
unspecified),

Corn
(
field)
Corn
(
pop),

Cotton,
Proso
Millet,
Oats,

Small
grains,
Sorghum,,

Soybeans,
Sugarcane,
Wheat
Agricultural
crops/
soils,

Agricultural
fallow/

idleland,
Barley,
Corn
(
unspecified),
Corn
(
field)

Corn
(
pop),
Cotton,
Proso
Millet,
Oats,
Sorghum,

Sorghum,
Soybeans,

Sugarcane,
Wheat
Agricultural
fallow/
idleland,
Barley,

Corn
(
unspecified),

Corn,
field,
Corn
(
pop),

Proso
Millet,
Oats,

Sorghum,
Soybeans,

Sugarcane,
Wheat
Agricultural
fallow/
idleland,

Barley,
Corn
(
unspecified),
Corn
(
field),
Corn
(
pop),

Cotton,
Oats,

Sorghum,
Soybeans,

Sugarcane,
Triticale,

Wheat
Agricultural
crops/
soils,
Agricultural
fallow/
idleland,

Barley,
Corn
(
unspecified),
Corn
(
field),
Corn
(
pop),

Proso
Millet,
Oats,

Small
grains,

Sorghum,
Soybeans
Sugarcane,
Wheat
Agricultural
fallow/
idleland,

Barley,
Oats,

Sorghum,
Wheat
Terrestrial
feed
crop
Grass
forage/
fodder/
hay,

Millet
(
foxtail),
Pastures,

Rangeland
Grass
forage/
fodder/
hay,

Grasses
grown
for
seed,

Pastures,
Rangeland
Corn,
Grass
forage/
fodder/
hay
Corn,
Grass
forage/
fodder/
hay,

Grasses
grown
for
seed,
Pastures,

Rangeland
Barley,
Corn,
Grass
forage/
fodder/
hay,

Grasses
grown
for
seed,
Proso
Millet,

Oats,
Pastures,

Rangeland,
Rye,

Sorghum,
Sudangrass,

Wheat
Representative
Crops
Use
Grouping
Dicamba
Acid
Sodium
Salt
Potassium
Salt
Diglycoamine
Salt
Dimethylamine
Salt
Isopropylamine
Salt
11
Terrestrial
non­
food
crop
Airports/
landing
fields,

Commercial/
industrial
lawns,

Commercial/
institutional/
ind
ustrial
premises/
equipment
(
outdoor),
Golf
course
turf,

Industrial
areas
(
outdoor),

Nonagricultural
rights­
of­
way/
fencerows/
hedg
erows,
Nonagricultural
uncultivated
areas/
soils,

Ornamental
sod
farm
(
turf),

Recreation
area
lawns,

Recreational
areas
Grasses
grown
for
seed,

Industrial
areas
(
outdoor),

Nonagricultural
rights­
of­
way/
fencerows/
he
dgerows,
Ornamental
lawns
and
turf
Golf
course
turf,

Industrial
areas
(
outdoor),
Nonagricultural
rights­
of­
way/

fencerows/
hedgerows,

Nonagricultural
uncultivated
areas/
soils,
Ornamental
lawns
and
turf,
Ornamental
sod
farm
(
turf),
Recreation
area
lawns,
Recreational
areas
Agricultural
fallow/
idleland
Agricultural
rights­
of­
way/

fencerows/
hedgerows,

Agricultural
uncultivated
areas,

Agricultural/
farm
structures/
buildings
and
equipment,

Airports/
landing
fields,
Commercial/

industrial
lawns,

Commercial/

institutional/
industrial
premises/
equipment
(
outdoor),
Fencerows
/
hedgerows,
Golf
course
turf,
Grasses
grown
for
seed,

Industrial
areas
(
outdoor),
Nonagricultural
outdoor
buildings/

structures,
Nonagricultural
rights­
of­
way/
fencero
ws/
hedgerows,
Nonagricultural
uncultivated
areas/
soils,
Ornamental
lawns
and
turf,
Ornamental
sod
farm
(
turf),

Paths/
patios,
Paved
Representative
Crops
Use
Grouping
Dicamba
Acid
Sodium
Salt
Potassium
Salt
Diglycoamine
Salt
Dimethylamine
Salt
Isopropylamine
Salt
12
Terrestrial
non­
food
and
outdoor
residential
Nonagricultural
rights­
of­
way/
fencerows/

hedgerows,
Ornamental
and/
or
shade
trees,

Ornamental
lawns
and
turf,

Ornamental
woody
shrubs
and
vines,
Urban
areas
Nonagricultural
rights­
of­
way/
fencerows/

hedgerows
,
Ornamental
lawns
and
turf
Nonagricultural
rights­
of­
way/

fencerows/
hedgerows,
Ornamental
lawns
and
turf
Fencerows/
hedgerows
Nonagricultural
rights­
of­
way/

fencerows/
hedgerows,
Ornamental
lawns
and
turf,
Urban
areas
Outdoor
residential
Household/
domestic
dwellings
outdoor
premises,

Residential
lawns
Household/
domestic
dwellings
outdoor
premises,
Ornamental
lawns
and
turf,

Residential
lawns
Aquatic
non­
food
industrial
Drainage
systems
Drainage
systems
Forestry
Forest
trees
(
all)
Forest
trees
(
all)
Forest
plantings
(
reforestation
programs,
tree
farms,

tree
plantations,
etc.),

Forest
trees
(
all)
13
2.
Physical/
Chemical/
Fate
and
Transport
Properties:
A
summary
of
selected
physical
and
chemical
properties
for
dicamba
acid
are
presented
in
Table
II.
b.

EFED
established
a
strategy
for
bridging
the
environmental
fate
data
requirements
for
the
dicamba
sodium
and
potassium
salts,
dimethylamine
salt
(
DMA),
isopropylamine
salt
and
diglycoamine
salt
(
DGA)
to
the
dicamba
acid.
Bridging
data
were
submitted
indicating
that
the
dicamba
salts
will
be
rapidly
converted
to
the
free
acid
of
dicamba.
A
laboratory
dissociation
study
showed
that
each
dicamba
salt
(
tested
at
>
99%
purity)
completely
dissociated
to
dicamba
acid
within
75
seconds
in
pure
water
(
MRID
43288001).
EFED
determined
that
fate
studies
conducted
with
dicamba
acid
provide
"
surrogate
data"
for
the
dicamba
salts.

Dicamba
acid
is
very
soluble
(
6100
mg/
L)
and
very
mobile
in
laboratory
soil
studies.
In
batch
equilibrium
experiments,
dicamba
acid
was
determined
to
be
very
mobile
in
loam,
clay
loam,
silt
loam,
and
sandy
loam
soils
and
a
loam
sediment,
with
Freundlich
K
d
values
of
0.16,
0.10,
0.53.
0.07
and
0.21,
respectively.
Corresponding
K
oc
values
were
7.27,
3.45,
21.1,
17.5
and
17.5,
respectively.

Aerobic
soil
metabolism
is
the
main
degradative
process
for
dicamba
acid.
A
single
observed
half­
life
for
dicamba
acid
was
six
days,
with
formation
of
the
intermediate
non­
persistent
degradate
3,6­
dichlorosalicylic
acid
(
DCSA).
DCSA
degraded
at
approximately
the
same
rate
as
dicamba
with
the
final
metabolites
being
carbon
dioxide
and
microbial
biomass.
Aerobic
degradation
of
dicamba
is
slower
at
lower
temperatures
and
low
soil
moisture
and
rainfall.
Dicamba
is
stable
to
abiotic
hydrolysis
at
all
pH's
and
photodegrades
slowly
in
water
and
on
soil.
Dicamba
is
more
persistent
under
anaerobic
soil:
water
systems
in
the
laboratory,
with
a
half­
life
of
141
days.
The
major
degradate
under
anaerobic
conditions
was
DCSA,
which
was
persistent,
comprising
>
60%
of
the
applied
after
365
days
of
anaerobic
incubation.
No
other
anaerobic
degradates
were
present
at
>
10%
during
the
incubation.
There
are
no
acceptable
data
for
the
aerobic
aquatic
metabolism
of
dicamba;
supplemental
information
indicates
that
dicamba
degrades
more
rapidly
in
aquatic
systems
when
sediment
is
present.

Provided
retention
times
of
dicamba
in
aerobic
soils
are
sufficient
and
conditions
are
amenable
to
allow
degradation,
dicamba
can
be
biodegraded
thus
reducing
the
potential
to
leach
to
groundwater.
Biodegradation
in
aerobic
soils
is
reduced
at
lower
temperatures
and
dry
conditions.
If
dicamba
did
reach
anaerobic
soil
or
anaerobic
groundwater
zones,
it
would
be
somewhat
persistent
(
due
to
its
anaerobic
half­
life
of
141
days);
any
DCSA
that
reached
groundwater
would
also
be
expected
to
persist.

Results
from
field
dissipation
studies
conducted
with
the
dimethylamine
salt
of
dicamba,
indicated
that
dicamba
dissipated
with
reviewer
calculated
half­
lifes
ranging
from
4.4
to
19.8
days
with
DCSA
was
the
major
degradate.
Both,
dicamba
and
its
primary
degradate
were
found
at
low
concentrations
(<
20
ppb)
in
soil
segments
deeper
than
10
cm.
Supplementary
data
in
other
field
dissipation
studies
indicate
that
the
sodium
and
diglycoamine
salts
of
14
dicamba
dissipated
similar
to
the
dimethylamine
salt
with
half­
lifes
ranging
from
3
to
12.9
days.

Based
on
the
vapor
pressure
of
3.4e­
5
torr,
when
released
in
the
atmosphere
dicamba
will
exist
in
both
the
vapor
phase
as
well
as
the
adsorbed
to
particulate
phase.
Soil
volatilization
rates
for
potassium
salt
and
DMA
ranged
from
2.91
to
4.97
x
10­
4
µ
g/
cm2/
hr
when
dicamba
was
applied
at
rate
of
0.5
lb
a.
i./
A
(
MRID
41966602).
There
are
numerous
label
restrictions
for
ground
and
aerial
spray
applications.
Spraying
is
not
recommended
if
wind
is
gusty
or
in
excess
of
5
mph
and
moving
in
the
direction
of
adjacent
sensitive
crops.
Recommendations
on
spray
systems
for
coarse
spray
application
are
included
on
the
labels
as
well
as
directions
for
keeping
the
spray
pressure
at
or
below
20
psi
and
spray
volume
at
or
above
20
gpa.
Finally,
dicamba
should
not
be
applied
adjacent
to
sensitive
crops
when
temperature
on
the
day
of
application
is
expected
to
exceed
85
°
C
as
drift
is
more
likely
to
occur.

Dicamba
is
not
expected
to
bioaccumulate
in
aquatic
organisms
because
it
is
an
anion
at
environmental
pHs
(
pKa
=
1.9).

Figure
II.
a.
Chemical
Structure
of
3,6­
Dichloro­
o­
anisic
acid
(
Dicamba)
(
CAS
No.
1918­
00­
9)
15
TABLE
II.
b.
Some
Physical­
Chemical
and
Other
Properties
of
Dicamba
Acid.

CAS
Name
3,6­
dichloro­
2­
methoxybenzoic
acid
IUPAC
Name
3,6­
dichloro­
o­
anisic
acid
CAS
No
1918­
00­
9
PC
Code
029801
Empirical
Formula
C8H6Cl2O3
Molecular
Weight
221.04
Common
Name
Dicamba
Formulated
Product
Banex;
Banlen;
Banval;
Banvel;
Banvel
10G;
Banvel
4E;
Banvel
5G;
Banvel
CST;
Banvel
D;
Banvel
XG;
dianat;
Dicambe;
Dicamba;
Dicamba
;
dicamba
+
2,4­
D;
dicamba
+
atrazine;
dicamba
(
amine);
Clarity;
Marksman;
MDBA;
Mediben;
Velsicol
58­
CS­
11;
Velsicol
compound
''
R''

Pesticide
Type
Herbicide
Chemical
Family
Benzoic
acid
Color/
Form
Colorless
crystals
Odor
Odorless
Melting
Point
114
­
116
°
C
(
Kidd
and
James,
1991))

Flash
Point
199
°
C
(
Gosselin,
1984)

Relative
Density
1.57
g/
ml
at
25
°
C
(
Spectrum
Laboratories:
Chemical
Fact
Sheet)

Water
Solubility
6100
mg/
L
SANDOZE
Safety
Data
Sheet
(
Nov,
1989)
8240
mg/
L
at
25
°
C
(
Toxicology
and
Regulatory
Affairs
Flemington,
NJ)
6500
mg/
L
at
25
°
C
(
Kidd
and
James,
1991)

Solubility
in
other
solvents
Acetone
810
g/
L
at
25
°
C
Dichloromethane
260
g/
L
at
25
°
C
Dioxane
1.18
kg/
L
at
25
°
C
Ethanol
922
g/
L
at
25
°
C
Toluene
130
g/
L
at
25
°
C
Xylene
8
g/
L
at
25
°
C
(
Worthing
1987)

Vapor
Pressure
3.41
E­
05
torr
(
25
°
C)
SANDOZE
Safety
Data
Sheet
(
Nov,
1989)
3.4
E­
05
torr
(
25
°
C)
(
Kidd
and
James,
1991))

Henry's
Law
Constant
1.79
E­
08
(
ARS
Pesticide
Properties
Database)

pKa
1.87
(
MRID
43288001)

Kd(
Freundlich)
Koc
0.07
­
0.53
mL/
g
(
MRID
42774101)
3.45
­
21.1
mL/
g
(
MRID
42774101)

3.
Pesticide
Type,
Class,
Mode
of
Action:
Dicamba
is
a
benzoic
acid
herbicide
similar
in
structure
and
mode
of
action
to
phenoxy
herbicides.
Like
the
phenoxy
herbicides,
dicamba
mimics
auxins,
a
type
of
plant
hormone
and
causes
abnormal
cell
growth
by
affecting
cell
16
division.
Dicamba
acts
systematically
in
plants
after
it
is
absorbed
through
leaves
and
roots.
It
is
easily
transported
throughout
the
plant
and
accumulates
in
new
leaves.

4.
Overview
of
Pesticide
Usage:
Dicamba
was
first
registered
in
the
United
States
in
1967
and
is
widely
used
in
agricultural,
industrial
and
residential
settings.
Dicamba
controls
annual,
biennial
and
perennial
broadleaf
weeds
in
grain
crops
and
grasslands,
and
it
is
used
to
control
brush
and
bracken
in
pastures.
In
combination
with
a
phenoxyalkanoic
acid
or
other
herbicide,
dicamba
is
used
in
pastures,
range
land,
and
non­
crop
areas
such
as
fence­
rows
and
roadways
to
control
weeds.
Dicamba
herbicide
is
available
in
aqueous
formulations
and
is
commonly
mixed
in
tanks
with
other
herbicides
and/
or
fertilizers
before
application.
In
aqueous
forms,
dicamba
is
applied
as
a
pre­
and
post­
emergent
via
aerial
or
ground
spray
for
control
of
most
annual,
biennial
and
perennial
broadleaf
weeds
in
crops.
Dicamba
is
used
to
control
weeds
and
brush
in
pasture,
rangeland
and
noncropland
areas
such
as
utility,
highway
right­
of­
ways
and
non­
irrigation
ditchbanks
including
grazed
or
hayed
areas.
Dicamba
is
also
used
on
residential
turf
and
lawns
as
well
as
golf
courses
for
control
of
weeds
and
other
unwanted
plants.

Dicamba
is
registered
for
use
on
a
variety
of
crops
as
described
in
Table
II.
c.
Figure
II.
b.
presents
an
depiction
of
dicamba
use
on
crops
in
the
United
States.
Based
on
1997
USGS
data,
the
primary
crop
for
dicamba
use
is
corn
(>
6.7
million
lb
ai).
Pasture
(
1.5
million
lb
ai),
wheat
(
807,000
lb
ai),
and
fallowland
(
nearly
800,000
lb
ai)
also
are
major
use
sites,
followed
by
sorghum,
barley,
other
hay,
sugarcane,
and
sod.
17
TABLE
II.
c.
Registered
Uses
of
Dicamba
Use
Sites
Product/
Registration
Number
Forms1
Max
Application
Rate
(
Unit/
Area)
Max
Application
Rate
(
year)

Non­
Food/
Non­
Feed
Uses
Agricultural
Fallow/
Idleland
(

Noncrop
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Agricultural
rights­

ofway
fencerows/
hedgerows
(
Non­
crop)
2
Dicamba
DMA
Salt/
42750­
40
Banvel
845H/
7969­
140
Vanquish/
100­
884
Dimethylamine
Salt,

Sodium
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)

Agricultural
Uncultivated
Areas
(

Noncrop
Banvel
SGF/
7969­
135
Dicamba
DMA
Salt/
42750­
40
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Agricultural/
Farm
Structures/
Buildings
and
Equipment
(
Non­
crop)
Banvel/
7969­
131
Dicamba
DMA
Salt/
42750­
40
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Airports/
Landing
Fields
(
Non­
crop)
Banvel/
7969­
131
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Commercial/
Industrial
Lawns
(

Noncrop
Banvel/
7969­
131
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
1.0
(
lbs
a.
e./
A)
1.0
(
lbs
a.
e./
A)
year
Commercial/
Institutional/
Industrial
Premises/
Equipment
(
Non­
crop)
Banvel/
7969­
131
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Drainage
Systems
(
Non­
crop)
Banvel/
7969­
131
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt,

DGA
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Fencerows/
Hedgerows
(
Non­
crop)
Banvel/
7969­
131
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
TABLE
II.
c.
Registered
Uses
of
Dicamba
Use
Sites
Product/
Registration
Number
Forms1
Max
Application
Rate
(
Unit/
Area)
Max
Application
Rate
(
year)

18
Forest
Plantings
(
reforestation
programs,
tree
farms,
tree
plantations)

(
Non­
crop)
Banvel/
7969­
131
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Forest
Trees
(
Non­
crop)
Banvel/
7969­
131
Vanquish/
100­
884
Dimethylamine
Salt,

DGA
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Golf
Course
Turf
Banvel/
7969­
131
Vanquish/
100­
884
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

DGA
1.0
(
lbs
a.
i./
A)
1.0
(
lbs
a.
e./
A)
year
Household
Domestic
Dwellings
(

Noncrop
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dimethylamine
Salt
1.0
(
lbs
a.
e./
A)
1.0
(
lbs
a.
e./
A)
year
Industrial
Areas
(
Outdoor)

(
Non­
crop)
Banvel/
7969­
131
Vanquish/
100­
884
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt,

DGA
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Nonagricultural
Outdoor
Buildings/
Structures
(
Non­
crop)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Nonagricultural
Rights­

ofway
Fencerows/
Hedgerows
(
Non­
crop)
Banvel/
7969­
131
Banvel
845H/
7969­
140
Vanquish/
100­
884
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt,

Sodium
Salt,
DGA
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Nonagricultural
Uncultivated
Area/
Soils
(
Non­
crop)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Vanquish/
100­
884
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt,

DGA
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
TABLE
II.
c.
Registered
Uses
of
Dicamba
Use
Sites
Product/
Registration
Number
Forms1
Max
Application
Rate
(
Unit/
Area)
Max
Application
Rate
(
year)

19
Ornamental
Lawns
and
Turf
Banvel/
7969­
131
Banvel
845H/
7969­
140
Vanquish/
100­
884
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA
1.0
(
lbs
a.
i./
A)
1.0
(
lbs
a.
i../
A)
year
Ornamental
Sod
Farm
Banvel/
7969­
131
Vanquish/
100­
884
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

DGA
1.0
(
lbs
a.
e./
A)
1.0
(
lbs
a.
e./
A)
year
Paths/
Patios
(
Non­
crop)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dimethylamine
Salt
2.0
(
lbs
a.
e/
A)
2.0
(
lbs
a.
e./
A)
year
Paved
Areas
(
Private
Roads/
Sidewalks
(
Non­
crop)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt
2.0
(
lbs
a.
e/
A)
2.0
(
lbs
a.
e./
A)
year
Recreation
Area
Lawns
Banvel/
7969­
131
Vanquish/
100­
884
Dicamba
DMA
Salt/
42750­
40
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

DGA
1.0
(
lbs
a.
i./
A)
1.0
(
lbs
a.
i./
A)
year
Recreational
Areas
Banvel/
7969­
131
Vanquish/
100­
884
Dicamba
DMA
Salt/
42750­
40
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

DGA
1.0
(
lbs
a.
i./
A)
1.0
(
lbs
a.
i./
A)
year
Residential
Lawns
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
1.0
(
lbs
a.
i./
A)
1.0
(
lbs
a.
i./
A)
year
Urban
Areas
(
Non­
crop)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dicamba
DMA
Salt/
42750­
40
Dimethylamine
Salt
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
TABLE
II.
c.
Registered
Uses
of
Dicamba
Use
Sites
Product/
Registration
Number
Forms1
Max
Application
Rate
(
Unit/
Area)
Max
Application
Rate
(
year)

20
Food/
Feed
Uses
Agricultural
Crops/
Soils
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt
2.0
(
lbs
a.
e/
A)
2.0
(
lbs
a.
e./
A)
year
Agricultural
Fallow/
Idleland
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
All
2.0
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Agricultural/
Farm
Premises
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Vanquish/
100­
884
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

DGA
1.0
(
lbs
a.
e./
A)
1.0
(
lbs
a.
e./
A)
year
Agricultural/
Farm
Structures/
Buildings
and
Equipment
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dicamba
DMA
Salt/
42750­
40
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
1.0
(
lbs
a.
e./
A)
1.0
(
lbs
a.
e./
A)
year
Asparagus
Banvel/
7969­
131
Banvel
845H/
7969­
140
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA
0.5
(
lbs
a.
e./
A)
0.5
(
lbs
a.
e./
A)
year
Barley
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA,

IPA
0.25
(
lbs
a.
e./
A)
0.38
(
lbs
a.
e./
A)
year
TABLE
II.
c.
Registered
Uses
of
Dicamba
Use
Sites
Product/
Registration
Number
Forms1
Max
Application
Rate
(
Unit/
Area)
Max
Application
Rate
(
year)

21
Corn
(
field,
pop,
seed,
silage)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA,

Potassium
Salt
0.5
(
lbs
a.
e./
A)
0.75
(
lbs
a.
e./
A)
year
Hay
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Vanquish/
100­
884
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA
2.03
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
Millet
(
Proso)
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
0.125
(
lbs
a.
e/
A)
0.125
(
lbs
a.
e./
A)
year
Oats
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA
0.125
(
lbs
a.
e/
A)
1.0
(
lbs
a.
e./
A)
year
Pastures2
Banvel/
7969­
131
Banvel
845H/
7969­
140
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Vanquish/
100­
884
Dimethylamine
Salt,

Sodium
Salt,
DGA
2.0
(
lbs
a.
e./
A)

7.7
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
7.7
(
lbs
a.
e./
A)/
year
Rangeland2
Banvel/
7969­
131
Banvel
845H/
7969­
140
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Vanquish/
100­
884
Dimethylamine
Salt,

Sodium
Salt,
DGA
2.0
(
lbs
a.
e./
A)

7.7
(
lbs
a.
e./
A)
2.0
(
lbs
a.
e./
A)
year
7.7
(
lbs
a.
e./
A)/
year
Rye
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
0.5
(
lbs
a.
e./
A)
1.0
(
lbs
a.
e./
A)
year
TABLE
II.
c.
Registered
Uses
of
Dicamba
Use
Sites
Product/
Registration
Number
Forms1
Max
Application
Rate
(
Unit/
Area)
Max
Application
Rate
(
year)

22
Sorghum
Banvel
/
7969­
131
Banvel
845H/
7969­
140
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
All
0.2748
(
lbs
a.
e./
A)
0.5
(
lbs
a.
e./
A)
year
Soybean
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Dicamba
SG/
42750­
43
Sodium
Salt,
DGA
2.0
(
lbs
a.
e./
A)
year
2.0
(
lbs
a.
e./
A)
year
Sudangrass
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt
0.5
(
lbs
a.
e./
A)
As
listed
for
Hay.
1.0
(
lbs
a.
e./
A)
year
Sugarcane
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA
2.8
(
lbs
a.
e./
A)
2.8
(
lbs
a.
e./
A)
year
Wheat
Banvel/
7969­
131
Banvel
SGF/
7969­
135
Banvel
845H/
7969­
140
Dicamba
SG/
42750­
43
Gharda
Dimethylamine
Salt
of
Dicamba/
70907­
11
Dimethylamine
Salt,

Sodium
Salt,
DGA,

IPA
0.5
(
lbs
a.
e./
A
)
1.0
(
lbs
a.
e./
A)
year
1There
are
5
forms
of
dicamba
used
in
this
Master
Label
from
the
July
22,
2005
SRRD
Use
Profile:
Dimethylamine
Salt
(
PC
Code
29802),
Sodium
Salt
(
PC
Code
29806),

Diglycoamine
[
DGA]
(
PC
Code
128931),
Isopropylamine
Salt
[
IPA]
(
PC
Code
128944),
and
Potassium
Salt
(
PC
Code
129043).

2
Rate
based
on
label
100­
884
3
Based
on
label
51036­
289
and
7969­
131
23
Figure
II.
b.
Dicamba
crop
usage
on
an
area­
weighted
basis
(
from
USGS;
http://
ca.
water.
usgs.
gov/
pnsp/
pesticide_
use_
maps_
1997/).
24
B.
Receptors
1.
Ecological
Effects
Each
assessment
endpoint
requires
one
or
more
"
measures
of
ecological
effect,"
which
are
defined
as
changes
in
the
attributes
of
an
assessment
endpoint
itself
or
changes
in
a
surrogate
entity
or
attribute
in
response
to
pesticide
exposure.
Ecological
measurement
endpoints
for
the
screening
level
risk
assessment
are
based
on
a
suite
of
registrant­
submitted
toxicity
studies.

Toxicity
studies
used
in
the
risk
assessment
are
usually
performed
on
a
limited
number
of
organisms
in
the
following
broad
groupings:

°
Birds
(
mallard
duck
and
bobwhite
quail)
used
as
surrogate
species
for
terrestrial­
phase
amphibians
and
reptiles
°
Mammals
(
laboratory
rat)
°
Freshwater
fish
(
bluegill
sunfish
and
rainbow
trout)
used
as
a
surrogate
for
aquatic
phase
amphibians
°
Freshwater
invertebrates
(
water
flea
­
Daphnia
magna)
°
Estuarine/
marine
fish
(
sheepshead
minnow)
°
Estuarine/
marine
invertebrates
(
Eastern
oyster
and
mysid
shrimp)
°
Terrestrial
plants
(
corn,
onion,
ryegrass,
wheat,
buckwheat,
cucumber,
soybean,
sunflower,
tomato,
and
turnip)
°
Algae
and
aquatic
plants
(
algae,
diatoms,
and
duckweed)

Within
each
of
these
very
broad
taxonomic
groups,
an
acute
and/
or
chronic
endpoint
is
selected
from
the
available
test
data.
A
discussion
of
some
toxicity
data
available
for
this
risk
assessment
and
the
resulting
measurement
endpoints
selected
for
each
taxonomic
group
is
included
in
Section
III
of
this
document.
A
summary
of
the
assessment
and
measurement
endpoints
selected
to
characterize
potential
ecological
risk
associated
with
dicamba
exposure
is
provided
in
Table
II.
d
below.
25
Table
II.
d.
Summary
of
Assessment
and
Measurement
Endpoints
Assessment
Endpoint
Measurement
Endpoints
1.
Abundance
(
i.
e.,
survival,
reproduction,
and
growth)
of
individual
birds
1a.
Mallard
duck
acute
oral
LD50
1b.
Bobwhite
quail
subacute
dietary
LD50
1c.
Mallard
duck
chronic
reproduction
NOAEL
2.
Abundance
(
i.
e.,
survival,
reproduction,
and
growth)
of
individual
mammal
2a.
Laboratory
rat
acute
oral
LD50
2b.
Laboratory
rat
chronic
(
reproductive)
NOAEC
3.
Survival
and
reproduction
of
freshwater
fish
and
invertebrates
3a.
Rainbow
trout
acute
LC50
3b.
Freshwater
fish
chronic
NOAEC
(
weight
&
length)
3c.
Water
flea
acute
EC50
3d.
Water
flea
chronic
NOAEC
(
offspring)

4.
Survival
and
reproduction
of
estuarine/
marine
fish
and
invertebrates
4a.
Sheepshead
minnow
acute
LC50
4b.
Estuarine/
marine
fish
chronic
NOAEC
&
LOAEC
4c.
Eastern
oyster
acute
EC50
4d.
Estuarine/
marine
invertebrate
chronic
NOAEC
&
LOAEC
5.
Perpetuation
of
individuals
and
populations
of
non­
target
terrestrial
plants
(
crops
and
non­
crop
plant
species)
5a.
Monocot
and
dicot
seedling
emergence
EC25
5b.
Monocot
and
dicot
vegetative
vigor
EC25
6.
Survival
of
beneficial
insects
6a.
Honeybee
acute
contact
LD50
7a.
Algae
and
duckweed
acute
EC50
7b.
Algae
and
duckweed
NOAEC/
EC05
7a.
Algae
and
duckweed
EC50
and
NOAEC/
EC05
It
should
be
noted
that
the
aquatic
animal
and
acute
avian
toxicity
studies
provided
by
the
registrants
were
performed
with
the
dicamba
salts
(
dimethylamine
salt,
sodium
salt,
and
potassium
salt).
Conversion
from
active
ingredient
to
acid
equivalent
was
completed
in
accordance
with
conversion
factors
found
on
the
appropriate
label
and
molecular
weight
differences.
The
LC
50
/
LD
50
/
EC
50
values
from
the
toxicity
tests
with
the
dicamba
salts
were
converted
to
the
acid
equivalent
by
multiplying
the
value
times
the
conversion
factors
presented
below.
26
Form
Molecular
Weight
ae
Conversion
Factor
dicamba
acid
221.0
­­­­

dimethylamine
salt
of
dicamba
226.1
0.977
sodium
salt
of
dicamba
243.0
0.909
potassium
salt
of
dicamba
259.1
0.853
The
emphasis
of
this
preliminary
screening
risk
assessment
is
to
address
risk
to
non­
target
aquatic
and
terrestrial
species
that
may
be
exposed
to
dicamba
and
its
salts.
The
labeled
uses
of
dicamba
(
Table
II.
c.)
could
result
in
exposure
to
aquatic
and
terrestrial
organisms
inhabiting
flowing,
non­
flowing
or
transient
freshwater
waterbodies
and
wildlands
(
forests,
wetlands
and
ecotones,
such
as
edge
and
riparian
habitats).

a.
Aquatic
Effects
Spray
drift
and
surface
runoff/
leaching
to
adjacent
bodies
of
water
are
the
most
likely
sources
of
dicamba
exposure
to
nontarget
aquatic
organisms,
including
listed
species.
Available
acute
toxicity
data
indicates
that
the
toxicity
of
dicamba
varies
with
the
salt
forms
tested.
Study
results
show
that
the
salt
forms
appeared
to
be
practically
non­
toxic
to
freshwater
fishes
(
LC
50
>
100
mg/
L);
however,
dicamba
acid
(
LC
50
=
28
mg
a.
e./
L;
88%
a.
i.)
was
slightly
toxic
to
rainbow
trout.
Toxicity
to
bluegill
was
similar.
The
sodium
salt
of
dicamba
(
26.5%
a.
i.)
was
slightly
toxic
to
daphnids
with
an
EC
50
of
34.6
mg
a.
e./
L.
Dicamba
acid
and
the
other
salts
were
not
toxic
to
daphnids,
with
EC
50
'
s
>
100
mg/
L.
Results
of
acute
aquatic
toxicity
studies
with
the
potassium
salt
of
dicamba
are
questionable
due
to
the
precipitation
of
the
test
material
during
testing.
Toxicity
test
results
with
marine/
estuarine
species
indicate
that
dicamba
acid
is
practically
non­
toxic
to
fish
(
96­
hr
LC
50
>
180
mg
a.
i./
L
­
sheepshead
minnow)
and
invertebrates
(
96­
hr
LC
50
>
100
mg
a.
i./
L
­
grass
shrimp;
96­
hr
LC
50
>
180
mg
a.
i./
L
­
fiddler
crab).
No
toxicity
studies
have
been
conducted
to
determine
potential
chronic
effects
to
freshwater
and
marine/
estuarine
fish
and
aquatic
invertebrates.
Toxicity
studies
with
algae
exposed
to
dicamba
acid
indicate
that
cell
densities
were
significantly
reduced
in
blue­
green
algae
at
test
concentrations
as
low
as
0.061
mg
a.
i./
L.
Aquatic
vascular
plant
species
were
not
as
sensitive
to
dicamba
acid
with
14­
day
EC
50
values
of
>
3.25
mg
a.
i./
L,
which
is
greater
than
the
equivalency
of
the
maximum
application
rate
[
2.9
mg
a.
i./
L
(
4
lb
ai/
ac)].
However,
duckweed
frond
chlorosis
occurred
at
mean
measured
concentrations
as
low
as
0.39
mg
a.
i./
L.
Laboratory
studies
indicate
that
dicamba
should
not
bioaccumulate
in
aquatic
organisms;
however,
it
may
persist
in
sediments
with
an
estimated
half­
life
of
141
days
(
MRID
43245208).
Data
are
currently
unavailable
to
determine
potential
impacts
to
sedimentdwelling
benthic
organisms
and
to
semi­
aquatic/
transitional
habitats
(
wetlands,
riparian
habitats).
27
b.
Terrestrial
Effects
Ground
deposition,
spray
drift,
and
wind
erosion
of
soil
particles
with
resulting
residues
on
foliage
and
on
insects
and
seeds
are
the
most
likely
sources
of
dicamba
exposure
to
nontarget
terrestrial
organisms,
including
listed
species.
In
addition,
uptake
in
plant
roots
and
foliage
would
be
expected
to
occur.
Current
data
were
not
provided
to
determine
the
potential
exposure
to
birds,
mammals,
and
pollinators
from
residues
on
foliage,
insects,
and
seeds.
Available
acute
toxicity
data
indicate
that
the
salt
forms
of
dicamba
are
practically
non­
toxic
to
bobwhite
quail
and
mallard
ducklings
in
the
diet;
however,
oral
gavage
studies
indicate
that
dicamba
acid
(
86.9%
a.
i.)
was
moderately
toxic
(
LD
50
=
188
mg
ai/
kg)
to
bobwhite
quail
and
slightly
toxic
to
mallard
ducks
(
NOEL
could
not
be
determined
due
to
signs
of
toxicity
at
all
test
levels).
In
chronic
studies
with
dicamba
acid
(
86.9%
a.
i.),
a
reduction
in
hatchability
was
observed
in
mallard
ducks
at
1390
ppm
a.
e.
(
NOEC
=
695
ppm
a.
e.).
No
treatment­
related
mortality,
signs
of
toxicity,
or
effects
on
reproduction
were
observed
in
bobwhite
quail.
Dicamba
acid
is
classified
as
practically
non­
toxic
to
small
mammals
on
an
acute
oral
basis.
A
13­
week
subchronic
oral
study
in
Charles
River
CD
rats
reported
body
weight
changes
and
liver
effects
at
1000
mg
a.
i./
kg/
day.
Developmental
studies
with
New
Zealand
white
rabbits
reported
irregular
ossification
of
internasal
bones
at
300
mg
a.
i./
kg/
day
(
dicamba
acid,
90.5%
a.
i.)
and
maternal
toxicity
(
abortion
and
clinical
signs
of
toxicity,
including
ataxia,
rales,
and
decreased
motor
activity)
was
reported
at
150
mg
a.
i./
kg/
day.
Maternal
toxicity;
including
mortality,
clinical
signs
of
toxicity,
body
weight
changes,
and
decreased
food
consumption,
was
also
observed
in
Charles
River
CD
rats
at
400
mg
a.
i./
kg/
day
(
dicamba
acid,
85.8%
a.
i.).
In
a
2­
generation
reproduction
study
with
Sprague­
Dawley
rats
(
dicamba
acid,
86.5%
a.
i.),
maternal
neurotoxicity
was
observed
at
doses
of
419
mg
a.
i./
kg/
day
in
males
and
at
450
mg
a.
i./
kg/
day
in
females
and
developmental
effects,
decreased
pup
growth,
were
observed
in
rats
at
a
dose
of
136
mg
a.
i./
kg/
day.
No
toxicity
studies
have
been
conducted
to
determine
the
potential
effect
of
residues
to
pollinators.
An
additional
source
of
exposure
to
dicamba
could
be
in
puddled
water
on
treated
fields
through
preening
and
grooming,
involving
the
oral
ingestion
of
material
from
the
feathers
or
fur.

Terrestrial
plant
toxicity
studies
indicate
that
dicamba
acid
negatively
impacts
seed
germination
(
radicle
length;
soybean
EC
25
=
0.036
lb
ai/
A),
seedling
emergence
(
shoot
length;
soybean
EC
25
=
0.0027
lb
ai/
A),
and
vegetative
vigor
(
shoot
length;
soybean
EC
25
=
0.0068
lb
ai/
A
)
in
monocots
and
dicots.
The
most
sensitive
monocot
tested
was
onion
(
EC
25
=
0.071
lb
ai/
A
­
seed
germination;
EC
25
=
0.0044
lb
ai/
A
­
seedling
emergence;
and
EC
25
=
0.1507
lb
ai/
A
­
vegetative
vigor).
Consequently,
spray
drift
presents
a
potential
risk
to
non­
target
plants
inhabiting
edge
habitats
adjacent
to
target
fields
and
riparian
vegetation
along
streams
and/
or
ponds
in
close
proximity
to
sprayed
fields.

Dicamba
is
readily
absorbed
through
the
foliage
and
roots
of
plants;
consequently,
it
could
be
injurious
to
non­
target
plant
species
by
drift,
runoff,
or
leaching
to
roots.
Dicamba
may
accumulate
in
the
soil
with
frequent
or
extensive
use
which
may
result
in
damage
to
trees,
shrubs,
or
other
ornamentals.
Residuals
of
dicamba
in
soil
have
been
shown
to
reduce
28
emergence
in
sugarbeet
and
cause
petiole
epinasty,
severe
stunting
of
seedlings,
and
trumpeting
(
Dexter
et
al,
1994).
Dicamba
applied
according
to
label
directions
as
a
liquid
spray
for
ground
or
aerial
applications
may
impact
non­
target
plants
for
some
distance
from
the
application
site
depending
on
droplet
size,
wind
speed,
and
other
factors.
Numerous
cases
of
soybean
injury
are
reported
yearly
from
the
use
of
dicamba
on
corn
that
results
in
the
exposure
of
adjacent
fields
of
soybean
to
dicamba
through
spray
drift
and
volatilization
(
Proost
and
Boerboom
2004;
Hartzler
2003).
Injury
includes
leaf
malformations,
terminal
bud
kill,
and
delayed
maturity.
Yield
loss
can
occur
if
soybeans
are
exposed
to
dicamba
after
they
bloom
(
in
the
reproductive
stage).

Since
the
dicamba
salts
rapidly
dissociate
to
dicamba
acid
and
it
rapidly
degrades
under
aerobic
conditions,
it
would
not
be
expected
to
persist
in
surface
soils.
Thus,
risks
from
exposure
to
birds,
small
mammals,
and
soil
invertebrates
through
dermal
contact
or
ingestion
of
soils
should
be
minimal.

2.
Ecosystems
at
Risk
In
terrestrial
and
shallow­
water
aquatic
communities,
plants
are
the
primary
producers
upon
which
the
succeeding
trophic
levels
depend.
If
the
available
plant
material
is
impacted
due
to
the
effects
of
dicamba,
this
may
have
negative
effects
not
only
on
the
herbivores,
but
throughout
the
food
chain.
Also,
depending
on
the
severity
of
impacts
to
the
plant
communities
[
i.
e.,
forests,
wetlands,
ecotones
(
edge
and
riparian
habitats)],
community
assemblages
and
ecosystem
stability
may
be
altered
(
i.
e.
reduced
bird
and
mammal
populations
in
edge
habitats;
reduced
riparian
vegetation
resulting
in
increased
light
penetration
and
temperature
in
aquatic
habitats;
reductions
in
algal
biomass).
In
addition,
allochthonous
input
from
riparian
vegetation
is
not
only
a
significant
component
of
the
food
supply
for
aquatic
herbivores
and
detritivores
but
also
provides
habitat
(
i.
e.
leaf
packs,
materials
for
casebuilding
for
invertebrates).

C.
Assessment
Endpoints
The
portion
of
the
problem
formulation
which
is
an
explicit
statement
of
the
characteristic
of
the
environment
to
be
protected
is
encompassed
in
a
delineation
of
endpoints.
These
endpoints
can
include
a
particular
species,
a
functional
group
of
species,
a
community,
or
an
ecosystem.
29
The
major
endpoints
related
to
aquatic
environments
at
issue
are:
(
a).
Direct
effects
to
growth
and
reproduction
of
aquatic
vascular
and
non­
vascular
plants.
(
b).
Direct
effects
to
fish
and
aquatic
invertebrates
in
the
water
column
via
survival,
reproduction,
and
growth.
(
c).
Direct
effects
to
listed
aquatic
species
via
survival,
reproduction,
and
growth.

The
major
endpoints
related
to
terrestrial
environments
at
issue
are:
(
a).
Direct
effects
to
growth
and
reproduction
of
non­
target
plants.
(
b).
Direct
effects
to
birds
and
mammals
via
survival,
reproduction,
and
growth.
(
c).
Direct
effects
to
listed
terrestrial
species
via
survival,
reproduction,
and
growth.

D.
Conceptual
Model
1.
Risk
Hypothesis:
Problem
formulation
focused
on
laboratory
studies
and
chemical
properties
of
dicamba
acid
and
its
salts
which
indicate
that
the
herbicide
is
mobile,
has
the
potential
to
leach
to
groundwater,
be
transported
via
runoff
to
surface
water
bodies,
persists
in
subsurface
soils
and
sediments,
undergoes
aerobic
biodegradation
in
soils
and
water,
and
does
not
bioaccumulate
in
aquatic
organisms.

The
following
risk
hypotheses
are
defined:

Non­
target
terrestrial
plants
are
subject
to
plant
growth
abnormalities,
lethality,
and
developmental/
reproductive
effects
when
exposed
to
dicamba
acid
and
its
salts
as
a
result
of
the
labeled
uses
of
the
pesticide.

Aquatic
non­
vascular
and
vascular
plants
inhabiting
surface
waters
adjacent
to
a
treated
field
are
subject
to
adverse
effects
to
growth
and
development
when
exposed
to
dicamba
acid
and
its
salts
as
a
result
of
labeled
uses
of
the
pesticide.

Terrestrial
animals,
including
herbivores
and
pollinators,
are
subject
to
adverse
effects
such
as
reproductive/
developmental
effects
in
birds
and
mammals,
and
indirect
effects
on
foraging
behavior
when
exposed
to
dicamba
acid
and
its
salts
as
a
result
of
the
labeled
use
of
the
pesticide.

Aquatic
invertebrates,
including
benthic
organisms
inhabiting
the
sediment
and/
or
pore
water,
and
fish
inhabiting
surface
waters
adjacent
to
a
treated
field
are
subject
to
adverse
effects
on
reproduction,
growth,
and
survival
when
exposed
to
dicamba
acid
and
its
salts
as
a
result
of
the
labeled
uses
of
the
pesticide.

Indirect
effects
to
community
assemblages
in
forest,
wetlands,
edge
and
riparian
habitats
could
occur
as
a
result
of
adverse
direct
effects
to
non­
target
plants
from
exposure
to
30
dicamba
acid
and
its
salts;
resulting
in
reduced
food
supply
and
habitat
availability
affecting
species
abundance
and
diversity.

2.
Diagram:
Based
on
an
examination
of
the
physical/
chemical
properties
of
dicamba
and
its
salts,
the
fate
and
disposition
in
the
environment,
and
mode
of
application
(
e.
g.,
ground
and
aerial
spray
application);
a
conceptual
model
(
Figure
II.
c)
was
developed
that
represents
the
possible
relationships
between
the
stressor,
ecological
endpoints,
and
the
measurement
endpoints.
31
Figure
II.
c.
Dicamba
ERA
conceptual
model
32
E.
Analysis
Plan
The
analysis
plan
is
the
final
step
in
Problem
Formulation.
The
plan
describes
the
three
measures
used
to
evaluate
the
risk
hypotheses
developed
in
the
conceptual
model
for
dicamba
use.
First,
the
measures
of
exposure
are
derived
as
estimated
environmental
concentrations
(
EEC)
based
on
model
predictions
and
environmental
fate
data.
This
screening
assessment
will
use
more
refined
models
to
predict
exposure.
Second,
the
measures
of
effect
characterize
the
assessment
endpoints
and
are
based
on
toxicity
data
that
describe
the
effects
of
diamba
on
individuals,
species,
populations,
and
communities
in
aquatic
and
terrestrial
ecosystems.
Third,
the
measures
of
ecosystem
and
receptor
characteristics
describe
the
attributes
of
the
receptors
and/
or
ecosystems
that
may
be
affected
by
exposure
to
the
stressor
(
i.
e.
behavior
and
life
history
characteristics).
The
analysis
plan
also
identifies
the
data
gaps
and
uncertainties
for
conducting
the
risk
assessment
and
suggests
recommendations
for
new
data
collection
(
if
needed).

1.
Preliminary
Identification
of
Data
Gaps
and
Methods:
Environmental
fate
data
for
dicamba
acid
is
mostly
complete.
Fate
data
are
available
concerning
the
hydrolysis
and
photodegradation
of
dicamba
in
water,
the
biodegradation
of
dicamba
in
soil,
and
the
mobility
of
dicamba
acid
in
soil
and
water.
There
is
uncertainty
in
the
environmental
fate
of
the
typical
end
use
products
(
TEPs)
which
contain
the
sodium,
DMA
or
DGA
salts.
Dissociation
rates,
adsorption/
desorption
rates
and
field
dissipation
information
are
needed
for
TEPs
to
determine
the
persistence
and
mobility
of
the
salts
and
their
associated
inert
ingredients
found
in
the
TEPs.
A
submitted
laboratory
study
with
each
salt
of
dicamba
(>
99%
purity)
indicates
rapid
dissociation
in
pure
water;
however,
information
is
needed
on
the
environmental
fate
of
the
formulated
TEPs
which
contain
the
dicamba
salts
and
inert
ingredients.

Due
to
the
widespread
use
of
dicamba
in
agricultural,
industrial
and
residential
settings
as
as
well
as
the
detection
of
dicamba
in
groundwater,
prospective
groundwater
studies
are
needed
to
provide
information
on
the
potential
for
soil
leaching
and
groundwater
migration
potential
of
dicamba
in
field
conditions.
A
key
aspect
of
the
field
studies
should
include
the
formulated
TEPs.

Spray
drift
in
conjunction
with
volatilization
presents
a
potential
risk
to
non­
target
plants
inhabiting
forest
and
edge
habitats
adjacent
to
target
fields
and
wetland
and
riparian
habitats
along
streams
and/
or
ponds
in
close
proximity
to
sprayed
fields.
There
are
numerous
label
restrictions
for
ground
and
aerial
spray
applications
(
see
SAN
845H
and
Banvel
SGF
labels).
Spraying
is
not
recommended
if
wind
is
gusty
or
in
excess
of
5
mph
and
moving
in
the
direction
of
adjacent
sensitive
crops.
Recommendations
on
spray
systems
for
coarse
spray
application
are
included
on
the
labels
as
well
as
directions
for
keeping
the
spray
pressure
at
or
below
20
psi
and
spray
volume
at
or
above
20
gpa.
Finally,
applications
adjacent
to
sensitive
crops
are
not
advised
when
temperature
on
the
day
of
application
is
expected
to
exceed
85
°
C
as
drift
is
more
likely
to
occur.
Submitted
dicamba
field
dissipation
studies
indicate
half­
lifes
of
3
to19.8
days
for
sodium,
DMA
and
DGA
salts
when
applied
to
bareground
plots.
However,
these
field
dissipation
studies
are
inadequate
since
application
rates
were
not
verified,
soil
sample
storage
stability
data
were
inadequate,
pan
evaporation
data
were
not
collected
and
precipitation/
irrigation
was
inadequate
to
fulfill
test
guidelines.
33
Toxicity
studies
are
available
to
determine
the
potential
acute
effects
to
freshwater
and
marine/
estuarine
fish
and
invertebrates
and
the
potential
effects
to
aquatic
vascular
and
nonvascular
aquatic
plants.
Data
are
currently
unavailable
to
determine
potential
chronic
effects
to
freshwater
and
marine/
estuarine
fish
and
invertebrates
and
potential
impacts
to
sedimentdwelling
biota
since
lab
studies
indicate
that
dicamba
may
have
the
potential
to
persist
in
sediments.

Toxicity
studies
are
available
to
determine
the
potential
acute
effects
to
birds,
mammals
and
honey
bees
and
the
potential
reproductive/
developmental
effects
to
birds
and
mammals.
Residues
may
affect
the
foraging
behavior
of
herbivores
(
birds,
mammals)
and
of
pollinators;
however,
data
are
not
available
to
determine
the
potential
exposure
levels
from
residues
in
foliage,
insects,
seeds,
and
roots.
Additional
data
may
be
needed
to
adequately
determine
the
potential
for
residues
on
non­
target
plants
resulting
from
spray
drift
application.

For
this
screening
risk
assessment,
the
potential
exposure
of
dicamba
to
aquatic
benthic
organisms
in
sediments
(
aquatic
invertebrates)
and
to
terrestrial
herbivores
and
pollinators
in
residues
will
be
modeled.
The
Tier
II
PRZM/
EXAMS
models
will
be
used
to
estimate
exposure
in
surface
water.
The
potential
levels
of
dicamba
residues
on
various
food
items
for
birds
and
terrestrial
animals
will
be
modeled
using
the
T­
REX
1.2.3.
Likewise,
TerrPlant
1.0
model
will
estimate
exposure
to
nontarget
terrestrial
plants.

2.
Measures
to
Evaluate
Risk
Hypotheses
and
Conceptual
Model
Measures
of
Exposure
Based
on
the
conceptual
model
presented
above
(
Fig.
II.
c.),
the
potential
exposure
pathways
by
which
dicamba
may
inadvertently
affect
non­
target
plant
and
animal
populations
in
aquatic
areas
include:
drift
during
aerial
and
ground
application,
particularly
downwind
drift,
and
runoff/
leaching
of
contaminated
water
from
treated
areas
to
untreated
areas.
In
semi­
aquatic
areas,
the
routes
are:
drift
during
aerial
and
ground
application,
particularly
downwind
drift;
runoff
events
(
off­
site
movement
of
contaminated
water);
and
wind
erosion
of
contaminated
soil
particles.
Since
dicamba
is
designed
to
kill
weeds,
there
may
be
exposure
to
non­
target
terrestrial
plants
adjacent
to
treated
areas
via
drift
and
runoff
from
transitional
sites
or
wetlands
which
may
be
dry
during
certain
periods,
or
via
wind­
blown
treated
soil
particles
from
those
pathways
for
aquatic
species.
As
part
of
the
aquatic
assessment,
EFED
modeled
exposure
concentrations
of
dicamba
to
nontarget
aquatic
plants
and
invertebrates
following
labeled
use
information.
For
aerial
and
ground
spray
applications,
dicamba
surface
water
concentrations
were
estimated
using
the
Tier
II
screening
models
PRZM
and
EXAMS
employing
the
standard
field
pond
scenario
The
potential
exposure
pathways
for
terrestrial
plants
and
animals
include
deposition
from
ground
and
aerial
spray
applications,
runoff/
leaching
from
treated
areas,
spray
drift,
and
wind
erosion
of
soil
particles
resulting
in
residues
on
non­
target
organisms
as
well
as
residues
on
food
items
for
non­
target
organisms.
As
part
of
the
terrestrial
assessment,
EFED
modeled
exposure
concentrations
of
dicamba
to
nontarget
terrestrial
plants
and
animals
following
the
ground
and
aerial
spray
application
rates
for
terrestrial
uses
(
Table
II.
e).
34
Table
II.
e.
Exposure
Scenarios
for
Dicamba
Risk
Assessment
Crop
(
location)
Application
Ratea
(
lbs
ae/
A)
Application
number/
year
Application
Date
Label
Reference
(
Registration
Number
Asparagus
(
MI)
0.5
1
May
1,
20xx
SAN
845H
(
7969­
140)

Corn
(
CA,
IL,
MS,
NC
ND,
MS,
PA,
TX)
0.75
(
total
of
2
applications)
2
April
15,
20xx
May
15,
20xx
SAN
845H
(
7969­
140)

Pasture/
Rangeland
(
CA,
MN,
PA,
TX)
2.0
1
May
1,
20xx
SAN
845H
(
7969­
140)

Sorghum
(
KA,
TX)
0.5
(
total
of
2
applications)
2
May
1,
20xx
June
1,
20xx
SAN
SGFc
(
7969­
135)

Soybean
(
MS)
2.0
1
May
1,
20xx
SAN
SGFc
(
7969­
135)

Sugarcane
(
FL,
LA)
2.8
1
April
15,
20xx
SAN
845Hb
(
7969­
140)

Turf
(
PA,
FL)
2.0
1
May
1,
20xx
SAN
SGFc
(
7969­
135)

Wheat
(
ND,
OR,
TX)
1.0
(
total
of
2
applications)
2
May
1,
20xx
June
1,
20xx
SAN
845H
(
7969­
140)

aApplication
rates
taken
from
Dicamba
Use
Profile
(
SRRD
July
22,
2005).
bSAN845H
herbicide
contains
77.0%
sodium
salt
of
dicamba
which
is
equivalent
to
70.0%
dicamba
acid
(
label
dated
March
24,
2004).
CSAN
SGF
herbicide
contains
23.15%
dimethylamine
salt
of
dicamba
which
is
equivalent
to
21.06%
dicamba
acid
(
label
dated
March
8,
2004).

Specific
uses
chosen
for
modeling
include
asparagus,
corn,
pasture/
rangeland,
sorghum,
soybean,
sugarcane,
turf
and
wheat
(
Table
II.
f.).
Although
these
uses
represent
only
a
portion
of
the
crops
for
which
dicamba
has
a
labeled
use,
crops
with
highest
application
rates
and
crops
which
have
a
large
percentage
of
their
total
acreage
treated
with
dicamba
are
among
these
uses.
Some
crops
with
large
total
acreage
treated
were
also
included
as
modeled
scenarios.
These
crops
were
also
chosen
to
represent
a
wide
geographic
area,
thus
encompassing
a
variety
of
environmental
conditions.
By
encompassing
crops
with
large
percentages
of
acreage
treated
with
dicamba
and
a
large
geographic
area,
some
crops
with
lower
maximum
application
rates
were
also
covered
by
the
set
of
scenarios.
All
application
rates
were
adjusted
to
acid
equivalents.
Risks
to
aquatic
organisms
(
i.
e.
fish,
invertebrates,
and
plants)
and
terrestrial
organisms
(
i.
e.
birds,
mammals,
and
plants)
are
assessed
based
on
modeled
Estimated
Environmental
Concentrations
(
EECs).
EECs
for
dicamba
uses
on
terrestrial
sites
were
modeled
using
T­
REX
(
Ver.
1.2.3)
to
estimate
dicamba
residues
on
35
various
food
items
which
may
be
contacted
or
consumed
by
wildlife.
Exposure
concentrations
for
nontarget
plants
were
evaluated
for
the
use
scenarios
using
the
TerrPlant
1.0
model.

Table
II.
f.
Surface
Water
Exposure
Inputs
for
PRZM/
EXAMS
for
Dicamba
acid.

Input
variable
(
Units)
Input
value
&
calculations
Source
Crop
name
See
table
II.
e.
See
table
II.
e.

Application
rate
(
lb
ai/
acre)
See
table
II.
e.
See
table
II.
e.

Interval
between
appl.
(
d)
N/
A
N/
A
Application
efficiency
0.95
(
aerial);
0.99
(
ground)
Input
parameters
guideline
(
2/
28/
2002).

Spray
drift
fraction
0.05
(
aerial);
0.01
(
ground)
Input
parameters
guideline
(
2/
28/
2002).

DWRATE
(
day­
1)
0.038
(
6
d
x
3)
MRID
#
43245207;
Input
parameters
guideline
(
2/
28/
2002).

DSRATE
(
day­
1)
0.038
MRID
#
43245207;
Input
parameters
guideline
(
2/
28/
2002).

Koc
(
mL/
g)
13.4
(
average
Koc)
MRID#
42774101;
Input
parameters
guideline
(
2/
28/
2002).

Henry's
Law
Const.
(
atm.
m3/
mole)
1.6X10­
9
calculated
KBACW
(
h­
1)
0.058
(
6X2=
12
d)
No
data;
aerobic
soil
metabolism
half­
life
rate
X
0.5;
Input
parameters
guideline
(
2/
28/
2002).

KBACS
(
h­
1)
0.0016
(
141X3=
423
d)
MRID#
43245208;
Input
parameters
guideline
(
2/
28/
2002).

KDP
(
h­
1)
0.00076
(
914.4)
MRID#
42774102;
Input
parameters
guideline
(
2/
28/
2002).

KBH,
KNH,
KAH
(
h­
1)
stable
MRID#
40547902;
Input
parameters
guideline
(
2/
28/
2002).

KPS
(
mL/
g)
13.4
(
average
Koc)
MRID#
42774101;
Input
parameters
guideline
(
2/
28/
2002).

MWT
(
g/
mole)
221
SANDOZ
Safety
Data
Sheet
(
Nov,
1989).

Solubility
@
25
0C
(
mg/
L)
6100
SANDOZ
Safety
Data
Sheet
(
Nov,
1989).

Vapor
pressure
(
torr)
3.41X10­
5
SANDOZ
Safety
Data
Sheet
(
Nov,
1989).
36
Monitoring
data
Monitoring
data
were
not
used
to
refine
this
Tier
I
preliminary
risk
assessment.
However,
monitoring
data
are
available
in
the
Pesticides
in
Ground
Water
Database
[
Hoheisel
et
al.
1991]
for
dicamba
(
3,172
wells
sampled)
and
5­
hydroxy
dicamba
(
87
wells
sampled).
Out
of
the
wells
sampled,
there
were
no
reports
of
residues
greater
than
the
stated
MCL
(
200
µ
g/
L
lifetime).
However,
the
detection
limits
are
unknown,
and
it
is
not
known
if
wells
were
sampled
in
areas
where
dicamba
was
used.
STORET
contains
records
for
dicamba
analyses
in
samples
from
lakes,
ocean,
estuary,
canal,
or
reservoir
sites.
The
data
have
not
been
extensively
evaluated;
in
addition,
it
is
uncertain
what
the
actual
detection
limits
were
for
the
samples
and
whether
samples
were
taken
from
areas
where
dicamba
was
not
in
use.

NAWQA
analyzed
for
dicamba
in
the
1993­
2004
survey
of
groundwater
wells
and
surface
waters
of
agricultural,
urban
and
mixed
land­
use
settings.
A
total
of
4676
groundwater
samples
were
collected;
detections
of
dicamba
were
in
six
samples
at
0.035
ppb.
Dicamba
was
detected
in
141
surface
water
samples
(
total
of
samples
collected
were
5813
samples).

Surface
and
Groundwater
monitoring
data
are
limited
spatially
and
temporally
in
dicamba
use
areas
to
extract
useful
information
about
expected
dicamba
concentration
in
drinking
water
in
use
areas.
Thus;
at
this
time
EFED
believes
that
at
the
absence
of
a
representative
monitoring
data,
the
use
of
modeling
results
for
surface
and
water
would
be
more
appropriate
III.
ANALYSIS
Analysis
is
a
process
that
examines
the
two
primary
components
of
risk,
exposure
and
effects,
and
their
relationships
between
each
other
and
site
characteristics.
The
objective
is
to
provide
the
ingredients
necessary
for
determining
or
predicting
ecological
responses
to
pesticide
uses
under
exposure
conditions
of
interest.
The
products
of
analysis
provide
the
basis
for
estimating
and
describing
risks
in
risk
characterization.
The
dicamba
prelimnary
risk
analysis
consists
of
evaluating
environmental
fate
data,
modeling
exposure
concentrations
and
evaluating
toxicity
information
to
formulate
potential
risks
to
the
defined
endpoints
shown
in
Figure
II.
b.
The
analysis
is
based
on
Tier
I
screening
risk
assessment
modeling
of
estimated
exposure
concentrations
combined
with
toxicity
information
from
dicamba
toxicity
studies.

A.
Use
Characterization
Dicamba
was
first
registered
in
the
United
States
in
1967
and
is
widely
used
in
agricultural,
industrial
and
residential
settings.
Dicamba
herbicide
is
available
in
aqueous
formulations
and
is
commonly
mixed
in
tanks
with
other
herbicides
and/
or
fertilizers
before
application.
In
aqueous
forms,
dicamba
is
applied
as
a
pre­
and
post­
emergent
via
aerial
or
ground
spray
for
control
of
most
annual,
biennial
and
perennial
broadleaf
weeds
in
crops.
Dicamba
is
used
to
control
weeds
and
brush
in
pasture,
rangeland
and
noncropland
areas
such
as
utility,
highway
right­
of­
ways
and
non­
irrigation
ditchbanks
including
grazed
or
hayed
areas.
Dicamba
is
also
used
on
residential
turf
and
lawns
as
well
as
golf
courses
for
control
of
weeds
and
other
unwanted
plants.
37
B.
Exposure
Characterization
The
dicamba
exposure
characterization
in
this
assessment
combined
the
environmental
fate
data
with
Tier
II
exposure
models
to
estimate
environmental
exposure
concentrations
(
EECs).
Exposure
models
estimate
EECs
following
the
conceptual
diagram
of
dicamba
usage
and
potential
exposure
endpoints
shown
in
Figure
II.
b.
EECs
for
aquatic
endpoints
are
developed
using
the
Tier
II
surface
water
models
PRZM/
EXAMS.
These
models
are
more
comprehensive
and
determine
EECs
based
on
geographic
areas
nationwide
and
product
use
sites
in
close
proximity
to
water
bodies.
The
goal
of
Tier
II
modeling
is
to
better
define
the
range
of
EECs
that
can
be
reasonably
expected
under
variable
weather
conditions.
Likewise,
EECs
for
birds
and
terrestrial
mammals
are
estimated
using
the
T­
REX
1.2.3
model
and
EECs
for
non­
target
plants
are
estimated
by
the
TerrPlant
1.0
model.

1.
Environmental
Fate
and
Transport
Characterization
EFED
established
a
strategy
for
bridging
the
environmental
fate
data
requirements
for
the
dicamba
sodium
and
potassium
salts,
dimethylamine
salt
(
DMA),
isopropylamine
salt
and
diglycoamine
salt
(
DGA)
to
the
dicamba
acid.
Bridging
data
were
submitted
indicating
that
the
dicamba
salts
will
be
rapidly
converted
to
the
free
acid
of
dicamba.
A
laboratory
dissociation
study
showed
that
each
dicamba
salt
(
tested
at
>
99%
purity)
completely
dissociated
to
dicamba
acid
within
75
seconds
in
pure
water
(
MRID
43288001).
EFED
determined
that
fate
studies
conducted
with
dicamba
acid
provide
"
surrogate
data"
for
the
dicamba
salts.
However,
there
is
uncertainty
regarding
the
fate
of
formulated
technical
end
use
products
(
TEPs)
containing
the
dicamba
salts
in
the
environment.
The
influence
of
inert
ingredients,
in
formulated
TEPs,
on
the
degradation
potential,
soil
adsorption/
desorption
and
migration
of
dicamba
are
unresolved.
Furthermore,
dicamba
is
often
mixed
in
tanks
before
application
with
other
herbicides
and
fertilizers
which
may
influence
the
environmental
fate
of
dicamba.
This
fate
summary
does
not
address
inert
ingredients
or
other
herbicides
available
in
mixtures
with
dicamba.

