Page
1
of
15
UNITED
STATES
ENVIRONMENTAL
PROTECTION
AGENCY
WASHINGTON,
D.
C.
20460
April
22,
2004
MEMORANDUM
SUBJECT:
Revised
Environmental
Modeling
for
Zinc
Omadine
(
Zinc
pyrithione)

From:
Siroos
Mostaghimi,
Ph.
D.,
Senior
Scientist
Risk
Assessment
and
Science
Support
Branch
(
RASSB)
Antimicrobials
Division
(
7510C)

To:
Deborah
Smegal,
MPH,
Toxicologist
Risk
Assessment
and
Science
Support
Branch
(
RASSB)
Antimicrobials
Division
(
7510C)

Thru:
Norm
Cook,
Chief
Risk
Assessment
and
Science
Support
Branch
(
RASSB)
Antimicrobials
Division
(
7510C)

DP
Barcode
(
s):
301373
Pesticide
Chemical
No.:
088002
Review
Time:
60
Hours
MRID
#:
N/
A
Attached
please
find
the
revised
environmental
modeling
for
the
use
of
Zinc
Omadine
as
an
antifoulant.
Page
2
of
15
INTRODUCTION
In
2002
RASSB
used
the
Luttic­
Johnson
model
to
estimate
the
environmental
concentrations
of
zinc
Omadine
as
an
antifoulant.
Since
then
several
new
and
more
sophisticated
models
have
been
developed
which
could
be
used
for
estimating
the
concentration
of
antifoulants
in
water.
The
purpose
of
this
report
is
to
revisit
the
modeling
issues
related
to
zinc
Omadine
as
an
antifoulant.

RASSB
has
decided
to
use
MAM­
PEC
(
Marine
Antifoulant
Model­
Predicted
Environmental
Concentrations)
which
was
developed
by
the
van
Huttum
et
al.
(
2002).

According
to
MAM­
PEC
Manual,
the
model
calculates
adsorbed
and
dissolved
concentrations
of
antifoulants
in
the
environment.
MAM­
PEC
estimates
environmental
concentrations
in
the
following
marine
environments:

1.
Open
Seas
2.
Shipping
lane
3.
Estuary
4.
Commercial
harbor
5.
Yachting
marina
In
addition
specific
defined
environments
can
be
added
to
the
model.

MAM­
PEC
takes
into
account
the
following
factors:

A.
Emission
Factors
such
as:


Leaching
rates

Shipping
intensities

Ship
hull
underwater
surface
areas

Residence
time
B.
Compound
Related
Properties
such
as:


Hydrolysis

Photolysis

Bacterial
degradation

Volatilization

Speciation

Kd

Kow

Koc
C.
Properties
and
Processes
Related
to
the
Specific
Environment
such
as:
Page
3
of
15

Suspended
matter
load

salinity

Tides

Currents
The
Arch
Chemical
Company
in
their
response
to
the
RASSB
risk
assessment
have
indicated
that
the
leaching
rate
which
we
have
used
for
modeling
this
compound
is
too
high
(
12.5

g/
cm2/
day)
and
not
a
good
representative
for
leaching
of
this
compound.
They
also
indicate
that
the
high
rate
is
because
of
the
testing
method.
Dr.
Najm
Shamim
has
reviewed
the
new
leaching
data
submitted
to
EPA
and
he
reports
the
range
of
acceptable
leaching
rates
for
Zinc
Omadine
between
1.2

g
/
cm2
/
day
to
8.4

g
/
cm2
/
day
(
Please
refer
to
the
Environmental
fate
chapter
for
Zinc
Omadine).
Therefore,
RASSB
has
decided
to
provide
a
range
of
PECs
(
Predicted
Environmental
Concentrations)
using
the
acceptable
leaching
rates.
The
default
scenarios
provided
in
MAM­
PEC
were
used
and
the
only
changes
were
the
leaching
rates.

