Document ID: EPA-HQ-OPP-2006-0038-0015
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2006-02-15T05:00Z

DP
Barcode:
D312519
PC
Code:
127201
Date:
February
9,
2005
SUBJECT:
TRED
for
Triadimenol
(
PC
#
127201)
Drinking
Water
Assessment
Environmental
Fate
and
Effects
Division
FROM:
James
Breithaupt,
Agronomist
Environmental
Risk
Branch
II
Environmental
Fate
and
Effects
Division
(
7507C)

THROUGH:
Tom
Bailey,
Ph.
D.
Chief,
Environmental
Risk
Branch
2
Environmental
Fate
and
Effects
Division
(
7507C)

TO:
Susan
Lewis/
John
Pates,
PM
51
Registration
Division
(
7508C)

Attached
to
this
memo
is
the
drinking
water
assessment
for
triadimenol.
Triadimenol
is
used
as
a
seed
treatment
on
wheat,
barley,
oats,
rye,
corn,
and
cotton.
This
assessment
contains
residues
of
triadimenol,
but
not
free
1,2,4­
triazole.
Based
on
personal
communication
with
Richard
Griffin
of
HED,
the
exposure
and
toxicity
of
free
triazole
is
being
assessed
separately.
Page
2
of
16
I.
General
Conclusions
EFED
has
conducted
a
Tier
II
assessment
of
estimated
surface
water
and
Tier
I
ground
water
concentrations
of
triadimenol.
EFED
recommends
that
the
estimated
environmental
concentrations
(
EEC's)
generated
by
the
PRZM­
EXAMS
model
be
used
for
drinking
water
from
surface
water
sources.
The
concentrations
reported
are
based
on
the
maximum
calculated
application
rate
of
triadimenol
as
a
seed
treatment
for
each
crop.
For
drinking
water
derived
from
surface
water,
the
acute
concentrations
to
be
used
for
drinking
water
393
ng/
L
(
parts
per
trillion,
pptr)
for
wheat,
barley,
oats,
and
rye,
95
ng/
L
for
corn,
and
133
ng/
L
for
cotton.
The
chronic,
non­
cancer
concentrations
(
annual
means)
to
be
used
for
surface­
water
derived
drinking
water
are
194,
34,
and
27
ng/
L,
respectively.
The
chronic,
cancer
concentrations
(
overall
means)
to
be
used
for
surfacewater
derived
drinking
water
are
128,
22,
and
14
ng/
L,
respectively.(
Table
2).
For
drinking
water
derived
from
ground
water,
the
SCI­
GROW2
model
estimates
concentrations
of
63,
18,
and
10
ng/
L,
respectively
(
Table
4).
The
SCI­
GROW2
value
should
be
used
for
acute,
chronic,
and
cancer
risk
assessment
on
each
of
their
respective
crops.
The
outputs
from
the
PRZM­
EXAMS
and
SCIGROW2
models
may
be
seen
in
Appendices
A
and
B,
respectively.
No
water
monitoring
data
are
available
for
this
compound
for
comparison
to
modeling.

II.
Use
Summary
Triadimenol
is
used
as
a
seed
treatment
on
wheat,
barley,
oats,
rye,
corn,
and
cotton.
The
maximum
use
rates,
adjusted
for
planting
rate,
range
from
0.006­
0.0375
lb
ai/
A
(
0.007­
0.042
kg
ai/
ha)
for
one
season
(
see
Table
1
below).
According
to
the
QUA,
the
cotton
use
accounts
for
about
75
%
of
the
total
pounds
of
active
ingredient
applied
annually.
Corn
and
wheat
account
for
about
20
%
and
5
%,
respectively.
About
80
%
of
the
acreage
planted
to
cotton
is
treated
with
the
fungicide,
and
less
than
1
%
of
corn
and
wheat
acres
are
treated.
Page
3
of
16
Table
1.
Maximum
labeled
application
rates
and
methods
for
seed
treatment
uses
of
triadimenol
(
values
in
bold
in
last
column
were
used
in
models).