In
hydrolysis
studies,
uniformly
ring­
labeled
[
14C]
dicamba
(
3,6­
dichloro­
o­
anisic
acid)
did
not
degrade
significantly
in
aqueous
buffered
solutions
adjusted
to
pH
5,
7,
and
9,
and
distilled
water
treated
with
dicamba
at
10
ppm
or
100
ppm
and
incubated
in
the
dark
at
25
or
35
/

C
for
30
days.
In
the
test
solutions
incubated
at
25
/

C,
parent
dicamba
was
92.36­
98.03%
of
the
applied
radioactivity
at
30
days
post­
treatment.
In
the
test
solutions
incubated
at
35
/

C,
parent
dicamba
was
>
92.4%
of
the
applied
radioactivity,
except
for
the
pH
7
test
solution
treated
at
100
ppm;
parent
dicamba
was
82.46%
at
29
days
post­
treatment.
Three
unidentified
degradates
were
each
<
3.54%
of
the
applied
radioactivity
in
any
of
the
test
systems.
The
material
balances
were
83.36­
103.21%
(
MRID
40335501).

The
aqueous
photolysis
of
dicamba
(
3,6­
dichloro­
o­
anisic
acid)
resulted
in
a
half­
life
of
>
30
days.
This
study
was
conducted
in
a
sterile
aqueous
buffer
solution
(
pH
7)
that
was
irradiated
for
30
days
with
a
xenon
arc
lamp
at
25
/

C;
dicamba
did
not
degrade
in
the
dark
control
sample.
The
registrant­
calculated
half­
life
was
38.1
days
under
continuous
irradiation
at
1.38
times
natural
sunlight
at
noon
in
the
spring
at
40
/

N.
The
major
identified
degradate
was
carbon
dioxide
(
maximum
of
15.26%
of
the
applied
radioactivity
at
30
days).
Numerous
other
degradates
were
present
at
<
7.72%
each
and
were
not
identified
(
MRID
42774102).

In
soil
photolysis
studies,
dicamba
(
3,6­
dichloro­
o­
anisic
acid)
slowly
photodegraded
(
approximately
20%)
on
silt
loam
soil
that
was
continuously
irradiated
with
a
xenon
arc
lamp
38
for
30
days
at
25
/

C.
Dicamba
acid
did
not
degrade
in
the
dark
control.
The
only
identified
degradate
was
carbon
dioxide
(
maximum
of
3.07%
of
the
applied
at
30
days);
although
unidentified
degradates
were
formed
during
the
study,
none
were
present
at
>
3.71%
of
the
applied
at
any
time
(
MRID
42774103).

Aerobic
soil
metabolism
was
studied
in
a
silt
loam
soil
that
was
moistened
to
75%
of
0.33
bar,
treated
at
2.555
µ
g/
g
(
3.2
µ
g/
g
dry
weight)
with
dicamba
acid,
and
incubated
aerobically
in
the
dark
at
approximately
23
°
C
for
365
day.
Dicamba
acid
was
found
to
degrade
with
a
halflife
of
6
days.
CO
2
and
3,6­
dichlorosalicylic
acid
(
3,6­
DCSA)
were
the
primary
degradates
identified,
at
maximum
concentrations
of
67.3
and
17.4%
of
the
applied,
respectively.
Two
minor
degradates,
5­
hydroxy
dicamba
(
5­
OH)
and
3,6­
dichloro­
2,5­
dihydorxybenzoic
acid
(
2,5­
DiOH),
were
also
identified
at
maximum
concentrations
of
0.8
and
2.7%
of
the
applied,
respectively.
Other
nonvolatile
degradates
were
isolated
at
up
to
3.7%
of
the
applied
but
were
not
identified
(
MRID
43245207).

In
anaerobic
soil
metabolism
studies,
dicamba
acid
degraded
with
a
half­
life
of
141
days
in
loam
soil:
pond
water
systems
that
were
treated
at
3.85
ppm
and
incubated
in
the
dark
for
12
months
under
anaerobic
(
nitrogen
gas)
conditions
at
approximately
25
°
C.
The
major
degradate
identified
in
the
soil:
water
systems
was
3,6­
dicholorsalicylic
acid
(
3,6­
DCSA)
at
a
maximum
of
61.6%
of
the
applied.
Two
minor
degradates,
5­
hydroxy
dicamba
(
5­
OH
dicamba)
and
3,6­
dichloro­
2,5­
dihydroxybenzoic
acid
(
3,6­
dichlorogentisic
acid;
3,6­
DCGA),
were
also
identified
;
maximum
concentrations
were
1.9
and
3.64%
of
the
applied,
respectively.
Volatile
[
14C]
residues
were
a
maximum
of
1.3%
of
the
applied
radioactivity
at
12
months
post
treatment
(
MRID
43245208).

The
anaerobic
aquatic
degradation
study
of
dicamba
acid
found
a
half­
life
of
141
days
in
loam
soil:
pond
water
systems
that
were
treated
at
3.85
ppm
and
incubated
in
the
dark
for
12
months
under
anaerobic
(
nitrogen
gas)
conditions
at
approximately
25
°
C.
The
major
degradate
identified
in
the
soil:
water
systems
was
3,6­
dicholorsalicylic
acid
(
3,6­
DCSA)
at
a
maximum
of
61.6%
of
the
applied.
Two
minor
degradates,
5­
hydroxy
dicamba
(
5­
OH
dicamba)
and
3,6­
dichloro­
2,5­
dihydroxybenzoic
acid
(
3,6­
dichlorogentisic
acid;
3,6­
DCGA),
were
also
identified
;
maximum
concentrations
were
1.9
and
3.64%
of
the
applied,
respectively.
Volatile
[
14C]
residues
were
a
maximum
of
1.3%
of
the
applied
radioactivity
at
12
months
post
treatment
(
MRID
43245208).

The
aerobic
aquatic
metabolism
study
of
uniformly
phenyl
ring
labeled
[
14C]
dicamba
acid,
at
a
nominal
application
rate
of
0.12
µ
g/
mL,
resulted
in
a
registrant­
calculated
half­
life
of
20.2
days
in
aerobic
flooded
loam
soil
that
was
incubated
in
darkness
at
25
±
1
°
C
for
62
days.
Using
non­
linear
analysis,
a
slightly
longer
registrant­
calculated
half­
life
of
24.3
days
was
determined.
In
the
total
soil/
water
system,
the
parent
(
reviewer­
calculated)
was
97.2­
100%
of
the
applied
radioactivity
at
0­
3
days,
decreased
to
81.7%
by
14
days
and
to
60.2%
by
21
days,
was
36.2%
at
30
days,
and
was
not
detected
by
51
days
post
treatment.
The
parent
compound
in
the
water
phase
was
initially
present
at
91.9%
(
0.113
ppm)
of
the
applied
radioactivity
at
day
0,
decreased
to
54.6­
75.6%
by
14­
21
days
post
treatment,
and
decreased
to
22.4%
(
0.55ppm)
by
41
days
post
treatment.
In
the
soil
(
Soil
Extract
1),
the
parent
compound
was
initially
present
at
7.05%
(
0.009ppm)
of
the
applied
radioactivity
at
day
1
(
methanol
extract
only),
decreased
to
6.10%
(
0.008ppm)
by
1
day
post
treatment,
then
increase
to
a
maximum
of
8.54%
(
0.011ppm)
by
3
days
post
treatment,
and
decreased
to
39
3.66%
(
0.005ppm)
by
day
41
post
treatment.
The
minor
degradate
3,6­
DCSA
was
initially
observed
in
the
water
phase
at
6.50%
(
0.008ppm)
of
the
applies
activity
at
14
days
post
treatment,
increased
to
a
maximum
of
8.55%
(
0.011ppm)
by
30
days,
and
decreased
to
0.813%
(
0.001ppm,
based
on
a
single
replicate)
by
day
62.
In
the
"
Soil
Extract
1"
(
methanol),
3,6­
DCSA
was
present
at
1.63%
(
0.002ppm)
at
30
days
post
treatment
and
<
0.001%
at
62
days
post
treatment
only.
In
the
"
Soil
Extract
2"
(
acidified
methanol:
water),
the
major
degradate
3,6­
DCSA
was
present
at
3.26%
(
0.004ppm)
at
day
14
post
treatment,
increased
to
26.0%
(
0.032ppm)
by
day
41,
and
decreased
to
4.88%
(
0.001ppm)
by
day
62.
The
distribution
of
[
14C]
residues
between
the
soil
and
water
fractions
was
not
reported,
but
the
majority
of
the
residues
were
observed
in
the
water
phase
throughout
the
study.
[
14C]
Residues
in
the
water
phase
were
92.4%
(
0.114ppm)
of
the
applied
radioactivity
at
day
0
and
decreased
to
2.04%
(
0.003ppm)
by
62
days
post
treatment.
In
the
soil
extracts,
total
[
14C]
residues
were
7.05%
(
0.009ppm)
of
the
applied
radioactivity
at
day
0,
increased
to
43.9%
(
0.054ppm)
by
41
days
,
and
were
22.0%
(
0.027ppm)
at
62
days
post
treatment.
Nonextractable
[
14C]
residues
comprised
14.65%
(
0.18ppm)
of
the
applied
at
62
days
post
treatment.
Evolved
14CO
2
accounted
for
1.63%
(
0.002ppm)
of
the
applied
radioactivity
at
14
days
post
treatment
and
was
53.6%
(
0.066ppm)
at
62
days
post
treatment
(
MRID
43758509).

An
aqueous
dissociation
study
was
conducted
to
provide
bridging
data
for
dicamba
salts.
As
determined
by
a
UV
spectrophotometric
method,
dicamba
salts
reached
essentially
100%
dissociation
within
75
seconds
of
the
time
of
mixing
with
pure
water.
The
observed
dissociation
half­
lives
in
pure
water,
0.1
N
NaOH
(
pH
13),
and
0.1
N
HCl
(
pH
1)
for
all
of
the
salts
were
less
than
10
seconds,
establishing
a
value
6.9
x
10­
2
sec­
1
as
the
lower
limit
for
the
dissociation
fate
constant
for
each
of
the
salts.
These
data,
combined
with
the
fact
that
dicamba
is
a
moderately
strong
acid
(
pK
a
=
1.87)
predict
that
when
these
dicamba
salts
are
release
into
the
environment
dissociation
will
be
rapid
(
MRID
43288001).

The
adsorption/
desorption
of
unaged
phenyl
ring­
labeled
[
14C]
dicamba
was
studied
in
loam,
clay
loam,
silt
loam,
and
sandy
loam
soils,
and
loam
sediment.
Based
on
batch
equilibrium
experiments,
dicamba
acid
was
determined
to
be
very
mobile
in
loam,
clay
loam,
silt
loam,
and
sandy
loam
soils
and
a
loam
sediment,
with
Freundlich
K
ads
values
of
0.16,
0.10,
0.53.
0.07
and
0.21,
respectively.
Corresponding
K
oc
values
were
7.27,
3.45,
21.1,
17.5
and
17.5,
respectively
(
MRID
42774101).

Adsorption/
desorption
in
soil
information
from
an
acceptable
aerobic
soil
metabolism
study
(
MRID
43245207)
indicates
that
3,6­
DCSA
(
3,6­
Dichlorosalicylic
acid)
is
the
only
degradate
formed
at
greater
that
10%
of
the
applied.
Based
on
batch
equilibrium
experiments
3,6­
DCSA
was
determined
to
be
mobile
in
sandy
loam
(
Freundlich
K
ads
value
of
2.51;
Ko
c
628)
and
clay
loam
(
K
ads
7.03;
Koc
242)
soils.
DCSA
was
determined
to
be
of
low
mobility
in
silt
loam
and
loam
soils
and
in
loam
sediment;
Freundlich
K
ads
values
were
20.29,
31.50,
and
35.16,
respectively;
corresponding
K
oc
values
were
812,
1432,
and
2930,
respectively
(
MRID
43095301).

Laboratory
Volatility
studies
were
conducted
with
the
potassium
salt
of
dicamba
and
the
dimethylamine
salt
of
dicamba
and
formulated
with
adjuvant.
Dicamba
(
as
the
potassium
salt)
volatilized
from
moist
silty
clay
soil
that
was
treated
at
a
nominal
field
rate
of
0.5
lb
ai/
A
(
1.511
mg
ai/
jar)
with
a
soluble
concentrate
formulation
fortified
with
[
14C]
dicamba
(
radiochemical
purity
>
98%).
Volatility
rates
ranged
from
2.98
to
4.97
x
104
:
g/
cm2/
hr;
this
40
corresponded
to
air
concentrations
of
12.6­
21.0,
:
g/
m3.
Samples
were
incubated
for
up
to
96
hours
on
a
16­
hour
photoperiod
under
continuous
air­
flow
(
0.1
L/
min)
at
30
C
and
60%
relative
humidity.
Recovery
of
the
applied
radioactivity
was
96.5%.
Dicamba
(
as
the
dimethylamine
salt
formulated
with
the
adjuvant
Atplus
411f)
volatilized
from
moist
silty
clay
soil
that
was
treated
at
a
nominal
field
rate
of
0.5
lb
ai/
A
(
1.511
mg
ai/
jar)
with
soluble
concentrate
formulations
fortified
with
[
14C]
dicamba
(
radiochemical
purity
>
98%).
Volatility
rates
ranged
from
2.91
to
4.95
x
l0­
4
:
g/
cm2/
hr;
this
corresponded
to
air
concentrations
of
12.4­
21.0,
:
g/
m3.
Samples
were
incubated
for
up
to
96
hours
on
a
16­
hour
photoperiod
under
continuous
air­
flow
(
0.1
L/
min)
at
30
°
C
and
60%
relative
humidity.
Recovery
of
the
applied
radioactivity
was
70.6­
88.8%
(
MRID
41966602).

Field
dissipation
studies
of
dicamba
salts
were
conducted
in
several
locations
across
the
US
in
the
early
1990'
s
(
see
table
below).
Dicamba
salt
forms
were
applied
to
bareground
plots
according
to
labeled
rates
and
soils
were
sampled
for
loss
of
parent
compound
and
the
presence
of
degradates
over
time.
The
major
dicamba
degradate
in
soil
samples
was
DCSA.
These
studies
are
supplemental
as
Subdivision
N
guidelines
were
not
fulfilled
in
that
application
rates
were
not
verified
in
the
field,
soil
sample
storage
stability
was
not
verified,
measurements
of
pan
evaporation
were
not
collected
during
the
studies
and
rainfall/
irrigation
amounts
did
not
fulfill
guideline
requirements.

MRID
No.
Dicamba
Test
Substance
Application
Rate
Study
Location
and
Soil
Type
Half­
life
(
days)

43361506
SAN
845
H
(
Na
salt)
SAN
821
H
(
DGA
salt)
1.0
lb
ae/
A
1.0
lb
ae/
A
LA,
silt
loam
soil
LA,
silt
loam
soil
3.2
3.0
43361507
Clarity
and
SAN
821
H
(
DGA
salt)
1.0
lb
ae/
A
NC,
loam
sand
soil
3.29
43651405
SAN
1214
H
(
DMA
salt)
2.0
lb
ae/
A
LA,
silt
loam
soil
9
43651407
Clarity
and
SAN
821
H
(
DGA
salt)
2.0
lb
ae/
A
IN,
loam
soil
12.9
43651408
Banvel
SGF
SAN845
H
(
Na
salt)
2.0
lb
ae/
A
2.0
lb
ae/
A
NC,
loam
sand
soil
NC,
loam
sand
soil
9
9
42754101
42883202
Banvel
4.0
(
DMA
salt)
1.0
lb
ae/
A
CA,
sandy
loam
soil
19.8
42754102
Banvel
4.0
(
DMA
salt)
1.0
lb
ae/
A
IN,
loam
soil
4.4
The
octanol/
water
partition
coefficients
for
3,6­
dichloro­
salicylic
acid
(
DCSA)
at
two
concentrations
(
nominally
4.96
x
104
M
and
5.67
x
10­
5
M)
in
buffered
aqueous
solutions
at
pHs
5,
7,
and
9
ranged
from
0.06
to
0.58
and
averaged
0.29.
Because
of
the
low
K
ow
,
DCSA
is
not
expected
to
bioaccumulate
in
aquatic
organisms
(
MRID
41966601).
41
2.
Measures
of
Aquatic
Exposure
Aquatic
Exposure
Modeling
Aquatic
EECs
for
the
ecological
exposure
to
dicamba
were
estimated
using
PRZM
3.12/
EXAMS
2.98
employing
the
standard
field
pond
scenario.
PRZM/
EXAMS
is
a
Tier
II
screening
model
designed
to
estimate
pesticide
concentrations
found
in
water
at
the
edge
of
a
treated
field.
As
such,
it
provides
high­
end
values
of
the
pesticide
concentrations
that
might
be
found
in
ecologically
sensitive
environments
following
pesticide
application.
PRZMEXAMS
is
a
multi­
year
runoff
model
that
also
accounts
for
spray
drift
from
single
and
multiple
applications.
In
the
ecological
exposure
assessment,
PRZM/
EXAMS
simulates
a
10
hectare
(
ha)
field
immediately
adjacent
to
a
1
ha
pond,
2
meters
deep
with
no
outlet.
The
location
of
the
field
is
specific
to
the
crop
being
simulated
using
site
specific
information
on
the
soils,
weather,
cropping,
and
management
factors
associated
with
the
scenario.
The
crop/
location
scenario
in
a
specific
state
is
intended
to
represent
a
high­
end
vulnerable
site
on
which
the
crop
is
normally
grown.
Based
on
historical
rainfall
patterns,
the
pond
receives
multiple
runoff
events
during
the
years
simulated.
Acute
risk
assessments
are
performed
using
peak
EEC
values
for
single
and
multiple
applications,
if
necessary.
Chronic
risk
assessments
for
aquatic
invertebrates
and
fish
are
performed
using
the
average
21­
day
and
60­
day
EECs,
respectively.

Tables
II.
e
and
II.
f.
present
the
input
parameters
used
in
the
Tier
II
PRZM/
EXAMS
modeling
for
ecological
assessment
of
dicamba
and
DCSA
for
surface
water
sources.
To
simulate
field
application
of
dicamba,
multiple
scenarios
were
selected
representing
different
dicamba
usage
areas
based
on
geography
and
weather
(
see
Fig.
IIa).
PRZM/
EXAMS
scenarios
were
modeled
to
estimate
dicamba
EECs
in
surface
water
based
on
label
information
for
dicamba
application
to
asparagus,
corn,
pasture/
rangeland,
sorghum,
soybean,
sugarcane,
turf
and
wheat
(
Table
II.
d.).
The
modeled
surface
water
EECs
for
the
these
scenarios
are
presented
in
Table
III.
a.
For
a
given
crop,
only
the
highest
EECs
are
presented
in
these
tables;
however;
results
from
all
modeled
scenarios
are
provided
in
Appendix
B.
For
each
PRZM/
EXAMS
scenario,
an
aerial
and
ground
spray
application
was
evaluated
following
dicamba
registered
uses.
The
PRZM/
EXAMS
input
and
output
files
from
the
aquatic
ecological
exposure
assessment
are
presented
in
Appendix
B.

Monitoring
and
Field
Data
Monitoring
data
were
not
used
to
refine
this
Tier
I
preliminary
risk
assessment.
However,
monitoring
data
are
available
in
the
Pesticides
in
Ground
Water
Database
[
Hoheisel
et
al.
1991]
for
dicamba
(
3,172
wells
sampled)
and
5­
hydroxy
dicamba
(
87
wells
sampled).
Out
of
the
wells
sampled,
there
were
no
reports
of
residues
greater
than
the
stated
MCL
(
200
µ
g/
L
lifetime).
However,
the
detection
limits
are
unknown,
and
it
is
not
known
if
wells
were
sampled
in
areas
where
dicamba
was
used.
STORET
contains
records
for
dicamba
analyses
in
samples
from
lakes,
ocean,
estuary,
canal,
or
reservoir
sites.
The
data
have
not
been
extensively
evaluated;
in
addition,
it
is
uncertain
what
the
actual
detection
limits
were
for
the
samples
and
whether
samples
were
taken
from
areas
where
dicamba
was
not
in
use.
The
US
Geological
Survey
National
Water
Quality
Assessment
program
(
NAWQA)
is
not
currently
analyzing
for
dicamba
in
their
samples,
and
they
do
not
have
analytical
methods
for
this
chemical
in
place.
42
NAWQA
analyzed
for
dicamba
in
the
1991­
2001
survey
of
groundwater
wells
and
surface
waters
of
agricultural,
urban
and
mixed
land­
use
settings.
Dicamba
was
only
detected
(>
0.11
µ
g/
L)
in
groundwater
and
surface
waters
of
agricultural
settings.
Frequency
of
detection
was
0.41%
in
groundwater
(
total
of
1218
samples)
and
0.26%
in
surface
waters
(
total
of
1233
samples)
with
detected
values
less
than
1.14
µ
g/
L.

Table
III.
a.
Estimated
Environmental
Concentrations
(
µ
g
ae/
L)
of
Dicamba
Acid
in
Surface
Water
(
PRZM­
EXAMS)
from
All
Uses
for
Ecological
Assessmenta
Simulation
Scenario
Concentration
(
µ
g
ae/
L)

Crop
and
Location
Application
rate
1
in
10
year
Peak
21
Day
Average
60
Day
Average
Asparagus
(
MI)
0.5
lbs
ae/
acre
­
1
application
0.82b
1.73c
0.66b
1.42c
0.42b
0.93c
Corn
(
TX)
0.75
lbs
ae/
acre
­
2
applications
with
30
day
interval
21.53b
21.51c
13.86b
13.82c
6.58b
6.58c
Pasture
(
TX)
2.0
lbs
ae/
acre
­
1
application
84.89b
83.96c
49.78b
49.20c
22.99b
28.09c
Sorghum
(
TX)
0.50
lbs
ae/
acre­
2
applications
with
30
day
interval
8.79b
8.99c
4.92b
5.04c
2.57b
2.71c
Soybean
(
MS)
2.0
lbs
ae/
acre
­
1
application
33.29b
36.07c
20.22b
21.94c
9.77b
10.66c
Sugarcane
(
FL)
2.8
lbs
ae/
acre
­
1
application
170a
166b
91.61a
89.23b
41.03a
40.41c
Turf
(
PA)
2.0
lbs
ae/
acre
­
1
application
3.88b
8.05c
3.06b
6.49c
1.98b
4.18c
Wheat
(
TX)
1.0
lbs
ae/
acre
­
2
applications
with
30
day
interval
18.74b
19.09c
10.43b
10.59c
5.33b
5.66c
a
Surface
water
EECs
for
all
crop
scenarios
identified
in
Table
II.
d.
are
presented
in
Appendix
B.
Only
the
highest
EECs
for
each
crop
scenario
are
presented
in
Table
III.
b..
b
Ground
spray
application
modeled
using
PRZM
3.12/
EXAMS
2.98.
c
Aerial
spray
application
modeled
using
PRZM
3.12/
EXAMS
2.98.

3.
Measures
of
Terrestrial
Exposure
Terrestrial
Exposure
Modeling
For
birds
and
mammals,
dicamba
concentrations
on
food
items,
based
on
data
from
Hoerger
and
Kenaga
(
1972)
and
Fletcher
et
al.
(
1994),
are
predicted
using
a
first­
order
residue
decline
method.
EFEDs
T­
REX
(
Ver.
1.2.3)
model
predicts
maximum
and
mean
EECs
resulting
from
the
single
and
multiple
applications
of
dicamba.
Acute
and
Chronic
RQs
are
calculated
using
these
EECs
and
appropriate
toxicity
data.

Maximum
and
mean
EECs
calculated
by
T­
REX
are
presented
in
table
III.
b,
based
on
application
scenarios
represented
by
labels
for
sugarcane,
pasture,
soybean,
corn,
and
wheat.
These
models
were
performed
using
the
form
of
dicamba
(
dicamba
sodium
salt)
that
is
contained
in
the
formulation
that
is
applied
at
the
highest
rates.
More
comprehensive
43
modeling
based
on
labels
for
other
forms
of
dicamba
may
be
performed
in
later
refinements
of
this
assessment.
For
terrestrial
modeling,
EECs
are
presented
for
single
applications
only,
since
they
were
calculated
to
be
slightly
higher
than
EECs
for
multiple
applications.
Using
only
these
rates
to
calculate
RQs
did
not
alter
the
overall
conclusion
of
risk
that
would
be
calculated
using
multiple
rates.

Table
III.
b.
Maximum
and
Mean
Estimated
Environmental
Concentrations
(
EECs)
of
Dicamba
Acid
on
Food
Items
for
Terrestrial
Species
(
from
T­
REX)

Simulation
Scenario
Concentration
(
ppm)

Application
rate
(
lbs
ae/
A)
a
No.
of
Applications
Short
Grass
Tall
Grass
Broadleaf
plants/
Small
insects
Fruits/
Pods/
Seed
s/
Large
Insects
Maximum
EECs
2.8
1
672.00
308.00
378.00
42.00
2.0
1
480.00
220.00
270.00
30.00
1.0
1
240.00
110.00
135.00
15.00
0.75
1
180.00
82.50
101.25
11.25
Mean
EECs
2.8
1
238.00
100.80
126.00
19.60
2
1
170.00
72.00
90.00
14.00
1.0
1
85.00
36.00
45.00
7.00
0.75
1
63.75
27.00
33.75
5.25
aApplication
rates
are
associated
with
crops
as
follows:
2.8
lbs
ae/
A
for
sugarcane,
2.0
lbs
ae/
A
for
pasture
and
soybeans,
1.0
lbs
ae/
A
for
wheat,
0.75
lbs
ae/
A
for
corn
Effects
on
non­
target
terrestrial
plants
are
most
likely
to
occur
as
a
result
of
spray
drift
from
aerial
and
ground
spray
applications
of
liquid
formulations.
Spray
drift
is
an
important
factor
in
characterizing
the
risk
of
dicamba
to
non­
target
plants.
The
TerrPlant
(
Ver.
1.0)
model
predicts
EECs
for
terrestrial
plants
located
adjacent
to
the
treated
field.
Dicamba
applied
according
to
label
directions
as
a
liquid
spray
for
ground
or
aerial
spray
applications
may
impact
non­
target
plants
for
some
distance
from
the
application
site
depending
on
droplet
size,
wind
speed,
and
other
factors.
Several
of
the
dicamba
product
labels
specify
a
required
or
recommended
droplet
size
for
spray
applications
as
well
as
advisories
limiting
application
in
certain
weather
conditions.
Dicamba
applied
as
a
fine
or
medium
spray,
during
windy
conditions
or
when
temperatures
are
above
85
°
C
has
the
potential
to
damage
off­
target
plants.
Coarse
sprays
may
also
damage
non­
target
plants
through
drift,
but
generally
closer
to
the
treated
field.

C.
Ecological
Effects
Characterization
1.
Aquatic
Effects
Characterization
Freshwater
Fish,
Acute
44
Fish
toxicity
studies
for
two
freshwater
species
using
the
TGAI
are
required
to
establish
the
acute
toxicity
of
dicamba
acid
and
its
salts
to
fish.
The
preferred
test
species
are
rainbow
trout
(
a
coldwater
fish)
and
bluegill
sunfish
(
a
warmwater
fish).
A
compilation
of
the
acute
studies
from
EFED
databases
are
presented
in
Table
III.
c.
and
an
analysis
of
the
available
data
indicates
that
the
dicamba
salts
are
practically
non­
toxic
to
fish.
Results
of
the
studies
with
the
potassium
salt
are
questionable
due
to
precipitation
of
the
test
substance
during
testing.
It
appears
that
dicamba
acid
is
slightly
more
toxic
to
fish
than
the
dicamba
salts
with
rainbow
trout
LC
50
of
28
mg
ae/
L
and
bluegill
LC
50
>
50
mg
ae/
L.
The
guideline
requirement
(
72­
1)
for
acute
freshwater
fish
toxicity
is
fulfilled;
EFED
will
use
the
worst
case
value
(
LC
50
28
mg
ae/
L;
MRID
40098001)
for
evaluating
acute
toxic
exposure
to
freshwater
fish.

TABLE
III.
c.
Freshwater
Fish
Acute
Toxicity
for
Dicamba
Acid
and
Dicamba
Salts.

Species
%
ai
96­
hour
LC50
(
mg
ai/
L)
96­
hour
LC50
(
mg
ae/
L)
Toxicity
Category
MRID
No.
Author/
Year
Study
Classification
Dicamba
acid
Rainbow
trout
(
Oncorhynchus
mykiss)
86.8
135.4
135.4
Practically
non­
toxic
0041272
NA,
1977
Acceptable
Rainbow
trout
(
Oncorhynchus
mykiss)
10
153
153
Practically
non­
toxic
00036915
NA/
1974
Supplemental
Rainbow
trout
(
Oncorhynchus
mykiss)
88
28
28
Slightly
toxic
40098001
NA,
1986
Acceptable
Bluegill
sunfish
(
Lepomis
macrochirus)
86.8
135.3
135.3
Practically
non­
toxic
0034703
NA,
1977
Acceptable
Bluegill
sunfish
(
Lepomis
macrochirus)
88
>
50
>
50
Slightly
toxic
40098001
NA,
1986
Supplemental
Dimethylamine
salt
of
dicamba
Rainbow
trout
(
Oncorhynchus
mykiss)
48.3
1000
977
Practically
non­
toxic
263000
Griffen
&
Thompson
1981
Acceptable
Rainbow
trout
(
Oncorhynchus
mykiss)
11.5
1000
977
Practically
non­
toxic
46184
Thompson
et
al.
1980
Supplemental
Bluegill
sunfish
(
Lepomis
macrochirus)
48.2
1000
977
Practically
non­
toxic
22530
Sleight
1971
Supplemental
Bluegill
sunfish
(
Lepomis
macrochirus)
11.5
1000
977
Practically
non­
toxic
46183
Thompson
et
al.
1980
Supplemental
Sodium
salt
of
dicamba
Rainbow
trout
(
Oncorhynchus
mykiss)
22
558
507.2
Practically
non­
toxic
00029623
Bentley
1974
Supplemental
Bluegill
sunfish
(
Lepomis
macrochirus
22
706
642
Practically
non­
toxic
00022539
Bentley
1974
Supplemental
Potassium
salt
of
dicamba
TABLE
III.
c.
Freshwater
Fish
Acute
Toxicity
for
Dicamba
Acid
and
Dicamba
Salts.

Species
%
ai
96­
hour
LC50
(
mg
ai/
L)
96­
hour
LC50
(
mg
ae/
L)
Toxicity
Category
MRID
No.
Author/
Year
Study
Classification
45
Bluegill
sunfish
(
Lepomis
macrochirus
38
230
196
Practically
non­
toxic
258983
McAllister
et
al.
1985
Supplemental
Diglycoamine
salt
of
dicamba
Rainbow
trout
(
Oncorhynchus
mykiss)
40.15
>
400
>
270.8
Practically
non­
toxic
ACC263863
NA,
1986
Acceptable
Bluegill
sunfish
(
Lepomis
macrochirus
40.15
>
400
>
270.8
Practically
non­
toxic
ACC263863
NA,
1986
Acceptable
*
Conversion
from
active
ingredient
to
acid
equivalents
was
completed
in
accordance
with
conversion
factors
found
on
the
label
and
molecular
weight
differences.
The
LC50
values
from
the
toxicity
tests
were
converted
to
acid
equivalents
by
multiplying
the
value
times
factors
as
provided
in
Section
II.
B.

Freshwater
Invertebrates,
Acute
A
freshwater
aquatic
invertebrate
toxicity
test
using
the
TGAI
is
required
to
establish
the
toxicity
of
dicamba
acid
and
its
salts
to
aquatic
invertebrates.
The
preferred
test
species
is
Daphnia
magna.
A
compilation
of
the
acute
studies
from
EFED
databases
are
presented
in
Table
III.
d.
and
an
analysis
of
the
available
data
indicates
that
the
sodium
salt
of
dicamba
is
the
most
toxic
form
to
daphnids
with
an
acute
48­
hour
EC
50
value
of
34.6
mg
ae/
L
(
NOEL
=
16.4
mg
ae/
L;
MRID
00233292).
EFED
will
use
this
value
for
evaluating
acute
toxic
exposure
to
freshwater
invertebrates.
Dicamba
acid
and
the
other
dicamba
salts
were
practically
non­
toxic
to
daphnids
with
48­
hour
EC
50
values
ranging
from
>
100
­
1563
mg
ae/
L.
The
guideline
requirement
(
72­
2)
for
acute
freshwater
invertebrate
toxicity
is
fulfilled.
46
TABLE
III.
d.
Freshwater
Invertebrate
Acute
Toxicity
for
Dicamba
Acid
and
Dicamba
Salts.

Species
%
ai
48­
hour
EC50
(
mg
aiL)
48­
hour
EC50
(
mg
ae/
L)
Toxicity
category
MRID
No.
Author/
Year
Study
Classification
Dicamba
acid
Waterflea
(
Daphnia
magna)
86.8
110.7
110.7
Practically
non­
toxic
00521262
NA,
1977
Acceptable
Waterflea
(
Daphnia
magna)
88
>
100
>
100
Practically
non­
toxic
40094602
NA,
1980
Supplemental
Sowbug
(
Asellus
brevicauda)
88
>
100
>
100
Practically
non­
toxic
40098001
NA,
1986
Supplemental
Scud
(
Gammarus
fascia)
88
>
100
>
100
Practically
non­
toxic
40098001
NA,
1986
Supplemental
Dimethylamine
salt
of
dicamba
Waterflea
(
Daphnia
magna)
48.2
1600
1563
Practically
non­
toxic
00028283
Thompson
&
Forbis,
1979
Supplemental
Sodium
salt
of
dicamba
Waterflea
(
Daphnia
magna)
26.5
38.1
34.6
Slightly
toxic
00233292
Vilkas,
1977
Acceptable
Potassium
salt
of
dicamba
Waterflea
(
Daphnia
magna)
38
750
639.8
Practically
non­
toxic
258983
Forbis
et
al.,
1985
Supplemental
Diglycoamine
salt
of
dicamba
Waterflea
(
Daphnia
magna)
40.15
>
400
>
270.8
Practically
non­
toxic
ACC263863
NA,
1986
Supplemental
*
Conversion
from
active
ingredient
to
acid
equivalents
was
completed
in
accordance
with
conversion
factors
found
on
the
label
and
molecular
weight
differences.
The
LC50
values
from
the
toxicity
tests
were
converted
to
acid
equivalents
by
multiplying
the
value
times
factors
as
provided
in
Section
II.
B.

Freshwater
Fish
and
Invertebrate,
Chronic
No
data
available.
Studies
were
not
required.

Estuarine/
Marine
Fish,
Acute
Acute
toxicity
testing
with
estuarine/
marine
fish
using
the
TGAI
is
required
for
dicamba
acid
and
its
salts
because
the
end­
use
product
may
be
expected
to
reach
this
environment
due
to
its
potential
use
on
crops
with
significant
acreage
in
coastal
counties.
An
acute
flow­
through
toxicity
study
was
performed
with
the
sheepshead
minnow.
The
data
submitted
showed
that
dicamba
acid
is
practically
non­
toxic
to
estuarine/
marine
fish
on
an
acute
basis,
with
an
LC
50
of
>
180
mg
ae/
L.
The
guideline
(
72­
3a)
is
fulfilled
(
MRID
0025390).
47
Table
III.
e
Estuarine/
Marine
Fish
Acute
Toxicity
for
Dicamba
Acid.

Species/
Static
%
ai
96­
hour
LC50
(
mg
ae/
L)
Toxicity
Category
MRID
No.
Author/
Year
Study
Classification
Sheepshead
minnow
(
Crassostrea
virginianus)
86.8
>
180
Practically
non­
toxic
0025390
NA
,
1977
Acceptable
Estuarine
and
Marine
Invertebrates,
Acute
Acute
toxicity
testing
with
estuarine/
marine
invertebrates
using
the
TGAI
is
required
for
dicamba
acid
and
its
salts
because
the
end­
use
product
may
be
expected
to
reach
this
environment
due
to
its
potential
use
on
crops
with
significant
acreage
in
coastal
counties.
The
preferred
test
species
are
mysid
shrimp
and
eastern
oyster.
Data
from
Acceptable
studies
with
the
grass
shrimp
and
fiddler
crab
indicate
that
dicamba
acid
is
practically
non­
toxic
to
marine
invertebrates
with
96­
hr
EC
50
'
s
of
>
132
and
>
173
mg
ae/
L,
respectively.
Supplemental
studies
with
the
glass
shrimp
and
eastern
oyster
indicate
these
species
were
more
sensitive;
however,
the
studies
did
not
meet
guideline
requirements
and
Acceptable
studies
with
freshwater
invertebrates
will
be
used
to
assess
risk
to
aquatic
invertebrates.
The
data
requirements
(
72­
3b)
are
fulfilled
(
MRID
#
0034702;
MRID
0034704).

Table
III.
f
Estuarine/
Marine
Invertebrate
Acute
Toxicity
for
Dicamba
Acid.

Species/
Flow­
through
%
ai.
96­
hour
EC50
(
mg
ae/
L)
Toxicity
Category
MRID
No.
Author/
Year
Study
Classification
Grass
shrimp
(
Palaemonetes
pu)
86.2
>
132
Practically
nontoxic
0034702
NA,
1977
Acceptable
Fiddler
crab
(
Uca
pugilator)
86.8
>
173
Practically
nontoxic
0034704
NA,
1977
Acceptable
Glass
shrimp
(
Palaemonetes
ka)
88
>
56
Slightly
toxic
40098001
NA,
1986
Supplemental
Eastern
oyster
(
Crassostrea
virginica)
87
>
1.0
Moderately
toxic
40228401
NA,
1986
Supplemental
Estuarine
and
Marine
Fish
and
Invertebrates,
Chronic
No
data
available.
Studies
were
not
required.

Aquatic
Plants
Several
aquatic
plant
toxicity
studies
using
the
TGAI
are
required
to
establish
the
toxicity
of
dicamba
acid
to
non­
target
aquatic
plants.
The
recommendation
is
for
testing
of
five
species:
freshwater
duckweed
(
Lemna
gibba),
green
alga
(
Selenastrum
capricornutum),
blue­
green
algae
(
Anabaena
flos­
aquae),
marine
diatom
(
Skeletonema
costatum),
and
a
freshwater
diatom.
The
EC
50
for
the
freshwater
vascular
plant
(
duckweed)
is
>
3.25
mg
ae/
L,
based
on
reduced
frond
production.
Sublethal
effects
observed
in
the
duckweed
included
slight
chlorosis
and
curled
fronds.
Dicamba
acid
appears
to
be
more
toxic
to
non­
vascular
aquatic
plants
with
the
lowest
EC
50
for
blue­
green
algae
of
0.061
mg
ae/
L
(
NOEC
0.005
mg
ae/
L),
based
on
reduced
cell
density.
EFED
will
use
this
value
for
evaluating
toxic
exposure
to
48
aquatic
plants.
Studies
submitted
for
the
algal
species
indicate
that
the
blue­
green
algae
is
more
sensitive
to
dicamba
acid
than
the
green
algae
(
EC
50
>
3.7
mg
ae/
L).
The
marine
diatom
was
more
sensitive
to
dicamba
acid
than
the
freshwater
diatom
causing
reductions
in
cell
density
at
test
levels
as
low
as
0.033
mg
ae/
L.
Other
toxic
symptoms
observed
in
the
algal/
diatom
studies
included
cell
bloating,
fragmentation,
and
thin
walls.
The
guideline
requirements
(
122­
2
and
123­
2)
are
fulfilled
(
MRID
42774107;
MRID
42774108;
MRID
42774109;
MRID
42774110;
and
MRID
42774111)
for
the
five
required
species.

TABLE
III.
g.
Non­
target
Aquatic
Plant
Toxicity
for
Dicamba
Acid.

Species
[
Study
Type]
%
ai
EC50/
NOEC
(
mg
ae/
L)
Endpoints
Affected
MRID
No.
Author,
Year
Study
Classification
Duckweed
(
Lemna
gibba)
[
Tier
II]
89.5
>
3.25/
0.20
Frond
production
42774111
Hoberg,
1993
Acceptable
Green
Algae
(
Selenastrum
capricornutum)
[
Tier
I]
89.5
>
3.7/
3.7
Cell
density
42774107
Hoberg,
1993
Acceptable
Blue­
green
Algae
(
Anabaena
flos­
aquae)
[
Tier
II]
89.5
0.061/
0.005
Cell
density
42774109
Hoberg,
1993
Acceptable
Diatom
(
Navicula
pelliculosa)
[
Tier
II]
89.5
2.3/
0.50
Cell
density
42774108
Hoberg,
1993
Acceptable
Diatom
(
Skeletonema
costatum)
[
Tier
II]
89.5
0.493/
0.011
Cell
density
42774110
Hoberg,
1993
Acceptable
2.
Terrestrial
Effects
Characterization
Birds,
Acute
and
Subacute
An
oral
toxicity
study
using
the
technical
grade
of
the
active
ingredient
(
TGAI)
is
required
to
establish
the
acute
oral
toxicity
of
dicamba
acid
and
its
salts
to
terrestrial
birds.
The
preferred
guideline
test
species
is
either
mallard
duck
(
a
waterfowl)
or
bobwhite
quail
(
an
upland
gamebird).
The
data
that
were
submitted
indicate
that
dicamba
acid
is
categorized
as
moderately
toxic
to
avian
species
with
a
14­
day
oral
LD
50
for
bobwhite
quail
of
188
mg
ae/
kg
(
NOEL
=
13.6
mg
ae/
kg).
Observed
effects
included
reduction
in
body
weight
gain,
loss
of
coordination,
loss
of
righting
reflex,
lower
limb
weakness/
rigidity,
reduced
reaction
to
external
stimuli,
wing
droop,
ruffled
appearance,
lethargy,
shallow
and
rapid
respiration,
depression,
and
coma.
The
guideline
requirement
(
71­
1)
for
acute
oral
avian
toxicity
is
fulfilled;
EFED
will
use
the
worst
case
value
(
LD
50
188
mg
ae/
kg;
MRID
42774105)
for
evaluating
acute
oral
exposure
to
terrestrial
birds.
49
TABLE
III.
h.
Avian
Acute
Oral
Toxicity
for
Dicamba
Acid
and
Dicamba
Salts.

Species
%
ai
LD50
(
mg
ai/
kg)
LD50
(
mg
ae/
kg)
Toxicity
Category
MRID
No.
Author,
Year
Study
Classification
Dicamba
acid
Northern
bobwhite
quail
(
Colinus
virginianus)
86.9
188
188
Moderately
toxic
42774105
Campbell
et
al.,
1993
Acceptable
Mallard
duck
(
Anas
platyrhynchos)
86.9
1373
1373
Slightly
toxic
42774106
NA,
1993
Acceptable
Dimethylamine
salt
of
dicamba
Mallard
duck
(
Anas
platyrhynchos)
48.2
>
2510
>
2452
Practically
non­
toxic
00073275
Fink
et
al.,
1979
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
11.5
>
2510
>
2452
Practically
non­
toxic
00046180
Fink
et
al.,
1980
Supplemental
Potassium
salt
of
dicamba
Northern
bobwhite
quail
(
Colinus
virginianus)
38
724
618
Moderately
toxic
261466
Beavers,
1986
Supplemental
Diglycoamine
salt
of
dicamba
Northern
bobwhite
quail
(
Colinus
virginianus)
40
387
262
Moderately
toxic
ACC263863
NA,
1986
Acceptable
*
Conversion
from
active
ingredient
to
acid
equivalents
was
completed
in
accordance
with
conversion
factors
found
on
the
label
and
molecular
weight
differences.
The
LC50
values
from
the
toxicity
tests
were
converted
to
acid
equivalents
by
multiplying
the
value
times
factors
as
provided
in
Section
II.
B.

Two
dietary
studies
using
the
TGAI
are
required
to
establish
the
subacute
toxicity
of
dicamba
acid
and
its
salts
to
birds.
The
preferred
test
species
are
mallard
duck
and
bobwhite
quail.
Acceptable
data
submitted
for
dicama
acid
indicate
that
the
8­
day
acute
dietary
LC
50
for
both
species
was
>
10,000
mg
ae/
kg;
therefore,
dicamba
acid
is
categorized
as
practically
non­
toxic
to
avian
species
on
a
subacute
dietary
basis.
Data
available
from
studies
with
the
dicamba
salts
reported
LC
50
values
ranging
from
>
1522
to
>
9090
mg
ae/
kg.
The
guideline
(
71­
2)
is
fulfilled
(
MRID
00025391;
MRID
TOUDIC07).

TABLE
III.
i.
Avian
Subacute
Dietary
Studies
for
Dicamba
Acid
and
Dicamba
Salts.

Species
%
ai
LC50
(
mg
ai/
kg)
LC50
(
mg
ae/
kg)
Toxicity
Category
MRID
No.
Author,
Year
Study
Classification
Dicamba
acid
Northern
bobwhite
quail
(
Colinus
virginianus)
86.6
>
10,000
>
10,000
Practically
non­
toxic
00025391
NA,
1977
Acceptable
Northern
bobwhite
quail
(
Colinus
virginianus)
10
>
10,000
>
10,000
Practically
non­
toxic
00023690
NA,
1974
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
86.6
>
10,000
>
10,000
Practically
non­
toxic
TOUDIC07
NA,
1977
Acceptable
TABLE
III.
i.
Avian
Subacute
Dietary
Studies
for
Dicamba
Acid
and
Dicamba
Salts.

Species
%
ai
LC50
(
mg
ai/
kg)
LC50
(
mg
ae/
kg)
Toxicity
Category
MRID
No.
Author,
Year
Study
Classification
50
Mallard
duck
(
Anas
platyrhynchos)
86.6
2009
2009
Practically
non­
toxic
00025392
NA,
1977
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
10
>
10,000
>
10,000
Practically
non­
toxic
00025317
NA,
1974
Supplemental
Dimethylamine
salt
of
dicamba
Northern
bobwhite
quail
(
Colinus
virginianus)
48.2
>
4640
>
4533
Practically
non­
toxic
00034693
Fink
&
Reno,
1974
Supplemental
Northern
bobwhite
quail
(
Colinus
virginianus)
11.5
>
5620
>
5490
Practically
non­
toxic
00046182
Fink
et
al.,
1980
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
48.2
>
4640
>
4533
Practically
non­
toxic
00022527
Fink
&
Reno,
1974
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
11.5
>
5620
>
5490
Practically
non­
toxic
00046181
Fink
et
al.,
1980
Supplemental
Sodium
salt
of
dicamba
Northern
bobwhite
quail
(
Colinus
virginianus)
26.5
>
10,000
>
9090
Practically
non­
toxic
00233292
Fink,
1977
Acceptable
Northern
bobwhite
quail
(
Colinus
virginianus)
22
>
10,000
>
9090
Practically
non­
toxic
00025328
Fink,
1975
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
22
>
10,000
>
9090
Practically
non­
toxic
00030102
Fink,
1975
Supplemental
Potassium
salt
of
dicamba
Northern
bobwhite
quail
(
Colinus
virginianus)
38
>
5620
>
4794
Practically
non­
toxic
00261465
Beavers,
1985
Supplemental
Mallard
duck
(
Anas
platyrhynchos)
38
>
5620
>
4794
Practically
non­
toxic
00261466
Beavers,
1985
Supplemental
Diglycoamine
salt
of
dicamba
Northern
bobwhite
quail
(
Colinus
virginianus)
40
>
2248
>
1522
Slightly
toxic
ACC263863
NA,
1986
Acceptable
Mallard
duck
(
Anas
platyrhynchos)
40
>
2248
>
1522
Slightly
toxic
ACC263863
NA,
1986
Acceptable
*
Conversion
from
active
ingredient
to
acid
equivalents
was
completed
in
accordance
with
conversion
factors
found
on
the
label
and
molecular
weight
differences.
The
LC50
values
from
the
toxicity
tests
were
converted
to
acid
equivalents
by
multiplying
the
value
times
factors
as
provided
in
Section
II.
B.

Birds,
Chronic
Avian
reproduction
studies
using
the
TGAI
are
usually
required
for
pesticide
registration
because
birds
may
be
subject
to
repeated
or
continuous
exposure
to
the
pesticide,
especially
preceding
or
during
the
breeding
season.
The
preferred
test
species
are
mallard
duck
and
51
bobwhite
quail.
The
mallard
study
reported
a
reduction
in
hatchability
at
1390
ppm
ae
(
NOEC
=
695
ppm
ae);
however,
no
evidence
of
adverse
reproductive
effects
was
observed
in
bobwhite
quail
at
concentrations
of
1,390
ppm
ae.
The
guideline
(
71­
4)
is
fulfilled;
EFED
will
use
the
worst
case
value
(
NOEC
695
ppm
ae;
MRID
43814003)
for
evaluating
chronic
exposure
to
terrestrial
birds.

Table
III.
j.
Avian
Reproduction
for
Dicamba
Acid.

Species
%
ai
NOEC/
LOEC
(
ppm
ai)
NOEC/
LOEC
(
ppm
ae)
LOEC
Endpoints
MRID
No.
Author,
Year
Study
Classification
Northern
bobwhite
quail
(
Colinus
virginianus)
86.9
1600/­­
1390/­­
No
treatmentrelated
toxicity
43814004
Beavers
et
al.,
1994
Acceptable
Mallard
duck
(
Anas
platyrhynchos)
86.9
800/
1600
695/
1390
Reduction
in
hatchability
43814003
Beavers
et
al.,
1994
Acceptable
*
Conversion
from
active
ingredient
to
acid
equivalents
was
completed
in
accordance
with
conversion
factors
found
on
the
label
and
molecular
weight
differences.
The
LC50
values
from
the
toxicity
tests
were
converted
to
acid
equivalents
by
multiplying
the
value
times
factors
as
provided
in
Section
II.
B.

Mammals,
Acute
Wild
mammal
testing
is
required
on
a
case­
by­
case
basis,
depending
on
the
results
of
lower
tier
laboratory
mammalian
studies,
intended
use
pattern
and
pertinent
environmental
fate
characteristics.
In
most
cases,
rat
or
mouse
toxicity
values
obtained
from
the
Agency's
Health
Effects
Division
(
HED)
substitute
for
wild
mammal
testing.
These
toxicity
values
are
reported
below.

The
results
indicate
that
dicamba
acid
is
categorized
as
practically
non­
toxic
to
small
mammals
on
an
acute
oral
basis
(
LD
50
value
2,740
mg
ai/
kg/
day).
The
guideline
81­
1
is
fulfilled
(
MRID
00078444).

TABLE
III.
k.
Mammalian
Acute
Toxicity
for
Dicamba
acid.

Species
%
Purity
Test
Type
Toxicity
Affected
Endpoints
MRID
No.
Study
author
Classification
Rat
(
Rattus
norvegicus)
Tech
Acute
oral
LD50
=
2,740
mg/
kg/
day
Mortality
00078444
NA
Acceptable
Mammals,
Subchronic
and
Developmental/
Reproductive
In
a
2­
generation
reproduction
study
with
Sprague­
Dawley
rats,
systemic
neurotoxicity
was
observed
at
doses
of
419
mg
a.
i./
kg/
day
in
males
and
at
450
mg
a.
i./
kg/
day
in
females
and
developmental
effects
(
decreased
pup
growth)
were
observed
in
rats
at
a
dose
of
136
mg
a.
i./
kg/
day.
Developmental
studies
with
New
Zealand
white
rabbits
reported
irregular
52
ossification
of
internasal
bones
at
300
mg
a.
i./
kg/
day
and
maternal
toxicity
(
abortion
and
clinical
signs
of
toxicity,
including
ataxia,
rales,
and
decreased
motor
activity)
was
reported
at
150
mg
a.
i./
kg/
day.
Maternal
toxicity;
including
mortality,
clinical
signs
of
toxicity,
body
weight
changes,
and
decreased
food
consumption,
was
also
observed
in
Charles
River
CD
rats
at
400
mg
a.
i./
kg/
day.
In
addition,
sublethal
effects
in
subchronic
feeding
studies
(
13
weeks)
with
Charles
River
CD
rats
included
body
weight
changes
and
liver
effects
at
1000
mg
a.
i./
kg/
day.
The
guidelines
82­
1,
83­
3
and
83­
4
are
fulfilled
(
MRID
00128093,
MRID
00084024,
MRID
42429401,
and
MRID
43137101);
EFED
will
use
the
worst
case
value
(
NOAEL
45
mg
ai/
kg/
day,
MRID
43137101)
for
evaluating
chronic
exposure
to
terrestrial
mammals.

TABLE
III.
l.
Mammalian
Subchronic
and
Developmental/
Reproductive
Toxicity
for
Dicamba
acid.

Species
%
Purity
Test
Type
Toxicity
Affected
Endpoints
MRID
No.
Study
author
Classification
Rat
(
Charles
River
CD)
86.8
Subchronic
feeding
­
13
weeks
NOEL/
LOAEL
=
500/
1000
mg
ai/
kg/
day
body
weight
changes;
liver
effects
00128093
NA
Acceptable
Rat
(
Charles
River
CD)
85.8
Developmental
NOAEL/
LOAEL
=
160/
400
mg
ai/
kg/
day
NOAEL/
LOAEL=
>
400/­­
mg
ai/
kg/
day
Maternal
tox1
Developmental
00084024
NA
Acceptable
Rabbit
(
New
Zealand
White)
90.5
Developmental
NOAEL/
LOAEL
=
30/
150
mg
ai/
kg/
day
NOAEL/
LOAEL
=
150/
300
mg
ai/
kg/
day
Maternal
tox2
Developmental
42429401
NA
Acceptable
Rat
(
Sprague­
Dawley)
86.5
Reproduction
NOAEL/
LOAEL
=
males
­
122/
419
mg
ai/
kg/
day;
females
­
136/
450
mg
ai/
kg/
day
NOAEL/
LOAEL
=
45/
136
mg
ai/
kg/
day
NOAEL/
LOAEL
=
45/
136
mg
ai/
kg/
day
Systemic
tox3
Offspring
tox
Reproductive
43137101
Masters,
1993
Acceptableminimum
1
Maternal
toxicity
­
Mortality,
clinical
signs
of
neurotoxicity,
decreased
body
weight
gain
and
food
consumption.
Developmental
toxicity
­
No
treatment­
related
fetal
gross,
skeletal
or
visceral
anomalies.
2
Maternal
toxicity
­
Abortion,
clinical
signs
of
toxicity
(
ataxia,
rales,
decreased
motor
activity),
decreased
body
weight
gain
and
food
consumption.
Developmental
toxicity
­
Irregular
ossification
of
internasal
bones.
3Systemic
toxicity
­
Clinical
signs
of
neurotoxicity
in
dams
during
lactation
(
tense/
stiff
body
tone,
slow
righting
reflex),
significantly
increased
relative
liver
to
body
weight
ratios.
Offspring
toxicity
­
Significantly
decreased
pup
growth.
Developmental
toxicity
­
Decreased
pup
growth,
delayed
sexual
maturation
in
F1
males.

Insects,
Acute
Contact
A
honey
bee
acute
contact
study
using
the
TGAI
is
required
for
dicamba
acid
because
its
foliar
application
treatment
use
will
result
in
honey
bee
exposure.
The
acute
contact
LD
50
,
using
the
honey
bee,
Apis
mellifera,
is
an
acute
contact,
single­
dose
laboratory
study
designed
to
estimate
the
quantity
of
toxicant
required
to
cause
50%
mortality
in
a
test
population
of
bees.
The
48­
hour
acute
contact
LD
50
for
dicamba
acid
is
>
90.65
µ
g
ae/
bee
and
it
is,
therefore,
classified
as
practically
non­
toxic
to
bees
on
a
contact
exposure
basis
and
no
label
warning
is
needed.
The
guideline
(
141­
1)
is
fulfilled
(
MRID
00036935).
53
TABLE
III.
m.
Non­
target
Insects
­
Acute
Contact.

Species
%
ai
LD50
(
µ
g
ai/
bee)
Toxicity
Category
MRID
No.
Author/
Year
Study
Classification
Honey
Bee
(
Apis
mellifera)
Tech
>
90.65
Practically
non­
toxic
00036935
NA,
1975
Acceptable
Insects,
Residual
Contact
A
honey
bee
toxicity
of
residues
on
foliage
study
is
required
on
an
end­
use
product
for
any
pesticide
intended
for
outdoor
application
when
the
proposed
use
pattern
indicates
that
honey
bees
may
be
exposed
to
the
pesticide
and
when
the
formulation
contains
one
or
more
active
ingredients
having
an
acute
contact
honey
bee
LD
50
which
falls
in
the
moderately
toxic
or
highly
toxic
range.
The
purpose
of
this
guideline
study
is
to
develop
data
on
the
residual
toxicity
to
honey
bees.
Bee
mortality
determinations
are
made
from
bees
exposed
to
treated
foliage
harvested
at
various
time
periods
after
treatment.
No
residue
toxicity
study
was
submitted
by
the
registrant;
therefore,
the
guideline
(
141­
2)
was
not
fulfilled;
however,
the
acute
contact
honey
bee
LD
50
falls
in
the
relatively
non­
toxic
range.
In
addition,
no
field
tests
for
pollinators
were
submitted
by
the
registrant
(
guideline
141­
5).

Terrestrial
Plants
Terrestrial
Tier
II
studies
are
required
for
all
low
dose
pesticides
(
those
with
the
maximum
use
rate
of
0.5
lbs
ai/
A
or
less)
and
for
any
pesticide
showing
a
negative
response
equal
to
or
greater
than
25%
in
Tier
I
studies.
Tier
II
terrestrial
plant
toxicity
studies
were
conducted
to
establish
the
toxicity
of
dicamba
to
non­
target
terrestrial
plants.
The
recommendations
for
seedling
emergence
and
vegetative
vigor
studies
are
for
testing
of
(
1)
six
species
of
at
least
four
dicotyledonous
families,
one
species
of
which
is
soybean
(
Glycine
max)
and
the
second
of
which
is
a
root
crop,
and
(
2)
four
species
of
at
least
two
monocotyledonous
families,
one
of
which
is
corn
(
Zea
mays).

Results
of
Tier
II
toxicity
studies
with
monocots
and
dicots
indicate
that
seedling
emergence
and
vegetative
vigor
are
severely
impacted
by
exposure
to
dicamba
acid.
The
most
sensitive
monocot
tested
was
onion
(
EC
25
=
0.071
lb
ai/
A
­
seed
germination,
radicle
length;
EC
25
=
0.0044
lb
ai/
A
­
seedling
emergence,
shoot
length;
and
EC
25
=
0.1507
lb
ai/
A
­
vegetative
vigor,
shoot
weight).
The
most
sensitive
dicot
tested
was
soybean
(
EC
25
=
0.036
lb
ai/
A
­
seed
germination,
radicle
length;
EC
25
=
0.0027
lb
ai/
A
­
seedling
emergence,
shoot
length;
and
EC
25
=
0.0068
lb
ai/
A
­
vegetative
vigor,
shoot
length).
Non­
lethal
effects
included
brown
leaf
tips,
necrosis,
decrease
in
size,
leaf
curling,
chlorosis,
and
stem
tumors.
However,
the
studies
are
not
adequate
because
an
NOAEC
was
not
determined
for
the
most
sensitive
endpoints
in
either
study.
Studies
are
need
with
the
TEPs
for
all
forms
of
dicamba.
54
TABLE
III.
n.
Terrestrial
Non­
target
Plant
Toxicity.
a
Species
Seed
Germination
Seedling
Emergence
Vegetative
Vigor
Radicle
length
Shoot
length
Root
weight
Shoot
length
Shoot
weight
EC25
(
lb
ai/
A)
NOEC
(
lb
ai/
A)
EC25
(
lb
ai/
A)
NOEC
(
lb
ai/
A)
EC25
(
lbai/
A)
NOEC
(
lb
ai/
A)
EC25
(
lb
ai/
A)
NOEC
(
lb
ae/
A)
EC25
(
lb
ai/
A)
NOEC
(
lb
ae/
A)

Monocots
Corn
0.78
0.49
0.48
0.25
>
3.9
>
3.9
>
3.9
>
3.9
>
3.9
>
3.9
Oat
0.36
0.25
0.57
0.25
>
0.52
0.52
2.8
1.0
2.6
2.0
Onion
0.071
0.032
0.0044
<
0.032
0.062
<
0.13
0.81
0.26
0.15
0.13
Ryegrass
0.19
0.064
0.53
0.25
5.6
3.9
3.6
1.0
2.2
1.0
Dicots
Cabbage
0.28
0.13
1.5
0.53
0.16
0.13
>
0.5
0.5
0.16
0.13
Cucumber
0.053
0.062
0.42
0.25
0.017
0.016
0.045
0.031
0.052
0.031
Lettuce
0.12
<
0.032
0.074
0.13
0.096
0.031
0.021
0.016
0.029
0.016
Turnip
0.20
0.064
0.044
0.016
0.0085
0.00054
0.043
0.0047
0.017
0.0091
Soybean
0.036
<
0.032
0.0027
<
0.0022
>
0.025
0.25
0.0068
<
0.0040
0.13
0.031
Tomato
0.031
<
0.035
0.054
0.032
0.13
0.064
0.029
0.016
0.020
0.016
aMRID
42846301,
Study
author:
J.
R.
Hoberg,
1993.
55
IV.
RISK
CHARACTERIZATION
Risk
characterization
provides
the
final
step
in
the
risk
assessment
process.
In
this
step,
exposure
and
effects
characterization
are
integrated
to
provide
an
estimate
of
risk
relative
to
established
levels
of
concern
(
LOC).
The
results
are
then
interpreted
for
the
risk
manager
through
a
risk
description
and
synthesized
into
an
overall
conclusion.

A.
Risk
Estimation
­
Integration
of
Exposure
and
Effects
Data
A
deterministic
approach
is
used
to
evaluate
the
likelihood
of
adverse
ecological
effects
to
non­
target
species.
In
this
approach,
risk
quotients
(
RQs)
are
calculated
by
dividing
exposure
estimates
(
EECs)
by
ecotoxicity
values
for
non­
target
species,
both
acute
and
chronic.

RQ
=
EXPOSURE/
TOXICITY
RQs
are
then
compared
to
OPP's
levels
of
concern
(
LOCs).
These
LOCs
are
criteria
used
by
OPP
to
indicate
potential
risk
to
non­
target
organisms
and
the
need
to
consider
regulatory
action.
The
criteria
indicate
that
a
pesticide
used
as
directed
has
the
potential
to
cause
adverse
effects
on
non­
target
organisms.
LOCs
currently
address
the
following
risk
presumption
categories:
(
1)
acute
­
potential
for
acute
risk
is
high,
regulatory
action
may
be
warranted
in
addition
to
restricted
use
classification
(
2)
acute
restricted
use
­
the
potential
for
acute
risk
is
high,
but
this
may
be
mitigated
through
restricted
use
classification
(
3)
acute
listed
species
­
the
potential
for
acute
risk
to
listed
species
is
high,
regulatory
action
may
be
warranted,
and
(
4)
chronic
risk
­
the
potential
for
chronic
risk
is
high,
regulatory
action
may
be
warranted.
Currently,
EFED
does
not
perform
assessments
for
chronic
risk
to
plants,
acute
or
chronic
risks
to
non­
target
insects,
or
chronic
risk
from
granular/
bait
formulations
to
mammalian
or
avian
species.

The
ecotoxicity
test
values
(
i.
e.,
measurement
endpoints)
used
in
the
acute
and
chronic
risk
quotients
are
derived
from
the
results
of
required
studies.
Examples
of
ecotoxicity
values
derived
from
the
results
of
short­
term
laboratory
studies
that
assess
acute
effects
are:
(
1)
LC50
(
fish)
(
2)
LD50
(
birds
and
mammals)
(
3)
EC50
(
aquatic
plants
and
aquatic
invertebrates)
and
(
4)
EC25
(
terrestrial
plants).
An
example
of
a
toxicity
test
effect
level
derived
from
the
results
of
long­
term
laboratory
study
that
assesses
chronic
effects
is:
NOAEC
(
birds,
fish
and
aquatic
invertebrates).