RESULTS:

A.
Summary:

The
following
table
shows
the
leaching
rates
and
their
correspondents
PECs
as
estimated
by
MAM­
PEC:

Leaching
Rate
(

g/
cm2/
day)
Average
Concentration
(

g/
L)

1.2
(
Low)
0.0144
4.8
(
Average)
0.0576
8.4
(
High)
0.101
The
followings
provide
a
more
detailed
description
of
the
scenarios
as
well
as
results
obtained
from
MAM­
PEC
runs.
It
should
be
noted
that
MAM­
PEC
provides
maximum,
95%,
average,
median
and
minimum
concentrations.
The
average
concentrations
are
reported
in
the
aforementioned
Table.
The
estimated
concentrations
according
to
leaching
rates
as
well
input
scenarios
used
to
run
MAM­
PEC
are
provided
bellow:

B.
MAMPEC
­
Result
Sheet
for
Leaching
Rate
of
1.2

g
/
cm2/
day
Run
:
Zinc
Omadine,
Version
:
MamPec
1.4.16
Run
date
:
3/
25/
2004
8:
05:
10
AM
Page
4
of
15
Input
Environment
:
Default
marina
Compound
:
Zinc
Omadine
(
default)
Emission
:
Default
Marina
biocide
100
%
(
1.2)
Load
:
8.07E+
01:
g/
d
Results
Total
concentration
in
harbor
Maximum
concentration
:
2.65E­
02
:
ug/
l
95
%
concentration
:
2.61E­
02
:
ug/
l
Average
concentration
:
1.44E­
02
:
ug/
l
Median
concentration
:
1.32E­
02
:
ug/
l
Minimum
concentration
:
2.56E­
03
:
ug/
l
Dissolved
concentration
in
harbor
Maximum
concentration:
2.65E­
02
:
ug/
l
95
%
concentration
:
2.61E­
02
:
ug/
l
Average
concentration:
1.44E­
02
:
ug/
l
Median
concentration
:
1.32E­
02
:
ug/
l
Minimum
concentration
:
2.56E­
03
:
ug/
l
Contaminant
concentration
on
suspended
solids
Maximum
concentration
:
7.57E­
04
:
ug/
g
dw
95
%
concentration
:
7.44E­
04
:
ug/
g
dw
Average
concentration:
4.11E­
04
:
ug/
g
dw
Median
concentration
:
3.77E­
04
:
ug/
g
dw
Minimum
concentration:
7.30E­
05
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
1
year
of
use
Maximum
concentration
:
3.40E­
09
:
ug/
g
dw
95
%
concentration
:
3.34E­
09
:
ug/
g
dw
Average
concentration:
1.85E­
09
:
ug/
g
dw
Median
concentration
:
1.70E­
09
:
ug/
g
dw
Minimum
concentration:
3.28E­
10
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
2
years
of
use
Maximum
concentration
:
3.40E­
09
:
ug/
g
dw
95
%
concentration
:
3.34E­
09
:
ug/
g
dw
Average
concentration
:
1.85E­
09
:
ug/
g
dw
Median
concentration
:
1.70E­
09
:
ug/
g
dw
Minimum
concentration
:
3.28E­
10
:
ug/
g
dw
Page
5
of
15
Contaminant
concentration
in
sediment
after
5
years
of
use
Maximum
concentration
:
3.40E­
09
