Document ID: EPA-HQ-OPP-2005-0172-0049
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2005-08-03T04:00Z

II.
D.
5
­
Page
1
of
5
II.
D
Appendices:
Drinking
Water
Exposure
5.
Chemical­
Specific
Fate
and
Transport
Properties
Used
For
the
Water
Exposure
Models
Table
II.
D.
5.1:
Aldicarb
(
total
residues
including
the
sulfone
and
sulfoxide
degradates)
fate
and
transport
properties
Property/
Parameter
Variable
Name
Value
Units
References
Molecular
weight
mwt
190.2
g/
mol
MRID
00152095
Henry's
Law
Const.
henry
1.70E­
10
atmm
3/
mol
Acc
255979
Vapor
Pressure
vapr
1.00E­
06
torr
MRID
00152095
Solubility
sol
6000.0
mg/
L
Acc
255979
Kd
or
Koc
Kd
0.12
mL/
g
Minimum
non­
sand
value
for
aldicarb
sulfone
(
MRID
43560302)
Photolysis
half­
life
kdp
4
days
MRID
42498201
Aerobic
Aquatic
Metabolism
kbacw
4
(
x3)
=
12
days
MRID
44592107.
Single
acceptable
guideline
study
for
(
parent/
sulfoxide/
sulfone)
x
3;
corresponds
w/
DT90
Anaerobic
Aquatic
Metabolism
kbacs
24
days
No
data;
use
2X
aerobic
aquatic
half­
life
Aerobic
Soil
Metabolism
asm
55
days
Revised
from
2001
Aldicarb
RED
(
Carleton);
Upper
90th
pct
bound
on
mean
for
combined
parent+
sulfoxide+
sulfone
half­
life
from
19
soils
in
x
studies
(.
Hydrolysis:
pH
5
stable
days
Hydrolysis:
pH
7
stable
days
Hydrolysis:
pH
9
>
30
da
days
Hydrolyzed
only
at
pH9
(
MRID
00102065).

Application
Type
granular
NOTES:
Modeled
total
aldicarb
residues
Half­
life
values
used
in
inputs
based
on
combined
aldicarb
+
sulfone
+
sulfoxide
residues;
lowest
Kd
of
the
3
chemicals
used
for
mobility.
Assumes
equal
toxicity
of
parent,
degradates
App
adjusted
for
granular,
15%
left
on
surface
Assumed
15%
granules
left
on
surface.
Adjusted
rate
to
15%
of
reported
rate,
assumed
no
incorporation,
no
drift
II.
D.
5
­
Page
2
of
5
Table
II.
D.
5.2.
Carbaryl
fate
and
transport
properties
Property/
Parameter
PRZM
Variable
Name
Value
Units
Comments
/
References
Molecular
weight
mwt
201.22
g/
mol
Henry's
Law
Const.
henry
1.28E­
08
atmm
3/
mol
Vapor
Pressure
vapr
1.36E­
07
torr
Solubility
sol
32
mg/
L
Koc
Koc
196
mL/
g
Photolysis
half­
life
kdp
21
days
Aerobic
Aquatic
Metabolism
kbacw
29.6
days
Anaerobic
Aquatic
Metabolism
kbacs
216.6
days
Aerobic
Soil
Metabolism
asm
12
days
Hydrolysis:
pH
5
na
days
Stable
Hydrolysis:
pH
7
12
days
Hydrolysis:
pH
9
0.13
days
Method:
CAM
2
integer
Incorporation
Depth:
DEPI
0
cm
Foliar
Degradation
Rate
PLDKRT
3.71
days
90%
upper
CI
from
mean
of
30
studies
(
MRID
45860501)
Foliar
Washoff
Coefficient
FEXTRC
0.91
Table
II.
D.
5.3.
Carbofuran
fate
and
transport
properties
Property/
Parameter
PRZM
Variable
Name
Value
Units
Comments
/
References
Molecular
weight
mwt
221.5
g/
mol
Henry's
Law
Const.
henry
2.20E­
10
atmm
3/
mol
Vapor
Pressure
vapr
6.00E­
07
torr
Solubility
sol
7
mg/
L
Koc
Koc
36
mL/
g
mean
=
36
(
n=
23,
stdev
=
31)
Photolysis
half­
life
kdp
6
days
Aerobic
Aquatic
Metabolism
kbacw
642
days
No
data;
2X
aer
soil
metabolism
half­
life
Anaerobic
Aquatic
Metabolism
kbacs
days
Aerobic
Soil
Metabolism
asm
321
days
1
value
on
an
acidic
soil
Hydrolysis:
pH
5
days
Hydrolysis:
pH
7
28
days
Hydrolysis:
pH
9
days
II.
D.
5
­
Page
3
of
5
Table
II.
D.
5.4.