Risk
presumptions,
along
with
the
corresponding
RQs
and
LOCs
are
tabulated
below:
56
TABLE
IV.
a.
Risk
Presumptions
for
Terrestrial
Animals
Risk
Presumption
RQ
LOC
Birds:

Acute
Risk
EEC1/
LC50
or
LD50/
sqft2
or
LD50/
day3
0.5
Acute
Restricted
Use
EEC/
LC50
or
LD50/
sqft
or
LD50/
day
(
or
LD50
<
50
mg/
kg)
0.2
Acute
Listed
Species
EEC/
LC50
or
LD50/
sqft
or
LD50/
day
0.1
Chronic
Risk
EEC/
NOAEC
1
Wild
Mammals:

Acute
Risk
EEC/
LC50
or
LD50/
sqft
or
LD50/
day
0.5
Acute
Restricted
Use
EEC/
LC50
or
LD50/
sqft
or
LD50/
day
(
or
LD50
<
50
mg/
kg)
0.2
Acute
Listed
Species
EEC/
LC50
or
LD50/
sqft
or
LD50/
day
0.1
Chronic
Risk
EEC/
NOAEC
1
1EEC=
abbreviation
for
Estimated
Environmental
Concentration
(
ppm)
on
avian/
mammalian
food
items
mg/
ft
mg
of
toxicant
consumed/
day
LD50
*
wt.
of
bird
LD50
*
wt.
of
bird
TABLE
IV.
b.
Risk
Presumptions
for
Aquatic
Animals
Risk
Presumption
RQ
LOC
Acute
Risk
EEC1/
LC50
or
EC50
0.5
Acute
Restricted
Use
EEC/
LC50
or
EC50
0.1
Acute
Listed
Species
EEC/
LC50
or
EC50
0.05
Chronic
Risk
EEC/
MATC
or
NOAEC
1
1
EEC
=
(
ppm
or
ppb)
in
water
TABLE
IV.
c.
Risk
Presumptions
for
Plants
Risk
Presumption
RQ
LOC
Terrestrial
and
Semi­
Aquatic
Plants:

Acute
Risk
EEC1/
EC25
1
Acute
Listed
Species
EEC/
EC05
or
NOAEC
1
Aquatic
Plants:

Acute
Risk
EEC2/
EC50
1
Acute
Listed
Species
EEC/
EC05
or
NOAEC
1
1
EEC
=
lbs
ai/
A
2
EEC
=
(
ppb/
ppm)
in
water
57
1.
Non­
target
Aquatic
Animals
and
Plants
Fish
and
Invertebrates
No
acute
or
chronic
LOCs
are
exceeded
for
either
freshwater
or
estuarine/
marine
fish
or
aquatic
invertebrates.
However,
the
oyster
toxicity
test
did
not
establish
an
EC
50
nor
establish
that
it
exceeds
100
ppm.
An
acute
oyster
study
is
needed
to
establish
the
toxicity
of
dicamba.

Aquatic
Plants
For
dicamba
acid
runoff/
drift
from
ground
and
aerial
spray
application
of
pasture
and
sugarcane,
the
non­
listed
Acute
Risk
LOC
for
the
freshwater
non­
vascular
plant
was
exceeded
(
Table
IV.
e.).
For
the
pasture
scenarios,
the
LOC
was
exceeded
for
the
Texas
scenario
only.
For
sugarcane,
the
LOC
was
exceeded
for
both
the
Florida
and
Louisiana
scenarios
(
Appendix
B).
However,
the
non­
listed
Acute
Risk
LOC
for
the
freshwater
non­
vascular
plant
was
not
exceeded
in
the
asparagus,
corn,
sorghum,
soybean,
turf
and
wheat
scenarios.
There
were
no
exceedances
of
the
non­
listed
freshwater
vascular
plant
LOC.
Likewise,
the
listed
freshwater
vascular
plant
LOC
was
not
exceeded
for
any
of
the
crop
scenarios
evaluated
(
Table
IV.
e.).
An
assessment
of
listed
risks
to
non­
vascular
aquatic
plants
is
not
required
since
there
are
no
listings
of
listed
non­
vascular
aquatic
plants
for
dicamba
at
this
time
TABLE
IV.
e.
Summarized
Acute
Aquatic
Plant
Risk
Quotients
for
Dicamba
Acid
a,
b,
c,
d
Scenario
Listed
freshwater
vascular
Non­
listed
Freshwater
vascular
Freshwater
non­
vascular
Michigan
asparagus
(
0.5
lbs
ae/
A)
Ground
app.
<
1
Aerial
app
.
<
1
<
1
<
1
<
1
<
1
Texas
corn
(
0.75
lbs
ae/
A)
Ground
app.
<
1
Aerial
app
.
<
1
<
1
<
1
<
1
<
1
Texas
pasture
(
2.0
lbs
ae/
A)
Ground
app.
<
1
Aerial
app.
<
1
<
1
<
1
1.39**
1.38**

Texas
sorghum
(
0.5
lbs
ae/
A)
Ground
app.
<
1
Aerial
app.
<
1
<
1
<
1
<
1
<
1
Mississippi
soybean
(
2.0
lbs
ae/
A)
Ground
app.
<
1
Aerial
app.
<
1
<
1
<
1
<
1
<
1
Florida
sugarcane
(
2.8
lbs
ae/
A)
Ground
app.
<
1
Aerial
app.
<
1
<
1
<
1
2.79**
2.72**

Pennsylvania
turf
(
2.0
lbs
ae/
A)
Ground
app.
<
1
Aerial
app.
<
1
<
1
<
1
<
1
<
1
North
Dakota
wheat
(
1.0
lbs
ae/
A)
Ground
app.
<
1
Aerial
app.
<
1
<
1
<
1
<
1
<
1
a
Detailed
calculations
of
aerial
and
ground
spray
PRZM
3.12/
EXAMS
2.98
modeling
are
provided
in
Appendix
B.
b*
indicates
an
exceedance
of
Listed
Species
Level
of
Concern
(
LOC);
RQ
>
1.0.
c**
indicates
an
exceedance
of
Acute
Risk
Level
of
Concern
(
LOC);
RQ>
1.0.
d
Listed
acute
toxicity
threshold
(
NOEC)
was
200
µ
g
ae/
L
for
freshwater
vascular;
acute
toxicity
thresholds
(
EC50)
were
3,250
and
61
µ
g
ae/
L
for
freshwater
vascular
and
freshwater
non­
vascular
(
blue
green
algae),
respectively.
58
2.
Non­
target
Terrestrial
Animals
For
assessment
of
dicamba
exposure
to
non­
target
terrestrial
birds,
mammals
and
plants,
four
application
scenarios
were
chosen
to
represent
typical
use
scenarios
(
Table
II.
c.).
The
four
application
scenarios
evaluated
were;
sugarcane
with
maximum
labeled
use
rate
of
2.8
lbs
ae/
acre;
hay,
pasture/
rangeland,
soybean
and
agricultural
fallowland
with
a
maximum
labeled
use
rate
of
2.0
lbs
ae/
acre;
agricultural
premises,
oats
and
wheat
with
a
maximum
labeled
use
rate
of
1.0
lbs
ae/
acre
and
corn
with
a
maximum
labeled
use
rate
of
0.75
lbs
ae/
acre.
Avian
and
terrestrial
mammal
EECs
were
modeled
for
each
of
the
four
scenarios
using
T­
REX
1.2.3
and
non­
target
terrestrial
plant
EECs
were
modeled
for
ground
and
aerial
spray
application
using
TerrPlant
1.0.
Risk
quotients
were
calculated
using
the
modeled
EECs
and
the
acute
and
chronic
toxicity
endpoints
in
Tables
IV.
f
and
IV.
g.,
respectively.

TABLE
IV.
f.
Summary
of
endpoints
for
Dicamba
acute
terrestrial
toxicity
studiesa
Organism
Group
Dicamba
Acid
MRID
#

bird
(
oral
dose),
LD50,
mg
ae/
kg­
bw
188
42774105
mammal,
LD50,
mg/
kg­
bw
2,740
00078444
terrestrial
monocots
emergence,
EC25,
lbs
ae/
A
0.0044
42846301
terrestrial
dicots
emergence,
EC25,
lbs
ae/
A
0.0027
42846301
terrestrial
monocots
vegetative
vigor,
EC25,
lbs
ae/
A
0.1507
42846301
terrestrial
dicots
vegetative
vigor,
EC25,
lbs
ae/
A
0.0068
42846301
a
Details
for
each
study
are
presented
in
earlier
sections
of
this
document
and
in
Appendix
.

TABLE
IV.
g.
Summary
of
endpoints
for
Dicamba
chronic
terrestrial
toxicity
studiesa
Organism
Group
Dicamba
Acid
MRID
#

bird,
NOEC
Mallard­
ppm
ae
695
43814003
mammal,
NOAEC,
mg
ai/
kg
bw/
day
Rat
45
43137101
a
Details
for
each
study
are
presented
in
earlier
sections
of
this
document
and
in
Appendix
.

Birds
Acute
avian
RQs
were
calculated
using
the
oral
gavage
study
with
bobwhite
quail
and
the
21­
day
oral
LD
50
value
of
>
188
mg/
kg
(
MRID
42774105).
Assuming
the
dicamba
application
rates
of
2.8
lbs
ae/
acre
and
2.0
lbs
ae/
acre
and
maximum
predicted
residue
levels,
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
were
exceeded
for
small
(
20g
and
100g)
birds
consuming
short
grass,
tall
grass
and
broadleaf
forage
and
small
insects
and
for
large
birds
(
1000g)
consuming
short
grass
(
Table
IV.
h).
The
Acute
Restricted
Use
LOC
and
Listed
Species
LOC
was
exceeded
for
small
(
20
g)
birds
consuming
fruits,
pods,
seeds
and
large
insects
and
large
59
birds
(
1000g)
consuming
tall
grass
and
broadleaf
forage
and
small
insects
with
the
100
g
bird
also
exceeding
the
Listed
Species
LOC
for
fruit,
pods,
seeds
and
large
insects.

For
mean
predicted
residues,
there
were
exceedances
of
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
for
the
20g
and
100g
bird
consuming
residues
on
short
grass,
the
20g
bird
consuming
tall
grass
and
broadleaf
forage
and
small
insects.
The
Acute
Restricted
Use
LOC
and
Listed
Species
LOC
were
exceeded
for
the
100
g
bird
consuming
the
mean
predicted
residues
on
tall
grass,
broadleaf
forage
and
small
insects
and
the
1000g
bird
consuming
short
grass.
The
Listed
Species
LOC
was
exceeded
for
the
20
g
bird
consuming
fruits,
pods,
seeds
and
large
insects
and
the
1000g
bird
exposed
to
tall
grass
and
small
insects;
however,
there
were
no
exceedances
for
the
100g
and
1000g
bird
consuming
the
mean
predicted
residue
on
fruits,
pods,
seeds
and
large
insects
(
Table
IV.
h.).

TABLE
IV.
h.
Avian
Acute
(
Dose­
based)
Risk
Quotient
Summary
a,
b,
c,
d,
e,
f
Food
type
Weight
class
(
g)
2.8
lbs
ae/
acre
2.0
lbs
ae/
acre
Acute
RQ
Acute
RQ
predicted
maximum
residues
predicted
mean
residues
predicted
maximum
residues
predicted
mean
residues
short
grass
20
5.65***
2.00***
4.04***
1.43***

100
2.53***
0.90***
1.81***
0.64***

1000
0.80***
0.28**
0.57***
0.20**

tall
grass
20
2.59***
0.85***
1.85***
0.61***

100
1.16***
0.38**
0.83***
0.27**

1000
0.37**
0.12*
0.26**
0.09
broadleaf
forage,
small
insects
20
3.18***
1.06***
2.27***
0.76***

100
1.42***
0.47**
1.02***
0.34**

1000
0.45**
0.15*
0.32**
0.11*

fruit,
pods,
seeds,
large
insects
20
0.35**
0.16*
0.25**
0.12*

100
0.16*
0.07
0.11*
0.05
1000
0.05
0.02
0.04
0.02
a
Acute
toxicity
threshold
was
LD50
=
188
mg
ae/
kg­
bw.
b
Detailed
calculations
for
Acute
RQs
and
input
and
output
for
T­
REX
Ver.
1.2.3
are
provided
in
Appendix
C.
c
RQs
in
this
table
were
calculated
for
the
maximum
labeled
application
rate
of
2.8
lbs
ae/
acre
for
sugarcane
and
2.0
lbs
ae/
acre
for
hay,
pasture/
rangeland,
soybean
and
agricultural
fallowland.
d
*
indicates
an
exceedance
of
Endangered
Species
Level
of
Concern
(
LOC);
RQ
>
0.10.
e**
indicates
an
exceedance
of
Acute
Restricted
Use
LOC;
RQ
>
0.20.
f***
indicates
an
exceedance
of
Acute
Risk
LOC;
RQ
>
0.50.

For
the
dicamba
application
rates
of
1.0
lbs
ae/
acre
and
0.75
lbs
ae/
acre
and
maximum
predicted
residue
levels,
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
were
exceeded
for
small
(
20g
and
100g)
birds
consuming
short
grass
and
broadleaf
forage
and
small
insects
and
the
20
g
bird
consuming
tall
grass
(
Table
IV.
i.)
The
Acute
Restricted
Use
LOC
and
Listed
Species
LOC
was
exceeded
for
the
100g
bird
consuming
tall
grass
and
the
1000g
bird
consuming
short
grass.
The
Listed
Species
LOC
was
exceeded
for
the
1000g
bird
consuming
tall
grass,
broadleaf
forage
and
small
insects
as
well
as
the
20g
bird
consuming
fruit,
pods,
seeds
and
60
large
insects
based
on
maximum
predicted
residues.
Based
on
mean
predicted
dicamba
residues,
the
20g
bird
exceeded
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
when
consuming
short
grass.
The
Acute
Restricted
Use
and
Listed
Species
LOC
were
exceeded
by
the100
g
bird
consuming
mean
residues
on
short
grass,
and
the
20
g
bird
consuming
tall
grass
and
broadleaf
forage
and
small
insects.
Likewise,
the
100g
bird
exceeded
the
Listed
Species
LOC
when
consuming
tall
grass,
broadleaf
forage
and
small
insects
based
on
the
mean
predicted
residues
(
Table
IV.
i).

TABLE
IV.
i.
Avian
Acute
(
Dose­
based)
Risk
Quotient
Summary
a,
b,
c,
d,
e,
f
Food
type
Weight
class
(
g)
1.0
lbs
ae/
acre
0.75
lbs
ae/
acre
Acute
RQ
Acute
RQ
predicted
maximum
residues
predicted
mean
residues
predicted
maximum
residues
predicted
mean
residues
short
grass
20
2.02***
0.72***
1.51***
0.54***

100
0.90***
0.32**
0.68***
0.24**

1000
0.29**
0.10
0.21**
0.08
tall
grass
20
0.92***
0.30**
0.69***
0.23**

100
0.41**
0.14*
0.31**
0.10*

1000
0.13*
0.04
0.10*
0.03
broadleaf
forage,
small
insects
20
1.14***
0.38**
0.85***
0.28**

100
0.51***
0.17*
0.38**
0.13*

1000
0.16*
0.05
0.12*
0.04
fruit,
pods,
seeds,
large
insects
20
0.13*
0.06
0.09*
0.04
100
0.06
0.03
0.04
0.02
1000
0.02
0.01
0.01
0.01
a
Acute
toxicity
threshold
was
LD50
=
188
mg
ae/
kg­
bwt.
b
Detailed
calculations
for
Acute
RQs
and
input
and
output
for
T­
REX
Ver.
1.2.3
are
provided
in
Appendix
C.
c
RQs
in
this
table
were
calculated
for
the
maximum
labeled
application
rate
of
1.0
lbs
ae/
acre
for
wheat
and
0.75
lbs
ae/
acre
for
corn.
d
*
indicates
an
exceedance
of
Listed
Species
Level
of
Concern
(
LOC);
RQ
>
0.10.
e**
indicates
an
exceedance
of
Acute
Restricted
Use
LOC;
RQ
>
0.20.
f***
indicates
an
exceedance
of
Acute
Risk
LOC;
RQ
>
0.50.

TABLE
IV.
j.
Avian
Chronic
(
Dietary­
based)
Risk
Quotient
Summary
a,
b,
c,
d
Food
type
2.8
lbs
ae/
acre
Chronic
RQ
predicted
maximum
residues
predicted
mean
residues
short
grass
0.97
0.34
tall
grass
0.44
0.15
broadleaf
forage,
small
insects
0.54
0.18
fruits,
pods,
large
insects
0.06
0.03
a
Chronic
toxicity
threshold
was
mallard
NOAEC
=
695
mg
ae/
kg­
diet.
b
Detailed
calculations
for
Chronic
RQs
and
input
and
output
for
T­
REX
Ver.
1.2.3
are
provided
in
Appendix
C.
c
RQs
in
this
table
were
calculated
for
the
maximum
labeled
application
rate
of
2.8
lbs
ae/
acre
for
sugarcane.
d*
Indicates
exceedance
of
chronic
risk
LOC;
RQ
>
1.0.
61
Table
IV.
j.
presents
the
avian
chronic
RQs
for
the
2.8
lbs
ae/
acre
application
rate
for
sugarcane.
Avian
chronic
LOCs
were
not
exceeded
for
all
food
items
for
all
weight
classes
of
birds
consuming
maximum
or
mean
predicted
dicamba
residues
on
food
items
based
on
the
mallard
NOEAC
of
695
ppm
ae
(
MRID
43814003).
Likewise,
there
were
no
exceedances
of
avian
chronic
LOCs
for
the
dicamba
application
rates
of
2.0,
1.0
and
0.75
lbs
ae/
acre
(
results
presented
in
Appendix
C).

Mammals
To
evaluate
the
acute
risk
to
mammals,
RQs
were
calculated
using
the
minimum
LD
50
obtained
from
the
acute
oral
studies
(
2,740
mg/
kg
bw
MRID
00078444)
and
the
maximum
labeled
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
as
previously
described.
To
evaluate
the
chronic
(
developmental/
reproductive)
risk
to
mammals,
RQs
were
calculated
using
the
rat
NOAEC
of
45
mg/
kg
bw/
day
(
MRID
43137101).
The
RQs
are
summarized
in
Tables
IV.
k.
and
IV.
l.
and
details
are
presented
in
Appendix
C.

Assuming
maximum
residue
levels
at
the
maximum
single
application
rate
for
sugarcane
(
2.8
lbs
ae/
acre),
there
were
was
one
exceedance
of
the
Acute
Listed
Species
LOC
for
the
20
g
mammal
consuming
short
grass
(
Table
IV.
k.)
For
all
other
food
types
and
weight
classes
(
15
g,
35
g,
and
1000g)
of
mammals
consuming
maximum
predicted
residues
on
short
grass,
tall
grass,
broadleaf
forage/
small
insects
and
seeds
the
Acute
Listed
Species,
Acute
Restricted
Use
and
Acute
Risk
LOCs
were
not
exceeded.
Likewise,
the
Acute
Listed
Species,
Acute
Restricted
Use
and
Acute
Risk
LOCs
were
not
exceeded
for
any
weight
class
of
mammal
consuming
the
mean
predicted
residues
(
Table
IV.
k.).

Evaluation
of
the
2.0,
1.0
and
0.75
lbs
ae/
acre
maximum
application
rates
for
acute
risk
to
mammals
indicates
no
exceedances
of
the
Acute
Listed
Species,
Acute
Restricted
Use
and
Acute
Risk
LOCs
for
any
weight
class
of
mammal
consuming
the
maximum
or
mean
predicted
residues
(
results
for
1.0
and
0.75
lbs
ae/
acre
application
rates
presented
in
Appendix
C).
62
TABLE
IV.
k.
Mammalian
Acute
(
Dose­
based)
Risk
Quotient
Summary
a,
b,
c,
d
Food
type
Weight
class
(
g)
2.8
lbs
ae/
acre
2.0
lbs
ae/
acre
Predicted
maximum
residues
Predicted
mean
residues
Predicted
maximum
residues
Predicted
mean
residues
short
grass
15
0.11*
0.04
0.08
0.03
35
0.09
0.03
0.07
0.02
1000
0.05
0.02
0.03
0.01
tall
grass
15
0.05
0.02
0.03
0.01
35
0.04
0.01
0.03
0.01
1000
0.02
0.01
0.02
0.01
broadleaf
forage,
small
insects
15
0.06
0.02
0.04
0.01
35
0.05
0.02
0.04
0.01
1000
0.03
0.01
0.02
0.01
fruit,
large
insects
15
0.01
<
0.01
<
0.01
<
0.01
35
0.01
<
0.01
<
0.01
<
0.01
1000
<
0.01
<
0.01
<
0.01
<
0.01
seeds,
pods
15
<
0.01
<
0.01
<
0.01
<
0.01
35
<
0.01
<
0.01
<
0.01
<
0.01
1000
<
0.01
<
0.01
<
0.01
<
0.01
a
Acute
toxicity
threshold
was
LD50
=
2,740
mg/
kg­
bwt.
b
Detailed
calculations
for
Acute
RQs
are
provided
in
Appendix
C
as
well
as
input
and
output
from
T­
REX
Ver.
1.2.3.
c
RQs
in
this
table
were
calculated
for
the
maximum
labeled
application
rate
of
2.8
lbs
ae/
acre
for
sugarcane
and
2.0
lbs
ae/
acre
for
hay,
pasture/
rangeland,
soybean
and
agricultural
fallowland.
d*
Indicates
exceedance
of
Acute
Listed
Species
LOC;
RQ
>
0.1.

For
chronic
risk
to
mammals,
the
Chronic
Risk
LOC
was
exceeded
for
mammals
consuming
maximum
and
mean
predicted
residues
on
short
grass
at
the
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
maximum
application
rates
(
Table
IV.
l.).
For
tall
grass,
broadleaf
forage
and
small
insects,
the
Chronic
risk
LOC
was
exceeded
for
mammals
consuming
maximum
residues
at
application
rates
of
2.8,
2.0,
and
1.0
lbs
ae/
acre.
There
were
no
exceedances
of
the
Chronic
Risk
LOC
for
mammals
consuming
the
maximum
residues
on
fruit,
pods
and
large
insects.
The
Chronic
Risk
LOC
was
exceeded
for
mean
residues
for
broadleaf
forage
and
small
insects
at
the
2.8
lbs
ae/
acre
application
rate.
63
Table
IV.
l.
Mammalian
Chronic
(
Dose­
based)
Risk
Quotients
a,
b,
c
Food
type
Weight
class
(
g)
2.8
lbs
ae/
acre
2.0
lbs
ae/
acre
1.0
lbs
ae/
acre
0.75
lbs
ae/
acre
predicted
residues
max.
mean
max.
mean
max.
mean
max.
mean
short
grass
15
6.48*
2.29*
4.63*
1.63*
2.31*
0.82
1.74*
0.61
35
5.53*
1.96*
3.95*
1.40*
1.98*
0.70
1.48*
0.53
1000
2.97*
1.03*
2.12*
0.74
1.06*
0.37
0.79
0.28
tall
grass
15
2.97*
0.97
2.12*
0.69
1.06*
0.35
0.80
0.26
35
2.54*
0.83
1.81*
0.59
0.91
0.30
0.68
0.22
1000
1.36*
0.44
0.97
0.31
0.49
0.16
0.36
0.12
broadleaf
forage,
small
insects
15
3.64*
1.21*
2.60*
0.86
1.30*
0.43
0.98
0.32
35
3.11*
1.04*
2.22*
0.74
1.11*
0.37
0.83
0.28
1000
1.67*
0.55
1.19*
0.39
0.60
0.20
0.45
0.15
fruit,
pods,
large
insects
15
0.40
0.19
0.29
0.13
0.14
0.07
0.11
0.05
35
0.35
0.16
0.25
0.12
0.12
0.06
0.09
0.04
1000
0.19
0.08
0.13
0.06
0.07
0.003
0.05
0.02
a
Chronic
toxicity
threshold
was
NOAEC
=
45
mg
ae/
kg
bw/
day.
b
Detailed
calculations
for
Chronic
RQs
and
input
and
output
from
T­
REX
Ver.
1.2.3
are
provided
in
Appendix
C.
c*
Indicates
exceedance
of
Chronic
Risk
LOC;
RQ>
1.0.

Terrestrial
Non­
Target
Insects
EFED
currently
does
not
quantify
risks
to
terrestrial
non­
target
insects;
therefore,
risk
quotients
are
not
calculated
for
these
organisms.
Risks
are
qualitatively
discussed
in
the
Terrestrial
Organism
Risk
Description
section
of
this
document.

3.
Non­
target
Terrestrial
and
Plants
in
Semi­
aquatic
Habitats
Table
IV.
m.
presents
RQs
for
terrestrial
plants
for
four
dicamba
application
rates
for
both
ground
and
aerial
spray
applications.
The
acute
risk
LOC
was
exceeded
for
non­
listed
monocots
and
dicots
located
adjacent
to
treated
areas
and
in
semi­
aquatic
areas
based
on
dicamba
maximum
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
as
the
result
of
ground
and
aerial
spray
application
(
Table
IV.
m.).
Spray
drift
from
ground
and
aerial
spray
application
resulted
in
exceedance
of
the
Acute
Risk
LOC
for
non­
listed
dicots
when
applied
at
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre.
Spray
drift
did
not
result
in
exceedance
of
the
acute
LOC
for
non­
listed
monocots.
The
terrestrial
plant
Acute
Listed
Species
LOC
was
exceeded
for
monocots
and
dicots
located
adjacent
to
treated
areas
and
in
semi­
aquatic
areas
based
on
dicamba
maximum
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
as
the
result
of
ground
and
aerial
spray
application
(
Table
IV.
m.).
Spray
drift
from
ground
and
aerial
spray
application
resulted
in
exceedance
of
the
Acute
Listed
LOC
for
dicots
based
on
dicamba
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre.
The
only
spray
drift
exceedance
of
the
Acute
Listed
LOC
for
monocots
was
as
the
result
of
exposure
when
applied
aerially
at
a
rate
of
2.8
lbs
ae/
acre.
64
Currently,
EFED
does
not
perform
chronic
risk
assessments
for
terrestrial
plants.
65
TABLE
IV.
m.
Summarized
Terrestrial
Plant
Acute
Risk
Quotients
a,
b,
c,
d,
e
Scenario
Acute
Non­
listed
RQs
Acute
Listed
RQs
Adjacent
to
treated
sites
Semi­
aquatic
areas
Drift
Adjacent
to
treated
sites
Semi­
aquatic
areas
Drift
Sugarcane
(
2.8
lbs
ae/
A)

Ground
spray
application
Monocot
3.96**
33.68**
0.19
5.25*
44.63*
0.22
Dicot
62.22**
528.89**
4.12**
76.36*
649.09*
7.00*

Aerial
spray
application
Monocot
5.28**
23.11**
0.93
7.00*
30.63*
1.08*

Dicot
82.96**
362.96**
20.59**
101.82*
445.45*
35.00*

Hay,
pasture/
rangeland,
soybean
and
agricultural
fallowland
(
2.0
lbs
ae/
A)

Ground
spray
application
Monocot
2.83**
24.06**
0.13
3.75*
31.88*
0.15
Dicot
44.44**
377.78**
2.94**
54.55*
463.64*
5.00*

Aerial
spray
application
Monocot
3.77**
16.51**
0.66
5.00*
21.88*
0.77
Dicot
59.26**
259.26**
14.71**
72.73*
318.18*
25.00*

Wheat
(
1.0
lbs
ae/
A)

Ground
spray
application
Monocot
1.42**
12.03**
0.07
1.88*
15.94*
0.08
Dicot
22.22**
188.89**
1.47**
27.27*
231.82*
2.50*

Aerial
spray
application
Monocot
1.89**
8.25**
0.33
2.50*
10.94*
0.38
Dicot
29.63**
129.63**
7.35**
36.36*
159.09*
12.50*

Corn
(
0.75lbs
as/
A)

Ground
spray
application
Monocot
1.06**
9.02**
0.05
1.41*
11.95*
0.06
Dicot
16.67**
141.67**
1.10**
20.45*
173.86*
1.88*

Aerial
spray
application
Monocot
1.42**
6.19**
0.25
1.88*
8.20*
0.29
Dicot
22.22**
97.22**
5.51**
27.27*
119.32*
9.38*

a
Detailed
calculations
for
Acute
RQs
and
TerrPlant
Ver.
1.0
input
and
output
are
provided
in
Appendix
D.
b
Acute
non­
listed
toxicity
thresholds
(
EC25)
were
0.0424,
0.0027,
0.1507,
and
0.0068
lb
ae/
acre
for
seedling
emergence
monocot,
seedling
emergence
dicot,
vegetative
vigor
monocot,
and
vegetative
vigor
dicot,
respectively.
c
Acute
listed
toxicity
thresholds
(
NOAEC/
EC05)
were
0.032,
0.0022,
0.13,
and
0.004
lb
ae/
acre
for
seedling
emergence
monocot,
seedling
emergence
dicot,
vegetative
vigor
monocot,
and
vegetative
vigor
dicot,
respectively.
d
*
indicates
an
exceedance
of
the
Listed
Species
Level
of
Concern;
RQ>
1.0.
e**
indicates
an
exceedance
of
the
Acute
Risk
LOC:
RQ>
1.0.

B.
Risk
Description
66
1.
Risks
to
Aquatic
Organisms:
In
the
conceptual
model,
spray
drift
and
surface
runoff/
leaching
to
adjacent
bodies
of
water
were
predicted
as
the
most
likely
sources
of
exposure
of
dicamba
and
the
salts
of
dicamba
to
nontarget
aquatic
organisms.
An
additional
predicted
source
of
potential
exposure
to
benthic
organisms
was
through
accumulated
residues
in
sediments.
Risks
to
aquatic
organisms
(
i.
e.
fish,
invertebrates,
and
plants)
were
assessed
based
on
modeled
Estimated
Environmental
Concentrations
(
EECs)
and
available
toxicity
data.
Aquatic
EECs
(
Table
III.
b)
for
the
ecological
exposure
to
dicamba
were
estimated
using
PRZM/
EXAMS
employing
the
standard
field
pond
scenario
for
each
crop
location
identified
in
Table
II.
d..

Fish
and
Invertebrates
Available
acute
toxicity
data
for
aquatic
species
indicate
that
dicamba
is
practically
non­
toxic
to
fish
and
invertebrates
with
LC
50
and
EC
50
values
for
fish
and
invertebrates
of
28
mg/
L
and
34.6
mg/
L,
respectively.
Acute
risk
quotients
of
<
0.01
(
Tables
IV.
d
and
e.,
respectively)
were
calculated
for
the
various
crop
scenarios
(
Table
II.
d.)
when
dicamba
is
applied
and
it
is
assumed
that
the
herbicide
reaches
the
surface
water
via
runoff
and
spray
drift
as
estimated
by
PRZM/
EXAMS
(
Table
III.
c.).
There
were
no
exceedances
of
the
aquatic
Acute
Risk,
Acute
Restricted
Use,
Listed
Species,
and
Chronic
Risk
LOCs
for
fish
and
invertebrates.
Consequently,
freshwater
fish
and
invertebrates
inhabiting
surface
waters
adjacent
to
a
dicamba
treated
field
would
not
be
at
risk
for
adverse
acute
effects
on
survival
when
exposed
to
dicamba
residues
in
surface
runoff
and
spray
drift
as
a
result
of
ground
and/
or
aerial
spray
application.
However,
there
are
no
chronic
studies
for
fish
and
invertebrates
thus
chronic
effects
to
survival,
growth
and
reproduction
of
fish
and
invertebrates
remains
an
uncertainty.
Likewise,
due
to
insufficient
toxicity
data,
risk
to
sediment­
dwelling
benthic
organisms
remains
an
uncertainty.

Aquatic
Plants
Toxicity
studies
indicate
that
dicamba
is
not
toxic
to
aquatic
vascular
plants
with
the
EC
50
for
the
freshwater
vascular
plant
(
duckweed)
of
3.25
mg/
L
(
NOEC
0.20
mg/
L)
based
on
inhibition
of
plant
growth
and
reduction
of
frond
count.
Toxicity
studies
with
blue­
green
algae
indicate
a
reduction
in
cell
density
at
dicamba
test
concentrations
as
low
as
0.008
mg/
L.
The
EC
50
for
the
freshwater
non­
vascular
plant
(
blue­
green
algae)
was
0.061mg/
L.

For
the
dicamba
use
scenarios
modeled
(
Table
II.
d.),
there
were
no
exceedances
of
the
nonlisted
Acute
Risk
LOC
for
freshwater
vascular
plants
(
Table
IV.
e.).
However,
the
LOCs
for
non­
listed
freshwater
non­
vascular
plants
(
blue­
green
algae)
were
exceeded
for
the
2.8
lbs
ae/
acre
and
2.0
lbs
ae/
acre
application
rates
to
crops
by
ground
and
aerial
spray
assuming
that
the
maximum
predicted
dicamba
concentrations
would
come
in
contact
with
freshwater
nonvascular
plants.
Consequently,
non­
listed
aquatic
non­
vascular
plants
inhabiting
surface
waters
adjacent
to
a
treated
field
would
be
at
risk
for
adverse
effects
to
growth
and
development
when
exposed
to
dicamba
as
a
result
of
the
labeled
uses
of
the
pesticide.
The
potential
risk
to
listed
aquatic
vascular
plants
will
be
discussed
in
greater
detail
in
Section
IV.
B.
4.

2.
Risks
to
Terrestrial
Organisms:
In
the
conceptual
model,
ground
deposition,
spray
drift,
root
uptake,
and
wind
erosion
of
soil
particles
with
resulting
residues
on
foliage
and
on
insects
67
and
seeds
are
the
most
likely
sources
of
dicamba
exposure
to
nontarget
terrestrial
organisms,
including
listed
species.
An
additional
predicted
source
of
exposure
to
dicamba
was
in
puddled
water
on
treated
fields
through
preening
and
grooming,
involving
the
oral
ingestion
of
material
from
the
feathers
or
fur.

Risks
to
terrestrial
organisms
(
i.
e.
birds,
mammals,
and
plants)
were
assessed
based
on
modeled
EECs
and
available
toxicity
data.
As
part
of
the
terrestrial
assessment,
EFED
modeled
exposure
concentrations
of
dicamba
to
nontarget
terrestrial
plants
and
animals
following
the
proposed
application
rates
for
various
crops
provided
by
the
registrant
(
Table
II.
d.).
For
terrestrial
birds
and
mammals,
estimates
of
initial
levels
of
dicamba
residues
on
various
food
items,
which
may
be
contacted
or
consumed
by
wildlife,
were
determined
using
the
Fletcher
nomogram
followed
by
a
first
order
decline
model
(
T­
REX
1.2.3).
Likewise,
the
TerrPlant
1.0
model
estimated
exposure
to
nontarget
plants.

Birds
Dicamba
salts
are
categorized
as
practically
non­
toxic
to
avian
species
based
on
dietary
studies.
However,
oral
gavage
studies
indicate
dicamba
acid
was
moderately
toxic
to
bobwhite
quail
(
21­
day
LD
50
188
mg/
kg)
and
slightly
toxic
to
mallard
ducks
(
NOEL
could
not
be
determined
due
to
signs
of
toxicity
at
all
test
levels).
Chronic
avian
studies
with
dicamba
acid
showed
a
reduction
in
hatchability
in
mallard
ducks
at
1390
ppm
a.
e.
(
NOAEC
=
695
a.
e.).

Based
on
the
oral
study
and
assuming
maximum
application
rates
of
2.8
and
2.0
lbs
ae/
acre
and
maximum
predicted
residue
levels
for
ground
spray
applications,
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
were
exceeded
for
small
(
20g
and
100g)
birds
consuming
short
grass,
tall
grass
and
broadleaf
forage
and
small
insects
and
for
large
birds
(
1000g)
consuming
short
grass
(
Table
IV.
h).
The
Acute
Restricted
Use
LOC
and
Listed
Species
LOC
was
exceeded
for
small
(
20
g)
birds
consuming
fruits,
pods,
seeds
and
large
insects
and
large
birds
(
1000g)
consuming
tall
grass
and
broadleaf
forage
and
small
insects
with
the
100
g
brid
also
exceeding
the
Listed
Species
LOC
for
these
food
items.

There
were
exceedances
of
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
for
the
20g
and
100g
bird
consuming
the
mean
predicted
residues
on
short
grass,
the
20g
bird
consuming
tall
grass
and
broadleaf
forage
and
small
insects.
The
Acute
Restricted
Use
LOC
and
Listed
Species
LOC
were
exceeded
for
the
100
g
bird
consuming
the
mean
predicted
residues
on
tall
grass,
broadleaf
forage
and
small
insects
and
the
1000g
bird
consuming
short
grass.
The
20
g
bird
consuming
the
mean
predicted
residue
on
fruits,
pods,
seeds
and
large
insects
exceeded
the
Listed
Species
LOC;
however,
there
were
no
exceedances
for
the
100g
and
1000g
bird
consuming
the
mean
predicted
residue
on
fruits,
pods,
seeds
and
large
insects
(
Table
IV.
h.).

For
the
dicamba
application
rates
of
1.0
lbs
ae/
acre
and
0.75
lbs
ae/
acre
and
maximum
predicted
residue
levels,
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
were
exceeded
for
small
(
20g
and
100g)
birds
consuming
short
grass
and
broadleaf
forage
and
small
insects
and
the
20
g
bird
consuming
tall
grass
(
Table
IV.
i.)
The
Acute
Restricted
Use
LOC
and
Listed
Species
LOC
was
exceeded
for
the
100g
bird
consuming
tall
grass
and
the
1000g
bird
consuming
short
grass.
The
Listed
Species
LOC
was
68
exceeded
for
the
1000g
bird
consuming
tall
grass,
broadleaf
forage
and
small
insects
as
well
as
the
20g
bird
consuming
fruit,
pods,
seeds
and
large
insects
based
on
maximum
predicted
residues.

Based
on
mean
predicted
dicamba
residues,
the
20g
bird
exceeded
the
Acute
Risk
LOC,
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
when
consuming
short
grass.
The
Acute
Restricted
Use
and
Listed
Species
LOC
were
exceeded
by
the100
g
bird
consuming
mean
residues
on
short
grass,
and
the
20
g
bird
consuming
tall
grass
and
broadleaf
forage
and
small
insects.
Likewise,
the
100g
bird
exceeded
the
Acute
Restricted
Use
LOC
and
the
Listed
Species
LOC
when
consuming
short
grass
and
the
Listed
Species
LOC
when
consuming
tall
grass,
broadleaf
forage
and
small
insects
based
on
the
mean
predicted
residues
(
Table
IV.
i).
The
potential
risk
to
listed
birds
(
20g,
100g
and
1000g)
will
be
discussed
in
greater
detail
in
Section
IV.
B.
4.

Based
on
an
NOAEC
of
695
mg
ai/
kg
for
mallard
duck
and
assuming
maximum
application
rates
(
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre),
the
Chronic
Risk
LOC
was
not
exceeded
(
Table
IV.
j.);
consequently,
birds
would
not
be
at
risk
from
chronic
developmental/
reproductive
effects
when
exposed
to
dicamba
as
a
result
of
the
labeled
uses
of
the
pesticide.

Mammals
Dicamba
acid
is
classified
as
practically
non­
toxic
to
small
mammals
on
an
acute
oral
basis
(
LD
50
value
of
>
2,740
mg/
kg
bw).
A
13­
week
subchronic
oral
study
in
rats
reported
body
weight
changes
and
liver
effects
at
1000
mg
a.
i./
kg/
day.
Developmental
studies
with
rabbits
reported
irregular
ossification
of
internasal
bones
at
300
mg
a.
i./
kg/
day
(
dicamba
acid,
90.5%
a.
i.)
and
maternal
toxicity
(
abortion
and
clinical
signs
of
toxicity,
including
ataxia,
rales,
and
decreased
motor
activity)
was
reported
at
150
mg
a.
i./
kg/
day.
Maternal
toxicity;
including
mortality,
clinical
signs
of
toxicity,
body
weight
changes,
and
decreased
food
consumption,
was
also
observed
in
rats
at
400
mg
a.
i./
kg/
day
(
dicamba
acid,
85.8%
a.
i.).
In
a
2­
generation
reproduction
study
with
rats
(
dicamba
acid,
86.5%
a.
i.),
maternal
neurotoxicity
was
observed
at
doses
of
419
mg
a.
i./
kg/
day
in
males
and
at
450
mg
a.
i./
kg/
day
in
females
and
developmental
effects,
decreased
pup
growth,
were
observed
in
rats
at
a
dose
of
136
mg
a.
i./
kg/
day;
consequently,
the
NOAEC
was
45
mg
a.
i./
kg­
diet
To
evaluate
the
acute
risk
to
mammals,
RQs
were
calculated
using
the
minimum
LD
50
obtained
from
the
acute
oral
studies
(
2,740
mg/
kg
bw
MRID
00078444)
and
the
maximum
labeled
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
as
previously
described.
To
evaluate
the
chronic
(
developmental/
reproductive)
risk
to
mammals,
RQs
were
calculated
using
the
rat
NOAEC
of
45
mg/
kg­
diet
(
MRID
43137101).

Assuming
maximum
residue
levels
at
the
maximum
application
rate
for
sugarcane
(
2.8
lbs
ae/
acre),
there
were
was
one
exceedance
of
the
Acute
Listed
Species
LOC
for
the
20
g
mammal
consuming
short
grass
(
Table
IV.
k.)
For
all
other
food
types
and
weight
classes
(
15
g,
35
g,
and
1000g)
of
mammals
consuming
maximum
predicted
residues
on
short
grass,
tall
grass,
broadleaf
forage/
small
insects
and
seeds
the
Acute
Listed
Species,
Acute
Restricted
Use
and
Acute
Risk
LOCs
were
not
exceeded.
Likewise,
the
Acute
Listed
Species,
Acute
Restricted
Use
and
Acute
Risk
LOCs
were
not
exceeded
for
any
weight
class
of
mammal
consuming
the
mean
predicted
residues
(
Table
IV.
k.).
Furthermore,
evaluation
of
the
2.0,
1.0
69
and
0.75
lbs
ae/
acre
application
rates
for
acute
risk
to
mammals
indicates
no
exceedances
of
the
Acute
Listed
Species,
Acute
Restricted
Use
and
Acute
Risk
LOCs
for
any
weight
class
of
mammal
consuming
the
maximum
or
mean
predicted
dicamba
residues
on
food
items.

Based
on
the
rat
NOEAC
of
45
mg/
kg­
diet,
the
Chronic
Risk
LOC
was
exceeded
for
mammals
consuming
maximum
and
mean
predicted
dicamba
residues
on
short
grass
at
the
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
maximum
application
rates
(
Table
IV.
l.).
For
tall
grass,
broadleaf
forage
and
small
insects,
the
Chronic
Risk
LOC
was
exceeded
for
mammals
consuming
maximum
residues
at
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre.
There
were
no
exceedances
of
the
Chronic
Risk
LOC
for
mammals
consuming
the
maximum
residues
on
fruit,
seeds,
pods
and
large
insects
(
Table
IV.
l).
As
a
result,
mammals
could
be
at
risk
for
developmental/
reproductive
effects
or
direct
effects
on
foraging
behavior
when
chronically
exposed
to
dicamba
as
a
result
of
the
labeled
uses
of
the
herbicide.

Terrestrial
Non­
target
Insects
EFED
currently
does
not
quantify
risks
to
terrestrial
non­
target
insects.
Risk
quotients
are
therefore
not
calculated
for
these
organisms.
Since,
dicamba
is
classified
as
practically
nontoxic
to
bees
on
a
contact
exposure
basis
(
LD
50
>
90.65
µ
g/
bee);
the
potential
for
dicamba
to
have
adverse
effects
on
pollinators
and
other
beneficial
insects
is
low.
Therefore,
the
label
does
not
need
a
warning
for
honey
bees.

Terrestrial
and
Semi­
aquatic
Plants
Results
of
Tier
II
toxicity
studies
with
monocots
and
dicots
indicate
that
seedling
emergence
and
vegetative
vigor
are
impacted
by
exposure
to
dicamba
acid.
Seedling
emergence,
based
on
weight,
was
adversely
impacted
in
monocots
(
onion)
at
an
EC
25
of
0.0044
lb
ae/
A
and
in
dicots
(
soybean)
with
an
EC
25
of
0.0027
lb
ae/
A.
Vegetative
vigor
in
monocots,
based
on
weight,
was
adversely
impacted
by
dicamba
acid
at
an
EC
25
of
0.1507
lb
ae/
A
in
onion
and
0.0068
lb
ae/
A
in
soybean,
respectively.
The
observed
effects
to
monocots
and
dicots
included
stunting,
chlorosis,
and
plant
death.

Based
on
the
toxicity
data
presented
above,
the
results
indicate
that
for
the
crop
scenarios
evaluated
and
the
application
rates
of
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre
the
Acute
Risk
LOC
(
with
the
exception
of
monocots
as
the
result
of
drift)
and
the
Listed
Species
LOC
were
exceeded
for
monocots
and
dicots
located
adjacent
to
treated
areas,
in
semi­
aquatic
areas
and
as
a
result
of
spray
drift
(
Table
IV.
m).
For
the
application
rates
evaluated
(
2.8,
2.0,
1.0
and
0.75
lbs
ae/
acre),
both
ground
and
aerial
spray
application
resulted
in
exccedance
of
the
Acute
Risk
LOC
and
Listed
Species
LOC.
The
potential
risk
to
listed
non­
target
terrestrial
and
semi­
aquatic
plant
species
will
be
discussed
in
greater
detail
in
Section
IV.
B.
4.

Spray
drift
is
also
an
important
factor
in
characterizing
the
risk
of
dicamba
to
non­
target
plants.
In
comparison,
the
terrestrial
plant
RQs
when
aerial
application
is
used
are
greater
than
RQs
from
ground
spray
application.
Spray
drift
exposure
from
ground
spray
application
is
assumed
to
be
1%
of
the
application
rate
and
the
EECs
and
RQs
were
calculated
using
EFED's
TerrPlant.
xls
model
(
Version
1.0).
Therefore,
EFED's
TerrPlant
model
can
be
interpreted
to
represent
exposure
to
non­
target
terrestrial
plants
in
either
of
two
ways.
First,
TerrPlant
estimates
the
exposure
to
drift
from
ground
spray
at
a
distance
of
25
ft
from
the
edge
of
the
field.
Distances
closer
to
the
field
than
25
ft
would
have
an
exposure
higher
than
70
modeled
by
TerrPlant
and
distances
farther
than
25
ft
from
the
field
would
have
an
exposure
lower
than
the
modeled
values.
A
second
interpretation
is
that
TerrPlant
models
the
average
exposure
across
a
swath
175
feet
wide
starting
at
the
edge
of
the
field.
Within
this
swath,
the
exposure
is
higher
close
to
the
edge
of
the
field
than
it
is
at
distances
further
from
the
field.
Likewise,
spray
drift
exposure
from
aerial
application
is
assumed
to
be
5%
of
the
application
rate
using
EFED's
TerrPlant.
xls
model
(
Version
1.0)
for
calculating
EECs
and
RQs.

The
results
of
this
screening
risk
assessment
indicate
that
dicamba
use
on
cropped
areas
applied
at
the
labeled
concentration
rates
as
a
liquid
spray
for
ground
or
aerial
applications
presents
a
risk
to
non­
target
plants
for
some
distance
from
the
application
site.
Exposure
will
depend
on
droplet
size,
wind
speed,
and
other
factors.
Spray
drift
from
coarse
sprays
would
be
expected
to
damage
non­
target
plants
that
are
closer
to
the
target
site;
whereas,
finer
sprays
have
the
potential
to
travel
greater
distances.
Dicamba
acid
and
its'
salts
in
formulated
TEPs
is
readily
absorbed
through
the
foliage
and
roots
of
plants;
consequently,
it
could
be
injurious
to
non­
target
plant
species
by
drift,
runoff,
or
leaching
to
roots.
Damage
to
nontarget
plants
may
be
sufficient
to
prevent
the
plant
from
competing
successfully
with
other
plants
for
resources
and
water.
Dicamba
may
accumulate
in
the
soil
with
frequent
or
extensive
use
which
may
result
in
damage
to
trees,
shrubs,
or
other
ornamentals.
Residuals
of
dicamba
in
soil
have
been
shown
to
reduce
emergence
in
sugarbeet
and
cause
petiole
epinasty,
severe
stunting
of
seedlings,
and
trumpeting
(
Dexter
et
al,
1994).
Listed
plant
species
may
be
especially
impacted
by
exposure
to
dicamba
because
of
the
impact
of
the
loss
of
a
few
individuals
to
the
population.
Low­
level
exposure
to
non­
target
crops
can
cause
severe
reductions
in
yield.
Numerous
cases
of
soybean
injury
are
reported
yearly
from
the
use
of
dicamba
on
corn
that
results
in
the
exposure
of
adjacent
fields
of
soybean
to
dicamba
through
spray
drift
and
volatilization
(
Proost
and
Boerboom
2004;
Hartzler
2003).
Injury
includes
leaf
malformations,
terminal
bud
kill,
and
delayed
maturity.
Yield
loss
can
occur
if
soybeans
are
exposed
to
dicamba
after
they
bloom
(
in
the
reproductive
stage).

The
results
of
this
screening
risk
assessment
indicate
that
direct
effects
to
plant
species
could
present
an
indirect
risk
at
the
higher
levels
of
organization
(
i.
e.
population,
trophic
level,
community,
ecosystem).
Field
studies
are
not
available
to
quantify
actual
risk
to
plant
and
animal
communities
in
forest/
edge
and
wetland/
riparian
habitats.
However,
in
terrestrial
and
shallow­
water
aquatic
communities,
plants
are
the
primary
producers
upon
which
the
succeeding
trophic
levels
depend.
If
the
available
plant
material
is
impacted
due
to
the
effects
of
dicamba
and
the
salts
of
dicamba,
this
may
have
negative
effects
not
only
on
the
herbivores,
but
throughout
the
food
chain.
Also,
depending
on
the
severity
of
impacts
to
the
plant
communities
[
i.
e.,
forests,
wetlands,
ecotones
(
edge
and
riparian
habitats)],
community
assemblages
and
ecosystem
stability
may
be
altered
(
i.
e.
reduced
bird
populations
in
edge
habitats;
reduced
riparian
vegetation
resulting
in
increased
light
penetration
and
temperature
in
aquatic
habitats,
loss
of
cover
and
food
for
fish).
In
addition,
allochthonous
input
from
riparian
vegetation
is
not
only
a
significant
component
of
the
food
supply
for
aquatic
herbivores
and
detritivores
but
also
provides
habitat
(
i.
e.
leaf
packs,
materials
for
casebuilding
for
invertebrates).

3.
Review
of
Incident
Data:
FIFRA
6(
a)(
2)
incident
data
add
lines
of
evidence
to
provide
evidence
that
the
risk
predictions
from
the
screening
level
assessment
are
substantiated
with
71
actual
effects
in
the
field.
Incident
data
for
dicamba
and
dicamba
salts
is
summarized
below.
There
was
no
incident
data
reported
for
the
isopropylamine
salt
of
dicamba.

Dicamba:
Thirty­
five
incidents
resulting
from
dicamba
use
have
been
recorded
in
the
Ecological
Incident
Information
System
(
EIIS)
as
of
June
1,
2005.
Incidents
reported
include
terrestrial,
plants,
and
aquatic
impacts.
There
was
a
single
terrestrial
impact
in
Utah
involving
the
mortality
of
several
horses
and
dogs
as
well
as
numerous
squirrels
and
chipmunks
as
a
result
of
the
spray
application
of
dicamba.
Impacts
to
plants
included
a
wide
range
of
crops
(
soybeans,
corn,
wheat)
as
well
as
non­
agricultural
application.
The
specific
impacts
varied
from
browning
and
plant
damage
to
mortality
of
all
plants
within
the
treated
area.
Aquatic
impacts
consist
of
2
fish
kill
incidents
associated
with
agricultural
and
residential
turf
application.

Dicamba
Sodium
Salt:
Fifteen
incidents
resulting
from
dicamba,
sodium
salt
use
have
been
recorded
in
the
EIIS
as
of
June
1,
2005.
All
reported
incidents
reported
where
associated
with
plant
damage
to
crops
including
sorghum,
soybean,
corn,
and
sugar
beets.

Dicamba
Dimethylamine
Salt:
Forty­
six
incidents
resulting
from
dicamba,
dimethylamine
salt
use
have
been
recorded
in
the
EIIS
as
of
June
1,
2005.
Incidents
reported
include
plant
and
aquatic
impacts.
The
majority
(
40/
45)
of
impacts
to
plants
where
associated
with
residential
turf
application
and
ranged
from
browning
to
mortality.
Agricultural
application
resulted
in
plant
damage
to
cotton,
corn
and
soybeans.
The
single
reported
aquatic
incident
was
a
fish
kill
of
unknown
magnitude
resulting
from
turf
application.

Dicamba
Potassium
Salt:
Three
incidents
resulting
from
dicamba,
potassium
salt
use
have
been
recorded
in
the
EIIS
as
of
June
1,
2005.
There
were
2
incidents
reported
of
impacts
to
plants,
both
associated
with
application
on
corn
resulting
in
plant
damage.
The
sole
aquatic
impact
was
associated
with
agricultural
application
which
resulted
in
the
mortality
of
2000
Perch.

Dicamba
Diglycoamine
Salt:
Two
incidents
resulting
from
dicamba,
diglycoamine
salt
use
have
been
recorded
in
the
EIIS
as
of
June
1,
2005.
Both
incidents
were
associated
with
impacts
to
plants
(
soybeans)
which
resulted
in
plant
damage.

4.
Federally
Listed
Species
Concerns
Action
Area
For
listed
species
assessment
purposes,
the
action
area
is
considered
to
be
the
area
affected
directly
or
indirectly
by
the
Federal
action
and
not
merely
the
immediate
area
involved
in
the
action.
At
the
initial
screening­
level,
this
risk
assessment
considers
broadly
described
taxonomic
groups
and
so
conservatively
assumes
that
listed
species
within
those
broad
groups
are
collocated
with
the
pesticide
treatment
area.
This
means
that
terrestrial
plants
and
wildlife
are
assumed
to
be
located
on
or
adjacent
to
the
treated
site
and
aquatic
organisms
are
assumed
to
be
located
in
a
surface
water
body
adjacent
to
the
treated
site.
This
assessment
also
assumes
that
the
listed
species
are
located
within
an
assumed
area
which
has
the
relatively
highest
potential
exposure
to
the
pesticide,
and
that
exposures
are
likely
to
decrease
with
72
distance
from
the
treatment
area.
Section
II.
A.
4.
of
this
risk
assessment
presents
the
pesticide
use
sites
that
are
used
to
establish
initial
collocation
of
species
with
treatment
areas.
If
the
assumptions
associated
with
the
screening­
level
action
area
result
in
RQs
that
are
below
the
listed
species
LOCs,
a
"
no
effect"
determination
conclusion
is
made
with
respect
to
listed
species
in
that
taxa,
and
no
further
refinement
of
the
action
area
is
necessary.
Consequently,
for
this
risk
assessment
for
dicamba,
a
"
no
effect"
determination
can
be
made
for
listed
species
of
fish,
aquatic
invertebrates,
and
vascular
aquatic
plants;
since
the
acute
risk
RQs
for
these
taxonomic
groups
did
not
exceed
the
Listed
Species
LOCs.
Furthermore,
RQs
below
the
listed
species
LOCs
for
a
given
taxonomic
group
indicate
no
concern
for
indirect
effects
upon
listed
species
that
depend
upon
the
taxonomic
group
covered
by
the
RQ
as
a
resource.
However,
in
situations
where
the
screening
assumptions
lead
to
RQs
in
excess
of
the
listed
species
LOCs
for
a
given
taxonomic
group,
a
potential
for
a
"
may
affect"
conclusion
exists
and
may
be
associated
with
direct
effects
on
listed
species
belonging
to
that
taxonomic
group
or
may
extend
to
indirect
effects
upon
listed
species
that
depend
upon
that
taxonomic
group
as
a
resource.
In
such
cases,
additional
information
on
the
biology
of
listed
species,
the
locations
of
these
species,
and
the
locations
of
use
sites
and
could
be
considered
along
with
available
information
on
the
fate
and
transport
properties
of
the
pesticide
to
determine
the
extent
to
which
screening
assumptions
regarding
an
action
area
apply
to
a
particular
listed
organism.
These
subsequent
refinement
steps
could
consider
how
this
information
would
impact
the
action
area
for
a
particular
listed
organism
and
may
potentially
include
areas
of
exposure
that
are
downwind
and
downstream
of
the
pesticide
use
site.
73
Taxonomic
Groups
Potentially
at
Risk
The
preliminary
risk
assessment
for
listed
species
indicates
that
dicamba
exceeds
the
Listed
Species
LOCs
for
the
specified
use
scenario
for
the
following
taxonomic
groups:

°
small
birds
(
20
and
100
g)
feeding
on
short
grasses,
tall
grasses,
and
broadleaf
forage/
small
insects
at
all
application
rates
and
maximum
and
mean
predicted
residue
levels
°
small
birds
(
20
g)
feeding
on
fruit,
pods,
seeds/
large
insects
at
all
application
rates
and
maximum
predicted
residue
levels
°
small
birds
(
20
g)
feeding
on
fruit,
pods,
seeds/
large
insects
at
2.8
and
2.0
lbs
ae/
acre
and
mean
predicted
residue
levels
°
small
birds
(
100
g)
feeding
on
fruit,
pods,
seeds/
large
insects
at
2.8
and
2.0
lbs
ae/
acre
and
maximum
predicted
residue
levels
°
large
birds
(
1000
g)
feeding
on
short
grasses,
tall
grasses,
and
broadleaf
forage/
small
insects
at
all
application
rates
and
maximum
predicted
residue
levels
°
large
birds
(
1000
g)
feeding
on
short
grasses,
tall
grasses,
and
broadleaf
forage/
small
insects
at
2.8
lbs
ae/
acre
and
mean
predicted
residue
levels
°
large
birds
(
1000
g)
feeding
on
short
grasses
and
broadleaf
forage/
small
insects
at
2.0
lbs
ae/
acre
and
mean
predicted
residue
levels
°
small
(
15
g)
mammals
feeding
on
short
grasses
at
2.8
lbs
ae/
acre
and
maximum
predicted
residue
levels
°
non­
target
terrestrial
plants
­
monocots
and
dicots
adjacent
to
treated
areas
and
in
semiaquatic
areas
at
all
application
rates
(
all
uses
modeled)
by
ground
and
aerial
spray
application;
dicots
in
spray
drift
at
all
application
rates
(
all
uses
modeled)
by
ground
and
aerial
spray
application;
monocots
in
spray
drift
at
2.8
lbs
ae/
acre
by
aerial
spray
application.

Discussion
of
Risk
Quotients:
The
Agency's
LOC
for
listed
birds,
mammals,
and
non­
target
terrestrial
plants
is
exceeded
for
the
use
of
dicamba
as
outlined
in
previous
sections.
Should
estimated
exposure
levels
occur
in
proximity
to
listed
resources,
the
available
screening
level
information
suggests
a
potential
concern
for
direct
effects
on
listed
species
within
these
taxonomic
groups
listed
above
associated
with
the
use
of
dicamba
as
described
in
Section
II.
A.
4.
The
registrant
must
provide
information
on
the
proximity
of
Federally
listed
small
and
large
birds,
small
mammals,
and
non­
target
terrestrial
plants
to
the
dicamba
use
sites.
This
requirement
may
be
satisfied
in
one
of
three
ways:
1)
having
membership
in
the
FIFRA
Listed
Species
Task
Force
(
Pesticide
Registration
[
PR]
Notice
2000­
2);
2)
citing
FIFRA
Listed
Species
Task
Force
data;
or
3)
independently
producing
these
data,
provided
the
information
is
of
sufficient
quality
to
meet
FIFRA
requirements.
The
information
will
be
used
by
the
OPP
Listed
Species
Protection
Program
to
develop
recommendations
to
avoid
adverse
effects
to
listed
species.

Probit
Dose
Response
Relationship:
A
probit
dose
response
analysis
was
performed
based
on
toxicity
studies
for
daphnids,
northern
bobwhite,
rats,
and
rainbow
trout.
It
is
recognized
that
extrapolation
of
very
low
probability
events
is
associated
with
considerable
uncertainty
in
the
resulting
estimates.
Based
on
an
assumption
of
a
probit
dose
relationship
with
the
mean
estimated
slope
of
5.546,
the
corresponding
estimated
chance
of
individual
mortality
associated
with
the
listed
species
LOC
of
0.05,
the
acute
toxic
endpoint
for
daphnia
are
1
in
74
3.72E+
12.
Based
on
an
assumption
of
a
probit
dose
relationship
with
the
mean
estimated
slope
of
6,
the
corresponding
estimated
chance
of
individual
mortality
associated
with
the
listed
species
LOC
of
0.1,
the
acute
toxic
endpoint
for
northern
bobwhite
is
1
in
1.01E+
9.
Based
on
an
assumption
of
a
probit
dose
relationship
with
the
default
estimated
slope
of
4.5,
the
corresponding
estimated
chance
of
individual
mortality
associated
with
the
listed
species
LOC
of
0.05,
the
acute
toxic
endpoint
for
rainbow
trout
is
1
in
4.17E+
8.
Based
on
an
assumption
of
a
probit
dose
relationship
with
the
default
estimated
slope
of
4.5
the
corresponding
estimated
chance
of
individual
mortality
associated
with
the
listed
species
LOC
of
0.1,
the
acute
toxic
endpoint
for
rat
is
1
in
2.94
E+
05.

Data
Related
to
Under­
represented
Taxa:
Additional
effects
data
from
other
analyzed
sources
(
ECOTOX
Database,
PAN
Database)
include
and/
or
support
guideline
study
data
for
dicamba
and
its
salts
and
therefore,
do
not
suggest
that
a
given
suite
of
listed
taxa
may
be
more
or
less
sensitive
than
suggested
by
the
effects
data
used
for
RQ
calculations.

Implications
of
Sublethal
Effects:
Chronic
studies
were
available
for
both
upland
game
birds
and
waterfowl
and
for
mammals.
RQs
did
exceed
Chronic
LOCs
for
mammals
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
at
all
application
rates
modeled
and
maximum
predicted
residue
levels
and
at
2.8,
2.0,
and
1.0
lbs
ae/
acre
and
mean
predicted
residue
levels;
and
for
consumption
of
short
grasses
at
1.0
and
0.75
lbs
ae/
acre
and
mean
predicted
residue
levels.
In
a
2­
generation
reproduction
study
with
Sprague­
Dawley
rats
(
dicamba
acid,
86.5%
a.
i.;
MRID
43137101),
maternal
neurotoxicity
was
observed
at
doses
of
419
mg
a.
i./
kg/
day
in
males
and
at
450
mg
a.
i./
kg/
day
in
females
and
developmental
effects
(
decreased
pup
growth)
were
observed
in
rats
at
a
dose
of
136
mg
a.
i./
kg/
day.
Developmental
studies
with
New
Zealand
white
rabbits
reported
irregular
ossification
of
internasal
bones
at
300
mg
a.
i./
kg/
day
(
dicamba
acid,
90.5%
a.
i.;
MRID
42429401)
and
maternal
toxicity
(
abortion
and
clinical
signs
of
toxicity,
including
ataxia,
rales,
and
decreased
motor
activity)
was
reported
at
150
mg
a.
i./
kg/
day.
Maternal
toxicity;
including
mortality,
clinical
signs
of
toxicity,
body
weight
changes,
and
decreased
food
consumption,
was
also
observed
in
Charles
River
CD
rats
at
400
mg
a.
i./
kg/
day
(
dicamba
acid,
85.8%
a.
i.;
MRID
00084024).
In
addition,
sublethal
effects
in
subchronic
feeding
studies
(
13
weeks)
with
Charles
River
CD
rats
included
body
weight
changes
and
liver
effects
at
1000
mg
a.
i./
kg/
day.
The
reproductive
and
developmental
effects
observed
in
these
studies
may
lead
to
a
potential
concern
for
impacts
to
populations
of
mammals
consuming
feed
items
contaminated
with
dicamba
and
to
the
predators
that
feed
on
them.