:
ug/
g
dw
95
%
concentration
:
3.34E­
09
:
ug/
g
dw
Average
concentration
:
1.85E­
09
:
ug/
g
dw
Median
concentration
:
1.70E­
09
:
ug/
g
dw
Minimum
concentration
:
3.28E­
10
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
10
years
of
use
Maximum
concentration
:
3.40E­
09
:
ug/
g
dw
95
%
concentration
:
3.34E­
09
:
ug/
g
dw
Average
concentration
:
1.85E­
09
:
ug/
g
dw
Median
concentration
:
1.70E­
09
:
ug/
g
dw
Minimum
concentration
:
3.28E­
10
:
ug/
g
dw
MAMPEC
­
Input
data
sheet
Compound
Name
:
Zinc­
pyrithione
Description
:
Zinc
Omadine
(
default)
Molecular
mass
:
317.7
:
g/
Mol
Vapor
pressure
:
1.00E­
06
:
Pa
Solubility
:
6.00E+
00
:
g/
m3
Octanol­
water
coefficient
:
9.30E­
01
:(­)
Log
(
Kow)
Kd
:
0.00E+
00
:
m3/
kg
Koc
:
3.00E+
00
:(­)
Log(
Koc),
Koc
expressed
as
l/
kg
OrganicCarbon
Henry's
coefficient
:
5.00E­
05
:
Pa.
m3/
mol
Melting
temperature
:
260.0
:
oC
pKa
:
0.0
:(­)
in
water
Biological
degradation
rate
:
2.08E+
00
:
1/
d
Hydrolytic
degradation
rate
:
5.40E­
02
:
1/
d
Photolytic
degradation
rate
:
5.50E+
00
:
1/
d
in
sediment
Biological
degradation
rate
:
7.90E+
00
:
1/
d
Hydrolytic
degradation
rate
:
3.30E+
01
:
1/
d
Photolytic
degradation
rate
:
0.00E+
00
:
1/
d
Environment
Description
:
Default
marina
Silt
concentration
:
35.0
:
g/
m3
Particular
organic
carbon
conc
:
1.0
:
g
Organic
Carbon/
m3
Dissolved
organic
carbon
conc
:
2.0
:
g/
m3
Temperature
:
20.0
:
oC
Salinity
:
3.40E+
01
:
s.
e.
Page
6
of
15
Depth
well­
mixed
sediment
top
layer
:
1.00E­
01
:
m
Sediment
density
:
1.000E+
03
:
kg/
m3
Fraction
organic
carbon
in
sediment
:
3.00E­
02
:
kg/
m3
Nett
sedimentation
velocity
:
5.00E­
01
:
m/
d
pH
:
8.0
:(­)
Background
concentrations
:
0.00E+
00
:
ug/
l
Length
of
river,
not
part
of
harbor
(
x1)
:
400
:
m
Length
of
harbor
(
y1)
(
Á
river
or
coast)
:
400
Width
of
harbor
(
x2)(//
river
or
coast)
:
400
:
m
Width
of
river
(
y2)
:
400
:
m
Depth
of
harbor
:
3.5
:
m
Length
of
open
harbour
mouth
(
x3)
:
100
:
m
Flow
:
1
:
m/
s
Flow
of
flushing
into
harbor
:
0
:
m3/
s
Tidal
height
:
1
:
m
Density
difference
:
0.1
:
kg/
m3
Density
difference
flushing
:
0
:
kg/
m3
Tidal
period
:
12.41
:
h
Exchange
surface
:
350
:
m2
Depth
at
harbour
mouth
:
3.5
:
m
Height
underwater
dam
at
mouth
:
0
:
m
Width
underwater
dam
at
mouth
:
0
:
m
Length
selected
area
:
0
:
m
Width
selected
area
:
0
:
m
Depth
selected
area
:
0
:
m