End­
uses
(
planting
depth)
Max.
Label
Rates
(
lb
ai/
100
lb
seed)
#
Apps
Seeding
Rates
(
lbs/
A)
1
Seasonal
Max.
Rate
(
kg
ai/
Ha,
including
planting
rates)

Agricultural
Baytan
2.6
FS
Wheat
Barley
Oats
0.03
(
all
crops)
1
70­
125
60­
80
(
Plains)
80­
100
(
CA)
50­
60
(
drier
areas)

60­
100
0.024­
0.042
0.02­
0.027
0.027­
0.034
0.017­
0.02
0.02­
0.034
Gustafson
(
RTU­
Baytan­
Thiram),
0.43
lb
triadimenol/
gallon
Wheat
Barley
Oats
Rye
0.015­
0.03
(
all
crops)
1
70­
125
60­
80
(
Plains)
80­
100
(
CA)
50­
60
(
drier
areas)

60­
100
41
(
CO)­
86
(
GA)
0.024­
0.042
0.02­
0.027
0.027­
0.034
0.017­
0.02
0.02­
0.034
0.013­
0.029
Cotton
(
acid
delinted)
0.01­
0.04
1
102
0.002­
0.007
Baytan
30
(
2.65
lb
ai/
gallon)

Wheat
Barley
Oats
Rye
0.015­
0.03
1
70­
125
60­
80
(
Plains)
80­
100
(
CA)
50­
60
(
drier
areas)

60­
100
41
(
CO)­
86
(
GA)
0.024­
0.042
0.02­
0.027
0.027­
0.034
0.017­
0.02
0.02­
0.034
0.013­
0.029
Corn
0.06
1
193
0.012
Cotton
0.021­
0.06
1
102
0.002­
0.007
1
Unless
otherwise
noted,
the
information
come
s
from
Considine,
D.
M.
and
G.
D.
Considine.
Foods
and
Food
Production
Handbook.
1982.
Van
Nostrand
Reinhold
Company.
2
Based
on
http://
www.
agctr.
lsu.
edu/
cotton/
SEEDRATE.
html
3
Pers.
comm.
with
Dr.
Schmitt
of
Iowa
Extension
Service
III.
Environmental
Fate
Summary
Based
on
laboratory
studies
and
the
submitted
field
dissipation
study,
triadimenol
is
stable
in
sterile
water
and
to
photodegradation
on
soil,
but
may
photodegrade
in
shallow,
well­
mixed
surface
water
that
is
not
shaded
or
contains
a
significant
sediment
load.
The
primary
route
of
triadimenol
degradation
appears
to
be
microbial
activity.
Triadimenol
degraded
slowly
in
aerobic
soil
in
the
laboratory,
with
a
calculated
half­
life
of
238
days;
.
Triadimenol
does
not
degrade
under
anaerobic
conditions
and
appears
to
mobile
in
soil
(
Kd=
2.4­
5.3).
Since
triadimenol
is
used
as
a
seed
treatment,
Page
4
of
16
it
is
applied
below
the
soil
surface.
As
a
result,
runoff
to
surface
water
may
be
reduced
but
potential
for
groundwater
contamination
may
be
increased.

IV.
Water
Resources
Summary
A.
Surface
Water
Parent
triadimenol
may
move
from
the
treated
field
to
surface
water
through
run­
off
after
application.
Tier
II
drinking
water
concentrations
from
surface
water
sources
(
Table
2)
for
triadimenol
were
estimated
using
the
EFED
Shell
that
incorporates
PRZM­
EXAMS
and
the
Index
Reservoir.
Input
values
for
the
PRZM­
EXAMS
model
are
reported
in
Table
3.

B.
Ground
Water
Triadimenol
is
used
as
a
seed
treatment,
and
is
mobile
and
persistent
in
the
environment.
Therefore,
parent
compound
may
reach
ground
water
in
some
environments.
In
the
event
that
triadimenol
did
reach
ground
water,
the
available
routes
of
dissipation
would
be
dilution
because
it
appears
to
be
stable
under
anaerobic
conditions.
Table
4
below
summarizes
the
results
of
the
screening
level
groundwater
model,
SCI­
GROW2,
for
total
toxic
triadimenol.