Indirect
Effects
Analysis
The
Acute
Use
and
Acute
Restricted
Use
LOCs
were
exceeded
for
all
weight­
classes
of
birds
(
20,
100,
1000
g)
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for
small
birds
(
20
g)
consuming
fruit,
pods,
seeds,
and
large
insects
at
the
higher
application
rates
(
2.8
and
2.0
lbs
ae/
acre)
and
maximum
predicted
residues.
In
addition,
the
Acute
Use
and
Acute
Restricted
Use
LOCs
were
exceeded
for
20
and
100
g
birds
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for
large
birds
(
1000
g)
consuming
short
grasses
at
the
lower
application
rates
(
1.0
and
0.75
lbs
ae/
acre)
and
maximum
predicted
residues.
For
mean
predicted
residues,
the
Acute
Use
and
Acute
Restricted
Use
LOCs
were
exceeded
for
small
birds
(
20
and
100
g)
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for
large
birds
(
1000
g)
consuming
short
grasses
at
the
higher
75
application
rates
(
2.8
and
2.0
lbs
ae/
acre).
In
addition
for
mean
predicted
residues,
the
Acute
Use
and/
or
Acute
Restricted
Use
LOCs
were
exceeded
for
20
g
birds
consuming
short
grasses,
tall
grasses
and
broadleaf
forage/
small
insects
and
for100
g
birds
consuming
short
grasses
at
the
lower
application
rates
(
1.0
and
0.75
lbs
ae/
acre).
Consequently,
there
may
be
a
concern
for
potential
indirect
effects
to
listed
species
dependent
upon
birds
for
food,
pollination
or
seed
dispersal,
or
habitat.

The
Acute
Non­
listed
and
Listed
Species
LOCs
were
exceeded
for
non­
target
monocots
and
dicots
adjacent
to
treated
areas
and
in
semi­
aquatic
areas
at
all
application
rates
(
2.8,
2.0.
1.0
and
.075
lbs
ae/
acre)
by
ground
and
aerial
spray
application;
for
dicots
in
spray
drift
at
all
application
rates
by
ground
and
aerial
spray
application;
and
monocots
in
spray
drift
at
2.8
lbs
ae/
acre
by
aerial
spray
application.
The
guideline
terrestrial
plant
studies
indicate
that
dicamba
negatively
impacts
seed
germination
(
radicle
length),
seedling
emergence
(
shoot
length),
and
vegetative
vigor
(
shoot
weight)
in
monocots
and
dicots.
Non­
lethal
effects
included
brown
leaf
tips,
necrosis,
decrease
in
size,
leaf
curling,
chlorosis,
and
stem
tumors.
Dicamba
acid
and
its'salts
in
formulated
TEPs
are
readily
absorbed
through
the
foliage
and
roots
of
plants;
consequently,
it
could
be
injurious
to
non­
target
plant
species
by
drift,
runoff,
or
leaching
to
roots.
Damage
to
non­
target
plants
may
be
sufficient
to
prevent
the
plant
from
competing
successfully
with
other
plants
for
resources
and
water.
Listed
plant
species
may
be
especially
impacted
by
exposure
to
dicamba
because
of
the
impact
of
the
loss
of
a
few
individuals
to
the
population.
Consequently,
there
is
a
potential
concern
for
listed
species
with
either
broad
or
narrow
dependencies
on
impacted
plant
species/
populations/
communities
for
habitat,
feeding
or
cover
requirements.
In
terrestrial
and
shallow­
water
aquatic
communities,
plants
are
the
primary
producers
upon
which
the
succeeding
trophic
levels
depend.
If
the
available
plant
material
is
impacted
due
to
the
effects
of
dicamba
and
the
salts
of
dicamba,
this
may
have
negative
effects
not
only
on
the
herbivores,
but
throughout
the
food
chain.
Also,
depending
on
the
severity
of
impacts
to
the
plant
communities
[
i.
e.,
forests,
wetlands,
ecotones
(
edge
and
riparian
habitats)],
community
assemblages
and
ecosystem
stability
may
be
altered
(
i.
e.
reduced
bird
populations
in
edge
habitats;
reduced
riparian
vegetation
resulting
in
increased
light
penetration
and
temperature
in
aquatic
habitats,
loss
of
cover
and
food
for
fish).

Critical
Habitat
In
the
evaluation
of
pesticide
effects
on
designated
critical
habitat,
consideration
is
given
to
the
physical
and
biological
features
(
constituent
elements)
of
a
critical
habitat
identified
by
the
U.
S
Fish
and
Wildlife
and
National
Marine
Fisheries
Services
as
essential
to
the
conservation
of
a
listed
species
and
which
may
require
special
management
considerations
or
protection.
The
evaluation
of
impacts
for
a
screening
level
pesticide
risk
assessment
focuses
on
the
biological
features
that
are
constituent
elements
and
is
accomplished
using
the
screening­
level
taxonomic
analysis
(
risk
quotients,
RQs)
and
listed
species
levels
of
concern
(
LOCs)
that
are
used
to
evaluate
direct
and
indirect
effects
to
listed
organisms.

The
screening­
level
risk
assessment
has
identified
potential
concerns
for
indirect
effects
on
listed
species
for
those
organisms
dependant
upon
birds,
small
mammals,
and
terrestrial
and
semi­
aquatic
plants.
In
light
of
the
potential
for
indirect
effects,
the
next
step
for
EPA
and
the
Service(
s)
is
to
identify
which
listed
species
and
critical
habitat
are
potentially
implicated.
Analytically,
the
identification
of
such
species
and
critical
habitat
can
occur
in
either
of
two
ways.
First,
the
agencies
could
determine
whether
the
action
area
overlaps
critical
habitat
or
76
the
occupied
range
of
any
listed
species.
If
so,
EPA
would
examine
whether
the
pesticide's
potential
impacts
on
non­
listed
species
would
affect
the
listed
species
indirectly
or
directly
affect
a
constituent
element
of
the
critical
habitat.
Alternatively,
the
agencies
could
determine
which
listed
species
depend
on
biological
resources,
or
have
constituent
elements
that
fall
into,
the
taxa
that
may
be
directly
or
indirectly
impacted
by
the
pesticide.
Then
EPA
would
determine
whether
use
of
the
pesticide
overlaps
the
critical
habitat
or
the
occupied
range
of
those
listed
species.
At
present,
the
information
reviewed
by
EPA
does
not
permit
use
of
either
analytical
approach
to
make
a
definitive
identification
of
species
that
are
potentially
impacted
indirectly
or
critical
habitats
that
is
potentially
impacted
directly
by
the
use
of
the
pesticide.
EPA
and
the
Service(
s)
are
working
together
to
conduct
the
necessary
analysis.

This
screening­
level
risk
assessment
for
critical
habitat
provides
a
listing
of
potential
biological
features
that,
if
they
are
constituent
elements
of
one
or
more
critical
habitats,
would
be
of
potential
concern.
These
correspond
to
the
taxa
identified
above
as
being
of
potential
concern
for
indirect
effects
and
include
the
following:
birds,
small
mammals,
and
terrestrial
and
semiaquatic
plants.
This
list
should
serve
as
an
initial
step
in
problem
formulation
for
further
assessment
of
critical
habitat
impacts
outlined
above,
should
additional
work
be
necessary
Co­
occurrence
Analysis
Since
the
Listed
Species
LOCs
for
birds,
small
mammals,
and
terrestrial
monocots
and
dicots
are
exceeded
for
the
use
of
dicamba,
the
LOCATES
was
run
for
all
taxonomic
groups.
For
terrestrial
monocots
and
dicots,
both
the
Acute
Risk
LOCs
for
non­
listed
species
and
the
Listed
Species
LOCs
were
exceeded;
consequently
a
potential
concern
arises
for
species
with
both
narrow
(
i.
e.,
species
that
are
obligates
or
have
very
specific
habitat
or
feeding
requirements)
and
general
dependencies
(
i.
e.,
cover
type
requirements).
Information
from
LOCATES,
as
presented
in
Table
IV.
n.
below,
indicates
that
for
the
corn,
wheat,
sugarcane
and
pasture/
grazing
uses,
several
potentially
affected
species
of
birds,
mammals,
reptiles
and
plants
appear
to
be
co­
located
with
pesticide
use
areas.
Consequently,
there
may
be
a
concern
for
potential
indirect
effects
to
listed
species
dependent
upon
birds
that
consume
feed
items
(
short
and
tall
grasses;
broadleaf
plants;
small
and/
or
large
insects;
and
fruits,
seeds,
and
pods)
contaminated
with
dicamba
residues;
such
as
predatory
birds
and
mammals.
In
addition,
there
may
be
a
potential
concern
for
indirect
effects
related
to
plants
that
require
birds
and/
or
mammals
for
pollination
or
seed
dispersal
and
for
animals
that
use
burrows
for
shelter
or
breeding
habitat.
Results
of
this
risk
assessment
indicate
no
risk
to
freshwater
fish
and
invertebrates
and
vascular
aquatic
plants;
consequently,
these
species
are
not
discussed
here.

TABLE
IV.
n.
Summarized
Data
from
LOCATES
#
Affected
Taxa
by
State
for
Corn*,
Wheat,
Sugarcane,
Pasture
and
Grazing
#
Affected
Taxa
by
State
for
Corn*

Affected
States
Birds
Mammals
Reptiles
Plants
Birds
Mammals
Reptiles
Plants
77
Alabama
4
4
5
17
4
4
5
17
Arizona
8
8
2
18
8
8
2
18
Arkansas
3
3
0
4
3
3
0
4
California
16
23
8
176
15
22
8
160
Colorado
3
2
0
13
3
2
0
9
Connecticut
3
2
0
2
3
2
0
2
Delaware
2
2
0
2
2
2
0
2
Florida
9
11
10
53
9
10
9
48
Georgia
5
5
2
20
5
5
2
20
Hawaii
32
2
2
268
26
2
2
231
Idaho
2
4
0
3
2
4
0
3
Illinois
3
2
0
8
3
2
0
8
Indiana
3
2
1
2
3
2
1
2
Iowa
3
1
0
6
3
1
0
6
Kansas
4
2
0
2
4
2
0
2
Kentucky
3
3
0
10
3
3
0
10
Louisiana
6
2
3
2
6
2
2
2
Maine
3
2
0
3
3
2
0
3
Maryland
2
3
0
6
2
3
0
6
Massachusetts
3
2
1
3
3
2
1
3
Michigan
3
2
1
7
3
2
1
7
Minnesota
2
1
0
4
2
1
0
4
Mississippi
6
1
2
2
5
1
5
2
Missouri
3
2
0
8
3
2
0
8
Montana
4
3
0
2
4
3
0
2
Nebraska
4
1
0
3
4
1
0
3
Nevada
2
0
1
9
2
0
1
9
New
Hampshire
1
1
0
2
1
1
0
2
New
Jersey
3
2
0
5
3
2
0
5
New
Mexico
6
5
1
13
6
5
1
13
New
York
3
2
0
6
3
2
0
6
North
Carolina
5
6
1
27
5
6
1
27
North
Dakota
4
0
0
1
4
0
0
1
Ohio
2
1
2
4
2
1
2
4
78
Oklahoma
7
3
0
2
7
3
0
2
Oregon
5
1
0
13
5
1
0
9
Pennsylvania
2
2
0
2
2
2
0
2
Rhode
Island
1
2
0
2
1
2
0
2
South
Carolina
4
3
2
19
4
3
2
19
South
Dakota
4
1
0
1
4
1
0
1
Tennessee
3
4
0
19
3
4
0
19
Texas
12
5
3
27
12
5
3
23
Utah
2
2
1
24
2
2
1
24
Vermont
1
1
0
2
1
1
0
2
Virginia
3
6
1
13
3
6
1
13
Washington
5
5
0
6
5
4
0
6
West
Virginia
1
5
0
5
1
5
0
5
Wisconsin
3
1
0
6
3
1
0
6
Wyoming
1
4
0
2
1
4
0
2
*
Corn
use
includes
corn
for
grain
(
acres),
corn
for
silage
or
greenchop
(
acres),
popcorn
(
pounds,
shelled),
sweet
corn,
sweet
corn
for
seed
(
pounds)

5.
Endocrine
Disrupter
EPA
is
required
under
the
FFDCA,
as
amended
by
FQPA,
to
develop
a
screening
program
to
determine
whether
certain
substances
(
including
all
pesticide
active
and
other
ingredients)
"
may
have
an
effect
in
humans
that
is
similar
to
an
effect
produced
by
a
naturally
occurring
estrogen,
or
other
such
endocrine
effects
as
the
Administrator
may
designate."
Following
the
recommendations
of
its
Endocrine
Disruptor
Screening
and
Testing
Advisory
Committee
(
EDSTAC),
EPA
determined
that
there
was
scientific
bases
for
including,
as
part
of
the
program,
the
androgen
and
thyroid
hormone
systems,
in
addition
to
the
estrogen
hormone
system.
EPA
also
adopted
EDSTAC's
recommendation
that
the
Program
include
evaluations
of
potential
effects
in
wildlife.
For
pesticide
chemicals,
EPA
will
use
FIFRA
and,
to
the
extent
that
effects
in
wildlife
may
help
determine
whether
a
substance
may
have
an
effect
in
humans,
FFDCA
authority
to
require
the
wildlife
evaluations.
As
the
science
develops
and
resources
allow,
screening
of
additional
hormone
systems
may
be
added
to
the
Endocrine
Disruptor
Screening
Program
(
EDSP).
When
the
appropriate
screening
and/
or
testing
protocols
being
considered
under
the
Agency's
EDSP
have
been
developed,
dicamba
and
its
salts
may
be
subjected
to
additional
screening
and/
or
testing
to
better
characterize
effects
related
to
endocrine
disruption.
79
C.
Description
of
Assumptions,
Limitations,
Uncertainties,
Strengths
and
Data
Gaps
Uncertainties,
assumptions,
and
limitations
associated
with
models
Extrapolating
the
risk
conclusions
from
the
standard
pond
scenario
modeled
by
PRZM/
EXAMS
may
either
underestimate
or
overestimate
the
potential
risks.
Major
uncertainties
with
the
standard
runoff
scenario
are
associated
with
the
physical
construct
of
the
watershed
and
representation
of
vulnerable
aquatic
environments
for
different
geographic
regions.
The
physicochemical
properties
(
pH,
redox
conditions,
etc.)
of
the
standard
farm
pond
are
based
on
a
Georgia
farm
pond.
These
properties
are
likely
to
be
regionally
specific
because
of
local
hydrogeological
conditions.
Any
alteration
in
water
quality
parameters
may
impact
the
environmental
behavior
of
the
pesticide.
The
farm
pond
represents
a
well
mixed,
static
water
body.
Because
the
farm
pond
is
a
static
water
body
(
no
flow
through),
it
does
not
account
for
pesticide
removal
through
flow
through
or
accidental
water
releases.
However,
the
lack
of
water
flow
in
the
farm
pond
provides
an
environmental
condition
for
accumulation
of
persistent
pesticides.
The
assumption
of
uniform
mixing
does
not
account
for
stratification
due
to
thermoclines
(
e.
g.,
seasonal
stratification
in
deep
water
bodies).
Additionally,
the
physical
construct
of
the
standard
runoff
scenario
assumes
a
watershed:
pond
area
ratio
of
10.
This
ratio
is
recommended
to
maintain
a
sustainable
pond
in
the
Southeastern
United
States.
The
use
of
higher
watershed:
pond
ratios
(
as
recommended
for
sustainable
ponds
in
drier
regions
of
the
United
States)
may
lead
to
higher
pesticide
concentrations
when
compared
to
the
standard
watershed:
pond
ratio.

Uncertainties
and
data
gaps
associated
with
the
environmental
fate
and
toxicity
data
There
are
a
number
of
areas
of
uncertainty
in
the
terrestrial
and
the
aquatic
organism
risk
assessments
that
could
potentially
cause
an
underestimation
of
risk.
First,
this
assessment
accounts
only
for
exposure
of
non­
target
organisms
to
dicamba,
but
not
to
its
degradates.
The
risks
presented
in
this
assessment
could
be
underestimated
if
the
primary
degradate
(
DCSA)
also
exhibit
toxicity
under
the
conditions
of
use
proposed
on
the
label.
Data
are
not
available
concerning
the
toxicity
of
the
degradation
products
of
dicamba.
Second,
the
risk
assessment
only
considers
the
most
sensitive
species
tested
and
only
considers
a
subset
of
possible
use
scenarios.
For
the
aquatic
organism
risk
assessment,
there
are
uncertainties
associated
with
the
PRZM/
EXAMS
model,
input
values,
and
scenarios
including
the
use
of
surrogate
scenarios,
however
these
uncertainties
cannot
be
quantified.
The
potential
impacts
of
these
uncertainties
are
outlined
in
the
Aquatic
Exposure
and
Risk
Assessment
and
the
Terrestrial
Exposure
and
Risk
Assessment
sections
of
this
document.

There
is
uncertainty
in
the
environmental
fate
of
the
typical
end
use
products
(
TEPs)
which
contain
the
sodium,
DMA
or
DGA
salts
of
dicamba.
Dissociation
rates,
adsorption/
desorption
rates
and
field
dissipation
information
are
needed
for
TEPs
to
determine
the
persistence
and
mobility
of
the
salts
and
their
associated
inert
ingredients
found
in
the
TEPs.
A
key
aspect
of
the
field
studies
should
include
the
formulated
TEPs.
Furthermore,
these
data
are
needed
to
adequately
assess
spray
drift
and
volatilization.

Additional
uncertainty
results
from
the
lack
of
information
and/
or
data
in
several
components
of
this
ecological
risk
assessment.
First,
chronic
toxicity
data
for
aquatic
organisms
is
not
available,
thus
the
potential
risk
due
to
prolonged
exposures
of
these
species
to
dicamba
80
cannot
be
estimated.
Second,
toxicity
data
is
not
available
concerning
the
acute
and
chronic
risk
to
sediment­
dwelling
benthic
organisms
which
may
contact
dicamba
in
aquatic
sediments.
Third,
data
are
unavailable
concerning
residue
levels
in
foliage,
insects,
and
seeds
to
accurately
predict
potential
risks
to
terrestrial
organisms
(
birds,
mammals,
pollinators)
which
may
contact
dicamba
residues
after
application.
Fourth,
field
studies
are
unavailable
to
determine
the
actual
extent
of
potential
indirect
effects
to
forest,
wetland,
and
ecotone
(
edge
and
riparian)
habitats.
81
References
Dexter,
A.
G.,
J.
L.
Gunsolus,
and
W.
S.
Curron.
1994.
Herbicide
Mode
of
Action
and
Sugarbeet
Injury
Symptoms.
North
Dakota
State
University
Extension
Service.

Grosselin,
R.
E.
1984.
Clinical
Toxicology
of
Commercial
Products.
5th
Ed.
Baltimore,
MD:
Williams
&
Wilkins.

Hartzler,
B.
2003.
Effect
of
dicamba
on
soybean
yields.
Iowa
State
University
Weed
Science.

Kidd,
H.
and
James,
D.
R.,
Eds.
The
Agrochemicals
Handbook,
Third
Edition,.
Royal
Society
of
Chemistry
Information
Services,
Cambridge,
UK,
1991
(
as
updated).

Proost,
R.
and
C.
Boerboom.
2004.
Dicamba
injury
to
soybeans.
Nutrient
and
Pest
Management.
University
of
Wisconsin
 
Madison.

Worthing,
C.
R.
(
ed.).
1987.
The
pesticide
manual:
A
world
compendium.
8th
Ed.
British
Crop
Protection
Council.
Croydon,
England.

U.
S.
Department
of
Agriculture,
Soil
Conservation
Service.
1990
(
Nov.)
SCS/
ARS/
CES
Pesticide
Properties
Database:
Version
2.0
(
Summary).
USDA
­
Soil
Conservation
Service,
Syracuse,
NY.

Weed
Science
Society
of
America.
Herbicide
Handbook,
Seventh
Edition.
Champaign,
IL,
1994.
82
APPENDIX
A:
Environmental
Fate
Studies,
Chemical
Structures
and
Some
Properties
of
Dicamba
Salts
and
DCSA
Environmental
Fate
Studies
Hydrolysis
(
161­
1)
MRID
40335501
(
MRID
40547902
is
a
duplicate)
Study
Status:
Acceptable
Yu,
C.
C.
1981.
Hydrolysis
of
14C­
Dicamba.
Laboratory
Project
ID:
480068­
34.
Unpublished
study
performed
by
Velsicol
Chemical
Corporation,
Chicago,
IL,
and
submitted
by
Sandoz
Crop
Protection
Corporation,
Des
Plaines,
IL.

Uniformly
ring­
labeled
[
14C]
dicamba
(
3,6­
dichloro­
o­
anisic
acid)
did
not
degrade
significantly
in
aqueous
buffered
solutions
adjusted
to
pH
5,
7,
and
9,
and
distilled
water
treated
with
dicamba
at
10
ppm
or
100
ppm
and
incubated
in
the
dark
at
25
or
35
/

C
for
30
days.
In
the
test
solutions
incubated
at
25
/

C,
parent
dicamba
was
92.36­
98.03%
of
the
applied
radioactivity
at
30
days
post­
treatment.
In
the
test
solutions
incubated
at
35
/

C,
parent
dicamba
was
>
92.4%
of
the
applied
radioactivity,
except
for
the
pH
7
test
solution
treated
at
100
ppm;
parent
dicamba
was
82.46%
at
29
days
post­
treatment.
Three
unidentified
degradates
were
each
<
3.54%
of
the
applied
radioactivity
in
any
of
the
test
systems.
The
material
balances
were
83.36­
103.21%.

Aqueous
Photolysis
(
161­
2)
MRID
42774102,
Study
Status:
Acceptable
Sen,
P.
K.,
C.
C.
Yu,
and
M.
L.
Ekdawi.
1993a.
Dicamba:
Photodegradation
study
in
pH
7
aqueous
solution.
Laboratory
Project
No.
480065;
Laboratory
Report
No.
19;
Sponsor
ID
No.
DP­
301251.
Unpublished
study
performed
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

Dicamba
(
3,6­
dichloro­
o­
anisic
acid)
photodegraded
with
a
half­
life
of
>
30
days
in
a
sterile
aqueous
buffer
solution
(
pH
7)
that
was
irradiated
for
30
days
with
a
xenon
arc
lamp
at
25
/

C;
dicamba
did
not
degrade
in
the
dark
control
sample.
The
registrant­
calculated
half­
life
was
38.1
days
under
continuous
irradiation
at
1.38
times
natural
sunlight
at
noon
in
the
spring
at
40
/

N.
The
major
identified
degradate
was
carbon
dioxide
(
maximum
of
15.26%
of
the
applied
radioactivity
at
30
days).
Numerous
other
degradates
were
present
at
<
7.72%
each
and
were
not
identified.

Soil
Photolysis
(
161­
3)
MRID
42774103,
Study
Status:
Acceptable
Sen,
P.
K.,
C.
C.
Yu,
and
M.
L.
Ekdawi.
1993b.
Dicamba:
Photodegradation
study
on
soil.
Laboratory
Project
No.
480065;
Laboratory
Report
No.
23;
Sponsor
ID
No.
DP­
301268.
Unpublished
study
performed
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

Dicamba
(
3,6­
dichloro­
o­
anisic
acid)
slowly
photodegraded
(
approximately
20%)
on
silt
loam
soil
that
was
continuously
irradiated
with
a
xenon
arc
lamp
for
30
days
at
25
/

C.
Dicamba
acid
did
not
degrade
in
the
dark
control.
The
only
identified
degradate
was
carbon
dioxide
(
maximum
of
3.07%
of
the
applied
at
30
days);
although
unidentified
degradates
were
formed
during
the
study,
none
were
present
at
>
3.71%
of
the
applied
at
any
time.
83
Aerobic
Soil
Metabolism
(
162­
1)
MRID
43245207,
Study
Status:
Acceptable
Wendt,
D.
R.
1994.
Aerobic
soil
metabolism
of
dicamba
acid.
Sandoz
Project
No.
480065­
26.
Unpublished
study
performed
and
submitted
by
Sandoz
Agro.
Inc.,
Des
Plaines,
IL.

Dicamba
acid
degraded
with
a
half­
life
of
6
days
from
silt
loam
soil
that
was
moistened
to
75%
of
0.33
bar,
treated
at
2.555
µ
g/
g
(
3.2
µ
g/
g
dry
weight)
with
dicamba
acid,
and
incubated
aerobically
in
the
dark
at
approximately
23
°
C
for
365
days.
CO
2
and
3,6­
dichlorosalicylic
acid
(
3,6­
DCSA)
were
the
primary
degradates
identified,
at
maximum
concentrations
of
67.3
and
17.4%
of
the
applied,
respectively.
Two
minor
degradates,
5­
hydroxy
dicamba
(
5­
OH)
and
3,6­
dichloro­
2,5­
dihydorxybenzoic
acid
(
2,5­
DiOH),
were
also
identified
at
maximum
concentrations
of
0.8
and
2.7%
of
the
applied,
respectively.
Other
nonvolatile
degradates
were
isolated
at
up
to
3.7%
of
the
applied
but
were
not
identified.

Anaerobic
Soil
Metabolism
(
162­
2)
MRID
43245208,
Study
Status:
Acceptable
Schmidt,
J.
M.
1994.
Anaerobic
aquatic
metabolism
of
14C­
dicamba.
ABC
Final
Report
No.
40518.
Unpublished
study
performed
by
ABC
Laboratories,
Inc.,
Columbia,
MO,
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

Dicamba
acid
degraded
with
a
half­
life
of
141
days
in
loam
soil:
pond
water
systems
that
were
treated
at
3.85
ppm
and
incubated
in
the
dark
for
12
months
under
anaerobic
(
nitrogen
gas)
conditions
at
approximately
25
°
C.
The
major
degradate
identified
in
the
soil:
water
systems
was
3,6­
dicholorsalicylic
acid
(
3,6­
DCSA)
at
a
maximum
of
61.6%
of
the
applied.
Two
minor
degradates,
5­
hydroxy
dicamba
(
5­
OH
dicamba)
and
3,6­
dichloro­
2,5­
dihydroxybenzoic
acid
(
3,6­
dichlorogentisic
acid;
3,6­
DCGA),
were
also
identified
;
maximum
concentrations
were
1.9
and
3.64%
of
the
applied,
respectively.
Volatile
[
14C]
residues
were
a
maximum
of
1.3%
of
the
applied
radioactivity
at
12
months
post
treatment.

Anaerobic
Aquatic
Degradation
(
162­
3)
MRID
43245208,
Study
Status:
Acceptable
Schmidt,
J.
M.
1994.
Anaerobic
aquatic
metabolism
of
14C­
dicamba.
ABC
Final
Report
No.
40518.
Unpublished
study
performed
by
ABC
Laboratories,
Inc.,
Columbia,
MO,
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

Dicamba
acid
degraded
with
a
half­
life
of
141
days
in
loam
soil:
pond
water
systems
that
were
treated
at
3.85
ppm
and
incubated
in
the
dark
for
12
months
under
anaerobic
(
nitrogen
gas)
conditions
at
approximately
25
°
C.
The
major
degradate
identified
in
the
soil:
water
systems
was
3,6­
dicholorsalicylic
acid
(
3,6­
DCSA)
at
a
maximum
of
61.6%
of
the
applied.
Two
minor
degradates,
5­
hydroxy
dicamba
(
5­
OH
dicamba)
and
3,6­
dichloro­
2,5­
dihydroxybenzoic
acid
(
3,6­
dichlorogentisic
acid;
3,6­
DCGA),
were
also
identified
;
maximum
concentrations
were
1.9
and
3.64%
of
the
applied,
respectively.
Volatile
[
14C]
residues
were
a
maximum
of
1.3%
of
the
applied
radioactivity
at
12
months
post
treatment.
84
Aerobic
Aquatic
Metabolism
(
162­
4)
MRID
43758509,
Study
Status:
Acceptable
Schmidt,
J.
M.
1995.
Aerobic
aquatic
metabolism
of
14C­
dicamba.
Laboratory
Study
ID:
42027.
Sandoz
Study
No.
DP
301819.
Unpublished
study
performed
by
ABC
Laboratories,
Inc.,
Columbia,
MO;
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

Uniformly
phenyl
ring
labeled
[
14C]
dicamba
acid,
at
a
nominal
application
rate
of
0.12
µ
g/
mL,
degraded
with
a
registrant­
calculated
half­
life
of
20.2
days
in
aerobic
flooded
loam
soil
that
was
incubated
in
darkness
at
25
±
1
°
C
for
62
days.
Using
non­
linear
analysis,
a
slightly
longer
registrant­
calculated
half­
life
of
24.3
days
was
determined.
In
the
total
soil/
water
system,
the
parent
(
reviewer­
calculated)
was
97.2­
100%
of
the
applied
radioactivity
at
0­
3
days,
decreased
to
81.7%
by
14
days
and
to
60.2%
by
21
days,
was
36.2%
at
30
days,
and
was
not
detected
by
51
days
post
treatment.
The
parent
compound
in
the
water
phase
was
initially
present
at
91.9%
(
0.113
ppm)
of
the
applied
radioactivity
at
day
0,
decreased
to
54.6­
75.6%
by
14­
21
days
post
treatment,
and
decreased
to
22.4%
(
0.55ppm)
by
41
days
post
treatment.
In
the
soil
(
Soil
Extract
1),
the
parent
compound
was
initially
present
at
7.05%
(
0.009ppm)
of
the
applied
radioactivity
at
day
1
(
methanol
extract
only),
decreased
to
6.10%
(
0.008ppm)
by
1
day
post
treatment,
then
increase
to
a
maximum
of
8.54%
(
0.011ppm)
by
3
days
post
treatment,
and
decreased
to
3.66%
(
0.005ppm)
by
day
41
post
treatment.
The
minor
degradate
3,6­
DCSA
was
initially
observed
in
the
water
phase
at
6.50%
(
0.008ppm)
of
the
applies
activity
at
14
days
post
treatment,
increased
to
a
maximum
of
8.55%
(
0.011ppm)
by
30
days,
and
decreased
to
0.813%
(
0.001ppm,
based
on
a
single
replicate)
by
day
62.
In
the
"
Soil
Extract
1"
(
methanol),
3,6­
DCSA
was
present
at
1.63%
(
0.002ppm)
at
30
days
post
treatment
and
<
0.001%
at
62
days
post
treatment
only.
In
the
"
Soil
Extract
2"
(
acidified
methanol:
water),
the
major
degradate
3,6­
DCSA
was
present
at
3.26%
(
0.004ppm)
at
day
14
post
treatment,
increased
to
26.0%
(
0.032ppm)
by
day
41,
and
decreased
to
4.88%
(
0.001ppm)
by
day
62.
The
distribution
of
[
14C]
residues
between
the
soil
and
water
fractions
was
not
reported,
but
the
majority
of
the
residues
were
observed
in
the
water
phase
throughout
the
study.
[
14C]
Residues
in
the
water
phase
were
92.4%
(
0.114ppm)
of
the
applied
radioactivity
at
day
0
and
decreased
to
2.04%
(
0.003ppm)
by
62
days
post
treatment.
In
the
soil
extracts,
total
[
14C]
residues
were
7.05%
(
0.009ppm)
of
the
applied
radioactivity
at
day
0,
increased
to
43.9%
(
0.054ppm)
by
41
days
,
and
were
22.0%
(
0.027ppm)
at
62
days
post
treatment.
Nonextractable
[
14C]
residues
comprised
14.65%
(
0.18ppm)
of
the
applied
at
62
days
post
treatment.
Evolved
14CO
2
accounted
for
1.63%
(
0.002ppm)
of
the
applied
radioactivity
at
14
days
post
treatment
and
was
53.6%
(
0.066ppm)
at
62
days
post
treatment.

Aqueous
Dissociation
MRID
43288001,
Study
Status:
Ancillary
Bebel,
J.
C.
1994.
Dissociation
rate
of
dicamba
salts.
Laboratory
ID
Project
No.
480063;
Report
No.
47;
Sponsor
ID
No.
DP
301564.
Unpublished
study
performed
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

This
is
an
acceptable
ancillary
study
and
can
be
used
to
provide
bridging
data
for
dicamba
salts
to
support
a
reduced
data
set
for
the
salts.
For
dicamba,
there
are
no
end­
use
products
containing
the
acid,
thus
data
from
studies
using
the
sodium
or
potassium
salt
can
serve
to
fulfill
data
requirements.
In
addition,
there
are
no
esters
of
the
dicamba,
and
the
other
registered
salts
for
dicamba
are
the
dimethylamine,
isopropylamine,
and
diglycoamine
salts.
This
study
provides
85
bridging
data
regarding
how
rapidly
the
salts
dissociate
in
support
of
a
reduced
data
set
for
the
salts.

As
determined
by
a
UV
spectrophotometric
method,
dicamba
salts
reached
essentially
100%
dissociation
within
75
seconds
of
the
time
of
mixing
with
pure
water.
The
observed
dissociation
half­
lives
in
pure
water,
0.1
N
NaOH
(
pH
13),
and
0.1
N
HCl
(
pH
1)
for
all
of
the
salts
were
less
than
10
seconds,
establishing
a
value
6.9
x
10­
2
sec­
1
as
the
lower
limit
for
the
dissociation
fate
constant
for
each
of
the
salts.
These
data,
combined
with
the
fact
that
dicamba
is
a
moderately
strong
acid
(
pK
a
=
1.87)
predict
that
when
these
dicamba
salts
are
release
into
the
environment
dissociation
will
be
rapid.

Adsorption/
Desorption
in
Soil
(
163­
1)
MRID
42774101,
Study
Status:
Acceptable
Tong,
T.
R.
1993a.
Soil
adsorption
and
desorption
of
dicamba,
unaged,
by
the
batch
equilibrium
method.
Laboratory
Project
No.
480065;
Laboratory
Report
No.
20;
Sponsor
ID
No.
DP­
301215.
Unpublished
study
performed
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL
This
study
(
MRID
42774101)
is
acceptable
and
partially
fulfills
EPA
Data
Requirements
for
Registering
Pesticides
by
providing
information
on
the
mobility
(
batch
equilibrium)
of
unaged
phenyl
ring­
labeled
[
14C]
dicamba
in
loam,
clay
loam,
silt
loam,
and
sandy
loam
soils,
and
loam
sediment.

Based
on
batch
equilibrium
experiments,
dicamba
acid
was
determined
to
be
very
mobile
in
loam,
clay
loam,
silt
loam,
and
sandy
loam
soils
and
a
loam
sediment,
with
Freundlich
K
ads
values
of
0.16,
0.10,
0.53.
0.07
and
0.21,
respectively.
Corresponding
K
oc
values
were
7.27,
3.45,
21.1,
17.5
and
17.5,
respectively.

MRID
43095301,
Study
Status:
Acceptable
Tong,
T.
R.
1993b.
Soil
adsorption
and
desorption
of
the
major
soil
metabolite
of
dicamba,
3,6­
dichlorosalicylic
acid
(
3,6­
DCSA),
by
the
batch
equilibrium
method.
Laboratory
Project
No.
480065;
Report
No.
21;
Sponsor
ID
No.
DP
301361.
Unpublished
study
performed
and
submitted
by
Sandoz
Agro,
Inc.,
Des
Plaines,
IL.

This
study
(
MRID
43095301)
is
acceptable
and
partially
fulfills
EPA
Data
Requirements
for
Registering
Pesticides
by
providing
information
on
the
mobility
(
batch
equilibrium)
of
phenyl
ringlabeled
[
14C]
3,6­
DCSA
in
loam,
clay
loam,
silt
loam,
and
sandy
loam
soils,
and
loam
sediment.

Based
on
batch
equilibrium
experiments,
3,6­
DCSA
(
3,6­
dichlorosalicylic
acid),
a
major
degradate
of
dicamba,
was
determined
to
be
mobile
in
sandy
loam
(
Freundlich
K
ads
value
of
2.51;
Ko
c
628)
and
clay
loam
(
K
ads
7.03;
Koc
242)
soils.
DCSA
was
determined
to
be
of
low
mobility
in
silt
loam
and
loam
soils
and
in
loam
sediment;
Freundlich
K
ads
values
were
20.29,
31.50,
and
35.16,
respectively;
corresponding
Ko
c
values
were
812,
1432,
and
2930,
respectively.
86
Laboratory
Volatility
(
163­
2)
MRID
41966602,
Study
Status:
Acceptable
Yu,
C.
C.
1988.
Addendum
to
report
no.
480060­
6
on
volatility
of
three
dicamba
formulations.
Laboratory
Project
ID:
480060­
6A.
Unpublished
study
performed
and
submitted
by
Sandoz
Crop
Protection
Corporation,
Des
Plaines,
IL.

The
portions
of
this
laboratory
volatility
study
conducted
with
the
potassium
salt
of
dicamba
and
the
dimethylamine
salt
of
dicamba
formulated
with
adjuvant
are
acceptable.

Dicamba
(
as
the
potassium
salt)
volatilized
from
moist
silty
clay
soil
that
was
treated
at
a
nominal
field
rate
of
0.5
lb
ai/
A
(
1.511
mg
ai/
jar)
with
a
soluble
concentrate
formulation
fortified
with
[
14C]
dicamba
(
radiochemical
purity
>
98%).
Volatility
rates
ranged
from
2.98
to
4.97
x
104
:
g/
cm2/
hr;
this
corresponded
to
air
concentrations
of
12.6­
21.0,
:
g/
m3.
Samples
were
incubated
for
up
to
96
hours
on
a
16­
hour
photoperiod
under
continuous
air­
flow
(
0.1
L/
min)
at
30
C
and
60%
relative
humidity.
Recovery
of
the
applied
radioactivity
was
96.5%.

Dicamba
(
as
the
dimethylamine
salt
formulated
with
the
adjuvant
Atplus
411f)
volatilized
from
moist
silty
clay
soil
that
was
treated
at
a
nominal
field
rate
of
0.5
lb
ai/
A
(
1.511
mg
ai/
jar)
with
soluble
concentrate
formulations
fortified
with
[
14C]
dicamba
(
radiochemical
purity
>
98%).
Volatility
rates
ranged
from
2.91
to
4.95
x
l0­
4
:
g/
cm2/
hr;
this
corresponded
to
air
concentrations
of
12.4­
21.0,
:
g/
m3.
Samples
were
incubated
for
up
to
96
hours
on
a
16­
hour
photoperiod
under
continuous
air­
flow
(
0.1
L/
min)
at
30
°
C
and
60%
relative
humidity.
Recovery
of
the
applied
radioactivity
was
70.6­
88.8%.

The
portion
of
the
laboratory
volatility
study
(
MRID
41966602;
Study
#
6)
conducted
with
the
dimethylamine
salt
of
dicamba
formulated
without
adjuvant
is
not
acceptable
because
the
material
balance
was
not
complete.
Because
the
material
balance
was
incomplete,
the
portion
of
the
study
using
the
dimethylamine
salt
of
dicamba
cannot
be
repaired
with
the
submission
of
additional
data.
However,
because
the
vapor
pressure
of
the
salt
is
expected
to
be
negligible,
as
indicated
in
the
registrant's
response
to
the
Dicamba
Salts
DCI
(
EFGWB
review
dated
5/
19/
94),
no
additional
data
on
the
laboratory
volatility
of
the
DMA
salt
is
required.

Terrestrial
Field
Dissipation
(
164­
1)
Studies
Status:
Supplemental
Field
dissipation
studies
of
dicamba
salts
were
conducted
in
several
locations
across
the
US
in
the
early
1990'
s
(
see
table
below).
Dicamba
salts
were
applied
to
bareground
plots
according
to
labeled
rates
and
soils
were
sampled
for
loss
of
parent
compound
and
the
presence
of
degradates
over
time.
The
major
dicamba
degradate
in
soil
samples
was
DCSA.
These
studies
are
supplemental
as
Subdivision
N
guidelines
were
not
fulfilled
in
that
application
rates
were
not
verified
in
the
field,
soil
sample
storage
stability
was
not
verified,
measurements
of
pan
evaporation
were
not
collected
during
the
studies
and
rainfall/
irrigation
amounts
did
not
fulfill
guideline
requirements.
87
MRID
No.
Dicamba
Test
Substance
Application
Rate
Study
Location
and
Soil
Type
Half­
life
(
days)

43361506
SAN
845
H
(
Na
salt)
SAN
821
H
(
DGA
salt)
1.0
lb
ae/
A
1.0
lb
ae/
A
LA,
silt
loam
soil
LA,
silt
loam
soil
3.2
3.0
43361507
Clarity
and
SAN
821
H
(
DGA
salt)
1.0
lb
ae/
A
NC,
loam
sand
soil
3.29
43651405
SAN
1214
H
(
DMA
salt)
2.0
lb
ae/
A
LA,
silt
loam
soil
9
43651407
Clarity
and
SAN
821
H
(
DGA
salt)
2.0
lb
ae/
A
IN,
loam
soil
12.9
43651408
Banvel
SGF
SAN845
H
(
Na
salt)
2.0
lb
ae/
A
2.0
lb
ae/
A
NC,
loam
sand
soil
NC,
loam
sand
soil
9
9
42754101
42883202
Banvel
4.0
(
DMA
salt)
1.0
lb
ae/
A
CA,
sandy
loam
soil
19.8
42754102
Banvel
4.0
(
DMA
salt)
1.0
lb
ae/
A
IN,
loam
soil
4.4
Octanol/
water
Partition
Coefficient
of
DCSA
MRID
41966601,
Study
Status:
Ancillary
Fostiak,
W.,
and
C.
C.
Yu.
1989.
Determination
of
n­
octanol/
water
partition
coefficient
for
3,6­
dichlorosalicylic
acid
(
DCSA).
Laboratory
Project
ID:
480065­
15.
Unpublished
study
performed
and
submitted
by
Sandoz
Crop
Protection
Corporation,
Des
Plaines,
IL.