Flow
:
0
:
m/
s
Exchange
volume
in
1
tidal
period
:
243420:
m3
Emission
Description
:
Default
Marina
biocide
100
%
(
1.2)
Load
:
80.73
:
g/
d
Loading
due
to
moving
ships
:
0
:
g/
d
Loading
due
to
ships
at
berth
:
80.73
:
g/
d
Leaching
rate
ships
at
berth
:
1.2
:
ug/
cm2/
d
Leaching
rate
ships
at
berth
:
1.2
:
ug/
cm2/
d
Number
of
ships
at
berth
(
Class
1)
:
0
Number
of
ships
at
berth
(
Class
2)
:
299
Number
of
ships
at
berth
(
Class
3)
:
0
Number
of
ships
at
berth
(
Class
4)
:
0
Number
of
ships
at
berth
(
Class
5)
:
0
Number
of
ships
at
berth
(
Class
6)
:
0
Number
of
ships
at
berth
(
Class
7)
:
0
Number
of
ships
at
berth
(
Class
8)
:
0
Number
of
ships
at
berth
(
Class
9
:
0
Number
of
ships
at
berth
(
Class
10)
:
0
Number
of
moving
ships
(
Class
1)
:
0
Number
of
moving
ships
(
Class
2)
:
0
Number
of
moving
ships
(
Class
3)
:
0
Number
of
moving
ships
(
Class
4)
:
0
Number
of
moving
ships
(
Class
5)
:
0
Page
7
of
15
Number
of
moving
ships
(
Class
6)
:
0
Number
of
moving
ships
(
Class
7)
:
0
Number
of
moving
ships
(
Class
8)
:
0
Number
of
moving
ships
(
Class
9)
:
0
Number
of
moving
ships
(
Class
10)
:
0
Application
factor
(
Class
1)
:
0
:%
Application
factor
(
Class
2)
:
100:%
Application
factor
(
Class
3)
:
0
:%
Application
factor
(
Class
4)
:
0
:%
Application
factor
(
Class
5)
:
0
:%
Application
factor
(
Class
6)
:
20
:%
Application
factor
(
Class
7)
:
20
:%
Application
factor
(
Class
8)
:
20
:%
Application
factor
(
Class
9)
:
20
:%
Application
factor
(
Class
10)
:
20
:%
Underwater
ship
area
(
Class
1)
:
20
:
m2
Underwater
ship
area
(
Class
2)
:
22.5:
m2
Underwater
ship
area
(
Class
3)
:
450
:
m2
Underwater
ship
area
(
Class
4)
:
3061
:
m2
Underwater
ship
area
(
Class
5)
:
5999
:
m2
Underwater
ship
area
(
Class
6)
:
9917
:
m2
Underwater
ship
area
(
Class
7)
:
14814
:
m2
Underwater
ship
area
(
Class
8)
:
22645
:
m2
Underwater
ship
area
(
Class
9)
:
27547
:
m2
Underwater
ship
area
(
Class
10)
:
39668
:
m2
Ship
Length
(
Class
1)
:
0­
10
:
m
Ship
Length
(
Class
2)
:
10­
50
:
m
Ship
Length
(
Class
3)
:
50­
100
:
m
Ship
Length
(
Class
4)
:
100­
150
:
m
Ship
Length
(
Class
5)
:
150­
200
:
m
Ship
Length
(
Class
6)
:
200­
250
:
m
Ship
Length
(
Class
7)
:
250­
300
:
m
Ship
Length
(
Class
8)
:
300­
350
:
m
Ship
Length
(
Class
9)
:
350­
400
:
m
Ship
Length
(
Class
10)
:
>
400
:
m
C.
MAMPEC
­
Result
Sheet
for
Leaching
Rate
of
4.8

