Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Date:
05/
20/
04
Assessor:
TD
Crops
Applicable
TC
Groups
Spreadsheet
Number
Cereal
Grains
Field
Row/
Low
Medium
C1
Corn,
Field
Field
Row/
Tall
C2
Corn,
Sweet
Field
Row/
Tall
C3
Potato
Vegetable/
Root
C4
Rice
Field
Row/
Low
Medium
C5
Sorghum
Field
Row/
Tall
C6
Sugarcane
Sugarcane
C7
Turf/
Sod
(
California
Conditions)
Turf
C8
Turf/
Sod
(
North
Carolina
Conditions)
Turf
C9
DFR/
TTR
Data
Defaults:

Initial
Percent
of
Rate
as
DFR
(%):
20
Dissipation
Rate
per
day
(%):
10
Toxicology
&
Exposure
Factor
Inputs:

Uncertainty
Factor:
100
NOAEL
(
mg/
kg/
day):
25
Source
of
NOAEL:
Rat
Developmental
Study
(
Oral)

Adult
Exposure
Duration
(
hrs/
day):
8
Adult
Body
Weight
(
kg):
60
Dermal
Abs.
(%):
5.8
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C1
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
low/
medium
Specific
Crop(
s)
Considered:
Cereal
Grains
Application
Rate
of
Crop
(
lb
ae/
A):
1.25
Application
Rate
Source:
Master
Label
Post
Emergence
Rate
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:

Slope
of
Semilog
Regression:

[
Initial]
(
ug/
cm2):

Study
Application
Rate
(
lb
ae/
A):
1.25
Limit
of
Quantification
(
ug/
cm2):

[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
100
TBD
Irrigation,
scouting,
thinning,
weeding
immature/
low
foliage
plants
Medium
1500
486
to
2760
Irrigation,
scouting,
weeding
mature/
high
foliage
plants
DAT
DFR
LEVELS
DOSE
MOES
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
Medium
Exposure
Low
Medium
0
2.805
2.805
0.0022
0.0325
11526
768
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C2
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
tall
Specific
Crop(
s)
Considered:
Field
Corn
Application
Rate
of
Crop
(
lb
ae/
A):
1.5
Application
Rate
Source:
Master
Label
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:
N/
A
Slope
of
Semilog
Regression:
N/
A
[
Initial]
(
ug/
cm2):
N/
A
Study
Application
Rate
(
lb
ae/
A):
1.5
Limit
of
Quantification
(
ug/
cm2):
N/
A
[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
100
TBD
scouting,
weeding
immature/
low
foliage
plants
Medium
400
418
to
1980
scouting,
weeding
more
mature/
foliaged
plants
High
1000
418
to
1980
scouting,
irrigation,
weeding
mature/
full
foliage
plants
DAT
DFR
LEVELS
DOSE
MOES
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
Med
Exposure
High
Exposure
Low
Medium
High
0
3.366
3.366
0.0026
0.0104
0.0260
9605
2401
961
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C3
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
tall
Specific
Crop(
s)
Considered:
Sweet
Corn
Application
Rate
of
Crop
(
lb
ae/
A):
0.5
Application
Rate
Source:
Master
Label
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:
N/
A
Slope
of
Semilog
Regression:
N/
A
[
Initial]
(
ug/
cm2):
N/
A
Study
Application
Rate
(
lb
ae/
A):
0.5
Limit
of
Quantification
(
ug/
cm2):
N/
A
[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
100
TBD
scouting,
weeding
immature/
low
foliage
plants
Medium
400
418
to
1980
scouting,
weeding
more
mature/
foliaged
plants
High
1000
418
to
1980
Does
not
Apply
Very
High
17000
6748
to
25254
Does
not
apply
DAT
DFR
LEVELS
DOSE
MOES
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
Med
Exposure
Low
Medium
0
1.122
1.122
0.0009
0.0035
28815
7204
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C4
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Root
Vegetables
Specific
Crop(
s)
Considered:
potatoes
Application
Rate
of
Crop
(
lb
ae/
A):
0.07
Application
Rate
Source:
Master
Label
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:
N/
A
Slope
of
Semilog
Regression:
N/
A
[
Initial]
(
ug/
cm2):
N/
A
Study
Application
Rate
(
lb
ae/
A):
0.07
Limit
of
Quantification
(
ug/
cm2):
N/
A
[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
300
140
to
290
Irrigation,
scouting,
thinning,
weeding
immature
plants
Medium
1500
486
to
2760
Irrigation
and
scouting
mature
plants
Very
High
N/
A
N/
A
N/
A
DAT
DFR
LEVELS
DOSE
MOES
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
Medium
Exposure
Low
Medium
0
0.157
0.157
0.0004
0.0018
68608
13722
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C5
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
low/
medium
Specific
Crop(
s)
Considered:
Rice
Application
Rate
of
Crop
(
lb
ae/
A):
1.5
Application
Rate
Source:
Master
Label
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:

Slope
of
Semilog
Regression:

[
Initial]
(
ug/
cm2):

Study
Application
Rate
(
lb
ae/
A):
1.5
Limit
of
Quantification
(
ug/
cm2):

[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
100
TBD
Irrigation,
scouting,
thinning,
weeding
immature/
low
foliage
plants
Medium
1500
486
to
2760
Irrigation,
scouting,
weeding
mature/
high
foliage
plants
DAT
DFR
LEVELS
DOSE
MOES
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
Medium
Exposure
Low
Medium
0
3.366
3.366
0.0026
0.0390
9605
640
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C6
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
tall
Specific
Crop(
s)
Considered:
Sorghum
Application
Rate
of
Crop
(
lb
ae/
A):
1
Application
Rate
Source:
Master
Label
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:
N/
A
Slope
of
Semilog
Regression:
N/
A
[
Initial]
(
ug/
cm2):
N/
A
Study
Application
Rate
(
lb
ae/
A):
1
Limit
of
Quantification
(
ug/
cm2):
N/
A
[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
100
TBD
scouting,
weeding
immature/
low
foliage
plants
Medium
400
418
to
1980
scouting,
weeding
more
mature/
foliaged
plants
DAT
DFR
LEVELS
DOSE
MOES
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
Medium
Exposure
Low
Medium
0
2.244
2.244
0.0017
0.0069
14408
3602
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C7
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Sugarcane
Specific
Crop(
s)
Considered:
Sugarcane
Application
Rate
of
Crop
(
lb
ae/
A):
2
Application
Rate
Source:
Master
Label
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
0
Source:
N/
A
Slope
of
Semilog
Regression:
N/
A
[
Initial]
(
ug/
cm2):
N/
A
Study
Application
Rate
(
lb
ae/
A):
2
Limit
of
Quantification
(
ug/
cm2):
N/
A
[
Note:
Enter
application
rate
of
crop
if
no
data
available
in
study
rate
cell.]

Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
N/
A
N/
A
N/
A
Medium
1000
418
to
1980
Scouting
immature
plants
High
2000
418
to
1980
Scouting
mature
plants
Very
High
N/
A
N/
A
N/
A
DAT
DFR
LEVELS
DOSE
MOEs
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Medium
Exposure
High
Exposure
Medium
High
0
4.488
4.488
0.0347
0.0694
720
360
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C8
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Turf
Specific
Crop(
s)
Considered:
Golf
course
and
sodfarm
turf
Using
California
TTR
Data
Application
Rate
of
Crop
(
lb
ae/
A):
2
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
1
Source:
Turf
Task
Force
Slope
of
Semilog
Regression:
(
CA
TTR
Data)
­
0.26
[
Initial]
(
ug/
cm2):
(
CA
TTR
Data)
0.242
Study
Application
Rate
(
lb
ae/
A):
1.66
Limit
of
Quantification
(
ug/
cm2):
0.000879
Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
3400
N/
A
Mowing
Medium
N/
A
N/
A
N/
A
High
6800
N/
A
Transplanting,
handweeding
Very
High
N/
A
N/
A
N/
A
DAT
DFR
LEVELS
DOSE
MOEs
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
High
Exposure
Low
High
0
0.242
0.292
0.008
0.015
3261
1631
Appendix
C
­
Occupational
Post­
Application
Risks
of
2,4­
D
Short
Term
Exposures
Spreadsheet
C9
Chemical:
2,4­
D
Reason:
Short
Term
Exposure
Transfer
Coefficient
Group:
Turf
Specific
Crop(
s)
Considered:
Golf
course
and
sodfarm
turf
using
North
Carolina
TTR
Data
Application
Rate
of
Crop
(
lb
ae/
A):
2
DFR
Data
Summary
Data
Source
(
enter
1
if
data
available,
0
if
defaults):
1
Source:
Turf
Task
Force
Slope
of
Semilog
Regression:
(
NC
TTR
Data)
­
0.832
[
Initial]
(
ug/
cm2):
(
NC­
1
DMA
TTR
Data)
0.561
Study
Application
Rate
(
lb
ae/
A):
1.76
Limit
of
Quantification
(
ug/
cm2):
0.000879
Exposure
Inputs
Summary
Exposure
Potential
Transfer
Coefficients
(
cm2/
hour)
Activities
Used
For
RA
Range
Very
Low
N/
A
N/
A
N/
A
Low
3400
N/
A
Mowing,
Turf
Maintenance
Medium
N/
A
N/
A
N/
A
High
6800
N/
A
Transplanting,
handweeding
Very
High
N/
A
N/
A
N/
A
DAT
DFR
LEVELS
DOSE
MOEs
(
ug/
cm2)
(
mg/
kg/
day)

Not
Adjusted
Adjusted
For
Rate
Low
Exposure
High
Exposure
Low
High
0
0.561
0.638
0.017
0.034
1491
746