Table
2.
Tier
II
surface
water
EEC's
using
PRZM­
EXAMS
for
drinking
water
for
triadimenol
for
use
on
crops
as
a
seed
treatment
EECs
(
ng/
L),
parts­
per­
trillion
Crop
Peak
4­
day
21­
day
60­
day
90­
day
Annual
Mean
Overall
mean
Wheat
(
for
wheat,
barley,
oats,
and
rye)
393
389
367
329
308
194
128
Corn
95
94
87
75
68
34
22
Cotton
133
128
114
87
73
27
14
Page
5
of
16
Table
3.
PRZM­
EXAMS
input
parameters
for
triadimenol
use
on
crops
as
a
seed
treatment.

Parameter
Input*
Source/
Rationale
Application
Rate
(
kg
ai/
ha)
Wheat
(
for
wheat,
barley,
oats,
and
rye)
Corn
Cotton
0.042
0.012
0.007
Maximum
label
rates
under
DP
Barcode
D279921
adjusted
for
seeding
rate
(
values
presented
are
bolded
values
in
Table
1)

Maximum
No.
of
Applications
1
Label
under
DP
Barcode
D279921.

Application
Date
April
1
Assumed
for
all
crops
Application
Interval
(
days)
Not
applicable
Label
under
DP
Barcode
D279921.

Methed
of
Application/
Incorporation
depth
(
cm)
5
Assumed
5
cm
(
2
inches)
for
each
crop
CAM=
4
to
represent
granular
application
Planting
depth
will
vary.
Model
recommends
2
inches
(
5
cm)
for
in­
furrow
application.

Percent
Cropped
Area
(
as
decimal)
0.56
Default
for
wheat
+
corn
Koc
365
Average
Koc
from
4
soils
(
MRID
41616008),
range
of
224­
460
ml/
g
for
parent
triadimenol.

Aerobic
Soil
Metabolic
Half­
life
(
days)
747
r2=
0.99,
F=
2,924,
p=
1.5e­
14
(
MRID's
41686102,
42224104).
Non­
linear
half­
life
of
239
days
*
3
based
on
aerobic
soil
metabolism
study
for
triadimefon
Is
the
pesticide
wetted­
in?
No
Proposed
use
information
in
label
Method
of
application
Granular
Granular
is
closest
option
to
seed
treatment.

Application
efficiency
1.0
100
%
efficiency
Spray
Drift
0
no
drift
assumed
Solubility
(
mg/
L)
64
for
Bayleton,
http://
www.
cdms.
net/
ldat/
mp239005.
pdf
Anaerobic
Aquatic
Metabolic
Halflife
(
days)
2058
Anaerobic
aquatic
metabolism
half­
life
of
686
days
(
r2=
0.99,
F=
873,
p=
4.3e­
10)
(
MRID's
42401201)
times
3.

Aerobic
Aquatic
Metabolic
Half­
life
(
days)
1494
Aerobic
soil
metabolism
half­
lives
multiplied
by
2
in
the
absence
of
data
to
account
for
a
change
in
media.
This
is
standard
guidance
in
surface
water
modeling
(
PRZM­
EXAMS)
when
no
acceptable
aerobic
aquatic
metabolism
data
are
available
and
the
compound
is
stable
to
hydrolysis.

Photolysis
Half­
life
(
days)
1.5
EFGWB
#
295,296;
accepted
3/
29/
83
Page
6
of
16
Hydrolysis
half­
life
(
days)
0
Stable
at
all
pH
values
Molecular
weight
294
grams/
mol
Extoxnet
Vapor
Pressure
(
torr)
7.5e­
7
0.1
mPa
*
7.5
e­
6=
7.7
e­
7
Vapor
pressure
is
<
0.1
mPa
Extoxnet
*
Parameters
were
selected
in
accordance
with
the
Proposed
Interim
Guidance
for
Input
Values
document,
dated
February
28,
2002.