N­
octanol/
water
partition
coefficients
(
K
0
)
for
3,6­
dichloro­
salicylic
acid
(
DCSA)
at
two
concentrations
(
nominally
4.96
x
104
M
and
5.67
x
10­
5
M)
in
buffered
aqueous
solutions
at
pHs
5,
7,
and
9
ranged
from
0.06
to
0.58
and
averaged
0.29.
Because
of
the
low
K
ow
,
DCSA
is
not
expected
to
bioaccumulate
in
aquatic
organisms.
88
TABLE
A.
1.
Some
Physical­
Chemical
and
Other
Properties
of
Dicamba
Salts
and
Dicamba's
Primary
Degradate
DCSA
CAS
Name
and
Chemical
Structure
CAS
No
Empirical
Formula
Molecular
Weight
Formulated
Product
Dicamba,
dimethylamine
salt
2300­
66­
5
C10H13Cl2NO3
266.1236
Banvel,
Banvel
CST,
Gharda
Dicamba,
sodium
salt
1982­
69­
0
C8H5Cl2NaO3
243.02147
Banvel
II/
SGF
,
Albaugh
Dicamba
SG
Dicamba,
diglycoamine
salt
104040­
79­
1
C12H17Cl2NO5
326.176
TABLE
A.
1.
Some
Physical­
Chemical
and
Other
Properties
of
Dicamba
Salts
and
Dicamba's
Primary
Degradate
DCSA
89
Dicamba,
isopropylamine
salt
55871­
02­
8
C11H15Cl2NO3
280.1504
Dicamba,
potassium
salt
10007­
85­
9
C8H5Cl2KO3
259.1217
3,6­
Dichlorosalicylic
acid
90
Appendix
B:
Aquatic
Exposure
Model
Results
Dicamba
Florida
Sugarcane
stored
as
dicFLsugcanground.
out
Chemical:
dicamba
PRZM
environment:
FLsugarcaneC.
txt
modified
Satday,
12
October
2002
at
16:
42:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w12844.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
30
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
4.431
4.117
3.248
2.249
1.697
0.4259
1962
37.09
32.86
21.43
10.48
7.286
1.811
1963
204
180
108
48.27
32.68
8.128
1964
37.16
32.54
20.63
10.89
7.427
1.837
1965
8.726
7.775
5.222
3.373
2.566
0.6483
1966
4.138
3.769
2.615
1.723
1.24
0.3087
1967
16.49
14.18
10.17
4.64
3.264
0.8502
1968
13.93
12.31
8.871
4.618
3.163
0.782
1969
104
95.31
57.76
25.26
17.12
4.243
1970
63.63
57.18
34.19
14.76
10
2.528
1971
38.94
34.07
22.79
12.6
8.714
2.171
1972
161
137
79.63
34.35
23.11
5.696
1973
28.77
25.17
15.56
7.219
5.087
1.268
1974
9.135
8.21
5.968
3.061
2.299
0.5771
1975
5.407
5.005
4.092
2.405
1.769
0.4433
1976
26.35
23.58
16.45
7.356
5.11
1.268
1977
126
105
55.44
24.07
16.45
4.086
1978
22.29
19.58
16
8.314
5.697
1.413
1979
164
141
85.91
40.47
27.43
6.8
1980
51.54
46.65
31.38
15.99
10.94
2.705
1981
15.5
13.54
10.96
6.403
4.621
1.154
1982
127
111
69.26
31.44
21.21
5.249
1983
4.287
3.8
2.379
1.861
1.424
0.3575
1984
57.87
50.04
30.97
13.92
9.428
2.379
1985
64.08
57.64
38.71
20.47
13.96
3.457
1986
11.06
9.857
6.752
4.417
3.221
0.8167
1987
41.6
36.66
27.16
12.41
8.736
2.172
1988
171
151
92.24
41.09
27.73
6.847
1989
212
189
117
54.23
36.73
9.095
1990
14.08
12.69
8.796
4.865
3.397
0.8443
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
212
189
117
54.23
36.73
9.095
0.0645161290322581
204
180
108
48.27
32.68
8.128
0.0967741935483871
171
151
92.24
41.09
27.73
6.847
0.129032258064516
164
141
85.91
40.47
27.43
6.8
0.161290322580645
161
137
79.63
34.35
23.11
5.696
0.193548387096774
127
111
69.26
31.44
21.21
5.249
0.225806451612903
126
105
57.76
25.26
17.12
4.243
0.258064516129032
104
95.31
55.44
24.07
16.45
4.086
0.290322580645161
64.08
57.64
38.71
20.47
13.96
3.457
0.32258064516129
63.63
57.18
34.19
15.99
10.94
2.705
91
0.354838709677419
57.87
50.04
31.38
14.76
10
2.528
0.387096774193548
51.54
46.65
30.97
13.92
9.428
2.379
0.419354838709677
41.6
36.66
27.16
12.6
8.736
2.172
0.451612903225806
38.94
34.07
22.79
12.41
8.714
2.171
0.483870967741936
37.16
32.86
21.43
10.89
7.427
1.837
0.516129032258065
37.09
32.54
20.63
10.48
7.286
1.811
0.548387096774194
28.77
25.17
16.45
8.314
5.697
1.413
0.580645161290323
26.35
23.58
16
7.356
5.11
1.268
0.612903225806452
22.29
19.58
15.56
7.219
5.087
1.268
0.645161290322581
16.49
14.18
10.96
6.403
4.621
1.154
0.67741935483871
15.5
13.54
10.17
4.865
3.397
0.8502
0.709677419354839
14.08
12.69
8.871
4.64
3.264
0.8443
0.741935483870968
13.93
12.31
8.796
4.618
3.221
0.8167
0.774193548387097
11.06
9.857
6.752
4.417
3.163
0.782
0.806451612903226
9.135
8.21
5.968
3.373
2.566
0.6483
0.838709677419355
8.726
7.775
5.222
3.061
2.299
0.5771
0.870967741935484
5.407
5.005
4.092
2.405
1.769
0.4433
0.903225806451613
4.431
4.117
3.248
2.249
1.697
0.4259
0.935483870967742
4.287
3.8
2.615
1.861
1.424
0.3575
0.967741935483871
4.138
3.769
2.379
1.723
1.24
0.3087
0.1
170.3
150
91.607
41.028
27.7
6.8423
Average
of
yearly
averages:
2.6787
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicFLsugcanground
Metfile:
w12844.
dvf
PRZM
scenario:
FLsugarcaneC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
3.14
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
92
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicFLsugcanaerial.
out
Chemical:
dicamba
PRZM
environment:
FLsugarcaneC.
txt
modified
Satday,
12
October
2002
at
16:
42:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w12844.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
30
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
7.85
7.069
4.945
3.971
2.861
0.7139
1962
37.81
33.49
21.88
11.79
8.265
2.053
1963
198
175
105
46.89
32.57
8.098
1964
38.05
33.31
21.47
11.95
8.14
2.012
1965
9.703
8.646
5.775
4.712
3.707
0.9299
1966
7.85
7.1
5.217
3.512
2.441
0.6056
1967
16.15
13.88
9.948
4.735
4.411
1.133
1968
14.66
13
9.739
6.109
4.161
1.028
1969
102
93.54
56.68
25.66
17.61
4.365
1970
61.61
55.35
33.09
14.29
10.75
2.71
1971
38.44
33.63
23.29
13.6
9.603
2.39
1972
159
136
78.59
34.24
23.04
5.679
1973
29.17
25.52
15.76
8.576
6.072
1.511
1974
9.904
8.95
6.404
4.671
3.444
0.8604
1975
7.85
7.089
4.899
4.119
2.926
0.7297
1976
27.9
25.04
17.09
8.759
6.051
1.499
1977
122
102
54
24.43
16.86
4.187
1978
23.53
20.89
17.69
9.792
6.69
1.658
1979
160
138
83.96
39.84
27.29
6.765
1980
54.64
49.46
33.22
17.1
11.71
2.894
1981
16.64
14.53
11.45
7.775
5.612
1.399
1982
126
109
68.34
31.54
21.35
5.284
1983
8.522
7.695
5.595
3.585
2.583
0.6439
1984
56.02
48.44
29.97
13.47
10.13
2.551
1985
67.81
60.99
40.91
21.41
14.59
3.613
1986
12
10.69
7.272
5.481
4.42
1.113
1987
41.86
36.55
27.08
13.76
9.636
2.395
1988
167
147
89.85
40.47
27.69
6.838
1989
209
187
116
53.64
36.34
8.996
1990
17.45
15.73
10.67
6.401
4.428
1.099
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
209
187
116
53.64
36.34
8.996
0.0645161290322581
198
175
105
46.89
32.57
8.098
0.0967741935483871
167
147
89.85
40.47
27.69
6.838
0.129032258064516
160
138
83.96
39.84
27.29
6.765
0.161290322580645
159
136
78.59
34.24
23.04
5.679
0.193548387096774
126
109
68.34
31.54
21.35
5.284
0.225806451612903
122
102
56.68
25.66
17.61
4.365
93
0.258064516129032
102
93.54
54
24.43
16.86
4.187
0.290322580645161
67.81
60.99
40.91
21.41
14.59
3.613
0.32258064516129
61.61
55.35
33.22
17.1
11.71
2.894
0.354838709677419
56.02
49.46
33.09
14.29
10.75
2.71
0.387096774193548
54.64
48.44
29.97
13.76
10.13
2.551
0.419354838709677
41.86
36.55
27.08
13.6
9.636
2.395
0.451612903225806
38.44
33.63
23.29
13.47
9.603
2.39
0.483870967741936
38.05
33.49
21.88
11.95
8.265
2.053
0.516129032258065
37.81
33.31
21.47
11.79
8.14
2.012
0.548387096774194
29.17
25.52
17.69
9.792
6.69
1.658
0.580645161290323
27.9
25.04
17.09
8.759
6.072
1.511
0.612903225806452
23.53
20.89
15.76
8.576
6.051
1.499
0.645161290322581
17.45
15.73
11.45
7.775
5.612
1.399
0.67741935483871
16.64
14.53
10.67
6.401
4.428
1.133
0.709677419354839
16.15
13.88
9.948
6.109
4.42
1.113
0.741935483870968
14.66
13
9.739
5.481
4.411
1.099
0.774193548387097
12
10.69
7.272
4.735
4.161
1.028
0.806451612903226
9.904
8.95
6.404
4.712
3.707
0.9299
0.838709677419355
9.703
8.646
5.775
4.671
3.444
0.8604
0.870967741935484
8.522
7.695
5.595
4.119
2.926
0.7297
0.903225806451613
7.85
7.1
5.217
3.971
2.861
0.7139
0.935483870967742
7.85
7.089
4.945
3.585
2.583
0.6439
0.967741935483871
7.85
7.069
4.899
3.512
2.441
0.6056
0.1
166.3
146.1
89.261
40.407
27.65
6.8307
Average
of
yearly
averages:
2.85844666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicFLsugcanaerial
Metfile:
w12844.
dvf
PRZM
scenario:
FLsugarcaneC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
3.14
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
94
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Louisiana
Sugarcane
stored
as
dicLAsugcanground.
out
Chemical:
dicamba
PRZM
environment:
LAsugarcaneC.
txt
modified
Satday,
12
October
2002
at
17:
02:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13970.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
36
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
51.64
47.63
35.21
18.04
12.48
3.112
1962
116
104
67.83
32.48
22.08
5.485
1963
1.574
1.433
1.156
0.6783
0.4693
0.1201
1964
11.88
10.78
8.787
4.701
3.24
0.802
1965
25.63
23.35
16.09
8.03
5.538
1.377
1966
67
60.19
41.31
21.07
14.5
3.601
1967
23.29
19.54
12.18
6.897
4.737
1.178
1968
4.15
3.788
2.576
1.5
1.05
0.2614
1969
5.367
4.739
3.321
2.021
1.402
0.348
1970
51.55
46.87
33.25
17.59
12.06
2.993
1971
4.273
3.958
2.699
1.596
1.164
0.292
1972
9.164
7.907
4.734
2.642
1.846
0.4581
1973
141
128
84.44
40.36
27.51
6.817
1974
14.76
13.4
9.353
4.917
3.381
0.8421
1975
22.42
19.94
13.03
6.295
4.413
1.098
1976
12.87
11.58
7.686
3.927
2.877
0.72
1977
37.33
33.35
22.44
10.76
7.355
1.823
1978
36.53
31.86
23.07
10.51
7.289
1.814
1979
141
128
80.93
39.32
26.89
6.681
1980
17.13
14.79
11.03
5.323
3.61
0.8953
1981
4.5
4.088
2.993
1.706
1.171
0.2911
1982
13.12
12.15
8.502
4.435
3.035
0.7528
1983
21.56
19.03
11.99
6.226
4.298
1.068
1984
5.645
5.065
3.652
2.069
1.517
0.3803
1985
1.783
1.605
1.119
0.898
0.6303
0.157
1986
31.88
29.19
19.92
9.501
6.488
1.608
1987
6.973
6.214
4.042
2.15
1.56
0.3903
1988
14.75
13.45
9.568
4.964
3.42
0.8466
1989
23.06
19.54
10.54
4.565
3.086
0.7643
1990
5.936
5.476
3.917
2.127
1.463
0.3631
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
141
128
84.44
40.36
27.51
6.817
95
0.0645161290322581
141
128
80.93
39.32
26.89
6.681
0.0967741935483871
116
104
67.83
32.48
22.08
5.485
0.129032258064516
67
60.19
41.31
21.07
14.5
3.601
0.161290322580645
51.64
47.63
35.21
18.04
12.48
3.112
0.193548387096774
51.55
46.87
33.25
17.59
12.06
2.993
0.225806451612903
37.33
33.35
23.07
10.76
7.355
1.823
0.258064516129032
36.53
31.86
22.44
10.51
7.289
1.814
0.290322580645161
31.88
29.19
19.92
9.501
6.488
1.608
0.32258064516129
25.63
23.35
16.09
8.03
5.538
1.377
0.354838709677419
23.29
19.94
13.03
6.897
4.737
1.178
0.387096774193548
23.06
19.54
12.18
6.295
4.413
1.098
0.419354838709677
22.42
19.54
11.99
6.226
4.298
1.068
0.451612903225806
21.56
19.03
11.03
5.323
3.61
0.8953
0.483870967741936
17.13
14.79
10.54
4.964
3.42
0.8466
0.516129032258065
14.76
13.45
9.568
4.917
3.381
0.8421
0.548387096774194
14.75
13.4
9.353
4.701
3.24
0.802
0.580645161290323
13.12
12.15
8.787
4.565
3.086
0.7643
0.612903225806452
12.87
11.58
8.502
4.435
3.035
0.7528
0.645161290322581
11.88
10.78
7.686
3.927
2.877
0.72
0.67741935483871
9.164
7.907
4.734
2.642
1.846
0.4581
0.709677419354839
6.973
6.214
4.042
2.15
1.56
0.3903
0.741935483870968
5.936
5.476
3.917
2.127
1.517
0.3803
0.774193548387097
5.645
5.065
3.652
2.069
1.463
0.3631
0.806451612903226
5.367
4.739
3.321
2.021
1.402
0.348
0.838709677419355
4.5
4.088
2.993
1.706
1.171
0.292
0.870967741935484
4.273
3.958
2.699
1.596
1.164
0.2911
0.903225806451613
4.15
3.788
2.576
1.5
1.05
0.2614
0.935483870967742
1.783
1.605
1.156
0.898
0.6303
0.157
0.967741935483871
1.574
1.433
1.119
0.6783
0.4693
0.1201
0.1
111.1
99.619
65.178
31.339
21.322
5.2966
Average
of
yearly
averages:
1.57798333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicLAsugcanground
Metfile:
w13970.
dvf
PRZM
scenario:
LAsugarcaneC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
96
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
3.14
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicLAsugcanaerial.
out
Chemical:
dicamba
PRZM
environment:
LAsugarcaneC.
txt
modified
Satday,
12
October
2002
at
17:
02:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13970.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
36
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
53.59
49.43
36.36
19.13
13.5
3.362
1962
114
103
66.87
32.36
22.37
5.555
1963
7.854
7.15
5.102
2.635
1.806
0.4513
1964
15.69
14.23
11.8
6.452
4.436
1.098
1965
29.84
27.19
18.73
9.712
6.69
1.663
1966
68.86
61.86
42.84
22
15.18
3.77
1967
28.69
24.07
14.54
7.897
5.413
1.346
1968
7.851
7.194
5.988
3.536
2.445
0.6069
1969
8.73
7.864
6.346
3.649
2.512
0.6232
1970
55.81
50.74
35.87
18.85
12.92
3.207
1971
7.852
7.277
5.354
3.772
2.655
0.6618
1972
10.78
9.304
6.444
4.416
3.044
0.7538
1973
141
128
84.43
40.41
27.57
6.832
1974
20.51
18.62
12.92
6.633
4.555
1.133
1975
24.05
21.39
14.04
7.745
5.396
1.342
1976
14.35
12.91
8.736
5.901
4.229
1.055
1977
40.31
36.07
24.28
12.07
8.24
2.042
1978
37.76
32.93
23.55
11.9
8.293
2.062
1979
139
126
79.94
38.96
26.91
6.684
1980
19.57
16.89
13.13
6.519
4.415
1.094
1981
8.609
7.822
6.756
3.615
2.473
0.6136
1982
17.43
16.1
11.87
6.27
4.283
1.062
1983
24.74
21.84
13.76
7.625
5.245
1.302
1984
7.851
7.226
5.186
4.106
2.91
0.7252
1985
7.85
7.226
5.256
2.997
2.065
0.5128
1986
35.67
32.66
22.29
11.05
7.537
1.868
1987
8.702
7.756
5.326
4.217
2.969
0.7397
1988
19.66
17.92
12.66
6.805
4.68
1.158
1989
24.63
20.85
11.25
6.214
4.189
1.037
1990
9.579
8.837
6.909
4.147
2.832
0.7022
97
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
141
128
84.43
40.41
27.57
6.832
0.0645161290322581
139
126
79.94
38.96
26.91
6.684
0.0967741935483871
114
103
66.87
32.36
22.37
5.555
0.129032258064516
68.86
61.86
42.84
22
15.18
3.77
0.161290322580645
55.81
50.74
36.36
19.13
13.5
3.362
0.193548387096774
53.59
49.43
35.87
18.85
12.92
3.207
0.225806451612903
40.31
36.07
24.28
12.07
8.293
2.062
0.258064516129032
37.76
32.93
23.55
11.9
8.24
2.042
0.290322580645161
35.67
32.66
22.29
11.05
7.537
1.868
0.32258064516129
29.84
27.19
18.73
9.712
6.69
1.663
0.354838709677419
28.69
24.07
14.54
7.897
5.413
1.346
0.387096774193548
24.74
21.84
14.04
7.745
5.396
1.342
0.419354838709677
24.63
21.39
13.76
7.625
5.245
1.302
0.451612903225806
24.05
20.85
13.13
6.805
4.68
1.158
0.483870967741936
20.51
18.62
12.92
6.633
4.555
1.133
0.516129032258065
19.66
17.92
12.66
6.519
4.436
1.098
0.548387096774194
19.57
16.89
11.87
6.452
4.415
1.094
0.580645161290323
17.43
16.1
11.8
6.27
4.283
1.062
0.612903225806452
15.69
14.23
11.25
6.214
4.229
1.055
0.645161290322581
14.35
12.91
8.736
5.901
4.189
1.037
0.67741935483871
10.78
9.304
6.909
4.416
3.044
0.7538
0.709677419354839
9.579
8.837
6.756
4.217
2.969
0.7397
0.741935483870968
8.73
7.864
6.444
4.147
2.91
0.7252
0.774193548387097
8.702
7.822
6.346
4.106
2.832
0.7022
0.806451612903226
8.609
7.756
5.988
3.772
2.655
0.6618
0.838709677419355
7.854
7.277
5.354
3.649
2.512
0.6232
0.870967741935484
7.852
7.226
5.326
3.615
2.473
0.6136
0.903225806451613
7.851
7.226
5.256
3.536
2.445
0.6069
0.935483870967742
7.851
7.194
5.186
2.997
2.065
0.5128
0.967741935483871
7.85
7.15
5.102
2.635
1.806
0.4513
0.1
109.486
98.886
64.467
31.324
21.651
5.3765
Average
of
yearly
averages:
1.83541666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicLAsugcanaerial
Metfile:
w13970.
dvf
PRZM
scenario:
LAsugarcaneC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
98
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
3.14
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
California
Alfalfa
stored
as
dicCAalfalfaground.
out
Chemical:
dicamba
PRZM
environment:
CAalfalfaC.
txt
modified
Satday,
12
October
2002
at
16:
27:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w93193.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.242
1.201
1.152
0.7186
0.4793
0.2208
1962
1.2
1.119
0.8442
0.488
0.3842
0.2089
1963
3.08
2.915
2.341
1.446
1.033
0.2716
1964
1.286
1.188
1.016
0.7326
0.5052
0.2133
1965
1.155
1.086
0.8441
0.4802
0.3405
0.2025
1966
1.159
1.076
0.7978
0.4291
0.3101
0.1943
1967
8.232
7.927
6.442
3.652
2.576
0.7122
1968
3.246
3.035
2.386
1.981
1.549
0.4622
1969
1.188
1.117
0.8678
0.4799
0.3589
0.2393
1970
3.3
3.143
2.728
1.51
1.007
0.4161
1971
16.6
15.65
12.3
7.316
5.183
1.537
1972
1.349
1.198
0.8161
0.5666
0.5124
0.2279
1973
1.699
1.591
1.222
0.8045
0.6424
0.2854
1974
2.705
2.508
2.04
1.555
1.091
0.3957
1975
1.255
1.197
0.9773
0.6629
0.507
0.341
1976
1.668
1.549
1.154
0.6994
0.5508
0.2851
1977
1.138
1.056
0.7853
0.552
0.3905
0.1512
1978
1.53
1.442
1.172
0.72
0.5054
0.2339
1979
1.125
1.053
0.8043
0.4357
0.3012
0.1116
1980
1.138
1.067
0.8213
0.4694
0.3302
0.1151
1981
2.894
2.704
2.064
1.157
0.796
0.2261
1982
2.511
2.28
1.643
1.145
0.9402
0.3422
1983
3.623
3.361
2.389
1.423
1.017
0.295
1984
1.121
1.053
0.8102
0.4217
0.29
0.1148
1985
1.141
1.054
0.7699
0.4409
0.3395
0.1903
99
1986
3.295
3.16
1.791
0.6621
0.4416
0.2112
1987
4.068
3.697
2.539
1.759
1.375
0.6274
1988
9.521
8.956
6.884
3.88
2.733
0.6949
1989
2.013
1.845
1.311
0.8854
0.643
0.2079
1990
3.311
3.069
2.239
1.572
1.182
0.3037
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
16.6
15.65
12.3
7.316
5.183
1.537
0.0645161290322581
9.521
8.956
6.884
3.88
2.733
0.7122
0.0967741935483871
8.232
7.927
6.442
3.652
2.576
0.6949
0.129032258064516
4.068
3.697
2.728
1.981
1.549
0.6274
0.161290322580645
3.623
3.361
2.539
1.759
1.375
0.4622
0.193548387096774
3.311
3.16
2.389
1.572
1.182
0.4161
0.225806451612903
3.3
3.143
2.386
1.555
1.091
0.3957
0.258064516129032
3.295
3.069
2.341
1.51
1.033
0.3422
0.290322580645161
3.246
3.035
2.239
1.446
1.017
0.341
0.32258064516129
3.08
2.915
2.064
1.423
1.007
0.3037
0.354838709677419
2.894
2.704
2.04
1.157
0.9402
0.295
0.387096774193548
2.705
2.508
1.791
1.145
0.796
0.2854
0.419354838709677
2.511
2.28
1.643
0.8854
0.643
0.2851
0.451612903225806
2.013
1.845
1.311
0.8045
0.6424
0.2716
0.483870967741936
1.699
1.591
1.222
0.7326
0.5508
0.2393
0.516129032258065
1.668
1.549
1.172
0.72
0.5124
0.2339
0.548387096774194
1.53
1.442
1.154
0.7186
0.507
0.2279
0.580645161290323
1.349
1.201
1.152
0.6994
0.5054
0.2261
0.612903225806452
1.286
1.198
1.016
0.6629
0.5052
0.2208
0.645161290322581
1.255
1.197
0.9773
0.6621
0.4793
0.2133
0.67741935483871
1.242
1.188
0.8678
0.5666
0.4416
0.2112
0.709677419354839
1.2
1.119
0.8442
0.552
0.3905
0.2089
0.741935483870968
1.188
1.117
0.8441
0.488
0.3842
0.2079
0.774193548387097
1.159
1.086
0.8213
0.4802
0.3589
0.2025
0.806451612903226
1.155
1.076
0.8161
0.4799
0.3405
0.1943
0.838709677419355
1.141
1.067
0.8102
0.4694
0.3395
0.1903
0.870967741935484
1.138
1.056
0.8043
0.4409
0.3302
0.1512
0.903225806451613
1.138
1.054
0.7978
0.4357
0.3101
0.1151
0.935483870967742
1.125
1.053
0.7853
0.4291
0.3012
0.1148
0.967741935483871
1.121
1.053
0.7699
0.4217
0.29
0.1116
0.1
7.8156
7.504
6.0706
3.4849
2.4733
0.68815
Average
of
yearly
averages:
0.33462
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicCAalfalfaground
Metfile:
w93193.
dvf
PRZM
scenario:
CAalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
100
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicCAalfalfaerial.
out
Chemical:
dicamba
PRZM
environment:
CAalfalfaC.
txt
modified
Satday,
12
October
2002
at
16:
27:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w93193.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.242
1.201
1.152
0.7186
0.4793
0.2208
1962
1.2
1.119
0.8442
0.488
0.3842
0.2089
1963
3.08
2.915
2.341
1.446
1.033
0.2716
1964
1.286
1.188
1.016
0.7326
0.5052
0.2133
1965
1.155
1.086
0.8441
0.4802
0.3405
0.2025
1966
1.159
1.076
0.7978
0.4291
0.3101
0.1943
1967
8.232
7.927
6.442
3.652
2.576
0.7122
1968
3.246
3.035
2.386
1.981
1.549
0.4622
1969
1.188
1.117
0.8678
0.4799
0.3589
0.2393
1970
3.3
3.143
2.728
1.51
1.007
0.4161
1971
16.6
15.65
12.3
7.316
5.183
1.537
1972
1.349
1.198
0.8161
0.5666
0.5124
0.2279
1973
1.699
1.591
1.222
0.8045
0.6424
0.2854
1974
2.705
2.508
2.04
1.555
1.091
0.3957
1975
1.255
1.197
0.9773
0.6629
0.507
0.341
1976
1.668
1.549
1.154
0.6994
0.5508
0.2851
1977
1.138
1.056
0.7853
0.552
0.3905
0.1512
1978
1.53
1.442
1.172
0.72
0.5054
0.2339
1979
1.125
1.053
0.8043
0.4357
0.3012
0.1116
1980
1.138
1.067
0.8213
0.4694
0.3302
0.1151
1981
2.894
2.704
2.064
1.157
0.796
0.2261
1982
2.511
2.28
1.643
1.145
0.9402
0.3422
101
1983
3.623
3.361
2.389
1.423
1.017
0.295
1984
1.121
1.053
0.8102
0.4217
0.29
0.1148
1985
1.141
1.054
0.7699
0.4409
0.3395
0.1903
1986
3.295
3.16
1.791
0.6621
0.4416
0.2112
1987
4.068
3.697
2.539
1.759
1.375
0.6274
1988
9.521
8.956
6.884
3.88
2.733
0.6949
1989
2.013
1.845
1.311
0.8854
0.643
0.2079
1990
3.311
3.069
2.239
1.572
1.182
0.3037
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
16.6
15.65
12.3
7.316
5.183
1.537
0.0645161290322581
9.521
8.956
6.884
3.88
2.733
0.7122
0.0967741935483871
8.232
7.927
6.442
3.652
2.576
0.6949
0.129032258064516
4.068
3.697
2.728
1.981
1.549
0.6274
0.161290322580645
3.623
3.361
2.539
1.759
1.375
0.4622
0.193548387096774
3.311
3.16
2.389
1.572
1.182
0.4161
0.225806451612903
3.3
3.143
2.386
1.555
1.091
0.3957
0.258064516129032
3.295
3.069
2.341
1.51
1.033
0.3422
0.290322580645161
3.246
3.035
2.239
1.446
1.017
0.341
0.32258064516129
3.08
2.915
2.064
1.423
1.007
0.3037
0.354838709677419
2.894
2.704
2.04
1.157
0.9402
0.295
0.387096774193548
2.705
2.508
1.791
1.145
0.796
0.2854
0.419354838709677
2.511
2.28
1.643
0.8854
0.643
0.2851
0.451612903225806
2.013
1.845
1.311
0.8045
0.6424
0.2716
0.483870967741936
1.699
1.591
1.222
0.7326
0.5508
0.2393
0.516129032258065
1.668
1.549
1.172
0.72
0.5124
0.2339
0.548387096774194
1.53
1.442
1.154
0.7186
0.507
0.2279
0.580645161290323
1.349
1.201
1.152
0.6994
0.5054
0.2261
0.612903225806452
1.286
1.198
1.016
0.6629
0.5052
0.2208
0.645161290322581
1.255
1.197
0.9773
0.6621
0.4793
0.2133
0.67741935483871
1.242
1.188
0.8678
0.5666
0.4416
0.2112
0.709677419354839
1.2
1.119
0.8442
0.552
0.3905
0.2089
0.741935483870968
1.188
1.117
0.8441
0.488
0.3842
0.2079
0.774193548387097
1.159
1.086
0.8213
0.4802
0.3589
0.2025
0.806451612903226
1.155
1.076
0.8161
0.4799
0.3405
0.1943
0.838709677419355
1.141
1.067
0.8102
0.4694
0.3395
0.1903
0.870967741935484
1.138
1.056
0.8043
0.4409
0.3302
0.1512
0.903225806451613
1.138
1.054
0.7978
0.4357
0.3101
0.1151
0.935483870967742
1.125
1.053
0.7853
0.4291
0.3012
0.1148
0.967741935483871
1.121
1.053
0.7699
0.4217
0.29
0.1116
0.1
7.8156
7.504
6.0706
3.4849
2.4733
0.68815
Average
of
yearly
averages:
0.33462
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicCAalfalfaerial
Metfile:
w93193.
dvf
PRZM
scenario:
CAalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
102
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Minnesota
Alfalfa
stored
as
dicMNalfalfaground.
out
Chemical:
dicamba
PRZM
environment:
MNalfalfaC.
txt
modified
Satday,
12
October
2002
at
17:
04:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.933
1.881
1.615
1.142
0.8461
0.2174
1962
1.122
1.09
0.9594
0.626
0.4583
0.1183
1963
1.121
1.083
0.9369
0.6677
0.5022
0.1294
1964
11.84
11.39
9.41
5.721
4.129
1.053
1965
1.129
1.09
0.9403
0.6493
0.4853
0.1308
1966
1.209
1.177
1.075
0.8073
0.6045
0.1564
1967
14.66
14.24
12.89
9.182
6.936
1.818
1968
4.514
4.357
3.727
2.564
1.948
0.5167
1969
1.125
1.079
0.9062
0.723
0.5731
0.153
1970
3.268
3.167
2.749
1.887
1.4
0.3598
1971
1.123
1.084
0.9604
0.6575
0.4847
0.1267
1972
1.121
1.088
0.9537
0.708
0.5262
0.1363
1973
1.121
1.087
0.9539
0.6491
0.4823
0.1251
1974
1.126
1.089
1.023
0.7557
0.5661
0.1459
1975
2.95
2.875
2.552
1.713
1.244
0.3171
103
1976
1.122
1.08
0.9197
0.6037
0.441
0.1134
1977
15.78
14.38
9.994
5.357
3.876
1.007
1978
1.13
1.095
0.9545
0.6162
0.4501
0.1202
1979
4.474
4.34
3.806
2.693
2.004
0.5164
1980
1.124
1.078
0.9046
0.5603
0.4075
0.1061
1981
1.223
1.17
0.928
0.8227
0.6705
0.179
1982
1.122
1.089
0.9554
0.6449
0.4849
0.127
1983
1.121
1.089
0.9615
0.7118
0.5344
0.1378
1984
1.121
1.082
0.931
0.6216
0.4555
0.1169
1985
1.121
1.08
0.9204
0.7544
0.582
0.1541
1986
4.765
4.59
3.996
2.59
1.9
0.4891
1987
1.124
1.075
0.891
0.7296
0.5524
0.1446
1988
1.121
1.082
0.9281
0.57
0.404
0.102
1989
1.121
1.083
0.9353
0.7916
0.615
0.1593
1990
1.121
1.085
1.001
0.7049
0.52
0.1343
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
15.78
14.38
12.89
9.182
6.936
1.818
0.0645161290322581
14.66
14.24
9.994
5.721
4.129
1.053
0.0967741935483871
11.84
11.39
9.41
5.357
3.876
1.007
0.129032258064516
4.765
4.59
3.996
2.693
2.004
0.5167
0.161290322580645
4.514
4.357
3.806
2.59
1.948
0.5164
0.193548387096774
4.474
4.34
3.727
2.564
1.9
0.4891
0.225806451612903
3.268
3.167
2.749
1.887
1.4
0.3598
0.258064516129032
2.95
2.875
2.552
1.713
1.244
0.3171
0.290322580645161
1.933
1.881
1.615
1.142
0.8461
0.2174
0.32258064516129
1.223
1.177
1.075
0.8227
0.6705
0.179
0.354838709677419
1.209
1.17
1.023
0.8073
0.615
0.1593
0.387096774193548
1.13
1.095
1.001
0.7916
0.6045
0.1564
0.419354838709677
1.129
1.09
0.9615
0.7557
0.582
0.1541
0.451612903225806
1.126
1.09
0.9604
0.7544
0.5731
0.153
0.483870967741936
1.125
1.089
0.9594
0.7296
0.5661
0.1459
0.516129032258065
1.124
1.089
0.9554
0.723
0.5524
0.1446
0.548387096774194
1.124
1.089
0.9545
0.7118
0.5344
0.1378
0.580645161290323
1.123
1.088
0.9539
0.708
0.5262
0.1363
0.612903225806452
1.122
1.087
0.9537
0.7049
0.52
0.1343
0.645161290322581
1.122
1.085
0.9403
0.6677
0.5022
0.1308
0.67741935483871
1.122
1.084
0.9369
0.6575
0.4853
0.1294
0.709677419354839
1.121
1.083
0.9353
0.6493
0.4849
0.127
0.741935483870968
1.121
1.083
0.931
0.6491
0.4847
0.1267
0.774193548387097
1.121
1.082
0.9281
0.6449
0.4823
0.1251
0.806451612903226
1.121
1.082
0.928
0.626
0.4583
0.1202
0.838709677419355
1.121
1.08
0.9204
0.6216
0.4555
0.1183
0.870967741935484
1.121
1.08
0.9197
0.6162
0.4501
0.1169
0.903225806451613
1.121
1.079
0.9062
0.6037
0.441
0.1134
0.935483870967742
1.121
1.078
0.9046
0.57
0.4075
0.1061
0.967741935483871
1.121
1.075
0.891
0.5603
0.404
0.102
0.1
11.1325
10.71
8.8686
5.0906
3.6888
0.95797
Average
of
yearly
averages:
0.303703333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
104
Data
used
for
this
run:
Output
File:
dicMNalfalfaerial
Metfile:
w14914.
dvf
PRZM
scenario:
MNalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicMNalfalfaaerial.
out
Chemical:
dicamba
PRZM
environment:
MNalfalfaC.
txt
modified
Satday,
12
October
2002
at
17:
04:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
5.913
5.755
5.341
3.753
2.759
0.707
1962
5.605
5.445
4.793
3.123
2.286
0.5887
1963
5.604
5.416
4.684
3.185
2.345
0.6008
1964
15.38
14.8
12.23
7.74
5.629
1.435
1965
5.612
5.418
4.673
3.171
2.361
0.6199
1966
5.607
5.461
4.97
3.534
2.632
0.6801
1967
18.34
17.81
16.19
11.52
8.733
2.291
1968
8.328
8.037
6.975
5.045
3.803
0.9992
1969
5.609
5.379
4.518
3.109
2.37
0.6196
105
1970
7.389
7.161
6.257
4.465
3.298
0.8474
1971
5.606
5.414
4.695
3.143
2.308
0.5994
1972
5.605
5.44
4.768
3.143
2.294
0.5902
1973
5.605
5.436
4.768
3.241
2.407
0.6238
1974
5.605
5.417
4.775
3.346
2.493
0.6416
1975
7.244
7.061
6.342
4.272
3.097
0.7906
1976
5.605
5.395
4.594
3.015
2.202
0.5633
1977
17.98
16.38
11.39
6.923
5.172
1.336
1978
5.612
5.438
4.74
3.059
2.234
0.5785
1979
8.753
8.49
7.511
5.292
3.937
1.015
1980
5.608
5.38
4.513
2.795
2.032
0.5225
1981
5.604
5.407
4.64
3.233
2.453
0.6401
1982
5.606
5.44
4.773
3.184
2.388
0.6226
1983
5.605
5.445
4.807
3.392
2.529
0.6508
1984
5.605
5.409
4.655
3.107
2.276
0.5836
1985
5.604
5.4
4.602
3.046
2.272
0.5941
1986
8.854
8.528
7.326
4.904
3.585
0.9231
1987
5.607
5.362
4.445
2.907
2.115
0.543
1988
5.604
5.41
4.639
2.849
2.019
0.5087
1989
5.603
5.415
4.676
3.225
2.404
0.6161
1990
5.605
5.423
4.77
3.234
2.377
0.6121
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
18.34
17.81
16.19
11.52
8.733
2.291
0.0645161290322581
17.98
16.38
12.23
7.74
5.629
1.435
0.0967741935483871
15.38
14.8
11.39
6.923
5.172
1.336
0.129032258064516
8.854
8.528
7.511
5.292
3.937
1.015
0.161290322580645
8.753
8.49
7.326
5.045
3.803
0.9992
0.193548387096774
8.328
8.037
6.975
4.904
3.585
0.9231
0.225806451612903
7.389
7.161
6.342
4.465
3.298
0.8474
0.258064516129032
7.244
7.061
6.257
4.272
3.097
0.7906
0.290322580645161
5.913
5.755
5.341
3.753
2.759
0.707
0.32258064516129
5.612
5.461
4.97
3.534
2.632
0.6801
0.354838709677419
5.612
5.445
4.807
3.392
2.529
0.6508
0.387096774193548
5.609
5.445
4.793
3.346
2.493
0.6416
0.419354838709677
5.608
5.44
4.775
3.241
2.453
0.6401
0.451612903225806
5.607
5.44
4.773
3.234
2.407
0.6238
0.483870967741936
5.607
5.438
4.77
3.233
2.404
0.6226
0.516129032258065
5.606
5.436
4.768
3.225
2.388
0.6199
0.548387096774194
5.606
5.423
4.768
3.185
2.377
0.6196
0.580645161290323
5.605
5.418
4.74
3.184
2.37
0.6161
0.612903225806452
5.605
5.417
4.695
3.171
2.361
0.6121
0.645161290322581
5.605
5.416
4.684
3.143
2.345
0.6008
0.67741935483871
5.605
5.415
4.676
3.143
2.308
0.5994
0.709677419354839
5.605
5.414
4.673
3.123
2.294
0.5941
0.741935483870968
5.605
5.41
4.655
3.109
2.286
0.5902
0.774193548387097
5.605
5.409
4.64
3.107
2.276
0.5887
0.806451612903226
5.605
5.407
4.639
3.059
2.272
0.5836
0.838709677419355
5.604
5.4
4.602
3.046
2.234
0.5785
0.870967741935484
5.604
5.395
4.594
3.015
2.202
0.5633
0.903225806451613
5.604
5.38
4.518
2.907
2.115
0.543
0.935483870967742
5.604
5.379
4.513
2.849
2.032
0.5225
0.967741935483871
5.603
5.362
4.445
2.795
2.019
0.5087
106
0.1
14.7274
14.1728
11.0021
6.7599
5.0485
1.3039
Average
of
yearly
averages:
0.764793333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMNalfalfaaerial
Metfile:
w14914.
dvf
PRZM
scenario:
MNalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)
Dicamba
Pennsylvania
Alfalfa
stored
as
dicPAalfalfaground.
out
Chemical:
dicamba
PRZM
environment:
PAalfalfaC.
txt
modified
Satday,
12
October
2002
at
17:
24:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14737.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
12
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.3
1.247
1.063
0.6943
0.5048
0.1277
1962
1.12
1.07
0.8841
0.5435
0.3896
0.09904
1963
1.12
1.074
0.9465
0.6528
0.4771
0.1216
1964
2.408
2.302
1.875
1.187
0.8611
0.2186
1965
1.121
1.08
0.9199
0.5643
0.4065
0.1036
1966
1.12
1.081
1
0.6862
0.4991
0.1265
1967
1.12
1.077
0.9849
0.6945
0.503
0.1281
107
1968
20.88
19.86
15.83
9.651
6.959
1.776
1969
2.351
2.242
1.859
1.168
0.8414
0.2166
1970
1.388
1.316
1.121
0.727
0.5292
0.1347
1971
1.12
1.078
0.9168
0.6933
0.5111
0.1303
1972
5.858
5.641
4.769
2.867
2.039
0.5123
1973
1.121
1.067
0.9254
0.6102
0.4365
0.1107
1974
1.12
1.065
0.8652
0.5562
0.4056
0.1032
1975
1.274
1.223
1.081
0.707
0.5091
0.1288
1976
1.292
1.219
0.9869
0.767
0.5599
0.1423
1977
1.12
1.063
0.8971
0.5519
0.3965
0.1004
1978
1.82
1.744
1.43
0.9332
0.6727
0.1703
1979
2.055
1.969
1.516
1.022
0.7505
0.1913
1980
2.178
2.072
1.624
1.082
0.7943
0.201
1981
2.698
2.579
2.072
1.331
0.9619
0.2441
1982
1.506
1.447
1.168
0.8112
0.5886
0.1498
1983
12.98
12.29
9.934
6.287
4.525
1.141
1984
2.516
2.397
1.95
1.153
0.8147
0.2056
1985
3.616
3.388
2.566
1.574
1.181
0.3014
1986
11.98
11.58
9.418
5.552
3.97
1.005
1987
1.123
1.069
0.874
0.5412
0.3867
0.09932
1988
1.12
1.078
0.9095
0.5406
0.3858
0.09688
1989
1.12
1.076
0.9677
0.712
0.516
0.1311
1990
1.12
1.07
0.8834
0.5597
0.4034
0.1022
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
20.88
19.86
15.83
9.651
6.959
1.776
0.0645161290322581
12.98
12.29
9.934
6.287
4.525
1.141
0.0967741935483871
11.98
11.58
9.418
5.552
3.97
1.005
0.129032258064516
5.858
5.641
4.769
2.867
2.039
0.5123
0.161290322580645
3.616
3.388
2.566
1.574
1.181
0.3014
0.193548387096774
2.698
2.579
2.072
1.331
0.9619
0.2441
0.225806451612903
2.516
2.397
1.95
1.187
0.8611
0.2186
0.258064516129032
2.408
2.302
1.875
1.168
0.8414
0.2166
0.290322580645161
2.351
2.242
1.859
1.153
0.8147
0.2056
0.32258064516129
2.178
2.072
1.624
1.082
0.7943
0.201
0.354838709677419
2.055
1.969
1.516
1.022
0.7505
0.1913
0.387096774193548
1.82
1.744
1.43
0.9332
0.6727
0.1703
0.419354838709677
1.506
1.447
1.168
0.8112
0.5886
0.1498
0.451612903225806
1.388
1.316
1.121
0.767
0.5599
0.1423
0.483870967741936
1.3
1.247
1.081
0.727
0.5292
0.1347
0.516129032258065
1.292
1.223
1.063
0.712
0.516
0.1311
0.548387096774194
1.274
1.219
1
0.707
0.5111
0.1303
0.580645161290323
1.123
1.081
0.9869
0.6945
0.5091
0.1288
0.612903225806452
1.121
1.08
0.9849
0.6943
0.5048
0.1281
0.645161290322581
1.121
1.078
0.9677
0.6933
0.503
0.1277
0.67741935483871
1.12
1.078
0.9465
0.6862
0.4991
0.1265
0.709677419354839
1.12
1.077
0.9254
0.6528
0.4771
0.1216
0.741935483870968
1.12
1.076
0.9199
0.6102
0.4365
0.1107
0.774193548387097
1.12
1.074
0.9168
0.5643
0.4065
0.1036
0.806451612903226
1.12
1.07
0.9095
0.5597
0.4056
0.1032
0.838709677419355
1.12
1.07
0.8971
0.5562
0.4034
0.1022
0.870967741935484
1.12
1.069
0.8841
0.5519
0.3965
0.1004
0.903225806451613
1.12
1.067
0.8834
0.5435
0.3896
0.09932
108
0.935483870967742
1.12
1.065
0.874
0.5412
0.3867
0.09904
0.967741935483871
1.12
1.063
0.8652
0.5406
0.3858
0.09688
0.1
11.3678
10.9861
8.9531
5.2835
3.7769
0.95573
Average
of
yearly
averages:
0.277314666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicPAalfalfaground
Metfile:
w14737.
dvf
PRZM
scenario:
PAalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicPAalfalfaaerial.
out
Chemical:
dicamba
PRZM
environment:
PAalfalfaC.
txt
modified
Satday,
12
October
2002
at
17:
24:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14737.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
12
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
5.679
5.515
4.676
3.044
2.213
0.5597
1962
5.602
5.352
4.42
2.717
1.945
0.494
1963
5.602
5.369
4.541
2.962
2.154
0.5483
1964
6.35
6.069
5.287
3.335
2.407
0.6103
109
1965
5.602
5.399
4.598
2.82
2.031
0.5168
1966
5.602
5.404
4.71
3.135
2.274
0.576
1967
5.602
5.382
4.629
3.116
2.248
0.5722
1968
23.64
22.49
17.92
11.11
8.268
2.108
1969
6.468
6.168
5.29
3.285
2.36
0.5999
1970
5.602
5.311
4.528
2.836
2.057
0.5226
1971
5.602
5.391
4.583
3.06
2.225
0.565
1972
10.06
9.69
8.193
4.986
3.544
0.8906
1973
5.602
5.328
4.394
2.805
2.002
0.5052
1974
5.601
5.323
4.318
2.709
1.968
0.5003
1975
5.602
5.377
4.684
2.901
2.079
0.5254
1976
5.601
5.325
4.445
2.943
2.122
0.5374
1977
5.601
5.316
4.322
2.599
1.863
0.471
1978
5.812
5.57
4.982
3.126
2.243
0.5675
1979
5.601
5.365
4.907
3.175
2.301
0.5842
1980
5.602
5.338
4.859
3.172
2.296
0.579
1981
6.357
6.075
5.32
3.453
2.471
0.6256
1982
5.603
5.38
4.774
3.004
2.16
0.5478
1983
16.85
15.96
12.97
8.187
5.891
1.486
1984
6.831
6.508
5.38
3.164
2.234
0.5613
1985
6.32
5.998
4.86
3.604
2.634
0.6682
1986
15.83
15.31
12.43
7.385
5.284
1.337
1987
5.604
5.335
4.353
2.681
1.915
0.4845
1988
5.602
5.387
4.547
2.697
1.924
0.483
1989
5.602
5.38
4.587
2.908
2.083
0.5277
1990
5.602
5.351
4.416
2.724
1.956
0.495
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
23.64
22.49
17.92
11.11
8.268
2.108
0.0645161290322581
16.85
15.96
12.97
8.187
5.891
1.486
0.0967741935483871
15.83
15.31
12.43
7.385
5.284
1.337
0.129032258064516
10.06
9.69
8.193
4.986
3.544
0.8906
0.161290322580645
6.831
6.508
5.38
3.604
2.634
0.6682
0.193548387096774
6.468
6.168
5.32
3.453
2.471
0.6256
0.225806451612903
6.357
6.075
5.29
3.335
2.407
0.6103
0.258064516129032
6.35
6.069
5.287
3.285
2.36
0.5999
0.290322580645161
6.32
5.998
4.982
3.175
2.301
0.5842
0.32258064516129
5.812
5.57
4.907
3.172
2.296
0.579
0.354838709677419
5.679
5.515
4.86
3.164
2.274
0.576
0.387096774193548
5.604
5.404
4.859
3.135
2.248
0.5722
0.419354838709677
5.603
5.399
4.774
3.126
2.243
0.5675
0.451612903225806
5.602
5.391
4.71
3.116
2.234
0.565
0.483870967741936
5.602
5.387
4.684
3.06
2.225
0.5613
0.516129032258065
5.602
5.382
4.676
3.044
2.213
0.5597
0.548387096774194
5.602
5.38
4.629
3.004
2.16
0.5483
0.580645161290323
5.602
5.38
4.598
2.962
2.154
0.5478
0.612903225806452
5.602
5.377
4.587
2.943
2.122
0.5374
0.645161290322581
5.602
5.369
4.583
2.908
2.083
0.5277
0.67741935483871
5.602
5.365
4.547
2.901
2.079
0.5254
0.709677419354839
5.602
5.352
4.541
2.836
2.057
0.5226
0.741935483870968
5.602
5.351
4.528
2.82
2.031
0.5168
0.774193548387097
5.602
5.338
4.445
2.805
2.002
0.5052
0.806451612903226
5.602
5.335
4.42
2.724
1.968
0.5003
110
0.838709677419355
5.602
5.328
4.416
2.717
1.956
0.495
0.870967741935484
5.601
5.325
4.394
2.709
1.945
0.494
0.903225806451613
5.601
5.323
4.353
2.697
1.924
0.4845
0.935483870967742
5.601
5.316
4.322
2.681
1.915
0.483
0.967741935483871
5.601
5.311
4.318
2.599
1.863
0.471
0.1
15.253
14.748
12.0063
7.1451
5.11
1.29236
Average
of
yearly
averages:
0.668316666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicPAalfalfaaerial
Metfile:
w14737.
dvf
PRZM
scenario:
PAalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Texas
Alfalfa
stored
as
dicTXalfalfaground.
out
Chemical:
dicamba
PRZM
environment:
TXalfalfaC.
txt
modified
Satday,
12
October
2002
at
17:
27:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)
111
Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.351
2.109
1.393
0.8916
0.6263
0.1556
1962
29.91
27.54
18.47
9.431
6.532
1.623
1963
2.902
2.528
1.772
1.381
1.091
0.2899
1964
11.85
10.84
8.083
4.275
3.095
0.7736
1965
23.07
20.23
15.2
9.042
6.287
1.567
1966
34.37
31.89
22.6
12.23
8.488
2.111
1967
32.33
28.85
20.79
10.8
7.432
1.848
1968
18.03
16.64
12.67
6.324
4.436
1.106
1969
18.63
16.89
14.23
7.854
5.482
1.365
1970
31.43
27.84
17.63
8.399
6.2
1.559
1971
13.6
12.53
8.998
4.817
3.507
0.8886
1972
43.32
38.28
24.03
11.63
7.997
1.986
1973
34
31.63
23.46
12.51
8.678
2.158
1974
23.68
20.76
13.91
7.284
5.118
1.278
1975
86.96
79.61
50.49
23.28
15.83
3.934
1976
128
116
77.19
38.57
26.43
6.55
1977
116
109
76.9
38.85
26.57
6.591
1978
59.41
52.36
33.51
15.69
10.71
2.666
1979
11.86
10.51
7.226
4.657
3.27
0.814
1980
41.86
38.58
27.81
13.82
9.449
2.337
1981
9.512
8.322
6.19
3.945
2.764
0.6876
1982
52.51
48.23
32.69
15.83
10.8
2.678
1983
45.18
40.53
28.24
13.77
9.443
2.372
1984
4.971
4.431
3.098
1.662
1.305
0.3402
1985
3.125
2.865
2.014
1.398
1.077
0.2718
1986
49.93
44.16
30.19
14.55
9.969
2.479
1987
14.49
12.73
7.426
4.092
2.975
0.7529
1988
11.75
10.74
8.606
6.034
4.269
1.065
1989
42.35
38.83
28.42
14.72
10.06
2.494
1990
66.32
60.49
43.4
20.46
13.89
3.446
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
128
116
77.19
38.85
26.57
6.591
0.0645161290322581
116
109
76.9
38.57
26.43
6.55
0.0967741935483871
86.96
79.61
50.49
23.28
15.83
3.934
0.129032258064516
66.32
60.49
43.4
20.46
13.89
3.446
0.161290322580645
59.41
52.36
33.51
15.83
10.8
2.678
0.193548387096774
52.51
48.23
32.69
15.69
10.71
2.666
0.225806451612903
49.93
44.16
30.19
14.72
10.06
2.494
0.258064516129032
45.18
40.53
28.42
14.55
9.969
2.479
0.290322580645161
43.32
38.83
28.24
13.82
9.449
2.372
0.32258064516129
42.35
38.58
27.81
13.77
9.443
2.337
0.354838709677419
41.86
38.28
24.03
12.51
8.678
2.158
0.387096774193548
34.37
31.89
23.46
12.23
8.488
2.111
0.419354838709677
34
31.63
22.6
11.63
7.997
1.986
0.451612903225806
32.33
28.85
20.79
10.8
7.432
1.848
0.483870967741936
31.43
27.84
18.47
9.431
6.532
1.623
0.516129032258065
29.91
27.54
17.63
9.042
6.287
1.567
0.548387096774194
23.68
20.76
15.2
8.399
6.2
1.559
0.580645161290323
23.07
20.23
14.23
7.854
5.482
1.365
0.612903225806452
18.63
16.89
13.91
7.284
5.118
1.278
0.645161290322581
18.03
16.64
12.67
6.324
4.436
1.106
112
0.67741935483871
14.49
12.73
8.998
6.034
4.269
1.065
0.709677419354839
13.6
12.53
8.606
4.817
3.507
0.8886
0.741935483870968
11.86
10.84
8.083
4.657
3.27
0.814
0.774193548387097
11.85
10.74
7.426
4.275
3.095
0.7736
0.806451612903226
11.75
10.51
7.226
4.092
2.975
0.7529
0.838709677419355
9.512
8.322
6.19
3.945
2.764
0.6876
0.870967741935484
4.971
4.431
3.098
1.662
1.305
0.3402
0.903225806451613
3.125
2.865
2.014
1.398
1.091
0.2899
0.935483870967742
2.902
2.528
1.772
1.381
1.077
0.2718
0.967741935483871
2.351
2.109
1.393
0.8916
0.6263
0.1556
0.1
84.896
77.698
49.781
22.998
15.636
3.8852
Average
of
yearly
averages:
1.93957333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXalfalfaground
Metfile:
w13958.
dvf
PRZM
scenario:
TXalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicTXalfalfaerial.
out
Chemical:
dicamba
PRZM
environment:
TXalfalfaC.
txt
modified
Satday,
12
October
2002
at
17:
27:
00
113
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
5.6
5.177
3.773
2.395
1.645
0.4076
1962
31.4
28.91
19.38
10.42
7.277
1.807
1963
5.601
5.023
3.307
2.244
1.934
0.498
1964
14.13
12.93
9.459
5.385
3.958
0.9863
1965
23.3
20.43
16.17
9.862
6.951
1.731
1966
35.81
33.3
23.55
13.17
9.153
2.276
1967
33.87
30.23
21.61
11.55
7.999
1.988
1968
18.6
17.12
13.28
7.384
5.247
1.306
1969
20.36
18.46
15.17
8.841
6.219
1.548
1970
31.13
27.58
17.46
9.341
6.946
1.743
1971
17.39
16.02
11.51
6.138
4.399
1.109
1972
43.61
38.53
24.19
12.33
8.58
2.13
1973
36.83
34.26
25.41
13.65
9.457
2.351
1974
24.05
21.09
14.56
8.309
5.87
1.464
1975
85.92
78.64
49.87
23.34
16.12
4.007
1976
127
115
76.35
38.24
26.28
6.512
1977
116
109
76.65
38.72
26.48
6.568
1978
59.06
52.05
33.28
16.06
11.22
2.792
1979
13.73
12.4
9.439
5.937
4.138
1.029
1980
43.16
39.78
28.56
14.63
10.08
2.494
1981
9.889
8.652
6.653
5.117
3.549
0.8817
1982
53.68
49.29
33.4
16.52
11.31
2.804
1983
44.9
40.27
28.02
13.82
10.17
2.55
1984
5.602
5.118
3.577
2.938
2.22
0.5658
1985
5.906
5.414
4.579
2.811
2.035
0.509
1986
50.05
44.26
30.16
14.99
10.51
2.612
1987
14.29
12.55
7.404
4.961
3.834
0.965
1988
13.76
12.58
9.771
7.088
5.125
1.277
1989
44.43
40.75
29.67
15.46
10.58
2.625
1990
66.35
60.52
43.24
20.8
14.26
3.538
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
127
115
76.65
38.72
26.48
6.568
0.0645161290322581
116
109
76.35
38.24
26.28
6.512
0.0967741935483871
85.92
78.64
49.87
23.34
16.12
4.007
0.129032258064516
66.35
60.52
43.24
20.8
14.26
3.538
0.161290322580645
59.06
52.05
33.4
16.52
11.31
2.804
0.193548387096774
53.68
49.29
33.28
16.06
11.22
2.792
0.225806451612903
50.05
44.26
30.16
15.46
10.58
2.625
0.258064516129032
44.9
40.75
29.67
14.99
10.51
2.612
0.290322580645161
44.43
40.27
28.56
14.63
10.17
2.55
0.32258064516129
43.61
39.78
28.02
13.82
10.08
2.494
0.354838709677419
43.16
38.53
25.41
13.65
9.457
2.351
0.387096774193548
36.83
34.26
24.19
13.17
9.153
2.276
0.419354838709677
35.81
33.3
23.55
12.33
8.58
2.13
0.451612903225806
33.87
30.23
21.61
11.55
7.999
1.988
0.483870967741936
31.4
28.91
19.38
10.42
7.277
1.807
0.516129032258065
31.13
27.58
17.46
9.862
6.951
1.743
114
0.548387096774194
24.05
21.09
16.17
9.341
6.946
1.731
0.580645161290323
23.3
20.43
15.17
8.841
6.219
1.548
0.612903225806452
20.36
18.46
14.56
8.309
5.87
1.464
0.645161290322581
18.6
17.12
13.28
7.384
5.247
1.306
0.67741935483871
17.39
16.02
11.51
7.088
5.125
1.277
0.709677419354839
14.29
12.93
9.771
6.138
4.399
1.109
0.741935483870968
14.13
12.58
9.459
5.937
4.138
1.029
0.774193548387097
13.76
12.55
9.439
5.385
3.958
0.9863
0.806451612903226
13.73
12.4
7.404
5.117
3.834
0.965
0.838709677419355
9.889
8.652
6.653
4.961
3.549
0.8817
0.870967741935484
5.906
5.414
4.579
2.938
2.22
0.5658
0.903225806451613
5.602
5.177
3.773
2.811
2.035
0.509
0.935483870967742
5.601
5.118
3.577
2.395
1.934
0.498
0.967741935483871
5.6
5.023
3.307
2.244
1.645
0.4076
0.1
83.963
76.828
49.207
23.086
15.934
3.9601
Average
of
yearly
averages:
2.10248
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXalfalfaerial
Metfile:
w13958.
dvf
PRZM
scenario:
TXalfalfaC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)
115
Dicamba
North
Dakota
Wheat
stored
as
dicNDwheatground.
out
Chemical:
dicamba
PRZM
environment:
NDwheatC.
txt
modified
Satday,
12
October
2002
at
17:
15:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.208
1.158
1.003
0.7245
0.5531
0.1471
1962
1.985
1.833
1.463
0.9368
0.7374
0.2013
1963
2.004
1.868
1.355
0.7484
0.5645
0.1531
1964
1.265
1.154
0.8026
0.52
0.4587
0.1272
1965
1.016
0.9449
0.7239
0.4912
0.3909
0.1072
1966
0.839
0.7767
0.5739
0.3666
0.2987
0.08101
1967
1.974
1.845
1.406
1.073
0.834
0.2278
1968
1.239
1.155
0.9126
0.6247
0.4989
0.1375
1969
2.64
2.525
2.006
1.226
0.9239
0.2502
1970
2.65
2.475
1.88
1.099
0.8118
0.2196
1971
0.877
0.8065
0.6156
0.3985
0.326
0.0898
1972
1.742
1.63
1.289
0.9116
0.6856
0.1901
1973
0.4571
0.4289
0.3198
0.2456
0.202
0.05693
1974
3.07
2.955
2.457
1.608
1.191
0.3185
1975
2.421
2.196
1.507
0.8198
0.6547
0.1872
1976
0.4041
0.3766
0.2716
0.2125
0.1621
0.04454
1977
30.78
27.84
18.89
9.987
7.132
1.824
1978
2.408
2.221
1.611
0.9292
0.7815
0.2261
1979
1.935
1.787
1.375
0.8208
0.7111
0.2048
1980
0.382
0.3555
0.309
0.2279
0.1828
0.0518
1981
2.572
2.512
2.125
1.373
0.9955
0.2667
1982
1.219
1.152
0.9941
0.7916
0.6197
0.1686
1983
1.225
1.171
0.9832
0.732
0.5702
0.1517
1984
2.297
2.142
1.558
0.8705
0.6454
0.1755
1985
2.346
2.201
1.714
1.268
0.9753
0.2721
1986
1.895
1.789
1.417
1.183
0.9074
0.2465
1987
0.6237
0.5763
0.4732
0.334
0.2731
0.08732
1988
0.4981
0.4486
0.3333
0.2577
0.206
0.07001
1989
0.928
0.8754
0.7858
0.559
0.4341
0.1373
1990
6.956
6.387
4.571
2.52
1.894
0.5038
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
30.78
27.84
18.89
9.987
7.132
1.824
0.0645161290322581
6.956
6.387
4.571
2.52
1.894
0.5038
0.0967741935483871
3.07
2.955
2.457
1.608
1.191
0.3185
0.129032258064516
2.65
2.525
2.125
1.373
0.9955
0.2721
0.161290322580645
2.64
2.512
2.006
1.268
0.9753
0.2667
0.193548387096774
2.572
2.475
1.88
1.226
0.9239
0.2502
0.225806451612903
2.421
2.221
1.714
1.183
0.9074
0.2465
0.258064516129032
2.408
2.201
1.611
1.099
0.834
0.2278
0.290322580645161
2.346
2.196
1.558
1.073
0.8118
0.2261
0.32258064516129
2.297
2.142
1.507
0.9368
0.7815
0.2196
0.354838709677419
2.004
1.868
1.463
0.9292
0.7374
0.2048
116
0.387096774193548
1.985
1.845
1.417
0.9116
0.7111
0.2013
0.419354838709677
1.974
1.833
1.406
0.8705
0.6856
0.1901
0.451612903225806
1.935
1.789
1.375
0.8208
0.6547
0.1872
0.483870967741936
1.895
1.787
1.355
0.8198
0.6454
0.1755
0.516129032258065
1.742
1.63
1.289
0.7916
0.6197
0.1686
0.548387096774194
1.265
1.171
1.003
0.7484
0.5702
0.1531
0.580645161290323
1.239
1.158
0.9941
0.732
0.5645
0.1517
0.612903225806452
1.225
1.155
0.9832
0.7245
0.5531
0.1471
0.645161290322581
1.219
1.154
0.9126
0.6247
0.4989
0.1375
0.67741935483871
1.208
1.152
0.8026
0.559
0.4587
0.1373
0.709677419354839
1.016
0.9449
0.7858
0.52
0.4341
0.1272
0.741935483870968
0.928
0.8754
0.7239
0.4912
0.3909
0.1072
0.774193548387097
0.877
0.8065
0.6156
0.3985
0.326
0.0898
0.806451612903226
0.839
0.7767
0.5739
0.3666
0.2987
0.08732
0.838709677419355
0.6237
0.5763
0.4732
0.334
0.2731
0.08101
0.870967741935484
0.4981
0.4486
0.3333
0.2577
0.206
0.07001
0.903225806451613
0.4571
0.4289
0.3198
0.2456
0.202
0.05693
0.935483870967742
0.4041
0.3766
0.309
0.2279
0.1828
0.0518
0.967741935483871
0.382
0.3555
0.2716
0.2125
0.1621
0.04454
0.1
3.028
2.912
2.4238
1.5845
1.17145
0.31386
Average
of
yearly
averages:
0.230843666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicNDwheatground
Metfile:
w14914.
dvf
PRZM
scenario:
NDwheatC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
117
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicNDwheataerial.
out
Chemical:
dicamba
PRZM
environment:
NDwheatC.
txt
modified
Satday,
12
October
2002
at
17:
15:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.634
2.452
1.79
1.545
1.179
0.3092
1962
3.105
2.867
2.296
1.622
1.347
0.3608
1963
3.573
3.331
2.403
1.534
1.197
0.3168
1964
2.062
1.905
1.483
1.271
1.031
0.2759
1965
2.532
2.364
1.861
1.364
1.08
0.2914
1966
2.228
2.063
1.73
1.269
0.9903
0.2627
1967
3.314
3.097
2.558
1.923
1.561
0.4231
1968
2.513
2.392
2.043
1.495
1.203
0.3249
1969
4.166
3.966
3.147
1.99
1.628
0.4357
1970
4.234
3.954
2.934
1.807
1.453
0.3867
1971
2.245
2.069
1.691
1.24
0.9775
0.2625
1972
2.725
2.526
1.946
1.669
1.273
0.3446
1973
2.098
1.969
1.468
1.135
0.8962
0.2394
1974
3.834
3.702
3.07
2.403
1.839
0.4868
1975
2.969
2.694
1.846
1.437
1.235
0.3371
1976
2.015
1.877
1.354
1.057
0.8062
0.2118
1977
30.51
27.59
18.72
10.24
7.361
1.89
1978
3.173
2.927
2.124
1.629
1.386
0.3842
1979
2.67
2.466
1.861
1.609
1.386
0.3816
1980
1.905
1.773
1.357
1.032
0.8047
0.2152
1981
3.863
3.623
3.016
2.051
1.64
0.4376
1982
2.599
2.449
1.985
1.645
1.315
0.3541
1983
2.704
2.539
1.9
1.587
1.251
0.3286
1984
3.383
3.185
2.396
1.561
1.272
0.3385
1985
3.008
2.817
2.311
1.979
1.593
0.4396
1986
2.804
2.605
2.165
1.91
1.503
0.4039
1987
2.134
1.972
1.397
1.101
0.8504
0.2375
1988
1.914
1.751
1.252
0.9828
0.7388
0.2058
1989
2.477
2.317
1.732
1.373
1.078
0.3027
1990
8.281
7.603
5.441
3.155
2.455
0.6559
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
30.51
27.59
18.72
10.24
7.361
1.89
0.0645161290322581
8.281
7.603
5.441
3.155
2.455
0.6559
0.0967741935483871
4.234
3.966
3.147
2.403
1.839
0.4868
0.129032258064516
4.166
3.954
3.07
2.051
1.64
0.4396
0.161290322580645
3.863
3.702
3.016
1.99
1.628
0.4376
0.193548387096774
3.834
3.623
2.934
1.979
1.593
0.4357
0.225806451612903
3.573
3.331
2.558
1.923
1.561
0.4231
0.258064516129032
3.383
3.185
2.403
1.91
1.503
0.4039
118
0.290322580645161
3.314
3.097
2.396
1.807
1.453
0.3867
0.32258064516129
3.173
2.927
2.311
1.669
1.386
0.3842
0.354838709677419
3.105
2.867
2.296
1.645
1.386
0.3816
0.387096774193548
3.008
2.817
2.165
1.629
1.347
0.3608
0.419354838709677
2.969
2.694
2.124
1.622
1.315
0.3541
0.451612903225806
2.804
2.605
2.043
1.609
1.273
0.3446
0.483870967741936
2.725
2.539
1.985
1.587
1.272
0.3385
0.516129032258065
2.704
2.526
1.946
1.561
1.251
0.3371
0.548387096774194
2.67
2.466
1.9
1.545
1.235
0.3286
0.580645161290323
2.634
2.452
1.861
1.534
1.203
0.3249
0.612903225806452
2.599
2.449
1.861
1.495
1.197
0.3168
0.645161290322581
2.532
2.392
1.846
1.437
1.179
0.3092
0.67741935483871
2.513
2.364
1.79
1.373
1.08
0.3027
0.709677419354839
2.477
2.317
1.732
1.364
1.078
0.2914
0.741935483870968
2.245
2.069
1.73
1.271
1.031
0.2759
0.774193548387097
2.228
2.063
1.691
1.269
0.9903
0.2627
0.806451612903226
2.134
1.972
1.483
1.24
0.9775
0.2625
0.838709677419355
2.098
1.969
1.468
1.135
0.8962
0.2394
0.870967741935484
2.062
1.905
1.397
1.101
0.8504
0.2375
0.903225806451613
2.015
1.877
1.357
1.057
0.8062
0.2152
0.935483870967742
1.914
1.773
1.354
1.032
0.8047
0.2118
0.967741935483871
1.905
1.751
1.252
0.9828
0.7388
0.2058
0.1
4.2272
3.9648
3.1393
2.3678
1.8191
0.48208
Average
of
yearly
averages:
0.39482
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicNDwheataerial
Metfile:
w14914.
dvf
PRZM
scenario:
NDwheatC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
119
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Oregon
Wheat
stored
as
dicORwheatground.
out
Chemical:
dicamba
PRZM
environment:
ORwheatC.
txt
modified
Satday,
12
October
2002
at
17:
22:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w24232.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
10
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.151
1.063
0.8129
0.6294
0.6357
0.1894
1962
0.6739
0.6349
0.5176
0.4182
0.3383
0.09383
1963
4.116
3.889
3.154
2.1
1.578
0.4195
1964
1.463
1.376
1.075
0.6558
0.5037
0.1439
1965
1.057
0.9955
0.7795
0.4948
0.3984
0.1149
1966
0.4113
0.3881
0.3004
0.2307
0.1856
0.05072
1967
1.086
1.034
0.8616
0.6529
0.5025
0.1321
1968
3.153
2.961
2.303
1.382
1.028
0.2829
1969
0.7667
0.7199
0.5516
0.3696
0.3087
0.09504
1970
0.6473
0.6157
0.5022
0.4297
0.3348
0.08972
1971
0.446
0.4231
0.3362
0.2646
0.2218
0.06046
1972
3.475
3.311
2.717
1.777
1.298
0.3455
1973
0.5381
0.5077
0.4319
0.3352
0.2862
0.08161
1974
0.4197
0.3967
0.3066
0.236
0.1902
0.05154
1975
3.565
3.391
2.766
1.899
1.427
0.3764
1976
0.4173
0.3964
0.3183
0.2432
0.2088
0.05973
1977
0.664
0.6218
0.5075
0.352
0.2904
0.07932
1978
1.83
1.74
1.457
0.954
0.7125
0.1885
1979
3.741
3.611
2.941
2.018
1.518
0.3999
1980
0.6029
0.5701
0.4541
0.3293
0.2851
0.08187
1981
2.742
2.63
2.075
1.248
0.9216
0.258
1982
0.4103
0.3853
0.3119
0.2411
0.2049
0.05792
1983
1.261
1.193
0.9664
0.8564
0.678
0.1839
1984
4.57
4.369
3.58
2.62
2.013
0.5305
1985
3.925
3.722
2.828
1.598
1.154
0.3204
1986
3.204
3.039
2.454
1.639
1.242
0.3298
1987
0.5017
0.4705
0.3556
0.2514
0.2097
0.06065
1988
2.031
1.919
1.571
0.954
0.7023
0.1948
1989
0.4081
0.3839
0.2925
0.2262
0.1908
0.05387
1990
0.4458
0.4205
0.3294
0.2486
0.1982
0.0527
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
4.57
4.369
3.58
2.62
2.013
0.5305
0.0645161290322581
4.116
3.889
3.154
2.1
1.578
0.4195
0.0967741935483871
3.925
3.722
2.941
2.018
1.518
0.3999
120
0.129032258064516
3.741
3.611
2.828
1.899
1.427
0.3764
0.161290322580645
3.565
3.391
2.766
1.777
1.298
0.3455
0.193548387096774
3.475
3.311
2.717
1.639
1.242
0.3298
0.225806451612903
3.204
3.039
2.454
1.598
1.154
0.3204
0.258064516129032
3.153
2.961
2.303
1.382
1.028
0.2829
0.290322580645161
2.742
2.63
2.075
1.248
0.9216
0.258
0.32258064516129
2.031
1.919
1.571
0.954
0.7125
0.1948
0.354838709677419
1.83
1.74
1.457
0.954
0.7023
0.1894
0.387096774193548
1.463
1.376
1.075
0.8564
0.678
0.1885
0.419354838709677
1.261
1.193
0.9664
0.6558
0.6357
0.1839
0.451612903225806
1.151
1.063
0.8616
0.6529
0.5037
0.1439
0.483870967741936
1.086
1.034
0.8129
0.6294
0.5025
0.1321
0.516129032258065
1.057
0.9955
0.7795
0.4948
0.3984
0.1149
0.548387096774194
0.7667
0.7199
0.5516
0.4297
0.3383
0.09504
0.580645161290323
0.6739
0.6349
0.5176
0.4182
0.3348
0.09383
0.612903225806452
0.664
0.6218
0.5075
0.3696
0.3087
0.08972
0.645161290322581
0.6473
0.6157
0.5022
0.352
0.2904
0.08187
0.67741935483871
0.6029
0.5701
0.4541
0.3352
0.2862
0.08161
0.709677419354839
0.5381
0.5077
0.4319
0.3293
0.2851
0.07932
0.741935483870968
0.5017
0.4705
0.3556
0.2646
0.2218
0.06065
0.774193548387097
0.446
0.4231
0.3362
0.2514
0.2097
0.06046
0.806451612903226
0.4458
0.4205
0.3294
0.2486
0.2088
0.05973
0.838709677419355
0.4197
0.3967
0.3183
0.2432
0.2049
0.05792
0.870967741935484
0.4173
0.3964
0.3119
0.2411
0.1982
0.05387
0.903225806451613
0.4113
0.3881
0.3066
0.236
0.1908
0.0527
0.935483870967742
0.4103
0.3853
0.3004
0.2307
0.1902
0.05154
0.967741935483871
0.4081
0.3839
0.2925
0.2262
0.1856
0.05072
0.1
3.9066
3.7109
2.9297
2.0061
1.5089
0.39755
Average
of
yearly
averages:
0.179312666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicORwheatground
Metfile:
w24232.
dvf
PRZM
scenario:
ORwheatC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
121
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicORwheataerial.
out
Chemical:
dicamba
PRZM
environment:
ORwheatC.
txt
modified
Satday,
12
October
2002
at
17:
22:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w24232.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
10
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.454
2.313
1.764
1.532
1.346
0.378
1962
2.275
2.211
1.778
1.385
1.124
0.309
1963
4.929
4.684
3.783
2.897
2.261
0.6097
1964
2.892
2.719
2.192
1.487
1.248
0.3462
1965
2.136
2.012
1.795
1.363
1.166
0.3219
1966
2.055
1.94
1.501
1.152
0.9272
0.2514
1967
2.557
2.406
1.821
1.535
1.206
0.3184
1968
4.644
4.362
3.393
2.104
1.727
0.4744
1969
1.979
1.85
1.378
1.123
0.9734
0.2743
1970
2.278
2.142
1.637
1.322
1.039
0.2786
1971
2.114
2.005
1.594
1.226
1.001
0.27
1972
4.091
3.878
3.461
2.507
1.976
0.5285
1973
2.156
2.034
1.618
1.236
1.014
0.2791
1974
2.098
1.983
1.533
1.18
0.9487
0.2562
1975
4.525
4.304
3.511
2.765
2.139
0.5717
1976
2.083
1.979
1.589
1.212
1.005
0.2789
1977
2.259
2.167
1.728
1.294
1.047
0.2842
1978
2.995
2.808
2.185
1.772
1.377
0.3652
1979
4.597
4.421
3.605
2.808
2.17
0.5754
1980
2.09
1.983
1.681
1.271
1.063
0.2938
1981
3.944
3.791
2.983
1.943
1.626
0.4544
1982
2.048
1.923
1.465
1.132
0.9099
0.2477
1983
2.519
2.373
2.057
1.698
1.382
0.3741
1984
5.518
5.27
4.318
3.466
2.702
0.7168
1985
5.127
4.84
3.674
2.215
1.803
0.4997
1986
4.206
3.99
3.223
2.472
1.91
0.5102
1987
2.094
1.963
1.484
1.12
0.8981
0.245
1988
3.535
3.381
2.717
1.719
1.441
0.3929
1989
2.038
1.917
1.461
1.125
0.9096
0.249
1990
2.088
1.97
1.526
1.168
0.9277
0.2463
Sorted
results
122
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
5.518
5.27
4.318
3.466
2.702
0.7168
0.0645161290322581
5.127
4.84
3.783
2.897
2.261
0.6097
0.0967741935483871
4.929
4.684
3.674
2.808
2.17
0.5754
0.129032258064516
4.644
4.421
3.605
2.765
2.139
0.5717
0.161290322580645
4.597
4.362
3.511
2.507
1.976
0.5285
0.193548387096774
4.525
4.304
3.461
2.472
1.91
0.5102
0.225806451612903
4.206
3.99
3.393
2.215
1.803
0.4997
0.258064516129032
4.091
3.878
3.223
2.104
1.727
0.4744
0.290322580645161
3.944
3.791
2.983
1.943
1.626
0.4544
0.32258064516129
3.535
3.381
2.717
1.772
1.441
0.3929
0.354838709677419
2.995
2.808
2.192
1.719
1.382
0.378
0.387096774193548
2.892
2.719
2.185
1.698
1.377
0.3741
0.419354838709677
2.557
2.406
2.057
1.535
1.346
0.3652
0.451612903225806
2.519
2.373
1.821
1.532
1.248
0.3462
0.483870967741936
2.454
2.313
1.795
1.487
1.206
0.3219
0.516129032258065
2.278
2.211
1.778
1.385
1.166
0.3184
0.548387096774194
2.275
2.167
1.764
1.363
1.124
0.309
0.580645161290323
2.259
2.142
1.728
1.322
1.063
0.2938
0.612903225806452
2.156
2.034
1.681
1.294
1.047
0.2842
0.645161290322581
2.136
2.012
1.637
1.271
1.039
0.2791
0.67741935483871
2.114
2.005
1.618
1.236
1.014
0.2789
0.709677419354839
2.098
1.983
1.594
1.226
1.005
0.2786
0.741935483870968
2.094
1.983
1.589
1.212
1.001
0.2743
0.774193548387097
2.09
1.979
1.533
1.18
0.9734
0.27
0.806451612903226
2.088
1.97
1.526
1.168
0.9487
0.2562
0.838709677419355
2.083
1.963
1.501
1.152
0.9277
0.2514
0.870967741935484
2.055
1.94
1.484
1.132
0.9272
0.249
0.903225806451613
2.048
1.923
1.465
1.125
0.9099
0.2477
0.935483870967742
2.038
1.917
1.461
1.123
0.9096
0.2463
0.967741935483871
1.979
1.85
1.378
1.12
0.8981
0.245
0.1
4.9005
4.6577
3.6671
2.8037
2.1669
0.57503
Average
of
yearly
averages:
0.373366666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicORwheataerial
Metfile:
w24232.
dvf
PRZM
scenario:
ORwheatC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
123
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Texas
Wheat
stored
as
dicTXwheatground.
out
Chemical:
dicamba
PRZM
environment:
TXwheatC.
txt
modified
Satday,
12
October
2002
at
17:
30:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.22
1.961
1.143
0.5724
0.4248
0.1065
1962
12.18
11.23
6.792
3.018
2.06
0.5142
1963
0.3675
0.3242
0.2044
0.1643
0.1194
0.03035
1964
0.784
0.6981
0.3863
0.3181
0.2419
0.0605
1965
1.835
1.614
0.9905
0.5912
0.4155
0.1034
1966
3.227
2.957
2.073
1.259
0.9025
0.225
1967
0.4238
0.3735
0.2487
0.1856
0.1696
0.04393
1968
5.827
5.253
3.389
1.782
1.229
0.3045
1969
3.42
2.996
1.821
0.9078
0.669
0.1678
1970
3.414
3.028
1.992
0.9981
0.6983
0.1739
1971
1.276
1.11
0.652
0.3346
0.2701
0.06944
1972
20.02
17.78
11.31
5.366
3.648
0.902
1973
0.3461
0.3092
0.2095
0.1629
0.1177
0.03021
1974
6.52
5.738
3.621
1.738
1.184
0.2936
1975
2.194
1.907
1.128
0.546
0.4205
0.1067
1976
3.318
3.007
2.143
1.148
0.7984
0.1983
1977
0.3528
0.3129
0.1905
0.1502
0.1066
0.02674
1978
18.89
16.68
10.47
5.198
3.543
0.8778
1979
9.256
8.197
5.181
2.549
1.735
0.4304
1980
0.7819
0.7068
0.4865
0.3103
0.2131
0.05302
1981
4.28
3.631
1.872
1.074
0.7474
0.1857
1982
2.411
2.131
1.429
1.086
0.7896
0.1974
1983
4.389
3.911
2.469
1.847
1.309
0.3279
124
1984
1.113
0.9875
0.5931
0.3175
0.2372
0.05961
1985
4.481
3.882
2.384
1.086
0.7881
0.1981
1986
18.81
16.67
10.67
5.354
3.654
0.9055
1987
2.491
2.299
1.359
0.7801
0.5613
0.1407
1988
4.661
4.115
2.523
1.288
0.9235
0.2307
1989
5.939
5.207
3.264
1.899
1.34
0.3341
1990
18.1
16.02
10.09
6.046
4.178
1.038
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
20.02
17.78
11.31
6.046
4.178
1.038
0.0645161290322581
18.89
16.68
10.67
5.366
3.654
0.9055
0.0967741935483871
18.81
16.67
10.47
5.354
3.648
0.902
0.129032258064516
18.1
16.02
10.09
5.198
3.543
0.8778
0.161290322580645
12.18
11.23
6.792
3.018
2.06
0.5142
0.193548387096774
9.256
8.197
5.181
2.549
1.735
0.4304
0.225806451612903
6.52
5.738
3.621
1.899
1.34
0.3341
0.258064516129032
5.939
5.253
3.389
1.847
1.309
0.3279
0.290322580645161
5.827
5.207
3.264
1.782
1.229
0.3045
0.32258064516129
4.661
4.115
2.523
1.738
1.184
0.2936
0.354838709677419
4.481
3.911
2.469
1.288
0.9235
0.2307
0.387096774193548
4.389
3.882
2.384
1.259
0.9025
0.225
0.419354838709677
4.28
3.631
2.143
1.148
0.7984
0.1983
0.451612903225806
3.42
3.028
2.073
1.086
0.7896
0.1981
0.483870967741936
3.414
3.007
1.992
1.086
0.7881
0.1974
0.516129032258065
3.318
2.996
1.872
1.074
0.7474
0.1857
0.548387096774194
3.227
2.957
1.821
0.9981
0.6983
0.1739
0.580645161290323
2.491
2.299
1.429
0.9078
0.669
0.1678
0.612903225806452
2.411
2.131
1.359
0.7801
0.5613
0.1407
0.645161290322581
2.22
1.961
1.143
0.5912
0.4248
0.1067
0.67741935483871
2.194
1.907
1.128
0.5724
0.4205
0.1065
0.709677419354839
1.835
1.614
0.9905
0.546
0.4155
0.1034
0.741935483870968
1.276
1.11
0.652
0.3346
0.2701
0.06944
0.774193548387097
1.113
0.9875
0.5931
0.3181
0.2419
0.0605
0.806451612903226
0.784
0.7068
0.4865
0.3175
0.2372
0.05961
0.838709677419355
0.7819
0.6981
0.3863
0.3103
0.2131
0.05302
0.870967741935484
0.4238
0.3735
0.2487
0.1856
0.1696
0.04393
0.903225806451613
0.3675
0.3242
0.2095
0.1643
0.1194
0.03035
0.935483870967742
0.3528
0.3129
0.2044
0.1629
0.1177
0.03021
0.967741935483871
0.3461
0.3092
0.1905
0.1502
0.1066
0.02674
0.1
18.739
16.605
10.432
5.3384
3.6375
0.89958
Average
of
yearly
averages:
0.277866666666666
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXwheatground
Metfile:
w13958.
dvf
PRZM
scenario:
TXwheatC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
125
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicTXwheataerial.
out
Chemical:
dicamba
PRZM
environment:
TXwheatC.
txt
modified
Satday,
12
October
2002
at
17:
30:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.772
2.474
1.627
1.067
0.7709
0.1924
1962
12.87
11.87
7.162
3.231
2.36
0.5888
1963
1.694
1.494
0.9043
0.7131
0.506
0.1265
1964
1.726
1.523
1.005
0.8295
0.5953
0.148
1965
2.38
2.092
1.391
1.097
0.7772
0.1937
1966
4.228
3.862
2.687
1.814
1.298
0.3237
1967
1.758
1.549
0.9163
0.7297
0.5551
0.1399
1968
6.589
5.924
3.807
2.26
1.575
0.3908
1969
4.413
3.865
2.415
1.42
1.052
0.2632
1970
3.755
3.331
2.399
1.511
1.066
0.2658
1971
1.682
1.484
0.8833
0.822
0.6514
0.1643
1972
20.34
18.06
11.49
5.686
3.882
0.9606
1973
1.709
1.526
0.9725
0.7584
0.5432
0.1364
1974
7.39
6.504
4.091
2.202
1.518
0.377
1975
2.793
2.427
1.592
1.033
0.7745
0.195
1976
4.022
3.646
2.63
1.698
1.192
0.2964
1977
1.7
1.508
0.9182
0.7217
0.5112
0.1275
1978
19.18
16.94
10.63
5.503
3.766
0.9335
1979
10.02
8.87
5.605
2.996
2.055
0.5101
126
1980
1.807
1.583
1.125
0.8354
0.5799
0.1439
1981
5.302
4.468
2.339
1.48
1.024
0.2544
1982
3.138
2.774
1.858
1.549
1.132
0.2826
1983
5.266
4.687
3.097
2.292
1.673
0.4186
1984
2.01
1.768
1.264
0.8489
0.6118
0.1526
1985
5.18
4.488
2.778
1.534
1.144
0.2867
1986
19.18
17
10.87
5.678
3.89
0.9643
1987
3.43
3.171
1.932
1.251
0.8908
0.2227
1988
5.675
5.004
3.102
1.765
1.296
0.3233
1989
6.564
5.755
3.595
2.314
1.649
0.4111
1990
18.37
16.26
10.24
6.278
4.361
1.084
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
20.34
18.06
11.49
6.278
4.361
1.084
0.0645161290322581
19.18
17
10.87
5.686
3.89
0.9643
0.0967741935483871
19.18
16.94
10.63
5.678
3.882
0.9606
0.129032258064516
18.37
16.26
10.24
5.503
3.766
0.9335
0.161290322580645
12.87
11.87
7.162
3.231
2.36
0.5888
0.193548387096774
10.02
8.87
5.605
2.996
2.055
0.5101
0.225806451612903
7.39
6.504
4.091
2.314
1.673
0.4186
0.258064516129032
6.589
5.924
3.807
2.292
1.649
0.4111
0.290322580645161
6.564
5.755
3.595
2.26
1.575
0.3908
0.32258064516129
5.675
5.004
3.102
2.202
1.518
0.377
0.354838709677419
5.302
4.687
3.097
1.814
1.298
0.3237
0.387096774193548
5.266
4.488
2.778
1.765
1.296
0.3233
0.419354838709677
5.18
4.468
2.687
1.698
1.192
0.2964
0.451612903225806
4.413
3.865
2.63
1.549
1.144
0.2867
0.483870967741936
4.228
3.862
2.415
1.534
1.132
0.2826
0.516129032258065
4.022
3.646
2.399
1.511
1.066
0.2658
0.548387096774194
3.755
3.331
2.339
1.48
1.052
0.2632
0.580645161290323
3.43
3.171
1.932
1.42
1.024
0.2544
0.612903225806452
3.138
2.774
1.858
1.251
0.8908
0.2227
0.645161290322581
2.793
2.474
1.627
1.097
0.7772
0.195
0.67741935483871
2.772
2.427
1.592
1.067
0.7745
0.1937
0.709677419354839
2.38
2.092
1.391
1.033
0.7709
0.1924
0.741935483870968
2.01
1.768
1.264
0.8489
0.6514
0.1643
0.774193548387097
1.807
1.583
1.125
0.8354
0.6118
0.1526
0.806451612903226
1.758
1.549
1.005
0.8295
0.5953
0.148
0.838709677419355
1.726
1.526
0.9725
0.822
0.5799
0.1439
0.870967741935484
1.709
1.523
0.9182
0.7584
0.5551
0.1399
0.903225806451613
1.7
1.508
0.9163
0.7297
0.5432
0.1364
0.935483870967742
1.694
1.494
0.9043
0.7217
0.5112
0.1275
0.967741935483871
1.682
1.484
0.8833
0.7131
0.506
0.1265
0.1
19.099
16.872
10.591
5.6605
3.8704
0.95789
Average
of
yearly
averages:
0.362593333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXwheataerial
Metfile:
w13958.
dvf
PRZM
scenario:
TXwheatC.
txt
127
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
California
Corn
stored
as
dicCAcornground.
out
Chemical:
dicamba
PRZM
environment:
CAcornC.
txt
modified
Satday,
12
October
2002
at
16:
32:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w23232.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
22
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.295
0.2772
0.2146
0.1616
0.1224
0.03179
1962
0.2957
0.2765
0.2112
0.1598
0.1239
0.05383
1963
0.3016
0.2835
0.2203
0.1692
0.1321
0.0379
1964
0.2957
0.2775
0.2145
0.1637
0.1279
0.03998
1965
0.3348
0.3129
0.2386
0.2089
0.1625
0.04736
1966
0.2858
0.2663
0.2005
0.1527
0.1173
0.04749
1967
0.3285
0.3064
0.2321
0.1924
0.1486
0.04345
1968
0.2915
0.2725
0.2075
0.1581
0.1208
0.03117
1969
0.2964
0.2752
0.205
0.1621
0.126
0.03757
1970
0.2902
0.2684
0.1968
0.1553
0.1189
0.03167
1971
0.3003
0.2824
0.2201
0.168
0.131
0.03398
1972
0.2903
0.27
0.202
0.1563
0.1198
0.03102
128
1973
0.2826
0.2606
0.1889
0.1471
0.1104
0.02873
1974
0.2967
0.278
0.2137
0.164
0.1335
0.03981
1975
0.2952
0.2729
0.1996
0.1591
0.1206
0.03172
1976
0.2845
0.2617
0.1881
0.1486
0.1117
0.02863
1977
0.3475
0.3283
0.2599
0.1964
0.1527
0.04354
1978
0.438
0.416
0.3356
0.2591
0.1939
0.05016
1979
0.2907
0.2697
0.1999
0.156
0.1191
0.0333
1980
0.2931
0.2749
0.2123
0.1619
0.128
0.03447
1981
0.3121
0.2913
0.2206
0.1774
0.1335
0.03497
1982
0.2934
0.274
0.2084
0.1614
0.1281
0.03558
1983
0.3942
0.3685
0.2808
0.2403
0.1834
0.04866
1984
0.2824
0.2592
0.185
0.1468
0.1113
0.03422
1985
0.2902
0.2717
0.2079
0.1569
0.119
0.03172
1986
0.2903
0.2703
0.2027
0.1565
0.1202
0.03101
1987
0.2799
0.2581
0.1873
0.1454
0.1109
0.03825
1988
1.282
1.225
0.9636
0.6325
0.4612
0.1204
1989
1.185
1.089
0.7873
0.4699
0.3544
0.1212
1990
1.481
1.377
0.9833
0.5383
0.4044
0.116
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
1.481
1.377
0.9833
0.6325
0.4612
0.1212
0.0645161290322581
1.282
1.225
0.9636
0.5383
0.4044
0.1204
0.0967741935483871
1.185
1.089
0.7873
0.4699
0.3544
0.116
0.129032258064516
0.438
0.416
0.3356
0.2591
0.1939
0.05383
0.161290322580645
0.3942
0.3685
0.2808
0.2403
0.1834
0.05016
0.193548387096774
0.3475
0.3283
0.2599
0.2089
0.1625
0.04866
0.225806451612903
0.3348
0.3129
0.2386
0.1964
0.1527
0.04749
0.258064516129032
0.3285
0.3064
0.2321
0.1924
0.1486
0.04736
0.290322580645161
0.3121
0.2913
0.2206
0.1774
0.1335
0.04354
0.32258064516129
0.3016
0.2835
0.2203
0.1692
0.1335
0.04345
0.354838709677419
0.3003
0.2824
0.2201
0.168
0.1321
0.03998
0.387096774193548
0.2967
0.278
0.2146
0.164
0.131
0.03981
0.419354838709677
0.2964
0.2775
0.2145
0.1637
0.1281
0.03825
0.451612903225806
0.2957
0.2772
0.2137
0.1621
0.128
0.0379
0.483870967741936
0.2957
0.2765
0.2123
0.1619
0.1279
0.03757
0.516129032258065
0.2952
0.2752
0.2112
0.1616
0.126
0.03558
0.548387096774194
0.295
0.2749
0.2084
0.1614
0.1239
0.03497
0.580645161290323
0.2934
0.274
0.2079
0.1598
0.1224
0.03447
0.612903225806452
0.2931
0.2729
0.2075
0.1591
0.1208
0.03422
0.645161290322581
0.2915
0.2725
0.205
0.1581
0.1206
0.03398
0.67741935483871
0.2907
0.2717
0.2027
0.1569
0.1202
0.0333
0.709677419354839
0.2903
0.2703
0.202
0.1565
0.1198
0.03179
0.741935483870968
0.2903
0.27
0.2005
0.1563
0.1191
0.03172
0.774193548387097
0.2902
0.2697
0.1999
0.156
0.119
0.03172
0.806451612903226
0.2902
0.2684
0.1996
0.1553
0.1189
0.03167
0.838709677419355
0.2858
0.2663
0.1968
0.1527
0.1173
0.03117
0.870967741935484
0.2845
0.2617
0.1889
0.1486
0.1117
0.03102
0.903225806451613
0.2826
0.2606
0.1881
0.1471
0.1113
0.03101
0.935483870967742
0.2824
0.2592
0.1873
0.1468
0.1109
0.02873
0.967741935483871
0.2799
0.2581
0.185
0.1454
0.1104
0.02863
0.1
1.1103
1.0217
0.74213
0.44882
0.33835
0.109783
Average
of
yearly
averages:
0.0456526666666667
129
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicCAcornground
Metfile:
w23232.
dvf
PRZM
scenario:
CAcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicCAcornaerial.
out
Chemical:
dicamba
PRZM
environment:
CAcornC.
txt
modified
Satday,
12
October
2002
at
16:
32:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w23232.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
22
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.475
1.386
1.073
0.8079
0.6118
0.1564
1962
1.459
1.368
1.055
0.7983
0.6193
0.1812
1963
1.502
1.412
1.097
0.8399
0.6558
0.1739
1964
1.479
1.388
1.073
0.8184
0.6397
0.1719
1965
1.509
1.41
1.075
0.8549
0.6743
0.181
1966
1.428
1.331
1.002
0.763
0.5862
0.1682
1967
1.534
1.431
1.083
0.8611
0.669
0.1771
1968
1.457
1.363
1.037
0.7902
0.6039
0.1553
1969
1.46
1.356
1.01
0.7917
0.6162
0.164
1970
1.45
1.341
0.9834
0.7752
0.5934
0.1536
130
1971
1.501
1.412
1.1
0.8397
0.655
0.1694
1972
1.452
1.35
1.01
0.7815
0.5992
0.1542
1973
1.413
1.303
0.9444
0.7354
0.5521
0.1416
1974
1.484
1.39
1.068
0.8199
0.6441
0.1723
1975
1.475
1.364
0.9977
0.7949
0.6025
0.155
1976
1.422
1.308
0.9406
0.7426
0.5584
0.1427
1977
1.526
1.441
1.141
0.8524
0.6636
0.1761
1978
1.538
1.425
1.053
0.8804
0.6728
0.1738
1979
1.453
1.348
0.9992
0.7797
0.5951
0.1556
1980
1.465
1.374
1.061
0.8087
0.6394
0.1677
1981
1.485
1.386
1.049
0.8122
0.6141
0.1583
1982
1.467
1.37
1.042
0.8067
0.6405
0.1704
1983
1.566
1.464
1.115
0.8803
0.6788
0.1769
1984
1.412
1.296
0.9247
0.734
0.5562
0.1473
1985
1.449
1.357
1.038
0.7826
0.5937
0.1533
1986
1.452
1.351
1.014
0.7825
0.6008
0.1551
1987
1.399
1.291
0.9363
0.7268
0.5543
0.1526
1988
1.958
1.882
1.474
1.231
0.9187
0.2367
1989
1.417
1.317
0.9838
0.7516
0.5788
0.2369
1990
2.157
2.006
1.445
1.018
0.8528
0.2305
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
2.157
2.006
1.474
1.231
0.9187
0.2369
0.0645161290322581
1.958
1.882
1.445
1.018
0.8528
0.2367
0.0967741935483871
1.566
1.464
1.141
0.8804
0.6788
0.2305
0.129032258064516
1.538
1.441
1.115
0.8803
0.6743
0.1812
0.161290322580645
1.534
1.431
1.1
0.8611
0.6728
0.181
0.193548387096774
1.526
1.425
1.097
0.8549
0.669
0.1771
0.225806451612903
1.509
1.412
1.083
0.8524
0.6636
0.1769
0.258064516129032
1.502
1.412
1.075
0.8399
0.6558
0.1761
0.290322580645161
1.501
1.41
1.073
0.8397
0.655
0.1739
0.32258064516129
1.485
1.39
1.073
0.8199
0.6441
0.1738
0.354838709677419
1.484
1.388
1.068
0.8184
0.6405
0.1723
0.387096774193548
1.479
1.386
1.061
0.8122
0.6397
0.1719
0.419354838709677
1.475
1.386
1.055
0.8087
0.6394
0.1704
0.451612903225806
1.475
1.374
1.053
0.8079
0.6193
0.1694
0.483870967741936
1.467
1.37
1.049
0.8067
0.6162
0.1682
0.516129032258065
1.465
1.368
1.042
0.7983
0.6141
0.1677
0.548387096774194
1.46
1.364
1.038
0.7949
0.6118
0.164
0.580645161290323
1.459
1.363
1.037
0.7917
0.6039
0.1583
0.612903225806452
1.457
1.357
1.014
0.7902
0.6025
0.1564
0.645161290322581
1.453
1.356
1.01
0.7826
0.6008
0.1556
0.67741935483871
1.452
1.351
1.01
0.7825
0.5992
0.1553
0.709677419354839
1.452
1.35
1.002
0.7815
0.5951
0.1551
0.741935483870968
1.45
1.348
0.9992
0.7797
0.5937
0.155
0.774193548387097
1.449
1.341
0.9977
0.7752
0.5934
0.1542
0.806451612903226
1.428
1.331
0.9838
0.763
0.5862
0.1536
0.838709677419355
1.422
1.317
0.9834
0.7516
0.5788
0.1533
0.870967741935484
1.417
1.308
0.9444
0.7426
0.5584
0.1526
0.903225806451613
1.413
1.303
0.9406
0.7354
0.5562
0.1473
0.935483870967742
1.412
1.296
0.9363
0.734
0.5543
0.1427
0.967741935483871
1.399
1.291
0.9247
0.7268
0.5521
0.1416
131
0.1
1.5632
1.4617
1.1384
0.88039
0.67835
0.22557
Average
of
yearly
averages:
0.1703
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicCAcornaerial
Metfile:
w23232.
dvf
PRZM
scenario:
CAcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Illinois
Corn
stored
as
dicILcornground.
out
Chemical:
dicamba
PRZM
environment:
ILCornC.
txt
modified
Satday,
12
October
2002
at
17:
01:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14923.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
40
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.3737
0.3523
0.276
0.2297
0.1869
0.05038
1962
2.899
2.738
1.941
1.101
0.8521
0.2263
1963
2.848
2.676
2.058
1.315
1.014
0.2601
1964
2.415
2.294
1.795
1.137
0.9091
0.2371
132
1965
3.612
3.418
2.597
1.573
1.128
0.2868
1966
10.11
9.434
7.246
3.94
3.036
0.7767
1967
1.633
1.449
0.918
0.5927
0.5146
0.1427
1968
0.6506
0.6296
0.5371
0.4594
0.3478
0.08951
1969
1.427
1.359
1.105
0.7952
0.5929
0.1501
1970
5.6
5.041
3.416
1.764
1.314
0.3436
1971
2.874
2.743
2.206
1.624
1.159
0.2949
1972
11.13
10.6
8.932
5.472
3.99
1.008
1973
2.624
2.428
1.81
1.379
1.031
0.2648
1974
13.33
12.78
9.262
4.745
3.398
0.877
1975
1.037
0.9658
0.7508
0.6619
0.5057
0.1346
1976
1.395
1.336
1.083
0.8755
0.6687
0.1729
1977
3.622
3.322
2.36
1.231
0.8904
0.2308
1978
0.3207
0.2997
0.2347
0.1891
0.1491
0.03989
1979
1.118
1.073
0.9234
0.6738
0.515
0.1331
1980
5.37
4.982
3.754
2.035
1.416
0.3652
1981
0.3259
0.2951
0.2275
0.1903
0.1683
0.04625
1982
7.494
7.196
6.004
3.83
2.789
0.7043
1983
0.3336
0.3154
0.2492
0.1818
0.1671
0.04764
1984
1.62
1.525
1.1
0.9185
0.6913
0.178
1985
1.201
1.135
0.8803
0.5841
0.4344
0.1119
1986
3.25
3.003
2.209
1.324
0.9587
0.2453
1987
7.077
6.502
4.592
2.305
1.609
0.4145
1988
2.233
2.073
1.488
0.7884
0.5828
0.1529
1989
1.211
1.156
0.9359
0.7119
0.5353
0.1377
1990
1.456
1.354
1.01
0.9
0.6734
0.1728
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
13.33
12.78
9.262
5.472
3.99
1.008
0.0645161290322581
11.13
10.6
8.932
4.745
3.398
0.877
0.0967741935483871
10.11
9.434
7.246
3.94
3.036
0.7767
0.129032258064516
7.494
7.196
6.004
3.83
2.789
0.7043
0.161290322580645
7.077
6.502
4.592
2.305
1.609
0.4145
0.193548387096774
5.6
5.041
3.754
2.035
1.416
0.3652
0.225806451612903
5.37
4.982
3.416
1.764
1.314
0.3436
0.258064516129032
3.622
3.418
2.597
1.624
1.159
0.2949
0.290322580645161
3.612
3.322
2.36
1.573
1.128
0.2868
0.32258064516129
3.25
3.003
2.209
1.379
1.031
0.2648
0.354838709677419
2.899
2.743
2.206
1.324
1.014
0.2601
0.387096774193548
2.874
2.738
2.058
1.315
0.9587
0.2453
0.419354838709677
2.848
2.676
1.941
1.231
0.9091
0.2371
0.451612903225806
2.624
2.428
1.81
1.137
0.8904
0.2308
0.483870967741936
2.415
2.294
1.795
1.101
0.8521
0.2263
0.516129032258065
2.233
2.073
1.488
0.9185
0.6913
0.178
0.548387096774194
1.633
1.525
1.105
0.9
0.6734
0.1729
0.580645161290323
1.62
1.449
1.1
0.8755
0.6687
0.1728
0.612903225806452
1.456
1.359
1.083
0.7952
0.5929
0.1529
0.645161290322581
1.427
1.354
1.01
0.7884
0.5828
0.1501
0.67741935483871
1.395
1.336
0.9359
0.7119
0.5353
0.1427
0.709677419354839
1.211
1.156
0.9234
0.6738
0.515
0.1377
0.741935483870968
1.201
1.135
0.918
0.6619
0.5146
0.1346
0.774193548387097
1.118
1.073
0.8803
0.5927
0.5057
0.1331
0.806451612903226
1.037
0.9658
0.7508
0.5841
0.4344
0.1119
133
0.838709677419355
0.6506
0.6296
0.5371
0.4594
0.3478
0.08951
0.870967741935484
0.3737
0.3523
0.276
0.2297
0.1869
0.05038
0.903225806451613
0.3336
0.3154
0.2492
0.1903
0.1683
0.04764
0.935483870967742
0.3259
0.2997
0.2347
0.1891
0.1671
0.04625
0.967741935483871
0.3207
0.2951
0.2275
0.1818
0.1491
0.03989
0.1
9.8484
9.2102
7.1218
3.929
3.0113
0.76946
Average
of
yearly
averages:
0.276525666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicILcornground
Metfile:
w14923.
dvf
PRZM
scenario:
ILCornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicILcornaerial.
out
Chemical:
dicamba
PRZM
environment:
ILCornC.
txt
modified
Satday,
12
October
2002
at
17:
01:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14923.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
40
Water
segment
concentrations
(
ppb)
134
Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.631
1.538
1.205
0.9447
0.728
0.1877
1962
3.477
3.272
2.316
1.557
1.275
0.3352
1963
3.866
3.632
2.797
1.911
1.477
0.3774
1964
3.023
2.885
2.249
1.646
1.323
0.3422
1965
4.11
3.886
2.951
2.067
1.543
0.3931
1966
10.93
10.2
7.815
4.388
3.417
0.8744
1967
2.109
1.871
1.34
1.217
1.013
0.27
1968
1.861
1.761
1.432
1.149
0.8765
0.2251
1969
2.177
2.074
1.687
1.426
1.079
0.2737
1970
6.101
5.492
3.722
2.054
1.676
0.4355
1971
3.398
3.243
2.717
2.162
1.623
0.4122
1972
11.51
10.96
9.213
5.873
4.295
1.086
1973
3.17
2.955
2.27
1.882
1.409
0.3613
1974
13.84
13.27
9.601
4.936
3.677
0.954
1975
1.914
1.783
1.583
1.296
1.001
0.261
1976
2.133
2.011
1.706
1.485
1.159
0.2988
1977
4.573
4.195
2.979
1.647
1.298
0.3342
1978
1.523
1.423
1.088
0.8517
0.6538
0.1696
1979
1.999
1.871
1.491
1.315
1.013
0.261
1980
6.272
5.82
4.37
2.399
1.85
0.4778
1981
1.497
1.415
1.119
0.8557
0.677
0.1771
1982
8.027
7.708
6.431
4.307
3.164
0.8005
1983
1.555
1.47
1.161
0.8652
0.6758
0.176
1984
2.42
2.273
1.895
1.511
1.163
0.298
1985
1.943
1.797
1.336
1.17
0.8857
0.2283
1986
4.193
3.874
2.879
1.783
1.378
0.3514
1987
7.731
7.103
5.017
2.6
1.99
0.5124
1988
3.033
2.815
2.022
1.296
1.048
0.2705
1989
2.055
1.934
1.572
1.352
1.041
0.2674
1990
2.231
2.075
1.789
1.492
1.129
0.289
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
13.84
13.27
9.601
5.873
4.295
1.086
0.0645161290322581
11.51
10.96
9.213
4.936
3.677
0.954
0.0967741935483871
10.93
10.2
7.815
4.388
3.417
0.8744
0.129032258064516
8.027
7.708
6.431
4.307
3.164
0.8005
0.161290322580645
7.731
7.103
5.017
2.6
1.99
0.5124
0.193548387096774
6.272
5.82
4.37
2.399
1.85
0.4778
0.225806451612903
6.101
5.492
3.722
2.162
1.676
0.4355
0.258064516129032
4.573
4.195
2.979
2.067
1.623
0.4122
0.290322580645161
4.193
3.886
2.951
2.054
1.543
0.3931
0.32258064516129
4.11
3.874
2.879
1.911
1.477
0.3774
0.354838709677419
3.866
3.632
2.797
1.882
1.409
0.3613
0.387096774193548
3.477
3.272
2.717
1.783
1.378
0.3514
0.419354838709677
3.398
3.243
2.316
1.647
1.323
0.3422
0.451612903225806
3.17
2.955
2.27
1.646
1.298
0.3352
0.483870967741936
3.033
2.885
2.249
1.557
1.275
0.3342
0.516129032258065
3.023
2.815
2.022
1.511
1.163
0.2988
0.548387096774194
2.42
2.273
1.895
1.492
1.159
0.298
0.580645161290323
2.231
2.075
1.789
1.485
1.129
0.289
0.612903225806452
2.177
2.074
1.706
1.426
1.079
0.2737
0.645161290322581
2.133
2.011
1.687
1.352
1.048
0.2705
135
0.67741935483871
2.109
1.934
1.583
1.315
1.041
0.27
0.709677419354839
2.055
1.871
1.572
1.296
1.013
0.2674
0.741935483870968
1.999
1.871
1.491
1.296
1.013
0.261
0.774193548387097
1.943
1.797
1.432
1.217
1.001
0.261
0.806451612903226
1.914
1.783
1.34
1.17
0.8857
0.2283
0.838709677419355
1.861
1.761
1.336
1.149
0.8765
0.2251
0.870967741935484
1.631
1.538
1.205
0.9447
0.728
0.1877
0.903225806451613
1.555
1.47
1.161
0.8652
0.677
0.1771
0.935483870967742
1.523
1.423
1.119
0.8557
0.6758
0.176
0.967741935483871
1.497
1.415
1.088
0.8517
0.6538
0.1696
0.1
10.6397
9.9508
7.6766
4.3799
3.3917
0.86701
Average
of
yearly
averages:
0.390026666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicILcornaerial
Metfile:
w14923.
dvf
PRZM
scenario:
ILCornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Mississippi
Corn
stored
as
dicMScornground.
out
136
Chemical:
dicamba
PRZM
environment:
MScornC.
txt
modified
Satday,
12
October
2002
at
17:
06:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13893.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
20
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
12.54
11.74
8.988
5.168
3.632
0.9107
1962
0.6376
0.5832
0.4286
0.2664
0.1912
0.05403
1963
2.41
2.224
1.648
0.921
0.6544
0.2703
1964
4.037
3.717
2.581
1.386
0.965
0.247
1965
2.399
2.189
1.455
0.7087
0.5122
0.1332
1966
2.365
2.207
1.866
1.106
0.7825
0.2006
1967
1.919
1.784
1.354
0.7887
0.5622
0.1643
1968
1.099
1.008
0.7094
0.3571
0.2735
0.07222
1969
2.483
2.267
1.584
0.876
0.6097
0.1525
1970
4.366
4.019
3.168
1.741
1.212
0.3276
1971
1.4
1.313
0.9898
0.6112
0.4338
0.1121
1972
1.429
1.306
0.9807
0.5564
0.426
0.1126
1973
2.528
2.321
1.713
1.017
0.7095
0.2542
1974
4.704
4.352
3.128
1.776
1.258
0.3167
1975
1.016
0.9637
0.7826
0.465
0.3347
0.1016
1976
2.269
2.014
1.282
0.6453
0.4676
0.1707
1977
2.149
1.968
1.409
0.7836
0.5422
0.1952
1978
5.03
4.581
3.203
1.582
1.101
0.2788
1979
3.042
2.82
1.94
1.078
0.7564
0.1893
1980
1.977
1.725
1.059
0.5689
0.4127
0.1268
1981
1.596
1.458
1.03
0.6268
0.4507
0.1204
1982
6.678
6.283
4.864
2.597
1.793
0.4584
1983
8.795
8.256
6.242
3.115
2.258
0.5695
1984
2.074
1.881
1.393
0.7542
0.535
0.165
1985
7.418
6.818
4.825
2.558
1.769
0.472
1986
0.5365
0.4956
0.3583
0.2515
0.1778
0.07215
1987
1.398
1.258
0.8381
0.4591
0.3279
0.1049
1988
3.378
3.151
2.358
1.297
0.8976
0.2553
1989
0.2754
0.2524
0.1789
0.1389
0.1107
0.03089
1990
2.983
2.789
2.359
1.383
0.9622
0.2405
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
12.54
11.74
8.988
5.168
3.632
0.9107
0.0645161290322581
8.795
8.256
6.242
3.115
2.258
0.5695
0.0967741935483871
7.418
6.818
4.864
2.597
1.793
0.472
0.129032258064516
6.678
6.283
4.825
2.558
1.769
0.4584
0.161290322580645
5.03
4.581
3.203
1.776
1.258
0.3276
0.193548387096774
4.704
4.352
3.168
1.741
1.212
0.3167
0.225806451612903
4.366
4.019
3.128
1.582
1.101
0.2788
0.258064516129032
4.037
3.717
2.581
1.386
0.965
0.2703
0.290322580645161
3.378
3.151
2.359
1.383
0.9622
0.2553
0.32258064516129
3.042
2.82
2.358
1.297
0.8976
0.2542
0.354838709677419
2.983
2.789
1.94
1.106
0.7825
0.247
0.387096774193548
2.528
2.321
1.866
1.078
0.7564
0.2405
0.419354838709677