g/
cm2/
day
Run
:
Zinc
Omadine,
Version
:
MamPec
1.4.16
Run
date
:
3/
25/
2004
8:
07:
39
AM
Input
Environment
:
Default
marina
Compound
:
Zinc
Omadine
(
default)
Emission
:
Default
Marina
biocide
100
%
(
4.8)
Load
:
3.23E+
02:
g/
d
Results
Total
concentration
in
harbor
Page
8
of
15
Maximum
concentration
:
1.06E­
01
:
ug/
l
95
%
concentration
:
1.04E­
01
:
ug/
l
Average
concentration
:
5.76E­
02
:
ug/
l
Median
concentration
:
5.29E­
02
:
ug/
l
Minimum
concentration
:
1.02E­
02
:
ug/
l
Dissolved
concentration
in
harbor
Maximum
concentration
:
1.06E­
01
:
ug/
l
95
%
concentration
:
1.04E­
01
:
ug/
l
Average
concentration
:
5.75E­
02
:
ug/
l
Median
concentration
:
5.28E­
02
:
ug/
l
Minimum
concentration
:
1.02E­
02
:
ug/
l
Contaminant
concentration
on
suspended
solids
Maximum
concentration
:
3.03E­
03
:
ug/
g
dw
95
%
concentration
:
2.98E­
03
:
ug/
g
dw
Average
concentration
:
1.64E­
03
:
ug/
g
dw
Median
concentration
:
1.51E­
03
:
ug/
g
dw
Minimum
concentration
:
2.92E­
04
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
1
year
of
use
Maximum
concentration
:
1.36E­
08
:
ug/
g
dw
95
%
concentration
:
1.34E­
08
:
ug/
g
dw
Average
concentration
:
7.38E­
09
:
ug/
g
dw
Median
concentration
:
6.78E­
09
:
ug/
g
dw
Minimum
concentration
:
1.31E­
09
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
2
years
of
use
Maximum
concentration
:
1.36E­
08
:
ug/
g
dw
95
%
concentration
:
1.34E­
08
:
ug/
g
dw
Average
concentration
:
7.38E­
09
:
ug/
g
dw
Median
concentration
:
6.78E­
09
:
ug/
g
dw
Minimum
concentration
:
1.31E­
09
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
5
years
of
use
Maximum
concentration
:
1.36E­
08
:
ug/
g
dw
95
%
concentration
:
1.34E­
08
:
ug/
g
dw
Average
concentration
:
7.38E­
09
:
ug/
g
dw
Median
concentration
:
6.78E­
09
:
ug/
g
dw
Minimum
concentration
:
1.31E­
09
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
10
years
of
use
Maximum
concentration
:
1.36E­
08
:
ug/
g
dw
95
%
concentration
:
1.34E­
08
:
ug/
g
dw
Average
concentration
:
7.38E­
09
:
ug/
g
dw
Page
9
of
15
Median
concentration
:
6.78E­
09
:
ug/
g
dw
Minimum
concentration
:
1.31E­
09
:
ug/
g
dw
MAMPEC
­
Input
data
sheet
Compound
Name
:
Zinc­
pyrithione
Description
:
Zinc
Omadine
(
default)
Molecular
mass
:
317.7
:
g/
Mol
Vapor
pressure
:
1.00E­
06
:
Pa
Solubility
:
6.00E+
00
:
g/
m3
Octanol­
water
coefficient
:
9.30E­
01
:(­)
Log
(
Kow)
Kd
:
0.00E+
00
:
m3/
kg
Koc
:
3.00E+
00
:(­)
Log(
Koc),
Koc
expressed
as
l/
kg
OrganicCarbon
Henry's
coefficient
:
5.00E­
05
:
Pa.
m3/
mol
Melting
temperature
:
260.0
:
oC
pKa
:
0.0
:(­)
in
water
Biological
degradation
rate
:
2.08E+
00
:
1/
d
Hydrolytic
degradation
rate
:
5.40E­
02
:
1/
d
Photolytic
degradation
rate
:
5.50E+
00
:
1/
d
in
sediment
Biological
degradation
rate
:
7.90E+
00
:
1/
d
Hydrolytic
degradation
rate
:
3.30E+
01
:
1/
d
Photolytic
degradation
rate
:
0.00E+
00
:
1/
d
Environment
Description
:
Default
marina
Silt
concentration
:
35.0
:
g/
m3
Particular
organic
carbon
conc
:
1.0
:
g
Organic
Carbon/
m3
Dissolved
organic
carbon
conc
:
2.0
:
g/
m3
Temperature
:
20.0
:
oC
Salinity
:
3.40E+
01
:
s.
e.
Depth
well­
mixed
sediment
top
layer
:
1.00E­
01
:
m
Sediment
density
:
1.000E+
03
:
kg/
m3