Table
4.
Results
from
SCIGROW
­
Screening
level
in
ground
water
modeling
MODEL
INPUT
VARIABLE
INPUT
VALUE*
COMMENTS
Median
Koc
(
l/
kg)
387
Median
Koc
from
4
soils
(
MRID
41616008),
range
of
224­
460
ml/
g
for
parent
triadimenol.

Application
Rate
(
lbs
ai/
A))
Wheat
(
for
wheat,
barley,
oats,
and
rye)
Corn
Cotton
0.0375
0.011
0.006
Maximum
label
rates
under
DP
Barcode
D3125191
adjusted
for
seeding
rate
(
values
presented
are
bolded
values
in
Table
1)

Maximum
No.
of
Applications
1
Label
under
DP
Barcode
D312519.

Aerobic
Soil
Metabolic
Half­
life
(
days)
747
r2=
0.99,
F=
2,924,
p=
1.5e­
14
(
MRID's
41686102,
42224104).
Non­
linear
half­
life
of
239
days
*
3
based
on
aerobic
soil
metabolism
study
for
triadimefon
Estimated
groundwater
concentration
(
ppt)
Wheat
(
for
wheat,
barley,
oats,
and
rye)
Corn
Cotton
63
18
10
From
model.

*
Parameters
were
selected
in
accordance
with
the
Proposed
Interim
Guidance
for
Input
Values
document,
dated
February
28,
2002.
Page
7
of
16
Appendix
A.
Inputs
and
Outputs
for
PRZM­
EXAMS
Runs
for
Triadimenol
North
Dakota
Wheat
at
0.042
kg
ai/
Ha
(
for
wheat,
barley,
oats,
and
rye)