2.483
2.267
1.713
1.017
0.7095
0.2006
0.451612903225806
2.41
2.224
1.648
0.921
0.6544
0.1952
137
0.483870967741936
2.399
2.207
1.584
0.876
0.6097
0.1893
0.516129032258065
2.365
2.189
1.455
0.7887
0.5622
0.1707
0.548387096774194
2.269
2.014
1.409
0.7836
0.5422
0.165
0.580645161290323
2.149
1.968
1.393
0.7542
0.535
0.1643
0.612903225806452
2.074
1.881
1.354
0.7087
0.5122
0.1525
0.645161290322581
1.977
1.784
1.282
0.6453
0.4676
0.1332
0.67741935483871
1.919
1.725
1.059
0.6268
0.4507
0.1268
0.709677419354839
1.596
1.458
1.03
0.6112
0.4338
0.1204
0.741935483870968
1.429
1.313
0.9898
0.5689
0.426
0.1126
0.774193548387097
1.4
1.306
0.9807
0.5564
0.4127
0.1121
0.806451612903226
1.398
1.258
0.8381
0.465
0.3347
0.1049
0.838709677419355
1.099
1.008
0.7826
0.4591
0.3279
0.1016
0.870967741935484
1.016
0.9637
0.7094
0.3571
0.2735
0.07222
0.903225806451613
0.6376
0.5832
0.4286
0.2664
0.1912
0.07215
0.935483870967742
0.5365
0.4956
0.3583
0.2515
0.1778
0.05403
0.967741935483871
0.2754
0.2524
0.1789
0.1389
0.1107
0.03089
0.1
7.344
6.7645
4.8601
2.5931
1.7906
0.47064
Average
of
yearly
averages:
0.229316333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMScornground
Metfile:
w13893.
dvf
PRZM
scenario:
MScornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
138
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicMScornaerial.
out
Chemical:
dicamba
PRZM
environment:
MScornC.
txt
modified
Satday,
12
October
2002
at
17:
06:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13893.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
20
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
12.88
12.06
9.236
5.546
3.923
0.9846
1962
1.547
1.38
0.9404
0.7773
0.5614
0.1467
1963
2.806
2.605
2.062
1.413
1.016
0.3571
1964
4.446
4.087
2.835
1.813
1.283
0.3265
1965
2.828
2.6
1.72
1.045
0.8549
0.219
1966
2.831
2.644
2.227
1.618
1.171
0.2979
1967
2.39
2.24
1.72
1.298
0.938
0.2583
1968
2.061
1.89
1.381
0.8876
0.6602
0.1689
1969
3.156
2.882
2.014
1.34
0.9486
0.2374
1970
4.906
4.565
3.556
2.182
1.542
0.4096
1971
1.998
1.874
1.413
1.169
0.8409
0.2142
1972
2.03
1.857
1.493
1.084
0.8113
0.209
1973
3.139
2.883
2.163
1.508
1.067
0.3408
1974
5.158
4.771
3.43
2.198
1.592
0.4006
1975
1.901
1.722
1.281
0.9814
0.7099
0.1951
1976
2.18
1.935
1.232
0.8436
0.6241
0.2732
1977
2.656
2.432
1.805
1.226
0.859
0.2719
1978
5.16
4.697
3.661
1.957
1.426
0.3601
1979
3.466
3.198
2.195
1.514
1.081
0.2708
1980
1.898
1.656
1.017
0.6295
0.4524
0.2124
1981
2.119
1.936
1.368
1.117
0.805
0.2087
1982
7.198
6.767
5.244
3.013
2.1
0.5349
1983
9.534
8.916
6.67
3.421
2.556
0.645
1984
2.456
2.226
1.845
1.248
0.8905
0.2525
1985
7.719
7.095
5.021
2.934
2.073
0.547
1986
1.438
1.307
0.9076
0.7598
0.5448
0.1626
1987
1.343
1.209
0.8053
0.6047
0.4353
0.1887
1988
4.032
3.76
2.815
1.777
1.245
0.3407
1989
1.376
1.261
0.8937
0.6933
0.5183
0.1333
1990
3.621
3.392
2.822
1.89
1.333
0.3334
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
12.88
12.06
9.236
5.546
3.923
0.9846
0.0645161290322581
9.534
8.916
6.67
3.421
2.556
0.645
0.0967741935483871
7.719
7.095
5.244
3.013
2.1
0.547
0.129032258064516
7.198
6.767
5.021
2.934
2.073
0.5349
0.161290322580645
5.16
4.771
3.661
2.198
1.592
0.4096
0.193548387096774
5.158
4.697
3.556
2.182
1.542
0.4006
0.225806451612903
4.906
4.565
3.43
1.957
1.426
0.3601
0.258064516129032
4.446
4.087
2.835
1.89
1.333
0.3571
0.290322580645161
4.032
3.76
2.822
1.813
1.283
0.3408
0.32258064516129
3.621
3.392
2.815
1.777
1.245
0.3407
139
0.354838709677419
3.466
3.198
2.227
1.618
1.171
0.3334
0.387096774193548
3.156
2.883
2.195
1.514
1.081
0.3265
0.419354838709677
3.139
2.882
2.163
1.508
1.067
0.2979
0.451612903225806
2.831
2.644
2.062
1.413
1.016
0.2732
0.483870967741936
2.828
2.605
2.014
1.34
0.9486
0.2719
0.516129032258065
2.806
2.6
1.845
1.298
0.938
0.2708
0.548387096774194
2.656
2.432
1.805
1.248
0.8905
0.2583
0.580645161290323
2.456
2.24
1.72
1.226
0.859
0.2525
0.612903225806452
2.39
2.226
1.72
1.169
0.8549
0.2374
0.645161290322581
2.18
1.936
1.493
1.117
0.8409
0.219
0.67741935483871
2.119
1.935
1.413
1.084
0.8113
0.2142
0.709677419354839
2.061
1.89
1.381
1.045
0.805
0.2124
0.741935483870968
2.03
1.874
1.368
0.9814
0.7099
0.209
0.774193548387097
1.998
1.857
1.281
0.8876
0.6602
0.2087
0.806451612903226
1.901
1.722
1.232
0.8436
0.6241
0.1951
0.838709677419355
1.898
1.656
1.017
0.7773
0.5614
0.1887
0.870967741935484
1.547
1.38
0.9404
0.7598
0.5448
0.1689
0.903225806451613
1.438
1.307
0.9076
0.6933
0.5183
0.1626
0.935483870967742
1.376
1.261
0.8937
0.6295
0.4524
0.1467
0.967741935483871
1.343
1.209
0.8053
0.6047
0.4353
0.1333
0.1
7.6669
7.0622
5.2217
3.0051
2.0973
0.54579
Average
of
yearly
averages:
0.316696666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMScornaerial
Metfile:
w13893.
dvf
PRZM
scenario:
MScornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
140
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
North
Carolina
Corn
stored
as
dicNCcornground.
out
Chemical:
dicamba
PRZM
environment:
NCcornWC.
txt
modified
Satday,
12
October
2002
at
17:
11:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w03812.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
50
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1965
2.074
1.92
1.464
0.8657
0.6769
0.1819
1966
2.013
1.884
1.438
0.8798
0.735
0.2003
1967
0.6936
0.6499
0.5153
0.336
0.274
0.07319
1968
0.8201
0.7486
0.6187
0.3926
0.311
0.08357
1969
6.258
5.903
4.931
3.137
2.256
0.5677
1970
0.3493
0.3263
0.2528
0.2325
0.1902
0.05141
1971
3.842
3.594
2.813
1.672
1.262
0.3287
1972
1.523
1.42
1.056
0.6991
0.523
0.1374
1973
3.103
2.855
2.007
1.108
0.8785
0.2315
1974
0.654
0.6054
0.548
0.4117
0.3223
0.08542
1975
6.361
6.049
4.568
2.503
1.765
0.4573
1976
10.55
9.749
7.27
4.056
2.861
0.736
1977
0.5285
0.494
0.402
0.3215
0.2587
0.0699
1978
0.3951
0.3675
0.3203
0.2845
0.2369
0.06304
1979
1.811
1.691
1.3
0.8751
0.647
0.1673
1980
8.348
7.773
5.751
2.989
2.068
0.5278
1981
1.436
1.332
1.009
0.5654
0.4234
0.1135
1982
0.6139
0.5698
0.4457
0.367
0.2888
0.07471
1983
1.552
1.479
1.166
0.7139
0.5605
0.1469
1984
1.648
1.531
1.099
0.6298
0.4892
0.1344
1985
2.619
2.508
2.006
1.287
0.9471
0.2447
1986
0.6119
0.5747
0.4245
0.2626
0.2202
0.0585
1987
4.801
4.571
3.723
2.528
1.902
0.4858
1988
0.2983
0.2802
0.2171
0.1661
0.1294
0.03609
1989
0.9929
0.9435
0.7478
0.4595
0.3604
0.09423
1990
0.8323
0.7738
0.5572
0.4362
0.3455
0.09098
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.037037037037037
10.55
9.749
7.27
4.056
2.861
0.736
0.0740740740740741
8.348
7.773
5.751
3.137
2.256
0.5677
0.111111111111111
6.361
6.049
4.931
2.989
2.068
0.5278
0.148148148148148
6.258
5.903
4.568
2.528
1.902
0.4858
0.185185185185185
4.801
4.571
3.723
2.503
1.765
0.4573
0.222222222222222
3.842
3.594
2.813
1.672
1.262
0.3287
0.259259259259259
3.103
2.855
2.007
1.287
0.9471
0.2447
0.296296296296296
2.619
2.508
2.006
1.108
0.8785
0.2315
141
0.333333333333333
2.074
1.92
1.464
0.8798
0.735
0.2003
0.37037037037037
2.013
1.884
1.438
0.8751
0.6769
0.1819
0.407407407407407
1.811
1.691
1.3
0.8657
0.647
0.1673
0.444444444444444
1.648
1.531
1.166
0.7139
0.5605
0.1469
0.481481481481481
1.552
1.479
1.099
0.6991
0.523
0.1374
0.518518518518518
1.523
1.42
1.056
0.6298
0.4892
0.1344
0.555555555555556
1.436
1.332
1.009
0.5654
0.4234
0.1135
0.592592592592593
0.9929
0.9435
0.7478
0.4595
0.3604
0.09423
0.62962962962963
0.8323
0.7738
0.6187
0.4362
0.3455
0.09098
0.666666666666667
0.8201
0.7486
0.5572
0.4117
0.3223
0.08542
0.703703703703704
0.6936
0.6499
0.548
0.3926
0.311
0.08357
0.740740740740741
0.654
0.6054
0.5153
0.367
0.2888
0.07471
0.777777777777778
0.6139
0.5747
0.4457
0.336
0.274
0.07319
0.814814814814815
0.6119
0.5698
0.4245
0.3215
0.2587
0.0699
0.851851851851852
0.5285
0.494
0.402
0.2845
0.2369
0.06304
0.888888888888889
0.3951
0.3675
0.3203
0.2626
0.2202
0.0585
0.925925925925926
0.3493
0.3263
0.2528
0.2325
0.1902
0.05141
0.962962962962963
0.2983
0.2802
0.2171
0.1661
0.1294
0.03609
0.1
6.9571
6.5662
5.177
3.0334
2.1244
0.53977
Average
of
yearly
averages:
0.209316923076923
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicNCcornground
Metfile:
w03812.
dvf
PRZM
scenario:
NCcornWC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
142
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicNCcornaerial.
out
Chemical:
dicamba
PRZM
environment:
NCcornWC.
txt
modified
Satday,
12
October
2002
at
17:
11:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w03812.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
50
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1965
2.872
2.658
2.054
1.37
1.13
0.2998
1966
2.726
2.551
1.957
1.438
1.216
0.3278
1967
1.598
1.495
1.316
0.9578
0.7649
0.2004
1968
1.522
1.431
1.308
0.9846
0.8176
0.2135
1969
6.782
6.396
5.362
3.628
2.631
0.6635
1970
1.515
1.415
1.08
0.8658
0.6799
0.1775
1971
4.884
4.57
3.555
2.197
1.706
0.4441
1972
2.491
2.321
1.838
1.261
0.9911
0.2576
1973
3.617
3.322
2.335
1.539
1.266
0.3314
1974
1.776
1.644
1.308
0.9842
0.7857
0.2058
1975
7.113
6.857
5.123
2.802
2.105
0.5575
1976
11.29
10.43
7.76
4.319
3.117
0.8293
1977
1.544
1.435
1.183
0.9151
0.7178
0.188
1978
1.555
1.453
1.145
0.9089
0.7199
0.1876
1979
2.318
2.164
1.734
1.413
1.094
0.2831
1980
9.058
8.425
6.217
3.259
2.393
0.6191
1981
2.106
1.953
1.63
1.077
0.8586
0.2248
1982
1.618
1.495
1.222
0.9754
0.7527
0.1931
1983
2.469
2.398
1.905
1.301
1.048
0.2725
1984
2.315
2.15
1.545
1.131
0.9663
0.2575
1985
3.361
3.209
2.564
1.888
1.416
0.3667
1986
1.468
1.37
1.199
0.8901
0.7045
0.1828
1987
5.456
5.194
4.23
3.062
2.296
0.5863
1988
1.488
1.398
1.083
0.8269
0.6446
0.1694
1989
1.891
1.781
1.474
1.058
0.8352
0.2153
1990
1.685
1.566
1.335
1.039
0.825
0.2136
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.037037037037037
11.29
10.43
7.76
4.319
3.117
0.8293
0.0740740740740741
9.058
8.425
6.217
3.628
2.631
0.6635
0.111111111111111
7.113
6.857
5.362
3.259
2.393
0.6191
0.148148148148148
6.782
6.396
5.123
3.062
2.296
0.5863
0.185185185185185
5.456
5.194
4.23
2.802
2.105
0.5575
0.222222222222222
4.884
4.57
3.555
2.197
1.706
0.4441
0.259259259259259
3.617
3.322
2.564
1.888
1.416
0.3667
0.296296296296296
3.361
3.209
2.335
1.539
1.266
0.3314
0.333333333333333
2.872
2.658
2.054
1.438
1.216
0.3278
0.37037037037037
2.726
2.551
1.957
1.413
1.13
0.2998
0.407407407407407
2.491
2.398
1.905
1.37
1.094
0.2831
143
0.444444444444444
2.469
2.321
1.838
1.301
1.048
0.2725
0.481481481481481
2.318
2.164
1.734
1.261
0.9911
0.2576
0.518518518518518
2.315
2.15
1.63
1.131
0.9663
0.2575
0.555555555555556
2.106
1.953
1.545
1.077
0.8586
0.2248
0.592592592592593
1.891
1.781
1.474
1.058
0.8352
0.2153
0.62962962962963
1.776
1.644
1.335
1.039
0.825
0.2136
0.666666666666667
1.685
1.566
1.316
0.9846
0.8176
0.2135
0.703703703703704
1.618
1.495
1.308
0.9842
0.7857
0.2058
0.740740740740741
1.598
1.495
1.308
0.9754
0.7649
0.2004
0.777777777777778
1.555
1.453
1.222
0.9578
0.7527
0.1931
0.814814814814815
1.544
1.435
1.199
0.9151
0.7199
0.188
0.851851851851852
1.522
1.431
1.183
0.9089
0.7178
0.1876
0.888888888888889
1.515
1.415
1.145
0.8901
0.7045
0.1828
0.925925925925926
1.488
1.398
1.083
0.8658
0.6799
0.1775
0.962962962962963
1.468
1.37
1.08
0.8269
0.6446
0.1694
0.1
7.6965
7.3274
5.6185
3.3697
2.4644
0.63242
Average
of
yearly
averages:
0.325692307692308
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicNCcornaerial
Metfile:
w03812.
dvf
PRZM
scenario:
NCcornWC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)
144
Dicamba
North
Dakota
Corn
stored
as
dicNDcornground.
out
Chemical:
dicamba
PRZM
environment:
NDcornC.
txt
modified
Satday,
12
October
2002
at
17:
14:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.8851
0.8605
0.7385
0.5655
0.4285
0.1175
1962
2.673
2.556
2.143
1.57
1.245
0.328
1963
1.807
1.715
1.372
0.7651
0.5647
0.1562
1964
4.513
4.322
3.533
2.238
1.702
0.4436
1965
1.389
1.321
1.096
0.6689
0.4981
0.1391
1966
0.6549
0.6258
0.5697
0.4818
0.3791
0.1011
1967
5.829
5.694
5.054
3.744
2.896
0.7656
1968
2.592
2.492
2.163
1.626
1.255
0.3355
1969
1.348
1.277
1.111
0.7801
0.5725
0.1592
1970
1.731
1.669
1.422
1.129
0.8679
0.2276
1971
1.82
1.726
1.339
0.799
0.6304
0.1746
1972
0.6292
0.5898
0.4929
0.3143
0.2573
0.07289
1973
0.5353
0.5091
0.4152
0.2755
0.2334
0.06394
1974
1.709
1.631
1.329
0.9383
0.7509
0.1993
1975
1.955
1.901
1.694
1.199
0.9956
0.267
1976
0.3291
0.3116
0.2489
0.1943
0.1524
0.04118
1977
5.73
5.193
3.622
2.025
1.437
0.3742
1978
0.5384
0.4966
0.3597
0.255
0.2254
0.06756
1979
3.645
3.514
3.035
2.193
1.674
0.4365
1980
0.3045
0.2847
0.218
0.1747
0.1469
0.0415
1981
4.384
4.165
3.369
1.991
1.424
0.3812
1982
0.3754
0.3549
0.2828
0.2164
0.1889
0.05614
1983
0.4026
0.3847
0.3181
0.2298
0.1938
0.05305
1984
1.019
0.9456
0.6889
0.442
0.3706
0.1046
1985
5.466
5.093
3.96
2.487
1.799
0.4824
1986
2.293
2.227
2.039
1.43
1.119
0.2999
1987
2.051
1.92
1.519
0.8404
0.6105
0.1642
1988
0.3074
0.2866
0.2415
0.1824
0.1453
0.04036
1989
1.628
1.535
1.305
0.7771
0.571
0.1527
1990
1.273
1.168
0.8334
0.6236
0.5009
0.1376
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
5.829
5.694
5.054
3.744
2.896
0.7656
0.0645161290322581
5.73
5.193
3.96
2.487
1.799
0.4824
0.0967741935483871
5.466
5.093
3.622
2.238
1.702
0.4436
0.129032258064516
4.513
4.322
3.533
2.193
1.674
0.4365
0.161290322580645
4.384
4.165
3.369
2.025
1.437
0.3812
0.193548387096774
3.645
3.514
3.035
1.991
1.424
0.3742
0.225806451612903
2.673
2.556
2.163
1.626
1.255
0.3355
0.258064516129032
2.592
2.492
2.143
1.57
1.245
0.328
0.290322580645161
2.293
2.227
2.039
1.43
1.119
0.2999
145
0.32258064516129
2.051
1.92
1.694
1.199
0.9956
0.267
0.354838709677419
1.955
1.901
1.519
1.129
0.8679
0.2276
0.387096774193548
1.82
1.726
1.422
0.9383
0.7509
0.1993
0.419354838709677
1.807
1.715
1.372
0.8404
0.6304
0.1746
0.451612903225806
1.731
1.669
1.339
0.799
0.6105
0.1642
0.483870967741936
1.709
1.631
1.329
0.7801
0.5725
0.1592
0.516129032258065
1.628
1.535
1.305
0.7771
0.571
0.1562
0.548387096774194
1.389
1.321
1.111
0.7651
0.5647
0.1527
0.580645161290323
1.348
1.277
1.096
0.6689
0.5009
0.1391
0.612903225806452
1.273
1.168
0.8334
0.6236
0.4981
0.1376
0.645161290322581
1.019
0.9456
0.7385
0.5655
0.4285
0.1175
0.67741935483871
0.8851
0.8605
0.6889
0.4818
0.3791
0.1046
0.709677419354839
0.6549
0.6258
0.5697
0.442
0.3706
0.1011
0.741935483870968
0.6292
0.5898
0.4929
0.3143
0.2573
0.07289
0.774193548387097
0.5384
0.5091
0.4152
0.2755
0.2334
0.06756
0.806451612903226
0.5353
0.4966
0.3597
0.255
0.2254
0.06394
0.838709677419355
0.4026
0.3847
0.3181
0.2298
0.1938
0.05614
0.870967741935484
0.3754
0.3549
0.2828
0.2164
0.1889
0.05305
0.903225806451613
0.3291
0.3116
0.2489
0.1943
0.1524
0.0415
0.935483870967742
0.3074
0.2866
0.2415
0.1824
0.1469
0.04118
0.967741935483871
0.3045
0.2847
0.218
0.1747
0.1453
0.04036
0.1
5.3707
5.0159
3.6131
2.2335
1.6992
0.44289
Average
of
yearly
averages:
0.212807333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicNDcornground
Metfile:
w14914.
dvf
PRZM
scenario:
NDcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
146
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicNDcornaerial.
out
Chemical:
dicamba
PRZM
environment:
NDcornC.
txt
modified
Satday,
12
October
2002
at
17:
14:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
09:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.07
1.966
1.589
1.314
1.02
0.2715
1962
3.798
3.611
2.985
2.229
1.764
0.4644
1963
2.675
2.539
1.981
1.333
1.13
0.3036
1964
5.076
4.862
3.974
2.788
2.151
0.5619
1965
2.601
2.473
2.031
1.288
1.074
0.2932
1966
1.957
1.87
1.609
1.258
1.01
0.2671
1967
6.39
6.235
5.557
4.399
3.437
0.9141
1968
3.228
3.103
2.682
2.304
1.821
0.4883
1969
2.5
2.369
1.984
1.345
1.141
0.3107
1970
2.461
2.362
2.043
1.83
1.438
0.377
1971
2.786
2.641
2.067
1.441
1.193
0.3241
1972
1.778
1.667
1.39
1.023
0.8097
0.2181
1973
1.627
1.547
1.406
1.041
0.8482
0.2269
1974
2.79
2.662
2.231
1.641
1.336
0.3523
1975
2.703
2.628
2.337
1.908
1.534
0.4062
1976
1.589
1.505
1.202
0.9237
0.7242
0.1904
1977
6.023
5.457
4.117
2.39
1.832
0.4776
1978
1.584
1.49
1.163
0.9113
0.7895
0.2153
1979
4.316
4.161
3.601
2.887
2.231
0.5834
1980
1.516
1.417
1.082
0.8521
0.6785
0.1812
1981
5.171
4.955
3.985
2.44
1.889
0.5215
1982
1.658
1.567
1.249
0.9726
0.8046
0.2209
1983
1.724
1.647
1.362
1.025
0.8285
0.2191
1984
1.679
1.595
1.29
1.088
0.9436
0.2541
1985
6.476
6.034
4.667
2.909
2.208
0.6121
1986
2.998
2.874
2.594
2.068
1.63
0.4345
1987
3.1
2.9
2.258
1.359
1.102
0.2919
1988
1.534
1.43
1.102
0.86
0.6528
0.1699
1989
2.761
2.603
2.14
1.357
1.13
0.2981
1990
2.057
1.887
1.62
1.291
1.076
0.2885
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
6.476
6.235
5.557
4.399
3.437
0.9141
0.0645161290322581
6.39
6.034
4.667
2.909
2.231
0.6121
0.0967741935483871
6.023
5.457
4.117
2.887
2.208
0.5834
0.129032258064516
5.171
4.955
3.985
2.788
2.151
0.5619
147
0.161290322580645
5.076
4.862
3.974
2.44
1.889
0.5215
0.193548387096774
4.316
4.161
3.601
2.39
1.832
0.4883
0.225806451612903
3.798
3.611
2.985
2.304
1.821
0.4776
0.258064516129032
3.228
3.103
2.682
2.229
1.764
0.4644
0.290322580645161
3.1
2.9
2.594
2.068
1.63
0.4345
0.32258064516129
2.998
2.874
2.337
1.908
1.534
0.4062
0.354838709677419
2.79
2.662
2.258
1.83
1.438
0.377
0.387096774193548
2.786
2.641
2.231
1.641
1.336
0.3523
0.419354838709677
2.761
2.628
2.14
1.441
1.193
0.3241
0.451612903225806
2.703
2.603
2.067
1.359
1.141
0.3107
0.483870967741936
2.675
2.539
2.043
1.357
1.13
0.3036
0.516129032258065
2.601
2.473
2.031
1.345
1.13
0.2981
0.548387096774194
2.5
2.369
1.984
1.333
1.102
0.2932
0.580645161290323
2.461
2.362
1.981
1.314
1.076
0.2919
0.612903225806452
2.07
1.966
1.62
1.291
1.074
0.2885
0.645161290322581
2.057
1.887
1.609
1.288
1.02
0.2715
0.67741935483871
1.957
1.87
1.589
1.258
1.01
0.2671
0.709677419354839
1.778
1.667
1.406
1.088
0.9436
0.2541
0.741935483870968
1.724
1.647
1.39
1.041
0.8482
0.2269
0.774193548387097
1.679
1.595
1.362
1.025
0.8285
0.2209
0.806451612903226
1.658
1.567
1.29
1.023
0.8097
0.2191
0.838709677419355
1.627
1.547
1.249
0.9726
0.8046
0.2181
0.870967741935484
1.589
1.505
1.202
0.9237
0.7895
0.2153
0.903225806451613
1.584
1.49
1.163
0.9113
0.7242
0.1904
0.935483870967742
1.534
1.43
1.102
0.86
0.6785
0.1812
0.967741935483871
1.516
1.417
1.082
0.8521
0.6528
0.1699
0.1
5.9378
5.4068
4.1038
2.8771
2.2023
0.58125
Average
of
yearly
averages:
0.35793
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicNDcornaerial
Metfile:
w14914.
dvf
PRZM
scenario:
NDcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
148
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)
149
Dicamba
Ohio
Corn
stored
as
dicOHcornground.
out
Chemical:
dicamba
PRZM
environment:
OHCornC.
txt
modified
Satday,
12
October
2002
at
17:
15:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w93815.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
06
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.7126
0.6803
0.5809
0.4961
0.4117
0.108
1962
0.6644
0.6097
0.4288
0.2649
0.2234
0.05954
1963
1.451
1.364
1.046
0.9399
0.7299
0.1915
1964
2.252
2.14
1.721
1.069
0.7726
0.1963
1965
1.653
1.574
1.352
0.8974
0.6575
0.1677
1966
0.9896
0.934
0.7638
0.6322
0.4713
0.1208
1967
4.879
4.584
3.588
1.886
1.32
0.3449
1968
2.651
2.463
2.1
1.169
0.8303
0.2189
1969
3.328
3.095
2.301
1.381
1.089
0.283
1970
2.091
1.942
1.462
0.9994
0.7593
0.1966
1971
0.5885
0.5524
0.4667
0.3076
0.2394
0.06279
1972
3.285
3.142
2.617
1.903
1.447
0.3721
1973
0.4616
0.4358
0.3514
0.2429
0.1938
0.05092
1974
6.984
6.528
4.959
2.717
1.898
0.4927
1975
1.309
1.267
1.015
0.6648
0.4902
0.1268
1976
0.6244
0.5885
0.4915
0.4114
0.3188
0.08305
1977
0.4051
0.3711
0.3128
0.2503
0.1938
0.05133
1978
1.019
0.9953
0.841
0.7067
0.5435
0.1402
1979
0.5361
0.5024
0.4012
0.2714
0.2269
0.06014
1980
3.178
2.966
2.21
1.142
0.812
0.2095
1981
1.678
1.585
1.261
0.8561
0.6601
0.1701
1982
0.6517
0.5995
0.5133
0.3106
0.2571
0.06833
1983
1.704
1.65
1.394
0.9066
0.6629
0.1698
1984
4.238
4.001
3.078
1.682
1.35
0.358
1985
0.9331
0.8686
0.6462
0.4674
0.3601
0.09514
1986
2.441
2.319
1.85
1.228
0.8889
0.2255
1987
4.85
4.709
3.899
2.387
1.701
0.4284
1988
0.9766
0.9098
0.6634
0.3711
0.2963
0.07815
1989
5.342
4.939
3.543
1.915
1.563
0.4105
1990
6.734
6.269
4.803
2.627
1.862
0.4819
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
6.984
6.528
4.959
2.717
1.898
0.4927
0.0645161290322581
6.734
6.269
4.803
2.627
1.862
0.4819
0.0967741935483871
5.342
4.939
3.899
2.387
1.701
0.4284
0.129032258064516
4.879
4.709
3.588
1.915
1.563
0.4105
0.161290322580645
4.85
4.584
3.543
1.903
1.447
0.3721
0.193548387096774
4.238
4.001
3.078
1.886
1.35
0.358
0.225806451612903
3.328
3.142
2.617
1.682
1.32
0.3449
0.258064516129032
3.285
3.095
2.301
1.381
1.089
0.283
0.290322580645161
3.178
2.966
2.21
1.228
0.8889
0.2255
0.32258064516129
2.651
2.463
2.1
1.169
0.8303
0.2189
0.354838709677419
2.441
2.319
1.85
1.142
0.812
0.2095
150
0.387096774193548
2.252
2.14
1.721
1.069
0.7726
0.1966
0.419354838709677
2.091
1.942
1.462
0.9994
0.7593
0.1963
0.451612903225806
1.704
1.65
1.394
0.9399
0.7299
0.1915
0.483870967741936
1.678
1.585
1.352
0.9066
0.6629
0.1701
0.516129032258065
1.653
1.574
1.261
0.8974
0.6601
0.1698
0.548387096774194
1.451
1.364
1.046
0.8561
0.6575
0.1677
0.580645161290323
1.309
1.267
1.015
0.7067
0.5435
0.1402
0.612903225806452
1.019
0.9953
0.841
0.6648
0.4902
0.1268
0.645161290322581
0.9896
0.934
0.7638
0.6322
0.4713
0.1208
0.67741935483871
0.9766
0.9098
0.6634
0.4961
0.4117
0.108
0.709677419354839
0.9331
0.8686
0.6462
0.4674
0.3601
0.09514
0.741935483870968
0.7126
0.6803
0.5809
0.4114
0.3188
0.08305
0.774193548387097
0.6644
0.6097
0.5133
0.3711
0.2963
0.07815
0.806451612903226
0.6517
0.5995
0.4915
0.3106
0.2571
0.06833
0.838709677419355
0.6244
0.5885
0.4667
0.3076
0.2394
0.06279
0.870967741935484
0.5885
0.5524
0.4288
0.2714
0.2269
0.06014
0.903225806451613
0.5361
0.5024
0.4012
0.2649
0.2234
0.05954
0.935483870967742
0.4616
0.4358
0.3514
0.2503
0.1938
0.05133
0.967741935483871
0.4051
0.3711
0.3128
0.2429
0.1938
0.05092
0.1
5.2957
4.916
3.8679
2.3398
1.6872
0.42661
Average
of
yearly
averages:
0.200753
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicOHcornground
Metfile:
w93815.
dvf
PRZM
scenario:
OHCornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
151
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicOHcornaerial.
out
Chemical:
dicamba
PRZM
environment:
OHCornC.
txt
modified
Satday,
12
October
2002
at
17:
15:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w93815.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
06
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.839
1.738
1.376
1.175
0.9413
0.2444
1962
1.457
1.337
1.125
0.8701
0.6832
0.1775
1963
2.23
2.097
1.823
1.554
1.222
0.319
1964
2.898
2.77
2.215
1.64
1.214
0.3097
1965
2.435
2.319
1.955
1.47
1.091
0.2792
1966
2.096
1.979
1.662
1.304
0.9916
0.2539
1967
5.894
5.538
4.324
2.29
1.764
0.4596
1968
3.738
3.472
2.838
1.61
1.287
0.3358
1969
4.264
3.966
2.961
1.951
1.54
0.3987
1970
3.118
2.895
2.186
1.546
1.191
0.3074
1971
1.794
1.684
1.307
0.9774
0.7433
0.1918
1972
3.983
3.81
3.169
2.491
1.911
0.4923
1973
1.555
1.468
1.265
0.9371
0.7193
0.1852
1974
7.825
7.314
5.556
3.074
2.305
0.6041
1975
2.044
1.897
1.51
1.281
0.9627
0.2482
1976
1.759
1.691
1.382
1.085
0.8379
0.2173
1977
1.509
1.382
0.9801
0.8141
0.6229
0.1613
1978
1.914
1.796
1.583
1.346
1.035
0.2662
1979
1.537
1.44
1.235
0.9293
0.7346
0.1907
1980
4.156
3.873
2.878
1.598
1.258
0.3226
1981
2.723
2.572
2.062
1.481
1.135
0.291
1982
1.537
1.409
1.23
0.9213
0.7331
0.1908
1983
2.597
2.453
2.022
1.532
1.173
0.3
1984
5.141
4.852
3.733
2.26
1.832
0.483
1985
2.068
1.921
1.428
1.068
0.8361
0.2187
1986
3.088
2.934
2.341
1.807
1.342
0.3412
1987
5.503
5.329
4.409
2.928
2.112
0.5335
1988
1.846
1.72
1.404
0.9971
0.7862
0.2022
1989
5.945
5.493
3.935
2.384
1.952
0.5108
1990
7.618
7.092
5.444
2.988
2.278
0.5899
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
7.825
7.314
5.556
3.074
2.305
0.6041
0.0645161290322581
7.618
7.092
5.444
2.988
2.278
0.5899
0.0967741935483871
5.945
5.538
4.409
2.928
2.112
0.5335
0.129032258064516
5.894
5.493
4.324
2.491
1.952
0.5108
0.161290322580645
5.503
5.329
3.935
2.384
1.911
0.4923
0.193548387096774
5.141
4.852
3.733
2.29
1.832
0.483
0.225806451612903
4.264
3.966
3.169
2.26
1.764
0.4596
152
0.258064516129032
4.156
3.873
2.961
1.951
1.54
0.3987
0.290322580645161
3.983
3.81
2.878
1.807
1.342
0.3412
0.32258064516129
3.738
3.472
2.838
1.64
1.287
0.3358
0.354838709677419
3.118
2.934
2.341
1.61
1.258
0.3226
0.387096774193548
3.088
2.895
2.215
1.598
1.222
0.319
0.419354838709677
2.898
2.77
2.186
1.554
1.214
0.3097
0.451612903225806
2.723
2.572
2.062
1.546
1.191
0.3074
0.483870967741936
2.597
2.453
2.022
1.532
1.173
0.3
0.516129032258065
2.435
2.319
1.955
1.481
1.135
0.291
0.548387096774194
2.23
2.097
1.823
1.47
1.091
0.2792
0.580645161290323
2.096
1.979
1.662
1.346
1.035
0.2662
0.612903225806452
2.068
1.921
1.583
1.304
0.9916
0.2539
0.645161290322581
2.044
1.897
1.51
1.281
0.9627
0.2482
0.67741935483871
1.914
1.796
1.428
1.175
0.9413
0.2444
0.709677419354839
1.846
1.738
1.404
1.085
0.8379
0.2187
0.741935483870968
1.839
1.72
1.382
1.068
0.8361
0.2173
0.774193548387097
1.794
1.691
1.376
0.9971
0.7862
0.2022
0.806451612903226
1.759
1.684
1.307
0.9774
0.7433
0.1918
0.838709677419355
1.555
1.468
1.265
0.9371
0.7346
0.1908
0.870967741935484
1.537
1.44
1.235
0.9293
0.7331
0.1907
0.903225806451613
1.537
1.409
1.23
0.9213
0.7193
0.1852
0.935483870967742
1.509
1.382
1.125
0.8701
0.6832
0.1775
0.967741935483871
1.457
1.337
0.9801
0.8141
0.6229
0.1613
0.1
5.9399
5.5335
4.4005
2.8843
2.096
0.53123
Average
of
yearly
averages:
0.320866666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicOHcornaerial
Metfile:
w93815.
dvf
PRZM
scenario:
OHCornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
153
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Pennsylvania
Corn
stored
as
dicPAcornground.
out
Chemical:
dicamba
PRZM
environment:
PAcornC.
txt
modified
Satday,
12
October
2002
at
17:
25:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14737.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
12
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.8419
0.8069
0.6754
0.5073
0.3791
0.09744
1962
0.3019
0.2825
0.2159
0.1677
0.1291
0.04188
1963
0.3114
0.294
0.2323
0.1787
0.1392
0.03973
1964
0.6614
0.6331
0.5405
0.4044
0.3037
0.09355
1965
0.3079
0.2868
0.216
0.1732
0.1338
0.05617
1966
0.4152
0.3937
0.3156
0.2518
0.1935
0.05806
1967
0.5021
0.4793
0.3946
0.3076
0.2387
0.08224
1968
5.313
5.053
4.104
3.082
2.318
0.6097
1969
0.7642
0.7286
0.6166
0.4503
0.3341
0.1318
1970
0.3765
0.3538
0.2749
0.2381
0.1835
0.05928
1971
0.3188
0.3022
0.2421
0.1859
0.1444
0.04937
1972
1.439
1.386
1.175
0.8063
0.748
0.2151
1973
0.3094
0.2937
0.2363
0.1775
0.1374
0.04133
1974
0.7774
0.7246
0.5547
0.4093
0.3316
0.1287
1975
0.3257
0.3037
0.2295
0.1893
0.1453
0.05143
1976
0.3035
0.2864
0.2256
0.1705
0.131
0.0399
1977
0.295
0.2746
0.2063
0.1613
0.1246
0.03896
1978
0.4367
0.4122
0.3262
0.2777
0.2112
0.05628
1979
0.341
0.3195
0.2455
0.1971
0.1531
0.04577
1980
0.6669
0.6353
0.5256
0.3739
0.2846
0.08292
1981
1.666
1.563
1.204
0.7861
0.5943
0.1594
1982
3.33
3.079
2.244
1.173
0.9177
0.2731
1983
3.472
3.292
2.67
1.772
1.29
0.3323
1984
3.299
3.1
2.167
1.168
0.9647
0.2608
1985
1.334
1.241
1.009
0.6206
0.4656
0.1463
1986
3.344
3.218
2.622
1.622
1.17
0.3111
1987
0.7382
0.6847
0.5906
0.3878
0.3061
0.1229
1988
9.544
8.893
6.658
3.635
2.529
0.663
1989
3.705
3.473
2.666
1.536
1.113
0.2964
1990
0.3077
0.2903
0.2288
0.1749
0.1357
0.03631
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
9.544
8.893
6.658
3.635
2.529
0.663
154
0.0645161290322581
5.313
5.053
4.104
3.082
2.318
0.6097
0.0967741935483871
3.705
3.473
2.67
1.772
1.29
0.3323
0.129032258064516
3.472
3.292
2.666
1.622
1.17
0.3111
0.161290322580645
3.344
3.218
2.622
1.536
1.113
0.2964
0.193548387096774
3.33
3.1
2.244
1.173
0.9647
0.2731
0.225806451612903
3.299
3.079
2.167
1.168
0.9177
0.2608
0.258064516129032
1.666
1.563
1.204
0.8063
0.748
0.2151
0.290322580645161
1.439
1.386
1.175
0.7861
0.5943
0.1594
0.32258064516129
1.334
1.241
1.009
0.6206
0.4656
0.1463
0.354838709677419
0.8419
0.8069
0.6754
0.5073
0.3791
0.1318
0.387096774193548
0.7774
0.7286
0.6166
0.4503
0.3341
0.1287
0.419354838709677
0.7642
0.7246
0.5906
0.4093
0.3316
0.1229
0.451612903225806
0.7382
0.6847
0.5547
0.4044
0.3061
0.09744
0.483870967741936
0.6669
0.6353
0.5405
0.3878
0.3037
0.09355
0.516129032258065
0.6614
0.6331
0.5256
0.3739
0.2846
0.08292
0.548387096774194
0.5021
0.4793
0.3946
0.3076
0.2387
0.08224
0.580645161290323
0.4367
0.4122
0.3262
0.2777
0.2112
0.05928
0.612903225806452
0.4152
0.3937
0.3156
0.2518
0.1935
0.05806
0.645161290322581
0.3765
0.3538
0.2749
0.2381
0.1835
0.05628
0.67741935483871
0.341
0.3195
0.2455
0.1971
0.1531
0.05617
0.709677419354839
0.3257
0.3037
0.2421
0.1893
0.1453
0.05143
0.741935483870968
0.3188
0.3022
0.2363
0.1859
0.1444
0.04937
0.774193548387097
0.3114
0.294
0.2323
0.1787
0.1392
0.04577
0.806451612903226
0.3094
0.2937
0.2295
0.1775
0.1374
0.04188
0.838709677419355
0.3079
0.2903
0.2288
0.1749
0.1357
0.04133
0.870967741935484
0.3077
0.2868
0.2256
0.1732
0.1338
0.0399
0.903225806451613
0.3035
0.2864
0.216
0.1705
0.131
0.03973
0.935483870967742
0.3019
0.2825
0.2159
0.1677
0.1291
0.03896
0.967741935483871
0.295
0.2746
0.2063
0.1613
0.1246
0.03631
0.1
3.6817
3.4549
2.6696
1.757
1.278
0.33018
Average
of
yearly
averages:
0.154040666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicPAcornground
Metfile:
w14737.
dvf
PRZM
scenario:
PAcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
155
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicPAcornaerial.
out
Chemical:
dicamba
PRZM
environment:
PAcornC.
txt
modified
Satday,
12
October
2002
at
17:
25:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14737.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
12
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.856
1.756
1.399
1.208
0.9269
0.2394
1962
1.508
1.411
1.079
0.837
0.6445
0.1758
1963
1.549
1.463
1.155
0.8852
0.6898
0.1828
1964
1.758
1.643
1.252
1.065
0.816
0.2259
1965
1.526
1.421
1.07
0.8505
0.6581
0.1917
1966
1.685
1.598
1.281
0.988
0.7624
0.2043
1967
1.777
1.696
1.395
1.057
0.8238
0.2347
1968
5.774
5.491
4.461
3.617
2.769
0.7323
1969
1.76
1.646
1.255
1.099
0.836
0.2607
1970
1.572
1.477
1.148
0.9054
0.7066
0.1949
1971
1.582
1.5
1.201
0.9169
0.713
0.1966
1972
2.214
2.132
1.808
1.48
1.27
0.3502
1973
1.544
1.466
1.179
0.8848
0.6851
0.1822
1974
1.517
1.43
1.127
0.8599
0.6797
0.2668
1975
1.536
1.432
1.082
0.8602
0.6631
0.1851
1976
1.517
1.432
1.128
0.8522
0.6545
0.1751
1977
1.471
1.369
1.029
0.8018
0.6197
0.1666
1978
1.625
1.557
1.213
0.9606
0.7366
0.1922
1979
1.557
1.459
1.121
0.8789
0.6848
0.1839
1980
1.772
1.654
1.254
1.023
0.7877
0.2115
1981
2.822
2.647
2.04
1.406
1.091
0.2872
1982
3.585
3.315
2.417
1.561
1.371
0.4046
1983
4.159
3.942
3.209
2.384
1.768
0.4553
1984
3.96
3.721
2.601
1.693
1.449
0.3848
1985
2.224
2.07
1.654
1.229
0.9584
0.2735
1986
4.015
3.874
3.15
2.196
1.617
0.4267
1987
1.527
1.431
1.1
0.8581
0.6557
0.2504
1988
10.22
9.527
7.132
3.94
2.886
0.7704
1989
4.753
4.455
3.42
2.025
1.599
0.4236
1990
1.534
1.448
1.141
0.8703
0.6753
0.1762
156
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
10.22
9.527
7.132
3.94
2.886
0.7704
0.0645161290322581
5.774
5.491
4.461
3.617
2.769
0.7323
0.0967741935483871
4.753
4.455
3.42
2.384
1.768
0.4553
0.129032258064516
4.159
3.942
3.209
2.196
1.617
0.4267
0.161290322580645
4.015
3.874
3.15
2.025
1.599
0.4236
0.193548387096774
3.96
3.721
2.601
1.693
1.449
0.4046
0.225806451612903
3.585
3.315
2.417
1.561
1.371
0.3848
0.258064516129032
2.822
2.647
2.04
1.48
1.27
0.3502
0.290322580645161
2.224
2.132
1.808
1.406
1.091
0.2872
0.32258064516129
2.214
2.07
1.654
1.229
0.9584
0.2735
0.354838709677419
1.856
1.756
1.399
1.208
0.9269
0.2668
0.387096774193548
1.777
1.696
1.395
1.099
0.836
0.2607
0.419354838709677
1.772
1.654
1.281
1.065
0.8238
0.2504
0.451612903225806
1.76
1.646
1.255
1.057
0.816
0.2394
0.483870967741936
1.758
1.643
1.254
1.023
0.7877
0.2347
0.516129032258065
1.685
1.598
1.252
0.988
0.7624
0.2259
0.548387096774194
1.625
1.557
1.213
0.9606
0.7366
0.2115
0.580645161290323
1.582
1.5
1.201
0.9169
0.713
0.2043
0.612903225806452
1.572
1.477
1.179
0.9054
0.7066
0.1966
0.645161290322581
1.557
1.466
1.155
0.8852
0.6898
0.1949
0.67741935483871
1.549
1.463
1.148
0.8848
0.6851
0.1922
0.709677419354839
1.544
1.459
1.141
0.8789
0.6848
0.1917
0.741935483870968
1.536
1.448
1.128
0.8703
0.6797
0.1851
0.774193548387097
1.534
1.432
1.127
0.8602
0.6753
0.1839
0.806451612903226
1.527
1.432
1.121
0.8599
0.6631
0.1828
0.838709677419355
1.526
1.431
1.1
0.8581
0.6581
0.1822
0.870967741935484
1.517
1.43
1.082
0.8522
0.6557
0.1762
0.903225806451613
1.517
1.421
1.079
0.8505
0.6545
0.1758
0.935483870967742
1.508
1.411
1.07
0.837
0.6445
0.1751
0.967741935483871
1.471
1.369
1.029
0.8018
0.6197
0.1666
0.1
4.6936
4.4037
3.3989
2.3652
1.7529
0.45244
Average
of
yearly
averages:
0.286846666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicPAcornaerial
Metfile:
w14737.
dvf
PRZM
scenario:
PAcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
157
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Texas
Corn
stored
as
dicTXcornground.
out
Chemical:
dicamba
PRZM
environment:
TXcornC.
txt
modified
Satday,
12
October
2002
at
17:
28:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.517
1.297
0.9204
0.4745
0.3632
0.09393
1962
3.313
3.116
2.083
1.254
0.9401
0.2376
1963
0.7602
0.6809
0.4462
0.2813
0.2215
0.05734
1964
1.641
1.444
0.8106
0.6564
0.5374
0.1385
1965
21.34
19.16
11.86
5.713
4.041
1.011
1966
2.219
2.078
1.649
1.014
0.734
0.1906
1967
6.761
6.071
4.018
2.327
1.667
0.4199
1968
9.03
7.973
5.15
2.534
1.769
0.4455
1969
2.136
1.926
1.332
0.8501
0.6309
0.1617
1970
41.53
36.75
23.16
10.8
7.339
1.843
1971
2.448
2.256
1.622
1.023
0.8552
0.2265
1972
2.302
2.01
1.212
0.7672
0.6497
0.1725
1973
3.519
3.275
2.448
1.467
1.274
0.3255
1974
0.7369
0.6484
0.5478
0.3791
0.281
0.08701
1975
10.69
9.529
5.924
4.674
3.245
0.8129
1976
7.445
6.712
4.467
2.728
1.941
0.4855
1977
21.55
20.24
14.08
7.328
5.043
1.259
1978
5.632
4.969
3.061
2.362
1.644
0.4134
1979
26.02
23.02
14.46
6.676
4.66
1.17
1980
4.194
3.87
2.707
1.531
1.059
0.2707
1981
4.666
4.084
3.043
1.324
0.9253
0.2306
1982
3.419
3.134
2.123
1.362
0.9946
0.2493
1983
5.454
4.981
3.803
2.088
1.441
0.3634
1984
1.179
1.051
0.7059
0.3694
0.2831
0.07221
1985
1.558
1.349
0.8189
0.428
0.3336
0.08698
158
1986
9.725
8.966
5.833
3.286
2.273
0.5686
1987
2.864
2.526
1.467
0.8029
0.5824
0.1475
1988
4.596
4.135
2.841
1.513
1.083
0.2726
1989
9.541
8.347
5.462
3.234
2.312
0.578
1990
4.534
4.138
2.829
1.648
1.149
0.2908
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
41.53
36.75
23.16
10.8
7.339
1.843
0.0645161290322581
26.02
23.02
14.46
7.328
5.043
1.259
0.0967741935483871
21.55
20.24
14.08
6.676
4.66
1.17
0.129032258064516
21.34
19.16
11.86
5.713
4.041
1.011
0.161290322580645
10.69
9.529
5.924
4.674
3.245
0.8129
0.193548387096774
9.725
8.966
5.833
3.286
2.312
0.578
0.225806451612903
9.541
8.347
5.462
3.234
2.273
0.5686
0.258064516129032
9.03
7.973
5.15
2.728
1.941
0.4855
0.290322580645161
7.445
6.712
4.467
2.534
1.769
0.4455
0.32258064516129
6.761
6.071
4.018
2.362
1.667
0.4199
0.354838709677419
5.632
4.981
3.803
2.327
1.644
0.4134
0.387096774193548
5.454
4.969
3.061
2.088
1.441
0.3634
0.419354838709677
4.666
4.138
3.043
1.648
1.274
0.3255
0.451612903225806
4.596
4.135
2.841
1.531
1.149
0.2908
0.483870967741936
4.534
4.084
2.829
1.513
1.083
0.2726
0.516129032258065
4.194
3.87
2.707
1.467
1.059
0.2707
0.548387096774194
3.519
3.275
2.448
1.362
0.9946
0.2493
0.580645161290323
3.419
3.134
2.123
1.324
0.9401
0.2376
0.612903225806452
3.313
3.116
2.083
1.254
0.9253
0.2306
0.645161290322581
2.864
2.526
1.649
1.023
0.8552
0.2265
0.67741935483871
2.448
2.256
1.622
1.014
0.734
0.1906
0.709677419354839
2.302
2.078
1.467
0.8501
0.6497
0.1725
0.741935483870968
2.219
2.01
1.332
0.8029
0.6309
0.1617
0.774193548387097
2.136
1.926
1.212
0.7672
0.5824
0.1475
0.806451612903226
1.641
1.444
0.9204
0.6564
0.5374
0.1385
0.838709677419355
1.558
1.349
0.8189
0.4745
0.3632
0.09393
0.870967741935484
1.517
1.297
0.8106
0.428
0.3336
0.08701
0.903225806451613
1.179
1.051
0.7059
0.3791
0.2831
0.08698
0.935483870967742
0.7602
0.6809
0.5478
0.3694
0.281
0.07221
0.967741935483871
0.7369
0.6484
0.4462
0.2813
0.2215
0.05734
0.1
21.529
20.132
13.858
6.5797
4.5981
1.1541
Average
of
yearly
averages:
0.422735666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXcornground
Metfile:
w13958.
dvf
PRZM
scenario:
TXcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
159
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicTXcornaerial.
out
Chemical:
dicamba
PRZM
environment:
TXcornC.
txt
modified
Satday,
12
October
2002
at
17:
28:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.614
1.378
0.9869
0.7865
0.6897
0.1748
1962
3.531
3.336
2.25
1.592
1.243
0.3128
1963
1.489
1.334
1.008
0.6722
0.53
0.1341
1964
1.686
1.528
1.13
0.9949
0.8462
0.2148
1965
21.42
19.2
11.88
5.814
4.173
1.048
1966
2.664
2.505
2.076
1.459
1.062
0.2722
1967
7.253
6.513
4.3
2.603
1.917
0.4821
1968
9.57
8.45
5.442
2.744
2.03
0.5104
1969
3.028
2.73
1.9
1.247
0.9451
0.2399
1970
40.88
36.18
22.8
10.64
7.356
1.852
1971
3.164
2.915
2.095
1.467
1.168
0.3038
1972
2.333
2.037
1.284
1.046
0.9272
0.244
1973
4.166
3.877
2.939
1.926
1.6
0.4067
1974
1.698
1.494
1.049
0.8164
0.5929
0.1642
1975
10.87
9.687
6.096
4.814
3.427
0.8591
1976
7.862
7.086
4.714
3.052
2.198
0.5497
1977
21.52
20.19
14.04
7.506
5.18
1.293
1978
5.908
5.213
3.364
2.57
1.896
0.4759
1979
25.68
22.72
14.27
6.673
4.799
1.207
1980
4.588
4.233
2.99
1.936
1.354
0.3436
1981
5.413
4.738
3.412
1.66
1.18
0.2936
160
1982
3.897
3.57
2.458
1.721
1.275
0.319
1983
6.04
5.503
4.246
2.331
1.747
0.4398
1984
1.943
1.731
1.212
0.8023
0.601
0.1511
1985
1.775
1.537
0.939
0.7712
0.6587
0.1679
1986
10.35
9.504
6.166
3.476
2.503
0.6258
1987
3.173
2.798
1.798
1.147
0.8809
0.2216
1988
5.213
4.69
3.199
1.823
1.391
0.3492
1989
10.04
8.781
5.777
3.5
2.53
0.6322
1990
4.86
4.436
3.094
1.98
1.416
0.3571
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
40.88
36.18
22.8
10.64
7.356
1.852
0.0645161290322581
25.68
22.72
14.27
7.506
5.18
1.293
0.0967741935483871
21.52
20.19
14.04
6.673
4.799
1.207
0.129032258064516
21.42
19.2
11.88
5.814
4.173
1.048
0.161290322580645
10.87
9.687
6.166
4.814
3.427
0.8591
0.193548387096774
10.35
9.504
6.096
3.5
2.53
0.6322
0.225806451612903
10.04
8.781
5.777
3.476
2.503
0.6258
0.258064516129032
9.57
8.45
5.442
3.052
2.198
0.5497
0.290322580645161
7.862
7.086
4.714
2.744
2.03
0.5104
0.32258064516129
7.253
6.513
4.3
2.603
1.917
0.4821
0.354838709677419
6.04
5.503
4.246
2.57
1.896
0.4759
0.387096774193548
5.908
5.213
3.412
2.331
1.747
0.4398
0.419354838709677
5.413
4.738
3.364
1.98
1.6
0.4067
0.451612903225806
5.213
4.69
3.199
1.936
1.416
0.3571
0.483870967741936
4.86
4.436
3.094
1.926
1.391
0.3492
0.516129032258065
4.588
4.233
2.99
1.823
1.354
0.3436
0.548387096774194
4.166
3.877
2.939
1.721
1.275
0.319
0.580645161290323
3.897
3.57
2.458
1.66
1.243
0.3128
0.612903225806452
3.531
3.336
2.25
1.592
1.18
0.3038
0.645161290322581
3.173
2.915
2.095
1.467
1.168
0.2936
0.67741935483871
3.164
2.798
2.076
1.459
1.062
0.2722
0.709677419354839
3.028
2.73
1.9
1.247
0.9451
0.244
0.741935483870968
2.664
2.505
1.798
1.147
0.9272
0.2399
0.774193548387097
2.333
2.037
1.284
1.046
0.8809
0.2216
0.806451612903226
1.943
1.731
1.212
0.9949
0.8462
0.2148
0.838709677419355
1.775
1.537
1.13
0.8164
0.6897
0.1748
0.870967741935484
1.698
1.528
1.049
0.8023
0.6587
0.1679
0.903225806451613
1.686
1.494
1.008
0.7865
0.601
0.1642
0.935483870967742
1.614
1.378
0.9869
0.7712
0.5929
0.1511
0.967741935483871
1.489
1.334
0.939
0.6722
0.53
0.1341
0.1
21.51
20.091
13.824
6.5871
4.7364
1.1911
Average
of
yearly
averages:
0.48818
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXcornaerial
Metfile:
w13958.
dvf
PRZM
scenario:
TXcornC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
161
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.42
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Kansas
Sorghum
stored
as
dicKAsorghumground.
out
Chemical:
dicamba
PRZM
environment:
KSsorghumC.
txt
modified
Satday,
12
October
2002
at
15:
57:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13996.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
44
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.584
2.434
1.89
1.196
0.8527
0.2147
1962
0.5893
0.5338
0.3741
0.2029
0.1581
0.04121
1963
2.408
2.228
1.643
0.9571
0.6758
0.1693
1964
0.6673
0.5971
0.4362
0.2285
0.1769
0.04522
1965
0.6394
0.5824
0.3936
0.2105
0.1628
0.04175
1966
0.3471
0.3226
0.2486
0.1494
0.1135
0.02892
1967
6.455
5.769
3.446
1.917
1.373
0.3489
1968
1.371
1.255
0.9831
0.5281
0.3943
0.101
1969
2.766
2.495
1.7
1.357
1.013
0.2598
1970
2.719
2.528
1.792
0.8853
0.6355
0.1629
1971
1.411
1.323
1
0.6141
0.4402
0.1119
1972
2.126
1.978
1.488
0.9363
0.6859
0.1749
1973
4.52
4.063
2.646
1.529
1.114
0.2812
1974
1.292
1.173
0.8459
0.5293
0.3932
0.1011
1975
1.448
1.317
0.9899
0.521
0.3791
0.09792
1976
0.3197
0.2992
0.249
0.2083
0.1699
0.04459
162
1977
3.223
2.894
1.917
1.283
0.9308
0.2343
1978
9.043
8.274
5.356
2.57
1.794
0.4566
1979
1.346
1.256
0.9548
0.6977
0.5114
0.1307
1980
4.345
3.938
2.543
1.191
0.8235
0.207
1981
0.9159
0.8081
0.6045
0.4468
0.3247
0.08245
1982
2.453
2.264
1.71
1.035
0.7317
0.1838
1983
1.409
1.315
1.018
0.6303
0.445
0.1115
1984
0.3173
0.2873
0.2281
0.1495
0.115
0.02951
1985
3.668
3.441
2.353
1.505
1.147
0.2909
1986
0.7847
0.7425
0.5373
0.3633
0.2789
0.07195
1987
0.7242
0.6456
0.4254
0.3655
0.2785
0.07115
1988
1.689
1.54
1.003
0.48
0.3519
0.09698
1989
0.6654
0.616
0.4579
0.3062
0.2282
0.05841
1990
0.3232
0.3061
0.2525
0.2105
0.1569
0.03982
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
9.043
8.274
5.356
2.57
1.794
0.4566
0.0645161290322581
6.455
5.769
3.446
1.917
1.373
0.3489
0.0967741935483871
4.52
4.063
2.646
1.529
1.147
0.2909
0.129032258064516
4.345
3.938
2.543
1.505
1.114
0.2812
0.161290322580645
3.668
3.441
2.353
1.357
1.013
0.2598
0.193548387096774
3.223
2.894
1.917
1.283
0.9308
0.2343
0.225806451612903
2.766
2.528
1.89
1.196
0.8527
0.2147
0.258064516129032
2.719
2.495
1.792
1.191
0.8235
0.207
0.290322580645161
2.584
2.434
1.71
1.035
0.7317
0.1838
0.32258064516129
2.453
2.264
1.7
0.9571
0.6859
0.1749
0.354838709677419
2.408
2.228
1.643
0.9363
0.6758
0.1693
0.387096774193548
2.126
1.978
1.488
0.8853
0.6355
0.1629
0.419354838709677
1.689
1.54
1.018
0.6977
0.5114
0.1307
0.451612903225806
1.448
1.323
1.003
0.6303
0.445
0.1119
0.483870967741936
1.411
1.317
1
0.6141
0.4402
0.1115
0.516129032258065
1.409
1.315
0.9899
0.5293
0.3943
0.1011
0.548387096774194
1.371
1.256
0.9831
0.5281
0.3932
0.101
0.580645161290323
1.346
1.255
0.9548
0.521
0.3791
0.09792
0.612903225806452
1.292
1.173
0.8459
0.48
0.3519
0.09698
0.645161290322581
0.9159
0.8081
0.6045
0.4468
0.3247
0.08245
0.67741935483871
0.7847
0.7425
0.5373
0.3655
0.2789
0.07195
0.709677419354839
0.7242
0.6456
0.4579
0.3633
0.2785
0.07115
0.741935483870968
0.6673
0.616
0.4362
0.3062
0.2282
0.05841
0.774193548387097
0.6654
0.5971
0.4254
0.2285
0.1769
0.04522
0.806451612903226
0.6394
0.5824
0.3936
0.2105
0.1699
0.04459
0.838709677419355
0.5893
0.5338
0.3741
0.2105
0.1628
0.04175
0.870967741935484
0.3471
0.3226
0.2525
0.2083
0.1581
0.04121
0.903225806451613
0.3232
0.3061
0.249
0.2029
0.1569
0.03982
0.935483870967742
0.3197
0.2992
0.2486
0.1495
0.115
0.02951
0.967741935483871
0.3173
0.2873
0.2281
0.1494
0.1135
0.02892
0.1
4.5025
4.0505
2.6357
1.5266
1.1437
0.28993
Average
of
yearly
averages:
0.143012666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
163
Output
File:
dicKAsorghumground
Metfile:
w13996.
dvf
PRZM
scenario:
KSsorghumC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.28
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicKAsorghumaerial.
out
Chemical:
dicamba
PRZM
environment:
KSsorghumC.
txt
modified
Satday,
12
October
2002
at
15:
57:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13996.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
44
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
2.972
2.812
2.177
1.515
1.098
0.2767
1962
1.136
1.029
0.7555
0.4936
0.3789
0.09716
1963
2.813
2.603
1.919
1.255
0.8944
0.2243
1964
1.129
1.031
0.8207
0.5459
0.4101
0.1036
1965
1.184
1.067
0.7904
0.5266
0.3918
0.09964
1966
0.9323
0.8459
0.6771
0.4936
0.3603
0.091
1967
6.948
6.21
3.701
2.138
1.55
0.3935
1968
2.105
1.927
1.418
0.8675
0.6524
0.1656
1969
3.077
2.776
1.888
1.621
1.233
0.3155
1970
3.255
3.073
2.15
1.115
0.8541
0.218
1971
1.763
1.651
1.247
0.936
0.6797
0.1726
1972
2.512
2.337
1.757
1.246
0.9269
0.2361
1973
4.988
4.48
2.918
1.791
1.326
0.3343
164
1974
1.737
1.577
1.2
0.8325
0.6379
0.1628
1975
1.866
1.692
1.345
0.7893
0.6151
0.1576
1976
1.059
0.9728
0.6611
0.5766
0.4425
0.1134
1977
3.547
3.185
2.109
1.484
1.09
0.2742
1978
9.404
8.597
5.564
2.669
1.958
0.4994
1979
1.838
1.716
1.304
1.033
0.7569
0.1926
1980
4.909
4.449
2.874
1.399
1.035
0.2597
1981
1.51
1.333
1
0.7598
0.5525
0.1396
1982
2.813
2.613
1.96
1.343
0.9701
0.2442
1983
1.918
1.79
1.377
0.9709
0.6928
0.1738
1984
1.018
0.9152
0.629
0.4771
0.3486
0.08816
1985
4.142
3.873
2.645
1.795
1.358
0.3441
1986
1.215
1.148
0.8479
0.6712
0.5046
0.1287
1987
1.065
0.9906
0.801
0.6618
0.4962
0.1261
1988
1.747
1.59
1.035
0.6395
0.5591
0.1526
1989
1.14
1.044
0.7544
0.6541
0.4858
0.1235
1990
1.068
0.9687
0.6656
0.5558
0.4052
0.1023
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
9.404
8.597
5.564
2.669
1.958
0.4994
0.0645161290322581
6.948
6.21
3.701
2.138
1.55
0.3935
0.0967741935483871
4.988
4.48
2.918
1.795
1.358
0.3441
0.129032258064516
4.909
4.449
2.874
1.791
1.326
0.3343
0.161290322580645
4.142
3.873
2.645
1.621
1.233
0.3155
0.193548387096774
3.547
3.185
2.177
1.515
1.098
0.2767
0.225806451612903
3.255
3.073
2.15
1.484
1.09
0.2742
0.258064516129032
3.077
2.812
2.109
1.399
1.035
0.2597
0.290322580645161
2.972
2.776
1.96
1.343
0.9701
0.2442
0.32258064516129
2.813
2.613
1.919
1.255
0.9269
0.2361
0.354838709677419
2.813
2.603
1.888
1.246
0.8944
0.2243
0.387096774193548
2.512
2.337
1.757
1.115
0.8541
0.218
0.419354838709677
2.105
1.927
1.418
1.033
0.7569
0.1926
0.451612903225806
1.918
1.79
1.377
0.9709
0.6928
0.1738
0.483870967741936
1.866
1.716
1.345
0.936
0.6797
0.1726
0.516129032258065
1.838
1.692
1.304
0.8675
0.6524
0.1656
0.548387096774194
1.763
1.651
1.247
0.8325
0.6379
0.1628
0.580645161290323
1.747
1.59
1.2
0.7893
0.6151
0.1576
0.612903225806452
1.737
1.577
1.035
0.7598
0.5591
0.1526
0.645161290322581
1.51
1.333
1
0.6712
0.5525
0.1396
0.67741935483871
1.215
1.148
0.8479
0.6618
0.5046
0.1287
0.709677419354839
1.184
1.067
0.8207
0.6541
0.4962
0.1261
0.741935483870968
1.14
1.044
0.801
0.6395
0.4858
0.1235
0.774193548387097
1.136
1.031
0.7904
0.5766
0.4425
0.1134
0.806451612903226
1.129
1.029
0.7555
0.5558
0.4101
0.1036
0.838709677419355
1.068
0.9906
0.7544
0.5459
0.4052
0.1023
0.870967741935484
1.065
0.9728
0.6771
0.5266
0.3918
0.09964
0.903225806451613
1.059
0.9687
0.6656
0.4936
0.3789
0.09716
0.935483870967742
1.018
0.9152
0.6611
0.4936
0.3603
0.091
0.967741935483871
0.9323
0.8459
0.629
0.4771
0.3486
0.08816
0.1
4.9801
4.4769
2.9136
1.7946
1.3548
0.34312
Average
of
yearly
averages:
0.200358666666667
165
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicKAsorghumaerial
Metfile:
w13996.
dvf
PRZM
scenario:
KSsorghumC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.28
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Texas
Sorghum
stored
as
dicTXsorghumground.
out
Chemical:
dicamba
PRZM
environment:
TXsorghumC.
txt
modified
Satday,
12
October
2002
at
17:
29:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.9136
0.8137
0.5129
0.4192
0.301
0.07516
1962
3.019
2.822
1.74
0.7852
0.5464
0.1365
1963
0.198
0.1725
0.1159
0.09675
0.07546
0.01918
1964
1.486
1.317
0.7418
0.4765
0.3757
0.09428
1965
1.881
1.65
1.008
0.5062
0.3497
0.09286
1966
2.635
2.443
1.762
0.9606
0.6693
0.1692
166
1967
0.4373
0.3933
0.2657
0.1675
0.14
0.03877
1968
3.676
3.357
2.181
1.058
0.7283
0.1805
1969
0.9805
0.8597
0.5247
0.3413
0.2577
0.06596
1970
1.429
1.269
0.8364
0.4268
0.2989
0.07604
1971
1.014
0.8825
0.5191
0.2472
0.1879
0.04947
1972
19.46
17.16
10.64
4.999
3.422
0.8473
1973
0.3064
0.2771
0.1966
0.1712
0.1282
0.03294
1974
5.277
4.619
2.898
1.357
0.9224
0.2335
1975
1.672
1.454
0.8711
0.4743
0.3581
0.09086
1976
2.637
2.385
1.694
0.9107
0.6553
0.164
1977
0.1963
0.1741
0.1088
0.08524
0.06167
0.0189
1978
8.632
7.608
4.755
2.33
1.587
0.3936
1979
8.808
7.805
4.941
2.395
1.65
0.411
1980
0.8554
0.7818
0.5742
0.3182
0.2169
0.05614
1981
2.359
2.071
1.269
0.7952
0.5471
0.1358
1982
2.12
1.875
1.254
0.7505
0.5308
0.1322
1983
2.711
2.428
1.59
1.083
0.7589
0.1896
1984
0.365
0.3271
0.2068
0.1204
0.08884
0.02262
1985
1.589
1.378
0.8439
0.3926
0.2857
0.07193
1986
18.84
16.64
10.67
5.065
3.439
0.8516
1987
1.254
1.15
0.7361
0.5637
0.3972
0.09945
1988
1.601
1.413
0.8676
0.4545
0.3296
0.08239
1989
4.558
3.987
2.508
1.362
0.9519
0.2371
1990
8.624
7.62
4.77
2.593
1.786
0.4443
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
19.46
17.16
10.67
5.065
3.439
0.8516
0.0645161290322581
18.84
16.64
10.64
4.999
3.422
0.8473
0.0967741935483871
8.808
7.805
4.941
2.593
1.786
0.4443
0.129032258064516
8.632
7.62
4.77
2.395
1.65
0.411
0.161290322580645
8.624
7.608
4.755
2.33
1.587
0.3936
0.193548387096774
5.277
4.619
2.898
1.362
0.9519
0.2371
0.225806451612903
4.558
3.987
2.508
1.357
0.9224
0.2335
0.258064516129032
3.676
3.357
2.181
1.083
0.7589
0.1896
0.290322580645161
3.019
2.822
1.762
1.058
0.7283
0.1805
0.32258064516129
2.711
2.443
1.74
0.9606
0.6693
0.1692
0.354838709677419
2.637
2.428
1.694
0.9107
0.6553
0.164
0.387096774193548
2.635
2.385
1.59
0.7952
0.5471
0.1365
0.419354838709677
2.359
2.071
1.269
0.7852
0.5464
0.1358
0.451612903225806
2.12
1.875
1.254
0.7505
0.5308
0.1322
0.483870967741936
1.881
1.65
1.008
0.5637
0.3972
0.09945
0.516129032258065
1.672
1.454
0.8711
0.5062
0.3757
0.09428
0.548387096774194
1.601
1.413
0.8676
0.4765
0.3581
0.09286
0.580645161290323
1.589
1.378
0.8439
0.4743
0.3497
0.09086
0.612903225806452
1.486
1.317
0.8364
0.4545
0.3296
0.08239
0.645161290322581
1.429
1.269
0.7418
0.4268
0.301
0.07604
0.67741935483871
1.254
1.15
0.7361
0.4192
0.2989
0.07516
0.709677419354839
1.014
0.8825
0.5742
0.3926
0.2857
0.07193
0.741935483870968
0.9805
0.8597
0.5247
0.3413
0.2577
0.06596
0.774193548387097
0.9136
0.8137
0.5191
0.3182
0.2169
0.05614
0.806451612903226
0.8554
0.7818
0.5129
0.2472
0.1879
0.04947
0.838709677419355
0.4373
0.3933
0.2657
0.1712
0.14
0.03877
0.870967741935484
0.365
0.3271
0.2068
0.1675
0.1282
0.03294
167
0.903225806451613
0.3064
0.2771
0.1966
0.1204
0.08884
0.02262
0.935483870967742
0.198
0.1741
0.1159
0.09675
0.07546
0.01918
0.967741935483871
0.1963
0.1725
0.1088
0.08524
0.06167
0.0189
0.1
8.7904
7.7865
4.9239
2.5732
1.7724
0.44097
Average
of
yearly
averages:
0.183771666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXsorghumground
Metfile:
w13958.
dvf
PRZM
scenario:
TXsorghumC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.28
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicTXsorghumaerial.
out
Chemical:
dicamba
PRZM
environment:
TXsorghumC.
txt
modified
Satday,
12
October
2002
at
17:
29:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13958.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
24
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.202
1.082
0.8142
0.6632
0.4721
0.1176
1962
3.487
3.258
2.004
0.9827
0.718
0.1791
1963
0.8471
0.7473
0.4657
0.3708
0.2684
0.06714
168
1964
1.602
1.427
0.8188
0.7199
0.5426
0.1356
1965
2.113
1.853
1.138
0.749
0.5238
0.1361
1966
3.094
2.856
2.036
1.222
0.8569
0.2159
1967
0.9853
0.886
0.5929
0.4407
0.3314
0.08628
1968
4.025
3.66
2.367
1.287
0.8948
0.222
1969
1.503
1.318
0.8677
0.6091
0.4512
0.1141
1970
1.613
1.433
1.055
0.6876
0.4859
0.1227
1971
1.126
0.9799
0.5766
0.4502
0.3769
0.09642
1972
19.24
16.97
10.52
5.058
3.469
0.8592
1973
0.8929
0.7976
0.573
0.4653
0.3382
0.08532
1974
5.63
4.928
3.082
1.563
1.072
0.2708
1975
1.95
1.696
1.034
0.6985
0.53
0.1337
1976
2.946
2.665
1.909
1.156
0.8399
0.21
1977
0.8694
0.7713
0.4697
0.3708
0.2638
0.06911
1978
8.811
7.766
4.852
2.492
1.705
0.423
1979
9.018
7.991
5.058
2.574
1.779
0.443
1980
1.196
1.105
0.8769
0.5716
0.394
0.09993
1981
2.83
2.484
1.521
0.9904
0.6809
0.169
1982
2.448
2.166
1.433
0.9772
0.6982
0.1739
1983
2.942
2.635
1.726
1.302
0.936
0.2338
1984
0.8251
0.7264
0.5482
0.3879
0.2775
0.06945
1985
1.967
1.706
1.084
0.6284
0.4692
0.1176
1986
18.65
16.47
10.55
5.127
3.489
0.8642
1987
1.672
1.545
0.9976
0.7951
0.5596
0.1399
1988
2.14
1.886
1.189
0.7149
0.5227
0.1304
1989
4.804
4.202
2.634
1.547
1.094
0.2725
1990
8.772
7.75
4.852
2.731
1.889
0.4698
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
19.24
16.97
10.55
5.127
3.489
0.8642
0.0645161290322581
18.65
16.47
10.52
5.058
3.469
0.8592
0.0967741935483871
9.018
7.991
5.058
2.731
1.889
0.4698
0.129032258064516
8.811
7.766
4.852
2.574
1.779
0.443
0.161290322580645
8.772
7.75
4.852
2.492
1.705
0.423
0.193548387096774
5.63
4.928
3.082
1.563
1.094
0.2725
0.225806451612903
4.804
4.202
2.634
1.547
1.072
0.2708
0.258064516129032
4.025
3.66
2.367
1.302
0.936
0.2338
0.290322580645161
3.487
3.258
2.036
1.287
0.8948
0.222
0.32258064516129
3.094
2.856
2.004
1.222
0.8569
0.2159
0.354838709677419
2.946
2.665
1.909
1.156
0.8399
0.21
0.387096774193548
2.942
2.635
1.726
0.9904
0.718
0.1791
0.419354838709677
2.83
2.484
1.521
0.9827
0.6982
0.1739
0.451612903225806
2.448
2.166
1.433
0.9772
0.6809
0.169
0.483870967741936
2.14
1.886
1.189
0.7951
0.5596
0.1399
0.516129032258065
2.113
1.853
1.138
0.749
0.5426
0.1361
0.548387096774194
1.967
1.706
1.084
0.7199
0.53
0.1356
0.580645161290323
1.95
1.696
1.055
0.7149
0.5238
0.1337
0.612903225806452
1.672
1.545
1.034
0.6985
0.5227
0.1304
0.645161290322581
1.613
1.433
0.9976
0.6876
0.4859
0.1227
0.67741935483871
1.602
1.427
0.8769
0.6632
0.4721
0.1176
0.709677419354839
1.503
1.318
0.8677
0.6284
0.4692
0.1176
0.741935483870968
1.202
1.105
0.8188
0.6091
0.4512
0.1141
0.774193548387097
1.196
1.082
0.8142
0.5716
0.394
0.09993
169
0.806451612903226
1.126
0.9799
0.5929
0.4653
0.3769
0.09642
0.838709677419355
0.9853
0.886
0.5766
0.4502
0.3382
0.08628
0.870967741935484
0.8929
0.7976
0.573
0.4407
0.3314
0.08532
0.903225806451613
0.8694
0.7713
0.5482
0.3879
0.2775
0.06945
0.935483870967742
0.8471
0.7473
0.4697
0.3708
0.2684
0.06911
0.967741935483871
0.8251
0.7264
0.4657
0.3708
0.2638
0.06714
0.1
8.9973
7.9685
5.0374
2.7153
1.878
0.46712
Average
of
yearly
averages:
0.224251666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicTXsorghumaerial
Metfile:
w13958.
dvf
PRZM
scenario:
TXsorghumC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.28
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Interval
1
interval
30
days
Set
to
0
or
delete
line
for
single
app.
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)
170
Dicamba
Michigan
Asparagus
stored
as
dicMIAaspground.
out
Chemical:
dicamba
PRZM
environment:
MIAsparagusC.
txt
modified
Thuday,
9
June
2005
at
07:
37:
14
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14848.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
42
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.25
0.2422
0.2117
0.1439
0.1062
0.02723
1962
0.2502
0.2409
0.2045
0.1243
0.08936
0.02284
1963
0.2501
0.2402
0.2027
0.1327
0.09654
0.02469
1964
0.2501
0.2397
0.2081
0.1308
0.09366
0.02371
1965
0.2501
0.2411
0.2056
0.1261
0.09117
0.02334
1966
0.8472
0.8189
0.7016
0.4735
0.3513
0.09016
1967
0.2505
0.2405
0.2105
0.1416
0.1034
0.02677
1968
0.2501
0.2397
0.2008
0.1319
0.09575
0.02443
1969
0.2501
0.2398
0.2009
0.1284
0.0942
0.02413
1970
0.9421
0.9116
0.7595
0.4765
0.3487
0.08916
1971
0.2505
0.2415
0.2067
0.1356
0.0977
0.02526
1972
0.2501
0.2416
0.2082
0.1342
0.09895
0.02545
1973
0.8182
0.7835
0.6472
0.423
0.3101
0.07887
1974
0.2504
0.2395
0.1993
0.1295
0.09487
0.02434
1975
0.8063
0.7798
0.6658
0.4145
0.2999
0.07634
1976
0.6719
0.641
0.5294
0.3448
0.2532
0.0647
1977
0.2504
0.238
0.1923
0.1102
0.0785
0.02004
1978
0.2501
0.24
0.2019
0.1304
0.09465
0.02412
1979
0.2501
0.2411
0.2064
0.1333
0.09659
0.02461
1980
0.2501
0.2403
0.2027
0.1495
0.1213
0.03142
1981
0.2502
0.2389
0.2151
0.1631
0.1202
0.03088
1982
0.3328
0.307
0.2258
0.1865
0.152
0.04018
1983
0.3604
0.3419
0.2761
0.2104
0.1549
0.03928
1984
0.4346
0.418
0.3493
0.2417
0.1763
0.04482
1985
0.2502
0.2379
0.1932
0.1169
0.08449
0.02158
1986
0.2501
0.2394
0.1995
0.1267
0.09228
0.02355
1987
0.2501
0.2398
0.2004
0.1209
0.08587
0.0217
1988
0.2501
0.2406
0.2038
0.1265
0.09035
0.0229
1989
0.2501
0.2409
0.2054
0.1364
0.1006
0.02577
1990
0.2501
0.2404
0.2034
0.1347
0.09844
0.02524
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
0.9421
0.9116
0.7595
0.4765
0.3513
0.09016
0.0645161290322581
0.8472
0.8189
0.7016
0.4735
0.3487
0.08916
0.0967741935483871
0.8182
0.7835
0.6658
0.423
0.3101
0.07887
0.129032258064516
0.8063
0.7798
0.6472
0.4145
0.2999
0.07634
0.161290322580645
0.6719
0.641
0.5294
0.3448
0.2532
0.0647
0.193548387096774
0.4346
0.418
0.3493
0.2417
0.1763
0.04482
0.225806451612903
0.3604
0.3419
0.2761
0.2104
0.1549
0.04018
0.258064516129032
0.3328
0.307
0.2258
0.1865
0.152
0.03928
0.290322580645161
0.2505
0.2422
0.2151
0.1631
0.1213
0.03142
0.32258064516129
0.2505
0.2416
0.2117
0.1495
0.1202
0.03088
171
0.354838709677419
0.2504
0.2415
0.2105
0.1439
0.1062
0.02723
0.387096774193548
0.2504
0.2411
0.2082
0.1416
0.1034
0.02677
0.419354838709677
0.2502
0.2411
0.2081
0.1364
0.1006
0.02577
0.451612903225806
0.2502
0.2409
0.2067
0.1356
0.09895
0.02545
0.483870967741936
0.2502
0.2409
0.2064
0.1347
0.09844
0.02526
0.516129032258065
0.2501
0.2406
0.2056
0.1342
0.0977
0.02524
0.548387096774194
0.2501
0.2405
0.2054
0.1333
0.09659
0.02469
0.580645161290323
0.2501
0.2404
0.2045
0.1327
0.09654
0.02461
0.612903225806452
0.2501
0.2403
0.2038
0.1319
0.09575
0.02443
0.645161290322581
0.2501
0.2402
0.2034
0.1308
0.09487
0.02434
0.67741935483871
0.2501
0.24
0.2027
0.1304
0.09465
0.02413
0.709677419354839
0.2501
0.2398
0.2027
0.1295
0.0942
0.02412
0.741935483870968
0.2501
0.2398
0.2019
0.1284
0.09366
0.02371
0.774193548387097
0.2501
0.2397
0.2009
0.1267
0.09228
0.02355
0.806451612903226
0.2501
0.2397
0.2008
0.1265
0.09117
0.02334
0.838709677419355
0.2501
0.2395
0.2004
0.1261
0.09035
0.0229
0.870967741935484
0.2501
0.2394
0.1995
0.1243
0.08936
0.02284
0.903225806451613
0.2501
0.2389
0.1993
0.1209
0.08587
0.0217
0.935483870967742
0.2501
0.238
0.1932
0.1169
0.08449
0.02158
0.967741935483871
0.25
0.2379
0.1923
0.1102
0.0785
0.02004
0.1
0.81701
0.78313
0.66394
0.42215
0.30908
0.078617
Average
of
yearly
averages:
0.0355836666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMIAaspground
Metfile:
w14848.
dvf
PRZM
scenario:
MIAsparagusC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
172
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicMIAaspaerial.
out
Chemical:
dicamba
PRZM
environment:
MIAsparagusC.
txt
modified
Thuday,
9
June
2005
at
07:
37:
14
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14848.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
42
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.25
1.211
1.059
0.7195
0.5311
0.1361
1962
1.251
1.204
1.022
0.6214
0.4465
0.1141
1963
1.251
1.201
1.014
0.6634
0.4827
0.1234
1964
1.251
1.199
1.008
0.6174
0.4409
0.1116
1965
1.251
1.205
1.028
0.6307
0.4558
0.1167
1966
1.737
1.677
1.435
1.026
0.7571
0.1941
1967
1.251
1.201
1.021
0.682
0.4974
0.128
1968
1.251
1.198
1.004
0.6594
0.4768
0.1213
1969
1.251
1.199
1.005
0.6419
0.4709
0.1206
1970
1.835
1.769
1.482
0.9715
0.7075
0.1809
1971
1.251
1.206
1.032
0.6772
0.4878
0.1248
1972
1.251
1.208
1.041
0.671
0.4947
0.1272
1973
1.652
1.582
1.332
0.9351
0.6804
0.1729
1974
1.251
1.196
0.9956
0.6468
0.4739
0.121
1975
1.735
1.678
1.445
0.9252
0.6675
0.1699
1976
1.442
1.393
1.21
0.8338
0.6055
0.1542
1977
1.251
1.189
0.9609
0.5503
0.3918
0.09934
1978
1.25
1.2
1.01
0.6428
0.4655
0.1185
1979
1.251
1.206
1.032
0.6667
0.4829
0.123
1980
1.251
1.202
1.013
0.6539
0.4847
0.1232
1981
1.251
1.194
1.003
0.6649
0.4827
0.1233
1982
1.251
1.208
1.035
0.6761
0.5045
0.1301
1983
1.251
1.207
1.076
0.7583
0.5506
0.1391
1984
1.298
1.248
1.142
0.7769
0.5633
0.143
1985
1.251
1.189
0.9655
0.5844
0.4221
0.1076
1986
1.25
1.197
0.9975
0.6336
0.4613
0.1177
1987
1.251
1.199
1.002
0.6044
0.4293
0.1085
1988
1.25
1.203
1.019
0.6323
0.4518
0.1138
1989
1.251
1.204
1.027
0.6755
0.4946
0.1264
1990
1.251
1.202
1.017
0.6663
0.4859
0.1245
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
1.835
1.769
1.482
1.026
0.7571
0.1941
0.0645161290322581
1.737
1.678
1.445
0.9715
0.7075
0.1809
0.0967741935483871
1.735
1.677
1.435
0.9351
0.6804
0.1729
0.129032258064516
1.652
1.582
1.332
0.9252
0.6675
0.1699
0.161290322580645
1.442
1.393
1.21
0.8338
0.6055
0.1542
0.193548387096774
1.298
1.248
1.142
0.7769
0.5633
0.143
173
0.225806451612903
1.251
1.211
1.076
0.7583
0.5506
0.1391
0.258064516129032
1.251
1.208
1.059
0.7195
0.5311
0.1361
0.290322580645161
1.251
1.208
1.041
0.682
0.5045
0.1301
0.32258064516129
1.251
1.207
1.035
0.6772
0.4974
0.128
0.354838709677419
1.251
1.206
1.032
0.6761
0.4947
0.1272
0.387096774193548
1.251
1.206
1.032
0.6755
0.4946
0.1264
0.419354838709677
1.251
1.205
1.028
0.671
0.4878
0.1248
0.451612903225806
1.251
1.204
1.027
0.6667
0.4859
0.1245
0.483870967741936
1.251
1.204
1.022
0.6663
0.4847
0.1234
0.516129032258065
1.251
1.203
1.021
0.6649
0.4829
0.1233
0.548387096774194
1.251
1.202
1.019
0.6634
0.4827
0.1232
0.580645161290323
1.251
1.202
1.017
0.6594
0.4827
0.123
0.612903225806452
1.251
1.201
1.014
0.6539
0.4768
0.1213
0.645161290322581
1.251
1.201
1.013
0.6468
0.4739
0.121
0.67741935483871
1.251
1.2
1.01
0.6428
0.4709
0.1206
0.709677419354839
1.251
1.199
1.008
0.6419
0.4655
0.1185
0.741935483870968
1.251
1.199
1.005
0.6336
0.4613
0.1177
0.774193548387097
1.251
1.199
1.004
0.6323
0.4558
0.1167
0.806451612903226
1.251
1.198
1.003
0.6307
0.4518
0.1141
0.838709677419355
1.251
1.197
1.002
0.6214
0.4465
0.1138
0.870967741935484
1.25
1.196
0.9975
0.6174
0.4409
0.1116
0.903225806451613
1.25
1.194
0.9956
0.6044
0.4293
0.1085
0.935483870967742
1.25
1.189
0.9655
0.5844
0.4221
0.1076
0.967741935483871
1.25
1.189
0.9609
0.5503
0.3918
0.09934
0.1
1.7267
1.6675
1.4247
0.93411
0.67911
0.1726
Average
of
yearly
averages:
0.130494666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMIAaspaerial
Metfile:
w14848.
dvf
PRZM
scenario:
MIAsparagusC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
2
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
0.56
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
174
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Florida
Turf
stored
as
dicfFLturfground.
out
Chemical:
dicamba
PRZM
environment:
FLturfC.
txt
modified
Monday,
16
June
2003
at
14:
48:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w12834.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
28
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.12
1.036
0.7594
0.5268
0.3711
0.09259
1962
1.12
1.036
0.7548
0.3835
0.2704
0.06745
1963
1.12
1.022
0.832
0.542
0.3767
0.09374
1964
3.296
2.99
2.003
1.128
0.7859
0.195
1965
1.12
1.027
0.729
0.3833
0.2765
0.06954
1966
1.141
1.028
0.7327
0.5747
0.3987
0.09914
1967
1.12
1.02
0.7068
0.4005
0.2982
0.07521
1968
1.12
1.021
0.7098
0.3597
0.2461
0.06094
1969
1.12
1.025
0.7302
0.5132
0.3621
0.0903
1970
1.12
1.016
0.6946
0.403
0.2863
0.07148
1971
1.12
1.031
0.7408
0.4502
0.3162
0.07894
1972
1.12
1.025
0.7227
0.371
0.2544
0.06301
1973
1.12
1.029
0.7356
0.3762
0.2585
0.06423
1974
1.12
1.028
0.7304
0.3691
0.2535
0.063
1975
1.578
1.445
1.018
0.5079
0.3479
0.08641
1976
1.12
1.023
0.7729
0.551
0.3842
0.09548
1977
1.12
1.026
0.7247
0.3772
0.2602
0.06466
1978
17.7
16.09
11
5.367
3.669
0.9102
1979
1.445
1.314
1.005
0.559
0.3852
0.09598
1980
1.686
1.519
1.019
0.7268
0.5186
0.1292
1981
1.12
1.024
0.7196
0.4453
0.3228
0.08087
1982
1.12
1.018
0.7018
0.3836
0.2684
0.06694
1983
2.424
2.252
1.68
0.8827
0.6093
0.1515
1984
1.12
1.03
0.7381
0.5749
0.4364
0.1102
1985
1.12
1.027
0.7264
0.3662
0.2504
0.0622
1986
1.12
1.036
0.7576
0.3932
0.2705
0.06716
1987
1.12
1.042
0.7778
0.461
0.3194
0.07947
1988
1.12
1.029
0.7609
0.4135
0.2856
0.07085
1989
1.802
1.672
1.119
0.7291
0.5084
0.1265
1990
1.12
1.028
0.7286
0.3616
0.2473
0.06141
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
17.7
16.09
11
5.367
3.669
0.9102
175
0.0645161290322581
3.296
2.99
2.003
1.128
0.7859
0.195
0.0967741935483871
2.424
2.252
1.68
0.8827
0.6093
0.1515
0.129032258064516
1.802
1.672
1.119
0.7291
0.5186
0.1292
0.161290322580645
1.686
1.519
1.019
0.7268
0.5084
0.1265
0.193548387096774
1.578
1.445
1.018
0.5749
0.4364
0.1102
0.225806451612903
1.445
1.314
1.005
0.5747
0.3987
0.09914
0.258064516129032
1.141
1.042
0.832
0.559
0.3852
0.09598
0.290322580645161
1.12
1.036
0.7778
0.551
0.3842
0.09548
0.32258064516129
1.12
1.036
0.7729
0.542
0.3767
0.09374
0.354838709677419
1.12
1.036
0.7609
0.5268
0.3711
0.09259
0.387096774193548
1.12
1.031
0.7594
0.5132
0.3621
0.0903
0.419354838709677
1.12
1.03
0.7576
0.5079
0.3479
0.08641
0.451612903225806
1.12
1.029
0.7548
0.461
0.3228
0.08087
0.483870967741936
1.12
1.029
0.7408
0.4502
0.3194
0.07947
0.516129032258065
1.12
1.028
0.7381
0.4453
0.3162
0.07894
0.548387096774194
1.12
1.028
0.7356
0.4135
0.2982
0.07521
0.580645161290323
1.12
1.028
0.7327
0.403
0.2863
0.07148
0.612903225806452
1.12
1.027
0.7304
0.4005
0.2856
0.07085
0.645161290322581
1.12
1.027
0.7302
0.3932
0.2765
0.06954
0.67741935483871
1.12
1.026
0.729
0.3836
0.2705
0.06745
0.709677419354839
1.12
1.025
0.7286
0.3835
0.2704
0.06716
0.741935483870968
1.12
1.025
0.7264
0.3833
0.2684
0.06694
0.774193548387097
1.12
1.024
0.7247
0.3772
0.2602
0.06466
0.806451612903226
1.12
1.023
0.7227
0.3762
0.2585
0.06423
0.838709677419355
1.12
1.022
0.7196
0.371
0.2544
0.06301
0.870967741935484
1.12
1.021
0.7098
0.3691
0.2535
0.063
0.903225806451613
1.12
1.02
0.7068
0.3662
0.2504
0.0622
0.935483870967742
1.12
1.018
0.7018
0.3616
0.2473
0.06141
0.967741935483871
1.12
1.016
0.6946
0.3597
0.2461
0.06094
0.1
2.3618
2.194
1.6239
0.86734
0.60023
0.14927
Average
of
yearly
averages:
0.114786666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicfFLturfground
Metfile:
w12834.
dvf
PRZM
scenario:
FLturfC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
1
integer
See
PRZM
manual
176
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicfFLturfaerial.
out
Chemical:
dicamba
PRZM
environment:
FLturfC.
txt
modified
Monday,
16
June
2003
at
14:
48:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w12834.
dvf
modified
Wedday,
3
July
2002
at
09:
04:
28
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
5.6
5.182
3.797
2.111
1.464
0.3642
1962
5.6
5.178
3.774
1.914
1.32
0.3282
1963
5.6
5.112
3.68
1.951
1.335
0.3316
1964
5.6
5.082
4.297
2.49
1.717
0.4255
1965
5.6
5.134
3.645
1.899
1.322
0.3298
1966
5.6
5.142
3.663
2.052
1.405
0.3486
1967
5.6
5.1
3.534
1.825
1.277
0.3187
1968
5.6
5.105
3.549
1.789
1.223
0.3026
1969
5.6
5.124
3.614
1.966
1.356
0.3369
1970
5.6
5.081
3.473
1.777
1.225
0.3044
1971
5.6
5.154
3.704
1.986
1.374
0.342
1972
5.6
5.125
3.613
1.846
1.265
0.3133
1973
5.6
5.147
3.678
1.879
1.291
0.3206
1974
5.6
5.139
3.652
1.844
1.266
0.3146
1975
6.04
5.529
3.895
1.944
1.331
0.3307
1976
5.6
5.114
3.634
1.998
1.375
0.3411
1977
5.6
5.129
3.623
1.847
1.266
0.3142
1978
20.9
19
12.98
6.534
4.464
1.107
1979
5.6
5.093
3.798
1.928
1.322
0.3284
1980
5.6
5.146
3.677
2.214
1.539
0.3818
1981
5.6
5.12
3.598
1.918
1.332
0.3313
1982
5.6
5.09
3.509
1.817
1.251
0.3112
1983
6.851
6.365
4.732
2.479
1.71
0.4251
1984
5.6
5.151
3.691
2.074
1.469
0.3664
1985
5.6
5.133
3.632
1.825
1.247
0.3097
1986
5.6
5.18
3.788
1.966
1.352
0.3358
1987
5.6
5.212
3.889
2.074
1.428
0.3548
1988
5.6
5.146
3.704
1.945
1.34
0.3323
1989
5.6
5.134
3.938
2.189
1.509
0.375
1990
5.6
5.138
3.643
1.808
1.236
0.3069
177
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
20.9
19
12.98
6.534
4.464
1.107
0.0645161290322581
6.851
6.365
4.732
2.49
1.717
0.4255
0.0967741935483871
6.04
5.529
4.297
2.479
1.71
0.4251
0.129032258064516
5.6
5.212
3.938
2.214
1.539
0.3818
0.161290322580645
5.6
5.182
3.895
2.189
1.509
0.375
0.193548387096774
5.6
5.18
3.889
2.111
1.469
0.3664
0.225806451612903
5.6
5.178
3.798
2.074
1.464
0.3642
0.258064516129032
5.6
5.154
3.797
2.074
1.428
0.3548
0.290322580645161
5.6
5.151
3.788
2.052
1.405
0.3486
0.32258064516129
5.6
5.147
3.774
1.998
1.375
0.342
0.354838709677419
5.6
5.146
3.704
1.986
1.374
0.3411
0.387096774193548
5.6
5.146
3.704
1.966
1.356
0.3369
0.419354838709677
5.6
5.142
3.691
1.966
1.352
0.3358
0.451612903225806
5.6
5.139
3.68
1.951
1.34
0.3323
0.483870967741936
5.6
5.138
3.678
1.945
1.335
0.3316
0.516129032258065
5.6
5.134
3.677
1.944
1.332
0.3313
0.548387096774194
5.6
5.134
3.663
1.928
1.331
0.3307
0.580645161290323
5.6
5.133
3.652
1.918
1.322
0.3298
0.612903225806452
5.6
5.129
3.645
1.914
1.322
0.3284
0.645161290322581
5.6
5.125
3.643
1.899
1.32
0.3282
0.67741935483871
5.6
5.124
3.634
1.879
1.291
0.3206
0.709677419354839
5.6
5.12
3.632
1.847
1.277
0.3187
0.741935483870968
5.6
5.114
3.623
1.846
1.266
0.3146
0.774193548387097
5.6
5.112
3.614
1.844
1.266
0.3142
0.806451612903226
5.6
5.105
3.613
1.825
1.265
0.3133
0.838709677419355
5.6
5.1
3.598
1.825
1.251
0.3112
0.870967741935484
5.6
5.093
3.549
1.817
1.247
0.3097
0.903225806451613
5.6
5.09
3.534
1.808
1.236
0.3069
0.935483870967742
5.6
5.082
3.509
1.789
1.225
0.3044
0.967741935483871
5.6
5.081
3.473
1.777
1.223
0.3026
0.1
5.996
5.4973
4.2611
2.4525
1.6929
0.42077
Average
of
yearly
averages:
0.364423333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicfFLturfaerial
Metfile:
w12834.
dvf
PRZM
scenario:
FLturfC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
178
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
1
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Dicamba
Pennsylvania
Turf
stored
as
dicfPAturfground.
out
Chemical:
dicamba
PRZM
environment:
PAturfC.
txt
modified
Satday,
12
October
2002
at
17:
27:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14737.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
12
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
1.12
1.079
0.922
0.6039
0.4395
0.1115
1962
1.12
1.074
0.8978
0.5549
0.3982
0.1014
1963
1.12
1.074
0.8994
0.5784
0.42
0.107
1964
1.804
1.735
1.437
0.9345
0.6778
0.1722
1965
1.121
1.08
0.9199
0.5642
0.4066
0.1037
1966
1.12
1.082
0.9338
0.6186
0.4486
0.1137
1967
1.121
1.078
0.9489
0.6587
0.4788
0.1224
1968
9.885
9.431
7.645
4.799
3.524
0.901
1969
1.127
1.093
0.9403
0.5801
0.417
0.108
1970
1.121
1.07
0.8851
0.5556
0.4034
0.1027
1971
1.12
1.079
0.9186
0.6457
0.4742
0.121
1972
1.522
1.467
1.253
0.7781
0.5582
0.1411
1973
1.121
1.073
0.8966
0.5811
0.4173
0.1056
1974
1.12
1.068
0.8781
0.5755
0.4221
0.1079
1975
1.121
1.08
0.9201
0.566
0.4068
0.1032
1976
1.12
1.069
0.8794
0.5587
0.4017
0.1018
1977
1.12
1.068
0.8755
0.5274
0.3785
0.09587
1978
1.12
1.074
0.8982
0.5714
0.4118
0.1045
1979
1.12
1.075
0.9261
0.584
0.4232
0.1077
1980
1.12
1.07
0.9294
0.5916
0.4277
0.1079
1981
1.12
1.071
0.8875
0.5934
0.4284
0.1088
1982
1.121
1.079
0.9352
0.5893
0.4272
0.1088
1983
4.022
3.847
3.192
2.063
1.491
0.3769
1984
1.165
1.123
0.9475
0.5846
0.4169
0.1055
1985
2.581
2.403
1.855
1.223
0.9184
0.2352
179
1986
6.875
6.658
5.481
3.271
2.346
0.595
1987
1.123
1.073
0.8878
0.55
0.3937
0.1007
1988
1.12
1.078
0.9108
0.5529
0.3964
0.0998
1989
1.12
1.076
0.9208
0.6402
0.4654
0.1186
1990
1.12
1.071
0.8886
0.5772
0.4181
0.1062
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
9.885
9.431
7.645
4.799
3.524
0.901
0.0645161290322581
6.875
6.658
5.481
3.271
2.346
0.595
0.0967741935483871
4.022
3.847
3.192
2.063
1.491
0.3769
0.129032258064516
2.581
2.403
1.855
1.223
0.9184
0.2352
0.161290322580645
1.804
1.735
1.437
0.9345
0.6778
0.1722
0.193548387096774
1.522
1.467
1.253
0.7781
0.5582
0.1411
0.225806451612903
1.165
1.123
0.9489
0.6587
0.4788
0.1224
0.258064516129032
1.127
1.093
0.9475
0.6457
0.4742
0.121
0.290322580645161
1.123
1.082
0.9403
0.6402
0.4654
0.1186
0.32258064516129
1.121
1.08
0.9352
0.6186
0.4486
0.1137
0.354838709677419
1.121
1.08
0.9338
0.6039
0.4395
0.1115
0.387096774193548
1.121
1.079
0.9294
0.5934
0.4284
0.1088
0.419354838709677
1.121
1.079
0.9261
0.5916
0.4277
0.1088
0.451612903225806
1.121
1.079
0.922
0.5893
0.4272
0.108
0.483870967741936
1.121
1.078
0.9208
0.5846
0.4232
0.1079
0.516129032258065
1.12
1.078
0.9201
0.584
0.4221
0.1079
0.548387096774194
1.12
1.076
0.9199
0.5811
0.42
0.1077
0.580645161290323
1.12
1.075
0.9186
0.5801
0.4181
0.107
0.612903225806452
1.12
1.074
0.9108
0.5784
0.4173
0.1062
0.645161290322581
1.12
1.074
0.8994
0.5772
0.417
0.1056
0.67741935483871
1.12
1.074
0.8982
0.5755
0.4169
0.1055
0.709677419354839
1.12
1.073
0.8978
0.5714
0.4118
0.1045
0.741935483870968
1.12
1.073
0.8966
0.566
0.4068
0.1037
0.774193548387097
1.12
1.071
0.8886
0.5642
0.4066
0.1032
0.806451612903226
1.12
1.071
0.8878
0.5587
0.4034
0.1027
0.838709677419355
1.12
1.07
0.8875
0.5556
0.4017
0.1018
0.870967741935484
1.12
1.07
0.8851
0.5549
0.3982
0.1014
0.903225806451613
1.12
1.069
0.8794
0.5529
0.3964
0.1007
0.935483870967742
1.12
1.068
0.8781
0.55
0.3937
0.0998
0.967741935483871
1.12
1.068
0.8755
0.5274
0.3785
0.09587
0.1
3.8779
3.7026
3.0583
1.979
1.43374
0.36273
Average
of
yearly
averages:
0.166522333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicfPAturfground
Metfile:
w14737.
dvf
PRZM
scenario:
PAturfC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
180
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
1
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicfPAturfaerial.
out
Chemical:
dicamba
PRZM
environment:
PAturfC.
txt
modified
Satday,
12
October
2002
at
17:
27:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w14737.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
12
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
5.6
5.395
4.61
3.019
2.197
0.5573
1962
5.602
5.37
4.489
2.775
1.99
0.5066
1963
5.602
5.369
4.497
2.892
2.1
0.5351
1964
5.831
5.606
5.043
3.175
2.293
0.5824
1965
5.603
5.399
4.598
2.82
2.032
0.5176
1966
5.602
5.41
4.665
3.088
2.239
0.5676
1967
5.603
5.388
4.612
3.128
2.27
0.5799
1968
13.14
12.54
10.16
6.789
5.057
1.291
1969
5.607
5.37
4.46
2.738
1.968
0.501
1970
5.602
5.352
4.425
2.778
2.017
0.5134
1971
5.602
5.393
4.593
3.051
2.222
0.5656
1972
5.904
5.694
4.92
3.039
2.179
0.5507
1973
5.602
5.365
4.483
2.905
2.086
0.5275
1974
5.602
5.342
4.39
2.797
2.042
0.5211
1975
5.602
5.399
4.601
2.83
2.034
0.516
1976
5.602
5.343
4.397
2.793
2.008
0.5089
1977
5.602
5.342
4.377
2.637
1.892
0.4793
1978
5.602
5.369
4.491
2.813
2.022
0.5129
1979
5.602
5.376
4.536
2.814
2.035
0.5177
1980
5.602
5.351
4.459
2.743
1.976
0.498
1981
5.602
5.356
4.437
2.785
1.996
0.5057
1982
5.602
5.393
4.599
2.862
2.071
0.5271
181
1983
8.286
7.924
6.655
4.282
3.094
0.7824
1984
5.603
5.412
4.517
2.768
1.973
0.4974
1985
5.602
5.339
4.681
3.301
2.415
0.6146
1986
11.02
10.61
8.72
5.267
3.774
0.9573
1987
5.604
5.356
4.432
2.745
1.965
0.4978
1988
5.602
5.388
4.554
2.764
1.981
0.4989
1989
5.602
5.381
4.55
2.919
2.107
0.5359
1990
5.602
5.357
4.443
2.8
2.02
0.5125
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
13.14
12.54
10.16
6.789
5.057
1.291
0.0645161290322581
11.02
10.61
8.72
5.267
3.774
0.9573
0.0967741935483871
8.286
7.924
6.655
4.282
3.094
0.7824
0.129032258064516
5.904
5.694
5.043
3.301
2.415
0.6146
0.161290322580645
5.831
5.606
4.92
3.175
2.293
0.5824
0.193548387096774
5.607
5.412
4.681
3.128
2.27
0.5799
0.225806451612903
5.604
5.41
4.665
3.088
2.239
0.5676
0.258064516129032
5.603
5.399
4.612
3.051
2.222
0.5656
0.290322580645161
5.603
5.399
4.61
3.039
2.197
0.5573
0.32258064516129
5.603
5.395
4.601
3.019
2.179
0.5507
0.354838709677419
5.602
5.393
4.599
2.919
2.107
0.5359
0.387096774193548
5.602
5.393
4.598
2.905
2.1
0.5351
0.419354838709677
5.602
5.388
4.593
2.892
2.086
0.5275
0.451612903225806
5.602
5.388
4.554
2.862
2.071
0.5271
0.483870967741936
5.602
5.381
4.55
2.83
2.042
0.5211
0.516129032258065
5.602
5.376
4.536
2.82
2.035
0.5177
0.548387096774194
5.602
5.37
4.517
2.814
2.034
0.5176
0.580645161290323
5.602
5.37
4.497
2.813
2.032
0.516
0.612903225806452
5.602
5.369
4.491
2.8
2.022
0.5134
0.645161290322581
5.602
5.369
4.489
2.797
2.02
0.5129
0.67741935483871
5.602
5.365
4.483
2.793
2.017
0.5125
0.709677419354839
5.602
5.357
4.46
2.785
2.008
0.5089
0.741935483870968
5.602
5.356
4.459
2.778
1.996
0.5066
0.774193548387097
5.602
5.356
4.443
2.775
1.99
0.5057
0.806451612903226
5.602
5.352
4.437
2.768
1.981
0.501
0.838709677419355
5.602
5.351
4.432
2.764
1.976
0.4989
0.870967741935484
5.602
5.343
4.425
2.745
1.973
0.498
0.903225806451613
5.602
5.342
4.397
2.743
1.968
0.4978
0.935483870967742
5.602
5.342
4.39
2.738
1.965
0.4974
0.967741935483871
5.6
5.339
4.377
2.637
1.892
0.4793
0.1
8.0478
7.701
6.4938
4.1839
3.0261
0.76562
Average
of
yearly
averages:
0.575973333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicfPAturfaerial
Metfile:
w14737.
dvf
PRZM
scenario:
PAturfC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
182
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
1
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
15­
04
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)
183
Dicamba
Mississippi
Soybean
stored
as
dicMSsoybeanground.
out
Chemical:
dicamba
PRZM
environment:
MSsoybeanC.
txt
modified
Satday,
12
October
2002
at
17:
07:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13893.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
20
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
5.323
4.892
3.707
2.027
1.413
0.3523
1962
1.12
0.9993
0.6455
0.3394
0.2346
0.05868
1963
3.057
2.794
1.803
1.036
0.7428
0.1862
1964
6.972
6.333
4.517
2.305
1.576
0.3906
1965
1.12
0.9913
0.6388
0.3739
0.2585
0.06459
1966
9.735
8.91
6.407
3.381
2.32
0.5765
1967
17.5
15.9
11.71
6.312
4.341
1.081
1968
2.789
2.578
1.81
1.011
0.6965
0.1739
1969
2.722
2.472
1.701
0.9404
0.6461
0.1606
1970
29.07
26.31
17.88
8.935
6.11
1.517
1971
3.715
3.41
2.444
1.334
0.924
0.2316
1972
36.21
32.99
22.99
11.65
7.946
1.967
1973
28.62
26.08
18.78
9.571
6.523
1.619
1974
2.115
1.889
1.232
0.7526
0.5221
0.131
1975
17.14
15.32
10.52
5.152
3.527
0.8763
1976
8.642
7.949
5.722
3.046
2.111
0.5248
1977
1.12
1.003
0.6558
0.3153
0.2145
0.05394
1978
8.775
7.96
5.862
2.901
1.975
0.4894
1979
33.76
30.78
20.91
10.29
7.023
1.742
1980
7.958
7.175
5.183
2.515
1.711
0.424
1981
2.024
1.841
1.319
0.7574
0.5171
0.1287
1982
1.12
1.005
0.6793
0.4182
0.2871
0.07136
1983
5.092
4.673
3.278
1.721
1.196
0.297
1984
34.34
30.82
20.39
9.796
6.666
1.649
1985
1.121
1.02
0.7237
0.4567
0.3148
0.07975
1986
1.398
1.266
1.015
0.5787
0.3952
0.09806
1987
1.12
1.003
0.6579
0.3528
0.2415
0.06001
1988
1.12
1.017
0.6999
0.399
0.2739
0.06782
1989
1.12
1.026
0.7274
0.3903
0.2675
0.06645
1990
3.491
3.202
2.306
1.228
0.8387
0.2081
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
36.21
32.99
22.99
11.65
7.946
1.967
0.0645161290322581
34.34
30.82
20.91
10.29
7.023
1.742
0.0967741935483871
33.76
30.78
20.39
9.796
6.666
1.649
0.129032258064516
29.07
26.31
18.78
9.571
6.523
1.619
0.161290322580645
28.62
26.08
17.88
8.935
6.11
1.517
0.193548387096774
17.5
15.9
11.71
6.312
4.341
1.081
0.225806451612903
17.14
15.32
10.52
5.152
3.527
0.8763
0.258064516129032
9.735
8.91
6.407
3.381
2.32
0.5765
0.290322580645161
8.775
7.96
5.862
3.046
2.111
0.5248
0.32258064516129
8.642
7.949
5.722
2.901
1.975
0.4894
0.354838709677419
7.958
7.175
5.183
2.515
1.711
0.424
184
0.387096774193548
6.972
6.333
4.517
2.305
1.576
0.3906
0.419354838709677
5.323
4.892
3.707
2.027
1.413
0.3523
0.451612903225806
5.092
4.673
3.278
1.721
1.196
0.297
0.483870967741936
3.715
3.41
2.444
1.334
0.924
0.2316
0.516129032258065
3.491
3.202
2.306
1.228
0.8387
0.2081
0.548387096774194
3.057
2.794
1.81
1.036
0.7428
0.1862
0.580645161290323
2.789
2.578
1.803
1.011
0.6965
0.1739
0.612903225806452
2.722
2.472
1.701
0.9404
0.6461
0.1606
0.645161290322581
2.115
1.889
1.319
0.7574
0.5221
0.131
0.67741935483871
2.024
1.841
1.232
0.7526
0.5171
0.1287
0.709677419354839
1.398
1.266
1.015
0.5787
0.3952
0.09806
0.741935483870968
1.121
1.026
0.7274
0.4567
0.3148
0.07975
0.774193548387097
1.12
1.02
0.7237
0.4182
0.2871
0.07136
0.806451612903226
1.12
1.017
0.6999
0.399
0.2739
0.06782
0.838709677419355
1.12
1.005
0.6793
0.3903
0.2675
0.06645
0.870967741935484
1.12
1.003
0.6579
0.3739
0.2585
0.06459
0.903225806451613
1.12
1.003
0.6558
0.3528
0.2415
0.06001
0.935483870967742
1.12
0.9993
0.6455
0.3394
0.2346
0.05868
0.967741935483871
1.12
0.9913
0.6388
0.3153
0.2145
0.05394
0.1
33.291
30.333
20.229
9.7735
6.6517
1.646
Average
of
yearly
averages:
0.511555333333333
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMSsoybeanground
Metfile:
w13893.
dvf
PRZM
scenario:
MSsoybeanC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
1
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.99
fraction
Spray
Drift
DRFT
.01
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
185
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