Fraction
organic
carbon
in
sediment
:
3.00E­
02
:
kg/
m3
Nett
sedimentation
velocity
:
5.00E­
01
:
m/
d
pH
:
8.0
:
(­)
Background
concentrations
:
0.00E+
00
:
ug/
l
Length
of
river,
not
part
of
harbor
(
x1)
:
400
:
m
Length
of
harbor
(
y1)
(
Á
river
or
coast)
:
400
Width
of
harbor
(
x2)(//
river
or
coast)
:
400
:
m
Width
of
river
(
y2)
:
400
:
m
Depth
of
harbor
:
3.5
:
m
Length
of
open
harbor
mouth
(
x3)
:
100
:
m
Flow
:
1
:
m/
s
Flow
of
flushing
into
harbor
:
0
:
m3/
s
Page
10
of
15
Tidal
height
:
1
m
Density
difference
:
0.1
:
kg/
m3
Density
difference
flushing
:
0
:
kg/
m3
Tidal
period
:
12.41
:
h
Exchange
surface
:
350
:
m2
Depth
at
harbour
mouth
:
3.5
:
m
Height
underwater
dam
at
mouth
:
0
:
m
Width
underwater
dam
at
mouth
:
0
:
m
Length
selected
area
:
0
:
m
Width
selected
area
:
0
:
m
Depth
selected
area
:
0
:
m
Flow
:
0
:
m/
s
Exchange
volume
in
1
tidal
period
:
243420
:
m3
Emission
Description
:
Default
Marina
biocide
100
%
(
4.8)
Load
:
322.92
:
g/
d
Loading
due
to
moving
ships
:
0
:
g/
d
Loading
due
to
ships
at
berth
:
322.92
:
g/
d
Leaching
rate
ships
at
berth
:
4.8
:
ug/
cm2/
d
Leaching
rate
ships
at
berth
:
4.8
:
ug/
cm2/
d
Number
of
ships
at
berth
(
Class
1)
:
0
Number
of
ships
at
berth
(
Class
2)
:
299
Number
of
ships
at
berth
(
Class
3)
:
0
Number
of
ships
at
berth
(
Class
4)
:
0
Number
of
ships
at
berth
(
Class
5)
:
0
Number
of
ships
at
berth
(
Class
6)
:
0
Number
of
ships
at
berth
(
Class
7)
:
0
Number
of
ships
at
berth
(
Class
8)
:
0
Number
of
ships
at
berth
(
Class
9
:
0
Number
of
ships
at
berth
(
Class
10):
0
Number
of
moving
ships
(
Class
1)
:
0
Number
of
moving
ships
(
Class
2)
:
0
Number
of
moving
ships
(
Class
3)
:
0
Number
of
moving
ships
(
Class
4)
:
0
Number
of
moving
ships
(
Class
5)
:
0
Number
of
moving
ships
(
Class
6)
:
0
Number
of
moving
ships
(
Class
7)
:
0
Number
of
moving
ships
(
Class
8)
:
0
Number
of
moving
ships
(
Class
9)
:
0
Number
of
moving
ships
(
Class
10)
:
0
Application
factor
(
Class
1)
:
0
:%
Application
factor
(
Class
2)
:
100
:%
Application
factor
(
Class
3)
:
0
:%
Application
factor
(
Class
4)
:
0
:%
Application
factor
(
Class
5)
:
0
:%
Application
factor
(
Class
6)
:
20
:%
Application
factor
(
Class
7)
:
20
:%
Application
factor
(
Class
8)
:
20
:%
Application
factor
(
Class
9)
:
20
:%
Application
factor
(
Class
10)
:
20
:%
Page
11
of
15
Underwater
ship
area
(
Class
1)
:
20
:
m2
Underwater
ship
area
(
Class
2)
:
22.5
:
m2
Underwater
ship
area
(
Class
3)
:
450
:
m2
Underwater
ship
area
(
Class
4)
:
3061
:
m2
Underwater
ship
area
(
Class
5)
:
5999
:
m2
Underwater
ship
area
(
Class
6)
:
9917
:
m2
Underwater
ship
area
(
Class
7)
:
14814
:
m2
Underwater
ship
area
(
Class
8)
:
22645
:
m2
Underwater
ship
area
(
Class
9)
:
27547
:
m2
Underwater
ship
area
(
Class
10)
:
39668
:
m2
Ship
Length
(
Class
1)
:
0­
10
:
m
Ship
Length
(
Class
2)
:
10­
50
:
m
Ship
Length
(
Class
3)
:
50­
100
:
m
Ship
Length
(
Class
4)
:
100­
150
:
m
Ship
Length
(
Class
5)
:
150­
200
:
m
Ship
Length
(
Class
6)
:
200­
250
:
m
Ship
Length
(
Class
7)
:
250­
300
:
m
Ship
Length
(
Class
8)
:
300­
350
:
m
Ship
Length
(
Class
9)
:
350­
400
:
m
Ship
Length
(
Class
10)
:
>
400
:
m
D.
MAMPEC
­
Result
Sheet
for
Leaching
Rate
of
8.4