stored
as
triadnd.
out
Chemical:
triadimenol
PRZM
environment:
NDwheatC.
txt
modified
Satday,
12
October
2002
at
16:
15:
08
EXAMS
environment:
ir298.
exv
modified
Thuday,
29
August
2002
at
14:
34:
12
Metfile:
w14914.
dvf
modified
Wedday,
3
July
2002
at
08:
05:
52
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.237
0.233
0.219
0.193
0.181
0.107
1962
0.272
0.269
0.257
0.238
0.225
0.156
1963
0.370
0.366
0.349
0.321
0.314
0.217
1964
0.471
0.465
0.441
0.398
0.399
0.278
1965
0.642
0.634
0.602
0.545
0.510
0.324
1966
0.300
0.297
0.284
0.263
0.248
0.204
1967
0.377
0.373
0.358
0.331
0.311
0.200
1968
0.433
0.427
0.412
0.383
0.359
0.230
1969
0.709
0.702
0.662
0.593
0.555
0.348
1970
0.599
0.592
0.563
0.524
0.499
0.340
1971
0.289
0.286
0.278
0.260
0.246
0.211
1972
0.352
0.347
0.330
0.296
0.279
0.199
1973
0.162
0.162
0.159
0.153
0.148
0.123
1974
0.413
0.407
0.392
0.364
0.344
0.216
1975
0.323
0.319
0.308
0.287
0.291
0.215
1976
0.162
0.162
0.159
0.153
0.149
0.106
1977
0.998
0.982
0.924
0.830
0.782
0.415
1978
0.403
0.399
0.382
0.353
0.341
0.300
1979
0.770
0.760
0.728
0.660
0.615
0.377
1980
0.300
0.297
0.284
0.270
0.259
0.232
1981
0.365
0.361
0.343
0.313
0.297
0.208
1982
0.166
0.165
0.158
0.151
0.148
0.139
1983
0.191
0.189
0.180
0.170
0.165
0.128
1984
0.292
0.288
0.272
0.242
0.223
0.151
1985
0.428
0.422
0.402
0.380
0.363
0.230
1986
0.610
0.602
0.579
0.537
0.512
0.324
1987
0.284
0.281
0.271
0.251
0.248
0.216
1988
0.259
0.255
0.243
0.219
0.207
0.151
1989
0.600
0.595
0.563
0.508
0.475
0.305
1990
0.314
0.310
0.297
0.285
0.270
0.218
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032
0.998
0.982
0.924
0.830
0.782
0.415
0.065
0.770
0.760
0.728
0.660
0.615
0.377
0.097
0.709
0.702
0.662
0.593
0.555
0.348
Page
8
of
16
0.129
0.642
0.634
0.602
0.545
0.512
0.340
0.161
0.610
0.602
0.579
0.537
0.510
0.324
0.194
0.600
0.595
0.563
0.524
0.499
0.324
0.226
0.599
0.592
0.563
0.508
0.475
0.305
0.258
0.471
0.465
0.441
0.398
0.399
0.300
0.290
0.433
0.427
0.412
0.383
0.363
0.278
0.323
0.428
0.422
0.402
0.380
0.359
0.232
0.355
0.413
0.407
0.392
0.364
0.344
0.230
0.387
0.403
0.399
0.382
0.353
0.341
0.230
0.419
0.377
0.373
0.358
0.331
0.314
0.218
0.452
0.370
0.366
0.349
0.321
0.311
0.217
0.484
0.365
0.361
0.343
0.313
0.297
0.216
0.516
0.352
0.347
0.330
0.296
0.291
0.216
0.548
0.323
0.319
0.308
0.287
0.279
0.215
0.581
0.314
0.310
0.297
0.285
0.270
0.211
0.613
0.300
0.297
0.284
0.270
0.259
0.208
0.645
0.300
0.297
0.284
0.263
0.248
0.204
0.677
0.292
0.288
0.278
0.260
0.248
0.200
0.710
0.289
0.286
0.272
0.251
0.246
0.199
0.742
0.284
0.281
0.271
0.242
0.225
0.156
0.774
0.272
0.269
0.257
0.238
0.223
0.151
0.806
0.259
0.255
0.243
0.219
0.207
0.151
0.839
0.237
0.233
0.219
0.193
0.181
0.139
0.871
0.191
0.189
0.180
0.170
0.165
0.128
0.903
0.166
0.165
0.159
0.153
0.149
0.123
0.935
0.162
0.162
0.159
0.153
0.148
0.107
0.968
0.162
0.162
0.158
0.151
0.148
0.106
EECs
(
ppb)
0.1
0.702
0.695
0.656
0.588
0.550
0.347
Average
of
yearly
averages:
0.229
Adjusted
EECs
(
parts­
per­
trillion,
PCA
adjusted
using
0.56
factor
assuming
corn
and
wheat)
0.1
393
389
367
329
308
194
128
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
triadnd
Metfile:
w14914.
d
vf
PRZM
scenario:
NDwheatC.
txt
EXAMS
environment
file:
ir298.
exv
Chemical
Name:
triadimeno
l
Description
Variable
Name
Value
Units
Comment
s
Molecular
weight
mwt
294
g/
mol
Page
9
of
16
Henry's
Law
Const.
henry
atm­
m^
3/
mol
Vapor
Pressure
vapr
7.50E­
07
torr
Solubility
sol
64
mg/
L
Kd
Kd
mg/
L
Koc
Koc
365
mg/
L
Photolysis
half­
life
kdp
1.5
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
1494
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
2058
days
Halfife
Aerobic
Soil
Metabolism
asm
747
days
Halfife
Hydrolysis:
pH
5
0
days
Half­
life
Hydrolysis:
pH
7
0
days
Half­
life
Hydrolysis:
pH
9
0
days
Half­
life
Method:
CAM
4
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
5
cm
Application
Rate:
TAPP
0.042
kg/
ha
Application
Efficiency:
APPEFF
1
fraction
Spray
Drift
DRFT
0
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
Apr
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
IR
Flag
for
runoff
calc.
RUNOFF
total
none,
monthly
or
total(
average
of
entire
run)