stored
as
dicMSsoybeanaerial.
out
Chemical:
dicamba
PRZM
environment:
MSsoybeanC.
txt
modified
Satday,
12
October
2002
at
17:
07:
00
EXAMS
environment:
pond298.
exv
modified
Thuday,
24
July
2003
at
10:
02:
00
Metfile:
w13893.
dvf
modified
Wedday,
3
July
2002
at
09:
06:
20
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
8.458
7.882
6.169
3.533
2.454
0.6115
1962
5.601
4.995
3.226
1.576
1.078
0.2682
1963
5.6
5.07
3.449
2.38
1.659
0.4139
1964
11
9.989
7.086
3.634
2.483
0.6153
1965
5.6
4.956
3.132
1.541
1.053
0.2619
1966
13.87
12.69
9.074
4.769
3.272
0.8131
1967
20.34
18.49
14.08
7.496
5.152
1.283
1968
5.601
5.111
4.311
2.429
1.662
0.413
1969
5.823
5.289
4.391
2.329
1.594
0.3959
1970
32.42
29.34
19.94
9.964
6.814
1.692
1971
6.367
5.845
4.79
2.818
1.938
0.4836
1972
39.27
35.78
24.92
12.63
8.613
2.132
1973
31.99
29.15
20.89
10.63
7.248
1.798
1974
5.601
5.002
3.67
1.986
1.363
0.3397
1975
20.48
18.31
12.45
6.213
4.25
1.056
1976
11.96
11
7.917
4.512
3.119
0.7748
1977
5.6
5.013
3.278
1.567
1.063
0.2644
1978
12.48
11.28
8.131
4.088
2.781
0.6892
1979
36.48
33.23
22.57
11.25
7.673
1.904
1980
10.17
9.17
6.506
3.731
2.53
0.6262
1981
5.6
5.094
4.099
2.147
1.461
0.3626
1982
5.6
5.022
3.323
1.695
1.155
0.2865
1983
7.07
6.441
4.956
2.948
2.032
0.5044
1984
37.23
33.4
22.06
10.67
7.257
1.795
1985
5.601
5.097
3.547
1.882
1.288
0.3212
1986
5.6
5.069
3.758
1.933
1.315
0.3261
1987
5.6
5.017
3.289
1.617
1.101
0.2732
1988
5.6
5.083
3.491
1.787
1.218
0.3014
1989
5.6
5.13
3.637
1.898
1.299
0.3227
1990
7.681
7.045
5.15
2.702
1.843
0.4574
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032258064516129
39.27
35.78
24.92
12.63
8.613
2.132
0.0645161290322581
37.23
33.4
22.57
11.25
7.673
1.904
0.0967741935483871
36.48
33.23
22.06
10.67
7.257
1.798
0.129032258064516
32.42
29.34
20.89
10.63
7.248
1.795
0.161290322580645
31.99
29.15
19.94
9.964
6.814
1.692
0.193548387096774
20.48
18.49
14.08
7.496
5.152
1.283
0.225806451612903
20.34
18.31
12.45
6.213
4.25
1.056
0.258064516129032
13.87
12.69
9.074
4.769
3.272
0.8131
0.290322580645161
12.48
11.28
8.131
4.512
3.119
0.7748
186
0.32258064516129
11.96
11
7.917
4.088
2.781
0.6892
0.354838709677419
11
9.989
7.086
3.731
2.53
0.6262
0.387096774193548
10.17
9.17
6.506
3.634
2.483
0.6153
0.419354838709677
8.458
7.882
6.169
3.533
2.454
0.6115
0.451612903225806
7.681
7.045
5.15
2.948
2.032
0.5044
0.483870967741936
7.07
6.441
4.956
2.818
1.938
0.4836
0.516129032258065
6.367
5.845
4.79
2.702
1.843
0.4574
0.548387096774194
5.823
5.289
4.391
2.429
1.662
0.4139
0.580645161290323
5.601
5.13
4.311
2.38
1.659
0.413
0.612903225806452
5.601
5.111
4.099
2.329
1.594
0.3959
0.645161290322581
5.601
5.097
3.758
2.147
1.461
0.3626
0.67741935483871
5.601
5.094
3.67
1.986
1.363
0.3397
0.709677419354839
5.6
5.083
3.637
1.933
1.315
0.3261
0.741935483870968
5.6
5.07
3.547
1.898
1.299
0.3227
0.774193548387097
5.6
5.069
3.491
1.882
1.288
0.3212
0.806451612903226
5.6
5.022
3.449
1.787
1.218
0.3014
0.838709677419355
5.6
5.017
3.323
1.695
1.155
0.2865
0.870967741935484
5.6
5.013
3.289
1.617
1.101
0.2732
0.903225806451613
5.6
5.002
3.278
1.576
1.078
0.2682
0.935483870967742
5.6
4.995
3.226
1.567
1.063
0.2644
0.967741935483871
5.6
4.956
3.132
1.541
1.053
0.2619
0.1
36.074
32.841
21.943
10.666
7.2561
1.7977
Average
of
yearly
averages:
0.726206666666667
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
dicMSsoybeanaerial
Metfile:
w13893.
dvf
PRZM
scenario:
MSsoybeanC.
txt
EXAMS
environment
file:
pond298.
exv
Chemical
Name:
dicamba
Description
Variable
Name
Value
Units
Comments
Molecular
weight
mwt
221.04
g/
mol
Henry's
Law
Const.
henry
1.6e­
09
atm­
m^
3/
mol
Vapor
Pressure
vapr
3.41e­
05
torr
Solubility
sol
6100
mg/
L
Kd
Kd
mg/
L
Koc
Koc
13.4
mg/
L
Photolysis
half­
life
kdp
38.1
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
12
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
423
days
Halfife
Aerobic
Soil
Metabolism
asm
18
days
Halfife
Hydrolysis:
pH
7
0
days
Half­
life
Method:
CAM
1
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
0
cm
Application
Rate:
TAPP
2.24
kg/
ha
Application
Efficiency:
APPEFF
.95
fraction
Spray
Drift
DRFT
.05
fraction
of
application
rate
applied
to
pond
Application
Date
Date
01­
05
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
IPSCND
1
UPTKF
187
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
Pond
Flag
for
runoff
calc.
RUNOFF
none,
monthly
or
total(
average
of
entire
run)