g/
cm2/
day
Run
:
Zinc
Omadine
Version
:
MamPec
1.4.16
Run
date
:
3/
25/
2004
7:
56:
12
AM
Input
Environment
:
Default
marina
Compound
:
Zinc
Omadine
(
default)
Emission
:
Default
Marina
biocide
100
%
(
1)
Load
:
5.65E+
02:
g/
d
Results
Total
concentration
in
harbor
Maximum
concentration
:
1.86E­
01
:
ug/
l
95
%
concentration
:
1.83E­
01
:
ug/
l
Average
concentration
:
1.01E­
01
:
ug/
l
Median
concentration
:
9.26E­
02
:
ug/
l
Minimum
concentration
:
1.79E­
02
:
ug/
l
Dissolved
concentration
in
harbor
Maximum
concentration
:
1.85E­
01
:
ug/
l
95
%
concentration
:
1.82E­
01
:
ug/
l
Average
concentration
:
1.01E­
01
:
ug/
l
Median
concentration
:
9.24E­
02
:
ug/
l
Minimum
concentration
:
1.79E­
02
:
ug/
l
Page
12
of
15
Contaminant
concentration
on
suspended
solids
Maximum
concentration
:
5.30E­
03
:
ug/
g
dw
95
%
concentration
:
5.21E­
03
:
ug/
g
dw
Average
concentration
:
2.88E­
03
:
ug/
g
dw
Median
concentration
:
2.64E­
03
:
ug/
g
dw
Minimum
concentration
:
5.11E­
04
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
1
year
of
use
Maximum
concentration
:
2.38E­
08
:
ug/
g
dw
95
%
concentration
:
2.34E­
08
:
ug/
g
dw
Average
concentration
:
1.29E­
08
:
ug/
g
dw
Median
concentration
:
1.19E­
08
:
ug/
g
dw
Minimum
concentration
:
2.30E­
09
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
2
years
of
use
Maximum
concentration
:
2.38E­
08
:
ug/
g
dw
95
%
concentration
:
2.34E­
08
:
ug/
g
dw
Average
concentration
:
1.29E­
08
:
ug/
g
dw
Median
concentration
:
1.19E­
08
:
ug/
g
dw
Minimum
concentration
:
2.30E­
09
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
5
years
of
use
Maximum
concentration
:
2.38E­
08
:
ug/
g
dw
95
%
concentration
:
2.34E­
08
:
ug/
g
dw
Average
concentration
:
1.29E­
08
:
ug/
g
dw
Median
concentration
:
1.19E­
08
:
ug/
g
dw
Minimum
concentration
:
2.30E­
09
:
ug/
g
dw
Contaminant
concentration
in
sediment
after
10
years
of
use
Maximum
concentration
:
2.38E­
08
:
ug/
g
dw
95
%
concentration
:
2.34E­
08
:
ug/
g
dw
Average
concentration
:
1.29E­
08
:
ug/
g
dw
Median
concentration
:
1.19E­
08
:
ug/
g
dw
Minimum
concentration
:
2.30E­
09
:
ug/
g
dw
MAMPEC
­
Input
data
sheet
Compound
Name
:
Zinc­
pyrithione
Description
:
Zinc
Omadine
(
default)
Molecular
mass
:
317.7
:
g/
Mol
Vapor
pressure
:
1.00E­
06
:
Pa
Solubility
:
6.00E+
00
:
g/
m3
Octanol­
water
coefficient
:
9.30E­
01
:(­)
Log
(
Kow)
Kd
:
0.00E+
00
:
m3/
kg
Page
13
of
15
Koc
:
3.00E+
00
:(­)
Log(
Koc),
Koc
expressed
as
l/
kg
OrganicCarbon
Henry's
coefficient
:
5.00E­
05
:
Pa.
m3/
mol
Melting
temperature
:
260.0
:
oC
pKa
:
0.0
:(­)
in
water
Biological
degradation
rate:
2.08E+
00
:
1/
d
Hydrolytic
degradation
rate:
5.40E­
02
:
1/
d
Photolytic
degradation
rate:
5.50E+
00
:
1/
d
in
sediment
Biological
degradation
rate:
7.90E+
00
:
1/
d
Hydrolytic
degradation
rate:
3.30E+
01
:
1/
d
Photolytic
degradation
rate:
0.00E+
00
:
1/
d
Environment
Description
:
Default
marina
Silt
concentration
:
35.0
:
g/
m3
Particular
organic
carbon
conc
:
1.0
:
g
Organic
Carbon/
m3
Dissolved
organic
carbon
conc
:
2.0
:
g/
m3
Temperature
:
20.0
:
oC
Salinity
:
3.40E+
01
:
s.
e.
Depth
well­
mixed
sediment
top
layer
:
1.00E­
01
:
m
Sediment
density
:
1.000E+
03
:
kg/
m3
Fraction
organic
carbon
in
sediment
:
3.00E­
02
:
kg/
m3
Nett
sedimentation
velocity
:
5.00E­
01
:
m/
d
pH
:
8.0
:(­)
Background
concentrations
:
0.00E+
00
:
ug/
l
Length
of
river,
not
part
of
harbor
(
x1)
:
400
:
m
Length