Illinois
corn
at
0.012
kg
ai/
ha
stored
as
ilcorn.
out
Chemical:
triadimenol
PRZM
environment:
ILCornC.
txt
modified
Satday,
12
October
2002
at
16:
01:
38
EXAMS
environment:
ir298.
exv
modified
Thuday,
29
August
2002
at
14:
34:
12
Metfile:
w14923.
dvf
modified
Wedday,
3
July
2002
at
08:
04:
40
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.056
0.054
0.052
0.045
0.041
0.018
1962
0.072
0.070
0.065
0.060
0.058
0.033
1963
0.073
0.071
0.066
0.057
0.051
0.034
1964
0.146
0.143
0.135
0.115
0.106
0.053
1965
0.173
0.170
0.157
0.137
0.124
0.062
1966
0.097
0.095
0.091
0.083
0.076
0.042
Page
10
of
16
1967
0.130
0.128
0.119
0.102
0.091
0.053
1968
0.036
0.036
0.034
0.031
0.030
0.023
1969
0.058
0.057
0.054
0.052
0.049
0.030
1970
0.125
0.122
0.117
0.101
0.090
0.046
1971
0.126
0.123
0.118
0.101
0.090
0.049
1972
0.123
0.120
0.112
0.104
0.100
0.054
1973
0.290
0.283
0.273
0.236
0.210
0.097
1974
0.140
0.137
0.129
0.113
0.106
0.060
1975
0.033
0.033
0.032
0.030
0.030
0.023
1976
0.095
0.093
0.088
0.078
0.071
0.035
1977
0.070
0.069
0.066
0.061
0.055
0.030
1978
0.057
0.055
0.051
0.043
0.039
0.024
1979
0.045
0.044
0.042
0.039
0.037
0.022
1980
0.063
0.061
0.059
0.052
0.048
0.025
1981
0.087
0.085
0.078
0.065
0.060
0.033
1982
0.084
0.082
0.078
0.076
0.072
0.041
1983
0.178
0.174
0.164
0.139
0.124
0.071
1984
0.081
0.080
0.076
0.069
0.066
0.040
1985
0.059
0.058
0.053
0.045
0.041
0.026
1986
0.096
0.094
0.089
0.081
0.076
0.038
1987
0.090
0.088
0.081
0.070
0.063
0.039
1988
0.036
0.035
0.032
0.029
0.027
0.023
1989
0.062
0.061
0.057
0.053
0.051
0.028
1990
0.095
0.094
0.089
0.082
0.075
0.036
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032
0.290
0.283
0.273
0.236
0.210
0.097
0.065
0.178
0.174
0.164
0.139
0.124
0.071
0.097
0.173
0.170
0.157
0.137
0.124
0.062
0.129
0.146
0.143
0.135
0.115
0.106
0.060
0.161
0.140
0.137
0.129
0.113
0.106
0.054
0.194
0.130
0.128
0.119
0.104
0.100
0.053
0.226
0.126
0.123
0.118
0.102
0.091
0.053
0.258
0.125
0.122
0.117
0.101
0.090
0.049
0.290
0.123
0.120
0.112
0.101
0.090
0.046
0.323
0.097
0.095
0.091
0.083
0.076
0.042
0.355
0.096
0.094
0.089
0.082
0.076
0.041
0.387
0.095
0.094
0.089
0.081
0.075
0.040
0.419
0.095
0.093
0.088
0.078
0.072
0.039
0.452
0.090
0.088
0.081
0.076
0.071
0.038
0.484
0.087
0.085
0.078
0.070
0.066
0.036
0.516
0.084
0.082
0.078
0.069
0.063
0.035
0.548
0.081
0.080
0.076
0.065
0.060
0.034
0.581
0.073
0.071
0.066
0.061
0.058
0.033
0.613
0.072
0.070
0.066
0.060
0.055
0.033
0.645
0.070
0.069
0.065
0.057
0.051
0.030
0.677
0.063
0.061
0.059
0.053
0.051
0.030
0.710
0.062
0.061
0.057
0.052
0.049
0.028
0.742
0.059
0.058
0.054
0.052
0.048
0.026
0.774
0.058
0.057
0.053
0.045
0.041
0.025
Page
11
of
16
0.806
0.057
0.055
0.052
0.045
0.041
0.024
0.839
0.056
0.054
0.051
0.043
0.039
0.023
0.871
0.045
0.044
0.042
0.039
0.037
0.023
0.903
0.036
0.036
0.034
0.031
0.030
0.023
0.935
0.036
0.035
0.032
0.030
0.030
0.022
0.968
0.033
0.033
0.032
0.029
0.027
0.018
ppb
0.1
0.170
0.167
0.155
0.134
0.122
0.061
Average
of
yearly
averages:
0.040
PCA
adjusted
EECs
(
parts­
per­
trillion,
adjusted
by
PCA
of
0.56
for
wheat
and
corn)
0.1
95
94
87
75
68
34
22
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
ilcorn
Metfile:
w14923.
d
vf
PRZM
scenario:
ILCornC.
txt
EXAMS
environment
file:
ir298.
exv
Chemical
Name:
triadimeno
l
Description
Variable
Name
Value
Units
Comment
s
Molecular
weight
mwt
294
g/
mol
Henry's
Law
Const.
henry
atm­
m^
3/
mol
Vapor
Pressure
vapr
7.50E­
07
torr
Solubility
sol
64
mg/
L
Kd
Kd
mg/
L
Koc
Koc
365
mg/
L
Photolysis
half­
life
kdp
1.5
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
1494
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
2058
days
Halfife
Aerobic
Soil
Metabolism
asm
747
days
Halfife
Hydrolysis:
pH
5
0
days
Half­
life
Hydrolysis:
pH
7
0
days
Half­
life
Hydrolysis:
pH
9
0
days
Half­
life
Method:
CAM
4
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
5
cm
Application
Rate:
TAPP
0.012
kg/
ha
Application
Efficiency:
APPEFF
1
fraction
Spray
Drift
DRFT
0
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
Apr
dd/
mm
or
dd/
mmm
or
dd­
mm
or
dd­
mmm
Record
17:
FILTRA
Page
12
of
16
IPSCND
1
UPTKF
Record
18:
PLVKRT
PLDKRT
FEXTRC
0.5
Flag
for
Index
Res.
Run
IR
IR
Flag
for
runoff
calc.
RUNOFF
total
none,
monthly
or
total(
average
of
entire
run)