Formetanate
HCL
fate
and
transport
properties
Property/
Parameter
PRZM
Variable
Name
Value
Units
Comments
/
References
Molecular
weight
mwt
258
g/
mol
1997
EFED
RED
Henry's
Law
Const.
henry
atmm
3/
mol
Vapor
Pressure
vapr
1.60E­
06
torr
1997
EFED
RED
Solubility
sol
500000
mg/
L
1997
EFED
RED
Koc
Koc
340
mL/
g
1997
EFED
RED
Photolysis
half­
life
kdp
0.33
days
8
hr/
24
hr;
1997
EFED
RED
Aerobic
Aquatic
Metabolism
kbacw
12.8
days
No
data;
2X
aer
soil
metabolism
data
Anaerobic
Aquatic
Metabolism
kbacs
days
Aerobic
Soil
Metabolism
asm
6.4
days
1997
EFED
RED
Hydrolysis:
pH
5
1515
days
1997
EFED
RED
Hydrolysis:
pH
7
24
days
1997
EFED
RED
Hydrolysis:
pH
9
24
days
1997
EFED
RED
Method:
CAM
2
integer
Incorporation
Depth:
DEPI
0
cm
Table
II.
D.
5.5.
Methomyl
fate
and
transport
properties
Property/
Parameter
PRZM
Variable
Name
Value
Units
Comments
/
References
Molecular
weight
mwt
162
g/
mol
Henry's
Law
Const.
henry
1.80E­
10
atmm
3/
mol
Vapor
Pressure
vapr
5.00E­
05
torr
Solubility
sol
58000
mg/
L
Koc
Koc
24
mg/
L
average
of
range
19­
34;
MRID
00161884
Photolysis
half­
life
kdp
3
days
MRID
00161885
Aerobic
Aquatic
Metabolism
kbacw
7
days
MRID
43325401;
90th
c.
b.
4,
5
Anaerobic
Aquatic
Metabolism
kbacs
28
days
MRID
41384301,
supported
by
supplemental
data;
2x
anaerobic
soil
metabolism
Aerobic
Soil
Metabolism
asm
79
days
90%
upper
c.
b.
of
2
studies
(
14,
46)
(
MRIDs
008568,
43217901)
Hydrolysis:
pH
5
stable
(
0)
days
MRID
00131249
Hydrolysis:
pH
7
stable
(
0)
days
MRID
00131249
Hydrolysis:
pH
9
30
days
MRID
00131249
Method:
CAM
2
integer
aerial/
foliar
Incorporation
Depth:
DEPI
0
cm
II.
D.
5
­
Page
4
of
5
Table
II.
D.
5.6.
Oxamyl
fate
and
transport
properties
Property/
Parameter
PRZM
Variable
Name
Value
Units
Comments
/
References
Molecular
weight
mwt
219
g/
mol
Henry's
Law
Const.
henry
2.38E­
07
atmm
3/
mol
Vapor
Pressure
vapr
3.80E­
07
torr
Solubility
sol
280000
mg/
L
Koc
Koc
6
mL/
g
Mean
Koc
of
9
soils
(
Acc.
No.
154748
(
s),
40494(
s)
Photolysis
half­
life
kdp
11
days
MRID
406065­
15;
Acc.
No.
40494
Aerobic
Aquatic
Metabolism
kbacw
40
days
No
data;
assume
2X
aer
soil
met
half­
life
Anaerobic
Aquatic
Metabolism
kbacs
7
days
MRID
428200­
01
(
c),
413462­
01
(
s),
Acc.
No.
4094
(
s),
113366
(
s)
Aerobic
Soil
Metabolism
asm
20
days
MRID
428200­
01
(
c),
413462­
01
(
s),
Acc.
No.
63012
(
c),
40494
(
s),
154748
(
s)
Hydrolysis:
pH
5
stable
days
MRID
40605­
16(
c),
ACC
No.
40494
(
s)
Hydrolysis:
pH
7
8
days
MRID
40605­
16(
c),
ACC
No.
40494
(
s)
Hydrolysis:
pH
9
0.13
days
MRID
40605­
16(
c),
ACC
No.
40494
(
s)
Method:
CAM
2
integer
Incorporation
Depth:
DEPI
0
cm
II.
D.
5
­
Page
5
of
5
Table
II.
D.
5.7.
Thiodicarb
fate
and
transport
properties
Property/
Parameter
PRZM
Variable
Name
Value
Units
Comments
/
References
Molecular
weight
mwt
354.46
g/
mol
Henry's
Law
Const.
henry
1.10E­
06
atmm
3/
mol
Vapor
Pressure
vapr
4.30E­
05
torr
Solubility
sol
19
mg/
L
Koc
Koc
485
mL/
g
average
Photolysis
half­
life
kdp
8
days
Aerobic
Aquatic
Metabolism
kbacw
3
days
No
data
available;
2X
aer
soil
met
halflife
Anaerobic
Aquatic
Metabolism
kbacs
0.375
days
Aerobic
Soil
Metabolism
asm
1.5
days
Hydrolysis:
pH
5
78
days
Hydrolysis:
pH
7
32
days
Hydrolysis:
pH
9
0.50
days
Method:
CAM
2
integer
Incorporation
Depth:
DEPI
0
cm
NOTES
Model
methomyl
as
degradate
w/
80%
conversion
Take
thiodicarb
app
rate
*
0.80
(
conversion
based
on
soil
metabolism
studies).
Shift
app
date
+
2
days
(
asm
half­
life);
no
drift
since
this
is
transformation
after
app
only