of
harbor
(
y1)
(
Á
river
or
coast)
:
400
Width
of
harbor
(
x2)(//
river
or
coast)
:
400
:
m
Width
of
river
(
y2)
:
400
:
m
Depth
of
harbor
:
3.5
:
m
Length
of
open
harbor
mouth
(
x3)
:
100
:
m
Flow
:
1
:
m/
s
Flow
of
flushing
into
harbor
:
0
:
m3/
s
Tidal
height
:
1
:
m
Density
difference
:
0.1
:
kg/
m3
Density
difference
flushing
:
0
:
kg/
m3
Tidal
period
:
12.41
:
h
Exchange
surface
:
350
:
m2
Depth
at
harbor
mouth
:
3.5
:
m
Height
underwater
dam
at
mouth
:
0
:
m
Width
underwater
dam
at
mouth
:
0
:
m
Length
selected
area
:
0
:
m
Width
selected
area
:
0
:
m
Depth
selected
area
:
0
:
m
Flow
:
0
:
m/
s
Exchange
volume
in
1
tidal
period
:
243420:
m3
Emission
Description
:
Default
Marina
biocide
100
%
(
1)
Page
14
of
15
Load
:
565.11
:
g/
d
Loading
due
to
moving
ships
:
0
:
g/
d
Loading
due
to
ships
at
berth
:
565.11
:
g/
d
Leaching
rate
ships
at
berth
:
8.4
:
ug/
cm2/
d
Leaching
rate
ships
at
berth
:
8.4
:
ug/
cm2/
d
Number
of
ships
at
berth
(
Class
1)
:
0
Number
of
ships
at
berth
(
Class
2)
:
299
Number
of
ships
at
berth
(
Class
3)
:
0
Number
of
ships
at
berth
(
Class
4)
:
0
Number
of
ships
at
berth
(
Class
5)
:
0
Number
of
ships
at
berth
(
Class
6)
:
0
Number
of
ships
at
berth
(
Class
7)
:
0
Number
of
ships
at
berth
(
Class
8)
:
0
Number
of
ships
at
berth
(
Class
9
:
0
Number
of
ships
at
berth
(
Class
10)
:
0
Number
of
moving
ships
(
Class
1)
:
0
Number
of
moving
ships
(
Class
2)
:
0
Number
of
moving
ships
(
Class
3)
:
0
Number
of
moving
ships
(
Class
4)
:
0
Number
of
moving
ships
(
Class
5)
:
0
Number
of
moving
ships
(
Class
6)
:
0
Number
of
moving
ships
(
Class
7)
:
0
Number
of
moving
ships
(
Class
8)
:
0
Number
of
moving
ships
(
Class
9)
:
0
Number
of
moving
ships
(
Class
10)
:
0
Application
factor
(
Class
1)
:
0
:%
Application
factor
(
Class
2)
:
100:%
Application
factor
(
Class
3)
:
0
:%
Application
factor
(
Class
4)
:
0
:%
Application
factor
(
Class
5)
:
0
:%
Application
factor
(
Class
6)
:
20
:%
Application
factor
(
Class
7)
:
20
:%
Application
factor
(
Class
8)
:
20
:%
Application
factor
(
Class
9)
:
20
:%
Application
factor
(
Class
10)
:
20
:%
Underwater
ship
area
(
Class
1)
:
20
:
m2
Underwater
ship
area
(
Class
2)
:
22.5:
m2
Underwater
ship
area
(
Class
3)
:
450:
m2
Underwater
ship
area
(
Class
4)
:
306:
m2
Underwater
ship
area
(
Class
5)
:
5999:
m2
Underwater
ship
area
(
Class
6)
:
9917:
m2
Underwater
ship
area
(
Class
7)
:
14814
:
m2
Underwater
ship
area
(
Class
8)
:
22645
:
m2
Underwater
ship
area
(
Class
9)
:
27547
:
m2
Underwater
ship
area
(
Class
10)
:
39668
:
m2
Ship
Length
(
Class
1)
:
0­
10
:
m
Ship
Length
(
Class
2)
:
10­
50
:
m
Ship
Length
(
Class
3)
:
50­
100:
m
Ship
Length
(
Class
4)
:
100­
150:
m
Ship
Length
(
Class
5)
:
150­
200:
m
Ship
Length
(
Class
6)
:
200­
250:
m
Ship
Length
(
Class
7)
:
250­
300:
m
Page
15
of
15
Ship
Length
(
Class
8)
:
300­
350:
m
Ship
Length
(
Class
9)
:
350­
400:
m
Ship
Length
(
Class
10)
:
>
400
:
m
E.
References
1.
B.
van
Hattum,
A.
C.
Baart
and
J.
G.
Boon.
2002.
Computer
model
to
generate
predicted
environmental
concentrations
(
PECs)
for
antifouling
products
in
the
marine
environment.
2nd
edition
accompanying
the
release
pf
MAM­
PEC
version
1.4.
B.

2.
MAM­
PEC
Manual
3.
Arch
Chemical
Inc.
2004.
Comments
on
the
Zinc
Omadine
preliminary
risk
assessment.

File:
c:\
Myfiles\
2004
Reports\
Revised
Environmental
Modeling
for
Zinc
Omadine.
wpd
cc:
RASSB
Chemical
files
Siroos
Mostaghimi