Appendix
C:
Terrestrial
Bird
and
Mammal
Model
Results
T­
REX
Version
1.2.3
August
8
2005
TREX
MODEL
INPUTS
These
values
will
be
used
in
the
calculation
of
exposure
estimates
for
foliar,
granular,
liquid
and/
or
seed
applications
of
pesticides
Chemical
Name:
dicamba
Use:
sugarcane
Product
name
and
form:
%
A.
I.:
100
Application
Rate
(
lbs/
A):
2.8
Half­
life
(
days):
35
Application
Interval
(
days):

Number
of
Applications:
1
Note:
Sources
of
wildlife
diet
are
assumed
to
be
available
for
less
than
one
year
for
this
model.

Endpoints
Avian
LD50
(
mg/
kg­
bw)
188.00
bobwhite
quail
LC50
(
mg/
kg­
diet)

NOAEL
(
mg/
kg­
bw)

NOAEC
(
mg/
kg­
diet)
695.00
mallard
duck
Enter
the
Mineau
et
al.
Scaling
Factor
1.15
Mammals
LD50
(
mg/
kg­
bw)
2740.00
rat
LC50
(
mg/
kg­
diet)
188
Reported
Chronic
Endpoint
45.00
rat
Estimated
Chronic
Daily
Dose
Equivalent
to
reported
Chronic
Dietary
Endpoint
900
mg/
kg­
diet
based
on
standard
FDA
lab
rat
conversion
Upper
Bound
Kenaga
Residues
For
RQ
Calculation
Dietary­
based
EECs
(
ppm)
Kenaga
Values
Short
Grass
672.00
Tall
Grass
308.00
Broadleaf
plants/
sm
Insects
378.00
Fruits/
pods/
seeds/
lg
insects
42.00
Avian
Results
Avian
Body
Ingestion
(
Fdry)
Ingestion
(
Fwet)
%
body
wgt
FI
Class
Weight
(
g)
(
g
bw/
day)
(
g/
day)
consumed
(
kg­
diet/
day)
Small
20
5
23
114
2.28E­
02
Mid
100
13
65
65
6.49E­
02
Large
1000
58
291
29
2.91E­
01
Avian
Body
Weight
(
g)
Adjusted
LD50
(
mg/
kg­
bw)
20
135.44
100
172.42
1000
243.55
Dose­
based
EECs
(
mg/
kg­
bw)
Avian
Classes
and
Body
Weights
small
mid
large
20
g
100
g
1000
g
Short
Grass
765.34
436.43
195.40
Tall
Grass
350.78
200.03
89.56
Broadleaf
plants/
sm
Insects
430.50
245.49
109.91
Fruits/
pods/
seeds/
lg
insects
47.83
27.28
12.21
Dose­
based
RQs
(
Dose­
based
EEC/
adjusted
LD50)
Avian
Acute
RQs
20
g
100
g
1000
g
Short
Grass
5.65
2.53
0.80
Tall
Grass
2.59
1.16
0.37
Broadleaf
plants/
sm
insects
3.18
1.42
0.45
189
Fruits/
pods/
seeds/
lg
insects
0.35
0.16
0.05
190
Dietary­
based
RQs
(
Dietary­
based
EEC/
LC50
or
NOAEC)
RQs
Acute
Chronic
Short
Grass
#
DIV/
0!
0.97
Tall
Grass
#
DIV/
0!
0.44
Broadleaf
plants/
sm
Insects
#
DIV/
0!
0.54
Fruits/
pods/
seeds/
lg
insects
#
DIV/
0!
0.06
Mammalian
Results
Mammalian
Body
Ingestion
(
Fdry)
Ingestion
(
Fwet)
%
body
wgt
FI
Class
Weight
(
g
bwt/
day)
(
g/
day)
consumed
(
kg­
diet/
day)
15
3
14
95
1.43E­
02
Herbivores/
35
5
23
66
2.31E­
02
insectivores
1000
31
153
15
1.53E­
01
15
3
3
21
3.18E­
03
Grainvores
35
5
5
15
5.13E­
03
1000
31
34
3
3.40E­
02
Mammalian
Body
Adjusted
Adjusted
Class
Weight
LD50
NOAEL
15
6022.06
98.90
Herbivores/
35
4872.49
80.02
insectivores
1000
2107.50
34.61
15
6022.06
98.90
Grainvores
35
4872.49
80.02
1000
2107.50
34.61
Dose­
Based
EECs
(
mg/
kg­
bw)
Mammalian
Classes
and
Body
weight
Herbivores/
insectivores
Granivores
15
g
35
g
1000
g
15
g
35
g
1000
g
Short
Grass
640.70
442.81
102.67
Tall
Grass
293.65
202.95
47.06
Broadleaf
plants/
sm
Insects
360.39
249.08
57.75
Fruits/
pods/
seeds/
lg
insects
40.04
27.68
6.42
8.90
6.15
1.43
191
Dose­
based
RQs
(
Dose­
based
EEC/
LD50
or
NOAEL)
15
g
mammal
35
g
mammal
1000
g
mammal
Acute
Chronic
Acute
Chronic
Acute
Chronic
Short
Grass
0.11
6.48
0.09
5.53
0.05
2.97
Tall
Grass
0.05
2.97
0.04
2.54
0.02
1.36
Broadleaf
plants/
sm
insects
0.06
3.64
0.05
3.11
0.03
1.67
Fruits/
pods/
lg
insects
0.01
0.40
0.01
0.35
0.00
0.19
Seeds
(
granivore)
0.00
0.09
0.00
0.08
0.00
0.04
Dietary­
based
RQs
(
Dietarybased
EEC/
LC50
or
NOAEC)
Mammal
RQs
Acute
Chronic
Short
Grass
#
DIV/
0!
0.75
Tall
Grass
#
DIV/
0!
0.34
Broadleaf
plants/
sm
insects
#
DIV/
0!
0.42
Fruits/
pods/
seeds/
lg
insects
#
DIV/
0!
0.05
Mean
Kenaga
Residues
Dietary­
based
EECs
(
ppm)
Kenaga
Values
Short
Grass
238.00
Tall
Grass
100.80
Broadleaf
plants/
sm
Insects
126.00
Fruits/
pods/
seeds/
lg
insects
19.60
Avian
Results
Avian
Body
%
body
wgt
Adjusted
Class
Weight
consumed
LD50
Small
20
114
135.44
Mid
100
65
172.42
Large
1000
29
243.55
192
Dose­
based
EEC
(
mg/
kg­
bw)
Avian
Classes
and
Body
Weights
small
mid
large
20
g
100
g
1000
g
Short
Grass
271.32
154.70
69.02
Tall
Grass
114.91
65.52
29.23
Broadleaf
plants/
sm
Insects
143.64
81.90
36.54
Fruits/
pods/
lg
insects
22.34
12.74
5.68
Dose­
based
RQs
(
Dose­
based
EEC/
LD50)
Avian
Acute
"
RQs"

20
g
100
g
1000
g
Short
Grass
2.00
0.90
0.28
Tall
Grass
0.85
0.38
0.12
Broadleaf
plants/
sm
insects
1.06
0.47
0.15
Fruits/
pods/
lg
insects
0.16
0.07
0.02
Dietary­
based
RQs
(
Dietary­
based
EEC/
LC50
or
NOAEC)
"
RQs"

Acute
Chronic
Short
Grass
#
DIV/
0!
0.34
Tall
Grass
#
DIV/
0!
0.15
Broadleaf
plants/
sm
Insects
#
DIV/
0!
0.18
Fruits/
pods/
lg
insects
#
DIV/
0!
0.03
Mammalian
Results
Mammalian
Body
%
body
wgt
Adjusted
Adjusted
Class
Weight
consumed
LD50
NOAEL
15
95
6022.06
98.90
Herbivores/
35
66
4872.49
80.02
insectivores
1000
15
2107.50
34.61
15
21
6022.06
98.90
Grainvores
35
15
4872.49
80.02
1000
3
2107.50
34.61
193
Dose­
based
EEC
(
mg/
kg­
bw)
Mammalian
Classes
and
Body
weight
Herbivores/
insectivores
Granivores
15
g
35
g
1000
g
15
g
35
g
1000
g
Short
Grass
226.10
157.08
35.70
Tall
Grass
95.76
66.53
15.12
Broadleaf
plants/
sm
Insects
119.70
83.16
18.90
Fruits/
pods/
seeds/
lg
insects
18.62
12.94
2.94
4.12
2.94
0.59
Dose­
based
RQs
(
Dose­
based
EEC/
LD50
or
NOAEL)
15
g
mammal
35
g
mammal
1000
g
mammal
Acute
Chronic
Acute
Chronic
Acute
Chronic
Short
Grass
0.04
2.29
0.03
1.96
0.02
1.03
Tall
Grass
0.02
0.97
0.01
0.83
0.01
0.44
Broadleaf
plants/
sm
insects
0.02
1.21
0.02
1.04
0.01
0.55
Fruits/
pods/
lg
insects
0.00
0.19
0.00
0.16
0.00
0.08
Seeds
(
granivore)
0.00
0.04
0.00
0.04
0.00
0.02
Dietary­
based
"
RQs"
(
EEC/
LC50
or
NOAEC)
Mammal
"
RQs"

Acute
Chronic
Short
Grass
#
DIV/
0!
0.26
Tall
Grass
#
DIV/
0!
0.11
Broadleaf
plants/
sm
insects
#
DIV/
0!
0.14
Fruits/
pods/
seeds/
lg
insects
#
DIV/
0!
0.02
194
Appendix
D:
TerrPlant
Model
and
Results
195
Terrestrial
Plant
EECs
and
Acute
Non
Listed
RQs
(
8/
8/
01;
version
1.0))
Chemical:
Dicamba
sugarcane
Input
Values
Application
Rate
(
lb
a.
e./
acre)
2.8
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,

or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=
Sheet
Runoff
+
Drift)
Total
Loading
to
Semiaquatic
Areas
(
EEC
=
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)

(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Emergence
RQs,

Semi­
aquatic
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Drift
RQs
RQ
=
Drift
EEC/
Vegetative
Vigor
EC25
Emergence
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.1680
1.4280
0.0280
3.96
62.22
33.68
528.89
0.19
4.12
Seed
Emerg
Monocot
EC25
(
lb
a.
e./
acre)
0.0424
Seed
Emerg
Dicot
EC25
(
lb
a.
e./
acre)
0.0027
Aerial,

Airblast,
Spray
Chemigation
0.2240
0.9800
0.1400
5.28
82.96
23.11
362.96
0.93
20.59
Veg
Vigor
Monocot
EC25
(
lb
a.
e./
acre)
0.1507
Veg
Vigor
Dicot
EC25
(
lb
a.
e./
acre)
0.0068
196
Terrestrial
Plant
EECs
and
Acute
Listed
RQs
(
8/
8/
01;
version
1.0)
Chemical:
Dicamba
sugarcane
Input
Values
Application
Rate
(
lb
a.
e./
acre)
2.8
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,
or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=

Sheet
Runoff
+
Drift)
Total
Loading
to
Semi­
aquatic
Areas
(
EEC
=

(
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)
(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC05
or
NOAEC
Emergence
RQs,

Semiaquatic
areas
RQ
=
EEC/
Seedling
Emergence
EC05
or
NOAEC
Drift
RQs
RQ
=

EEC/
Vegetative
Vigor
EC05
or
NOAEC
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.1680
1.4280
0.0280
5.25
76.36
44.63
649.09
0.22
7.00
Seed
Emerg
Monocot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.032
Seed
Emerg
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.0022
Aerial,

Airblast,
Spray
Chemigation
0.2240
0.9800
0.1400
7.00
101.82
30.63
445.45
1.08
35.00
Veg
Vigor
Monocot
EC05
or
NOAEC
(
lbs
a.
e./
acre)
0.13
Veg
Vigor
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.004
197
Terrestrial
Plant
EECs
and
Acute
Non
Listed
RQs
(
8/
8/
01;
version
1.0))
Chemical:
Dicamba
pasture,
soybean,
turf
Input
Values
Application
Rate
(
lb
a.
e./
acre)
2
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,

or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=
Sheet
Runoff
+
Drift)
Total
Loading
to
Semiaquatic
Areas
(
EEC
=
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)

(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Emergence
RQs,

Semi­
aquatic
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Drift
RQs
RQ
=
Drift
EEC/
Vegetative
Vigor
EC25
Emergence
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.1200
1.0200
0.0200
2.83
44.44
24.06
377.78
0.13
2.94
Seed
Emerg
Monocot
EC25
(
lb
a.
e./
acre)
0.0424
Seed
Emerg
Dicot
EC25
(
lb
a.
e./
acre)
0.0027
Aerial,

Airblast,
Spray
Chemigation
0.1600
0.7000
0.1000
3.77
59.26
16.51
259.26
0.66
14.71
Veg
Vigor
Monocot
EC25
(
lb
a.
e./
acre)
0.1507
Veg
Vigor
Dicot
EC25
(
lb
a.
e./
acre)
0.0068
198
Terrestrial
Plant
EECs
and
Acute
Listed
RQs
(
8/
8/
01;
version
1.0)
Dicamba
pasture,
soybean,
turf
Input
Values
Application
Rate
(
lb
a.
e./
acre)
2
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,
or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=
Sheet
Runoff
+

Drift)
Total
Loading
to
Semi­
aquatic
Areas
(
EEC
=

(
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)
(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC05
or
NOAEC
Emergence
RQs,

Semiaquatic
areas
RQ
=
EEC/
Seedling
Emergence
EC05
or
NOAEC
Drift
RQs
RQ
=

EEC/
Vegetative
Vigor
EC05
or
NOAEC
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.1200
1.0200
0.0200
3.75
54.55
31.88
463.64
0.15
5.00
Seed
Emerg
Monocot
EC05
or
NOAEC
(
lb
a.
i./
acre)
0.032
Seed
Emerg
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.0022
Aerial,

Airblast,
Spray
Chemigation
0.1600
0.7000
0.1000
5.00
72.73
21.88
318.18
0.77
25.00
Veg
Vigor
Monocot
EC05
or
NOAEC
(
lbs
a.
e./
acre)
0.13
Veg
Vigor
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.004
199
Terrestrial
Plant
EECs
and
Acute
Non
Listed
RQs
(
8/
8/
01;
version
1.0))
Chemical:
wheat
Input
Values
Application
Rate
(
lb
a.
e./
acre)
1
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,

or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=
Sheet
Runoff
+
Drift)
Total
Loading
to
Semiaquatic
Areas
(
EEC
=
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)

(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Emergence
RQs,

Semi­
aquatic
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Drift
RQs
RQ
=
Drift
EEC/
Vegetative
Vigor
EC25
Emergence
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.0600
0.5100
0.0100
1.42
22.22
12.03
188.89
0.07
1.47
Seed
Emerg
Monocot
EC25
(
lb
a.
e./
acre)
0.0424
Seed
Emerg
Dicot
EC25
(
lb
a.
e./
acre)
0.0027
Aerial,

Airblast,
Spray
Chemigatio
n
0.0800
0.3500
0.0500
1.89
29.63
8.25
129.63
0.33
7.35
Veg
Vigor
Monocot
EC25
(
lb
a.
e./
acre)
0.1507
Veg
Vigor
Dicot
EC25
(
lb
a.
e./
acre)
0.0068
200
Terrestrial
Plant
EECs
and
Acute
Listed
RQs
(
8/
8/
01;
version
1.0)
Dicamba
wheat
Input
Values
Application
Rate
(
lb
a.
e./
acre)
1
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,
or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=

Sheet
Runoff
+
Drift)
Total
Loading
to
Semi­
aquatic
Areas
(
EEC
=

(
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)
(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC05
or
NOAEC
Emergence
RQs,

Semiaquatic
areas
RQ
=
EEC/
Seedling
Emergence
EC05
or
NOAEC
Drift
RQs
RQ
=

EEC/
Vegetative
Vigor
EC05
or
NOAEC
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.0600
0.5100
0.0100
1.88
27.27
15.94
231.82
0.08
2.50
Seed
Emerg
Monocot
EC05
or
NOAEC
(
lb
a.
i./
acre)
0.032
Seed
Emerg
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.0022
Aerial,

Airblast,
Spray
Chemigation
0.0800
0.3500
0.0500
2.50
36.36
10.94
159.09
0.38
12.50
Veg
Vigor
Monocot
EC05
or
NOAEC
(
lbs
a.
e./
acre)
0.13
Veg
Vigor
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.004
201
Terrestrial
Plant
EECs
and
Acute
Non
Listed
RQs
(
8/
8/
01;
version
1.0)
Chemical:
Dicamba
corn
Input
Values
Application
Rate
(
lb
a.
e./
acre)
0.75
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,

or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=
Sheet
Runoff
+
Drift)
Total
Loading
to
Semiaquatic
Areas
(
EEC
=
Channelized
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)

(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Emergence
RQs,

Semi­
aquatic
Areas
RQ
=

EEC/
Seedling
Emergence
EC25
Drift
RQs
RQ
=
Drift
EEC/
Vegetative
Vigor
EC25
Emergence
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.0450
0.3825
0.0075
1.06
16.67
9.02
141.67
0.05
1.10
Seed
Emerg
Monocot
EC25
(
lb
a.
e./
acre)
0.0424
Seed
Emerg
Dicot
EC25
(
lb
a.
e./
acre)
0.0027
Aerial,

Airblast,
Spray
Chemigatio
n
0.0600
0.2625
0.0375
1.42
22.22
6.19
97.22
0.25
5.51
Veg
Vigor
Monocot
EC25
(
lb
a.
e./
acre)
0.1507
Veg
Vigor
Dicot
EC25
(
lb
a.
e./
acre)
0.0068
202
Terrestrial
Plant
EECs
and
Acute
Listed
RQs
(
8/
8/
01;
version
1.0)
Chemical:
Dicamba
corn
Input
Values
Application
Rate
(
lb
a.
e./
acre)
0.75
Estimated
Environmental
Concentrations
(
EECs)
for
NON­
GRANULAR
formulation
applications
(
lbs
a.
e./
acre)
Risk
Quotients
(
RQs)
for
NON­
GRANULAR
formulation
applications
Runoff
Value
(
0.01,
0.02,
or
0.05
if
chemical
solubility
<
10,

10­
100,
or
>
100
ppm,
respectively)
0.05
Application
Method
Total
Loading
to
Adjacent
Areas
(
EEC
=

Sheet
Runoff
+
Drift)
Total
Loading
to
Semiaquatic
Areas
(
EEC
=

(
Channelize
d
Runoff
+

Drift)
DRIFT
EEC
(
for
ground:

application
rate
x
0.01)
(
for
aerial:
application
rate
x
0.05)
Emergence
RQs,

Adjacent
Areas
RQ
=

EEC/
Seedling
Emergence
EC05
or
NOAEC
Emergence
RQs,

Semiaquatic
areas
RQ
=
EEC/
Seedling
Emergence
EC05
or
NOAEC
Drift
RQs
RQ
=

EEC/
Vegetative
Vigor
EC05
or
NOAEC
Minimum
Incorporation
Depth
(
inches)
0
Monocot
Dicot
Monocot
Dicot
Monocot
Dicot
Ground
Unincorp.
0.0450
0.3825
0.0075
1.41
20.45
11.95
173.86
0.06
1.88
Seed
Emerg
Monocot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.032
Seed
Emerg
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.0022
Aerial,

Airblast,
Spray
Chemigation
0.0600
0.2625
0.0375
1.88
27.27
8.20
119.32
0.29
9.38
Veg
Vigor
Monocot
EC05
or
NOAEC
(
lbs
a.
e./
acre)
0.13
Veg
Vigor
Dicot
EC05
or
NOAEC
(
lb
a.
e./
acre)
0.004
203
Appendix
E:
Data
Requirements
TABLE
of
Environmental
Fate
Data
Requirements
Guideli
ne
#
Data
Requirement
MRID
#
(
test
substance)
Study
Classification
Is
more
data
needed?

161­
1
Hydrolysis
40335501
(
dicamba
acid)
Acceptable
no
161­
2
Photodegradation
in
Water
42774102
(
dicamba
acid)
Acceptable
no
161­
3
Photodegradation
on
Soil
42774103
(
dicamba
acid)
Acceptable
no
161­
4
Photodegradation
in
Air
No
study
submitted
no
162­
1
Aerobic
Soil
Metabolism
43245207
(
dicamba
aicd)
Acceptable
no
162­
2
Anaerobic
Soil
Metabolism
43245208
(
dicamba
acid)
Acceptable
no
162­
3
Anaerobic
Aquatic
Metabolism
43245208
(
dicamba
acid)
Acceptable
no
162­
4
Aerobic
Aquatic
Metabolism
43758509
(
dicamba
acid)
Supplementa
l
no
163­
1
Leaching­
Adsorption/
Desorptio
n
42774101
(
dicamba
acid)
43095301
(
dicamba
acid)
Acceptable
Supplementa
l
no
163­
2
Laboratory
Volatility
41966602
(
K
and
DMA
salts)
Acceptable
no
163­
3
Field
Volatility
No
study
submitted
164­
1
Terrestrial
Field
Dissipation
43361506
(
Na
and
DGA
salts)
43361507
(
DGA
salt)
43651405
(
DMA
salt)
43651407
(
DGA
salt)
43651408
(
Na
salt)
42754101
(
K
salt
)
42754102
(
K
salt)
Supplementa
l
Supplementa
l
Supplementa
l
Supplementa
l
Supplementa
l
Supplementa
l
Supplementa
l
no
164­
2
Aquatic
Field
Dissipation
No
study
submitted
TABLE
of
Environmental
Fate
Data
Requirements
Guideli
ne
#
Data
Requirement
MRID
#
(
test
substance)
Study
Classification
Is
more
data
needed?

204
164­
3
Forestry
Dissipation
No
study
submitted
165­
4
Accumulation
in
Fish
N/
A
waived
165­
5
Accumulationaquatic
non­
target
No
study
submitted
166­
1
Ground
Water­
small
prospective
No
study
submitted
166­
2
Groundwater
­
small
retrospective
No
study
submitted
201­
1
Droplet
Size
Spectrum
No
study
submitted
202­
1
Drift
Field
Evaluation
No
study
submitted
TABLE
of
Ecological
Toxicity
Data
Requirements
Guideline
#
Data
Requirement
MRID
#
Classification
Is
more
data
needed?

71­
1
Avian
acute
oral
LD50
Dicamba
acid
(
bobwhite
quail)
(
mallard
duck)

Dimethylamine
salt
of
dicamba
(
mallard
duck)
(
mallard
duck)

Potassium
salt
of
dicamba
(
bobwhite
quail)

Diglycoamine
salt
of
dicamba
(
bobwhite
quail)
42774105
42774106
00046180
00073275
261466
ACC26386
3
Acceptable
Acceptable
Supplemental
Supplemental
Supplemental
Acceptable
No
note:
MRID
nos.
00046180,
00073275,
and
261466
are
classified
as
Supplemental
because
testing
was
done
with
a
formulation
rather
than
the
technical
grade
of
the
active
ingredient
Guideline
#
Data
Requirement
MRID
#
Classification
Is
more
data
needed?

205
71­
2
Avian
subacute
dietary
LC50
Dicamba
acid
(
bobwhite
quail)
(
bobwhite
quail)
(
mallard
duck)
(
mallard
duck)
(
mallard
duck)

Dimethylamine
salt
of
dicamba
(
bobwhite
quail)
(
bobwhite
quail)
(
mallard
duck)
(
mallard
duck)

Sodium
salt
of
dicamba
(
bobwhite
quail)
(
bobwhite
quail)
(
mallard
duck)

Potassium
salt
of
dicamba
(
bobwhite
quail)
(
mallard
duck)

Diglycoamine
salt
of
dicamba
(
bobwhite
quail)
(
mallard
duck)
0025391
0023690
TOUDIC07
0025392
0025317
00046182
00034693
00046181
00022527
00233292
0025328
00030102
261465
261466
ACC263863
ACC263863
Acceptable
Supplemental
Acceptable
Supplemental
Supplemental
Supplemental
Supplemental
Supplemental
Supplemental
Acceptable
Supplemental
Supplemental
Supplemental
Supplemental
Acceptable
Acceptable
No
note:
MRID
nos.
0023690,
0025392,
0025317,
00046182,
00034693,
00046181,
00022527,
0025328
00030102,
261465,
and
261466
are
classified
as
Supplemental
because
testing
was
done
with
a
formulation
rather
than
the
technical
grade
of
the
active
ingredient
71­
4
Avian
reproduction
Dicamba
acid
(
bobwhite
quail)
(
mallard
duck)
43814004
43814003
Acceptable
Acceptable
No
Guideline
#
Data
Requirement
MRID
#
Classification
Is
more
data
needed?

206
72­
1
Freshwater
fish
acute
LC50
Dicamba
acid
(
rainbow
trout)
(
rainbow
trout)
(
rainbow
trout)
(
bluegill)
(
bluegill)

Dimethylamine
salt
of
dicamba
(
rainbow
trout)
(
rainbow
trout)
(
bluegill)
(
bluegill)

Sodium
salt
of
dicamba
(
rainbow
trout)
(
bluegill)

Potassium
salt
of
dicamba
(
bluegill)

Diglycoamine
salt
of
dicamba
(
rainbow
trout)
(
bluegill)
0041272
4009001
00036915
0034703
40098001
263000
00046184
00046183
00022530
00029623
00022539
258983
ACC26386
3
ACC26386
3
Acceptable
Acceptable
Supplemental
Acceptable
Supplemental
Acceptable
Supplemental
Supplemental
Supplemental
Supplemental
Supplemental
Supplemental
Acceptable
Acceptable
No
note:
MRID
nos.
00036915,
00046184,
00046183,
00022530,
00029623,
00022539,
and
258983
are
classified
as
Supplemental
because
testing
was
done
with
a
formulation
rather
than
the
technical
grade
of
the
active
ingredient;
MRID
no.
00046184
is
classified
as
Supplemental
because
an
LC50
was
not
established
nor
shown
to
exceed
100
ppm
72­
2
Freshwater
invertebrate
acute
EC50
Dicamba
acid
(
daphnia)

(
sowbug)
(
scud)

Dimethylamine
salt
of
dicamba
(
daphnia)

Sodium
salt
of
dicamba
(
daphnia)

Potassium
salt
of
dicamba
(
daphnia)

Diglycoamine
salt
of
dicamba
(
daphnia)
0052126
40094602
40098001
40098001
00028283
00233292
258983
ACC26386
3
Acceptable
Supplemental
Supplemental
Supplemental
Supplemental
Acceptable
Supplemental
Supplemental
No
Guideline
#
Data
Requirement
MRID
#
Classification
Is
more
data
needed?

207
note:
MRID
nos.
40098001,
40098001,
00028283,
00233292,
258983,
and
ACC263863
are
classified
as
Supplemental
because
testing
was
done
with
a
formulation
rather
than
the
technical
grade
of
the
active
ingredient
72­
3a
Estuarine/
marine
fish
acute
LC50
Dicamba
acid
(
sheepshead
minnow)
0025390
Acceptable
No
72­
3b
Estuarine/
marine
invertebrate
acute
EC50
Dicamba
acid
(
grass
shrimp)
(
fiddler
crab)
(
glass
shrimp)
(
eastern
oyster)
0034702
0034704
40098001
40228401
Acceptable
Acceptable
Supplemental
Supplemental
No
note:
MRID
no.
40098001
is
classified
as
Supplemental
because
the
test
species
is
not
a
guideline
test
species;
MRID
no.
40228401
is
classified
as
Supplemental
because
an
EC50
was
not
established
nor
shown
to
exceed
100
ppm
72­
4a
Freshwater
fish
early
life
stage
(
rainbow
trout
or
fathead
minnow)
N/
A
No
72­
4b
Freshwater
invertebrate
life
cycle
(
daphnia)
N/
A
No
72­
4c
Estuarine/
marine
life
cycle
(
mysid)
N/
A
No
72­
5
Freshwater
fish
life
cycle
(
fathead
minnow)
N/
A
No
72­
7
Aquatic
Field
Study
N/
A
No
81­
1
Mammalian
acute
oral
LD50
Dicamba
acid
(
rat)
00078444
Acceptable
No
82­
1
Mammalian
subchronic
feeding
Dicamba
acid
(
rat)
00128093
Acceptable
No
83­
3
Mammalian
Developmental
Dicamba
acid
(
rat)
(
rabbit)
00084024
42429401
Acceptable
Acceptable
No
83­
4
Mammalian
Reproduction
Dicamba
acid
(
rat)
43137101
Acceptable
No
Guideline
#
Data
Requirement
MRID
#
Classification
Is
more
data
needed?

208
122­
2
Aquatic
plant
(
algae)
Dicamba
acid
Selenastrum
capricornutum
Skeletonema
costatum
Anabaena
flos­
aquae
Navicula
pelliculosa
42774107
42774110
42774109
42774108
Acceptable
Acceptable
Acceptable
Acceptable
No
123­
1(
a)
Seedling
Emergence
­
Tier
II
Dicamba
acid
(
TGAI)
Dicamba
acid
(
TEP)
Dimethylamine
salt
(
TEP)
Diglycoamine
salt
(
TEP)
Isopropylamine
salt
(
TEP)
Sodium
salt
(
TEP)
Potassium
salt
(
TEP)
42846301
Supplemental
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
note:
MRID
no.
42846301
is
Supplemental
because
an
NOAEC
was
not
determined
for
the
most
sensitive
endpoint;
Seedling
Emergence
studies
are
required
for
all
forms
of
dicamba
and
its
salts;
each
test
can
be
limited
to
the
five
most
sensitive
species
determined
in
MRID
no.
42846301
(
soybean,
onion,
turnip,
tomato,
and
lettuce)

123­
1(
b)
Vegetative
Vigor
­
Tier
II
Dicamba
acid
(
TGAI)
Dicamba
acid
(
TEP)
Dimethylamine
salt
(
TEP)
Diglycoamine
salt
(
TEP)
Isopropylamine
salt
(
TEP)
Sodium
salt
(
TEP)
Potassium
salt
(
TEP)
42846301
Supplemental
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
note:
MRID
no.
42846301
is
Supplemental
because
an
NOAEC
was
not
determined
for
the
most
sensitive
endpoint;
Vegetative
Vigor
studies
are
required
for
all
forms
of
dicamba
and
its
salts;
each
test
can
be
limited
to
the
five
most
sensitive
species
determined
in
MRID
no.
42846301
(
soybean,
onion,
turnip,
tomato,
and
lettuce)

123­
2
Aquatic
plant
acute
EC50
Dicamba
acid
Lemna
gibba
42774111
Acceptable
No
141­
1
Acute
honey
bee
contact
LD50
00036935
Acceptable
No
141­
2
Honey
Bee
Residue
on
Foliage
No
141­
5
Honey
Bee
Field
Testing
for
Pollinators
No
209
Appendix
F:
Ecological
Effects
Summaries
71­
1
Avian
Acute
Oral
Dicamba
acid
Bobwhite
Quail.
MRID
42774105
(
Acceptable).
In
a
14­
day
oral
gavage
study,
dicamba
acid
was
determined
to
be
moderately
toxic
to
bobwhite
quail
with
an
LD
50
of
188
mg
ae/
kg.
The
NOEL
was
determined
to
be
13.6
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Mallard
Duck.
MRID
42774106
(
Acceptable).
In
a
14­
day
oral
gavage
study,
dicamba
acid
was
determined
to
be
slightly
toxic
to
mallard
ducks
with
an
LD
50
of
1373
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Dimethylamine
salt
of
dicamba
Mallard
Duck.
MRID
0046180
(
Supplemental).
In
an
14­
day
oral
gavage
study,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
>
2452
ppm
ae.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Mallard
Duck.
MRID
0073275
(
Supplemental).
In
an
14­
day
oral
gavage
study,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducklings
with
an
LC
50
>
2452
ppm
ae.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Potassium
salt
of
Dicamba
Bobwhite
Quail.
MRID
261466
(
Supplemental).
In
a
14­
day
oral
gavage
study,
potassium
salt
of
dicamba
was
determined
to
be
moderately
toxic
to
bobwhite
quail
with
an
LD
50
of
618
mg
ae/
kg.
The
NOEL
was
determined
to
be
<
67
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Diglycoamine
salt
of
dicamba
Bobwhite
Quail.
MRID
ACC263863
(
Acceptable).
In
a
14­
day
oral
gavage
study,
diglycoamine
salt
of
dicamba
was
determined
to
be
moderately
toxic
to
bobwhite
quail
with
an
LD
50
of
262
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

71­
2
Avian
Subacute
Dietary
Dicamba
acid
Bobwhite
Quail.
MRID
0025391
(
Acceptable).
In
a
8­
day
dietary
study,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
>
10000
mg
ae/
kg.
The
NOEL
was
determined
to
be
1000
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Bobwhite
Quail.
MRID
0023690
(
Supplemental).
In
a
8­
day
dietary
study,
dicamba
acid
was
210
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
>
10000
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Mallard
Duck.
MRID
TOUDIC07
(
Acceptable).
In
a
8­
day
dietary
study,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
>
10000
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Mallard
Duck.
MRID
0025392
(
Supplemental).
In
a
8­
day
dietary
study,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LD
50
of
2009
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Mallard
Duck.
MRID
0025317
(
Supplemental).
In
a
8­
day
dietary
study,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
>
10000
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Dimethylamine
salt
of
dicamba
Bobwhite
Quail.
MRID
0046182
(
Supplemental).
In
a
8­
day
dietary
study,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
>
5490
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Bobwhite
Quail.
MRID
0034693
(
Supplemental).
In
a
8­
day
dietary
study,
dimethylamine
salt
of
dicamba
was
determined
to
be
slightly
toxic
to
bobwhite
quail
with
an
LC
50
of
>
4533
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Mallard
Duck.
MRID
0046181
(
Supplemental).
In
a
8­
day
dietary
study,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
>
5490
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Mallard
Duck.
MRID
0022527
(
Supplemental).
In
a
8­
day
dietary
study,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
>
4533
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Sodium
salt
of
dicamba
Bobwhite
Quail.
MRID
233292
(
Acceptable).
In
a
8­
day
dietary
study,
sodium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
>
9090
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Bobwhite
Quail.
MRID
0025328
(
Supplemental).
In
a
8­
day
dietary
study,
sodium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
>
9090
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.
211
Mallard
Duck.
MRID
00030102
(
Supplemental).
In
a
8­
day
dietary
study,
sodium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
>
9090
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Potassium
salt
of
dicamba
Mallard
Duck.
MRID
00261466
(
Supplemental).
In
a
8­
day
dietary
study,
potassium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
4794
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Bobwhite
Quail.
MRID
00261465
(
Supplemental).
In
a
8­
day
dietary
study,
potassium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
4794
mg
ae/
kg.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Diglycoamine
salt
of
dicamba
Bobwhite
Quail.
MRID
ACC263863
(
Acceptable).
In
a
8­
day
dietary
study,
diglycoamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bobwhite
quail
with
an
LC
50
of
>
1522
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Mallard
Duck.
MRID
ACC263863
(
Acceptable).
In
a
8­
day
dietary
study,
diglycoamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
mallard
ducks
with
an
LC
50
of
>
1522
mg
ae/
kg.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

71­
4
Avian
Reproduction
Dicamba
acid
Bobwhite
Quail.
MRID
43814004
(
Acceptable).
In
a
one­
generation
reproductive
toxicity
study,
dicamba
acid
produced
no
evidence
of
treatment­
related
adverse
effects
on
adult
or
reproductive
parameters
with
an
NOEC
of
>
1390
ppm.
The
study
is
scientifically
sound
and
generally
followed
guideline
protocols.

Mallard
Duck.
MRID
43814003
(
Acceptable).
In
a
one­
generation
reproductive
toxicity
study,
dicamba
acid
produced
reduction
in
hatchability
with
an
LOEC
of
1390
ppm
ae
(
NOEC
695
ppm
ae).
The
study
is
scientifically
sound
and
followed
guideline
protocols.

72­
1
Freshwater
Fish
Acute
Dicamba
acid
Rainbow
Trout.
MRID
0041272
(
Acceptable).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
rainbow
trout
with
an
LC
50
of
135.4
mg/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Rainbow
Trout.
MRID
40098001
(
Acceptable).
In
a
96­
hour
acute
test,
dicamba
acid
was
212
determined
to
be
slightly
toxic
to
rainbow
trout
with
an
LC
50
of
28
mg/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols
Rainbow
Trout.
MRID
0036915
(
Supplemental).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
rainbow
trout
with
an
LC
50
of
153
mg/
L.
The
NOEL
was
determined
to
be
49
mg/
L.
The
study
is
scientifically
sound
and
follows
the
guideline
protocols.

Bluegill
Sunfish.
MRID
0034703
(
Acceptable).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
bluegill
sunfish
with
an
LC
50
of
135.3
mg/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Bluegill
Sunfish.
MRID
40098001
(
Supplemental).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
slightly
toxic
to
bluegill
sunfish
with
an
LC
50
of
>
50
mg/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Dimethylamine
salt
of
dicamba
Rainbow
Trout.
MRID
00263000
(
Acceptable).
In
a
96­
hour
acute
test,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
rainbow
trout
with
an
LC
50
of
>
977
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Rainbow
Trout.
MRID
0046184
(
Supplemental).
In
a
96­
hour
acute
test,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
rainbow
trout
with
an
LC
50
of
>
977
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Bluegill
Sunfish.
MRID
0046183
(
Supplemental).
In
a
96­
hour
acute
test,
dimethylamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bluegill
sunfish
with
an
LC
50
of
>
977
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Bluegill
Sunfish.
MRID
0022530
(
Supplemental).
In
a
96­
hour
acute
test,
dimethylamine
salt
of
dicamba
acid
determined
to
be
practically
non­
toxic
to
bluegill
sunfish
with
an
LC
50
of
>
977
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Sodium
salt
of
dicamba
Rainbow
Trout.
MRID
0029623
(
Supplemental).
In
a
96­
hour
acute
test,
sodium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
rainbow
trout
with
an
LC
50
of
507
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Bluegill
Sunfish.
MRID
0022539
(
Acceptable).
In
a
96­
hour
acute
test,
sodium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bluegill
sunfish
with
an
LC
50
of
642
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.
213
Potassium
salt
of
dicamba
Bluegill
Sunfish.
MRID
258983
(
Supplemental).
In
a
96­
hour
acute
test,
potassium
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bluegill
sunfish
with
an
LC
50
of
196
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Diglycoamine
salt
of
dicamba
Rainbow
Trout.
MRID
ACC263863
(
Acceptable).
In
a
96­
hour
acute
test,
diglycoamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
rainbow
trout
with
an
LC
50
of
>
270.8
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Bluegill
Sunfish.
MRID
ACC263863
(
Acceptable).
In
a
96­
hour
acute
test,
diglycoamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
bluegill
sunfish
with
an
LC
50
of
>
270.8
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

72­
2
Freshwater
Invertebrate
Acute
Dicamba
acid
Daphnia.
MRID
0052126
(
Acceptable).
In
a
48­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
daphnids
with
an
EC
50
of
110.7
mg/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Daphnia.
MRID
40094602
(
Supplemental).
In
a
48­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
daphnids
with
an
EC
50
of
>
100
mg/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Sowbug.
MRID
40098001
(
Supplemental).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
sowbug
with
an
LC
50
of
>
100
mg/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Scud.
MRID
40098001
(
Supplemental).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
scuds
with
an
LC
50
of
>
100
mg/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Dimethylamine
salt
of
dicamba
Daphnia.
MRID
0028283
(
Supplemental).
In
a
48­
hour
acute
test,
dicamba
(
DMA)
was
determined
to
be
practically
non­
toxic
to
daphnids
with
an
EC
50
of
1563
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Sodium
salt
of
dicamba
Daphnia.
MRID
00233292
(
Acceptable).
In
a
48­
hour
acute
test,
sodium
salt
of
dicamba
was
determined
to
be
slightly
toxic
to
water
fleas
with
an
EC
50
of
34.6
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.
214
Potassium
salt
of
dicamba
Daphnia.
MRID
258983
(
Supplemental).
In
a
48­
hour
acute
test,
potassium
salt
of
dicamba
was
determined
to
be
slightly
toxic
to
water
fleas
with
an
EC
50
of
639.8
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

Diglycoamine
salt
of
dicamba
Daphnia.
MRID
ACC263863
(
Supplemental).
In
a
48­
hour
acute
test,
diglycoamine
salt
of
dicamba
was
determined
to
be
practically
non­
toxic
to
water
fleas
with
an
EC
50
of
>
270.8
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

72­
3a
Estuarine/
Marine
Fish
Acute
Dicamba
acid
Sheepshead
Minnow.
MRID
0025390
(
Acceptable).
In
a
96­
hour
flow­
through
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
sheepshead
minnow
with
an
LC
50
of
>
180
mg
ae/
L.
The
NOEL
was
determined
to
be
100
mg
ai/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

72­
3b
Estuarine/
Marine
Invertebrate
Acute
Dicamba
acid
Grass
Shrimp.
MRID
0034702
(
Acceptable).
In
a
96­
hour
flow­
through
test,
Dicamba
acid
was
determined
to
be
practically
non­
toxic
to
grass
shrimp
with
an
LC
50
of
>
132
mg
ae/
L.
The
NOEL
was
determined
to
be
56
mg
ai/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Fiddler
Crab.
MRID
0034704
(
Acceptable).
In
a
96­
hour
flow­
through
test,
dicamba
acid
was
determined
to
be
practically
non­
toxic
to
fiddler
crabs
with
an
LC
50
of
>
173
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Glass
Shrimp.
MRID
40098001
(
Supplemental).
In
a
96­
hour
acute
test,
dicamba
acid
was
determined
to
be
slightly
toxic
to
glass
shrimp
with
an
LC
50
of
>
56
mg/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Eastern
Oyster.
MRID
40228401
(
Supplemental).
In
a
48­
hour
acute
test,
dicamba
acid
was
determined
to
be
moderately
toxic
to
the
eastern
oyster
with
an
EC
50
of
>
1.0
mg
ae/
L.
The
study
is
scientifically
sound;
however,
some
guideline
protocols
were
not
adequately
followed.

72­
4a
Freshwater
Fish
Early
Life
Stage
No
studies
available
215
72­
4b
Freshwater
Invertebrate
Life
Cycle
No
studies
available
72­
5
Freshwater
Fish
Life
Cycle
No
studies
available
81­
1
Acute
Mammalian
Oral
Dicamba
acid
Rat.
MRID
00078444
(
Acceptable).
In
an
acute
oral
study,
dicamba
acid
was
determined
to
have
a
low
toxicity
(
Toxicity
Category
III)
to
rats
with
an
LD
50
2740
mg/
kg/
day.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

81­
2
Mammalian
Subchronic
Feeding
Dicamba
acid
Rat.
MRID
00128093
(
Acceptable).
In
a
subchronic
feeding
study,
dicamba
acid
was
determined
to
have
a
low
toxicity
to
rats
with
NOEL/
LOAEL
of
500/
1000
mg
ai/
kg/
day.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

83­
3
Mammalian
Developmental
Dicamba
acid
Rat.
MRID
00084024
(
Acceptable).
In
a
developmental
study,
dicamba
acid
showed
maternal
toxicity
impacts
of
mortality,
clinical
signs
of
neurotoxicity,
decreased
body
weight
gain
and
food
consumption
to
rats
with
a
NOAEL
of
160
and
LOAEL
of
1000
mg
ai/
kg/
day.
The
study
found
no
treatment­
related
fetal
gross,
skeletal,
or
visceral
anomalies
associated
with
developmental
toxicity
with
a
NOAEL
>
400
mg
ai/
kg/
day.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

Rabbit.
MRID
42429401
(
Acceptable).
In
a
2­
generation
teratology
study,
dicamba
acid
produced
treatment­
related
effects
for
maternal
endpoints
of
abortion,
clinical
signs
of
toxicity,
decreased
body
weight
gain
and
food
consumption
with
a
NOAEL
of
30
and
LOAEL
of
150
mg
ai/
kg/
day.
Developmental
associated
impacts
included
irregular
ossification
of
internasal
bones
with
a
NOAEL
of
150
and
LOAEL
of
300
mg
ai/
kg/
day.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

83­
4
Mammalian
Reproduction
Dicamba
acid
Rat.
MRID
43137101
(
Acceptable).
In
a
developmental
study,
dicamba
acid
showed
systemic,
offspring,
and
developmental
endpoint
toxicity.
Systematic
toxicity
included
clinical
signs
of
216
neurotoxicity
in
dams
during
lactation
and
significantly
increased
relative
liver
to
body
weight
ratios
with
NOAELs
of
122
(
males)/
136
(
females)
and
LOAELs
of
419
(
males)
and
450
(
females)
mg
ai/
kg/
day.
Offspring
toxicity
included
significantly
decreased
pup
growth
with
a
NOAEL
of
45
and
LOAEL
of
136
mg
ai/
kg/
day.
Developmental
endpoints
effected
included
decreased
pup
growth
and
delayed
sexual
maturation
in
F1
males
with
a
NOAEL
of
45
and
a
LOAEL
of
136
my
ai/
kg/
day.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

122­
2
Aquatic
Plant
Nonvascular
Dicamba
acid
Green
algae.
MRID
42774107
(
Acceptable).
In
a
Tier
II
toxicity
test
with
Selenastrum
capricornutum,
the
5
day
EC
50
for
cell
density
was
>
3.7
ppm
ae
(
NOEC
=
3.7
mg
ae/
L).
The
study
is
scientifically
sound
and
meets
the
guideline
protocols.

Marine
diatom.
MRID
42774110
(
Acceptable).
In
a
Tier
II
toxicity
test
with
marine
diatoms
(
Skeletonema
costatum),
the5­
day
EC
50
for
cell
density
was
0.493
mg
ae/
L
(
NOEC
=
0.011
mg
ae/
L).
The
study
is
scientifically
sound
and
meets
the
guideline
protocols.

Blue­
green
algae.
MRID
42774109
(
Acceptable).
In
a
Tier
II
toxicity
test
with
Anabaena
flosaquae
the
5­
day
EC
50
for
cell
density
was
0.061
mg
ae/
L
(
NOEC
=
0.005
mg
ae/
L).
The
study
is
scientifically
sound
and
meets
the
guideline
protocols.

Freshwater
diatom.
MRID
42774108
(
Acceptable).
In
a
Tier
II
toxicity
test
with
freshwater
diatoms
the
EC
50
for
cell
density
was
2.3
mg
ae/
L
(
NOEC
=
0.5
mg
ae/
L).
The
study
is
scientifically
sound
and
meets
the
guideline
protocols.

123­
1(
a)
Seedling
Emergence
­
Tier
II
Dicamba
acid
Monocots
(
4
species)
and
Dicots
(
6
species).
MRID
42846301
(
Supplemental).
In
a
Tier
II
seedling
emergence
study,
the
most
sensitive
monocot
tested
was
onion
(
EC
25
0.004
lb
ae/
A,
NOEC
<
0.032
lb
ae/
A;
shoot
weight).
The
most
sensitive
dicot
tested
was
soybean
(
EC
25
0.0027
lb
ae/
A,
NOEC
<
0.0022
lb
ae/
A;
shoot
weight).
Due
to
deficiencies
in
the
study,
the
guideline
requirements
are
only
partially
fulfilled;
Acceptable
data
endpoints
were
used
in
the
risk
assessment..

123­
1(
b)
Vegetative
Vigor
­
Tier
II
Dicamba
acid
Monocots
(
4
species)
and
Dicots
(
6
species).
MRID42846301
(
Supplemental).
In
a
Tier
II
vegetative
vigor
study,
the
most
sensitive
monocot
tested
was
onion
(
EC
25
0.062
lb
ae/
A,
NOEC
<
0.13
lb
ae/
A;
root
weight).
The
most
sensitive
dicot
tested
was
soybean
(
EC
25
0.0065
lb
ae/
A,
NOEC
<
0.0040
lb
ae/
A;
shoot
height).
Due
to
deficiencies
in
the
study,
the
guideline
requirements
are
partially
fulfilled;
Acceptable
data
endpoints
were
used
in
the
risk
assessment.
217
123­
2
Aquatic
Plant
Vascular
Dicamba
acid
Duckweed.
MRID
42774111
(
Acceptable).
In
a
14­
day
Tier
II
Toxicity
Test
with
duckweed,
the
EC
50
for
frond
production
was
>
3.25
mg
ae/
L
and
the
NOEC
was
0.20
mg
ae/
L.
The
study
is
scientifically
sound
and
meets
guideline
protocols.

141­
5
Acute
Honey
Bee
Contact
Dicamba
acid
Honey
Bee.
MRID
00036935
(
Acceptable).
In
a
48­
hour
acute
contact
study
with
the
honey
bee,
Dicamba
acid
was
determined
to
be
practically
non­
toxic
to
honey
bees
and
the
LD
50
was
>
90.65
µ
g
ae/
bee.
The
study
is
scientifically
sound
and
meets
guideline
protocols.