Mississippi
Cotton
at
0.007
kg
ai/
ha
stored
as
mscotn.
out
Chemical:
triadimenol
PRZM
environment:
MScottonC.
txt
modified
Wedday,
22
January
2003
at
10:
52:
38
EXAMS
environment:
ir298.
exv
modified
Thuday,
29
August
2002
at
14:
34:
12
Metfile:
w03940.
dvf
modified
Wedday,
3
July
2002
at
08:
05:
46
Water
segment
concentrations
(
ppb)

Year
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
1961
0.135
0.130
0.112
0.101
0.098
0.044
1962
0.243
0.234
0.208
0.159
0.133
0.048
1963
0.038
0.037
0.032
0.024
0.020
0.011
1964
0.091
0.087
0.081
0.067
0.057
0.021
1965
0.021
0.020
0.017
0.013
0.011
0.006
1966
0.049
0.048
0.043
0.037
0.032
0.012
1967
0.166
0.160
0.143
0.127
0.111
0.040
1968
0.128
0.124
0.109
0.100
0.086
0.032
1969
0.102
0.098
0.084
0.062
0.051
0.019
1970
0.036
0.034
0.029
0.026
0.023
0.013
1971
0.171
0.164
0.153
0.127
0.106
0.037
1972
0.024
0.024
0.023
0.018
0.015
0.007
1973
0.114
0.110
0.096
0.079
0.065
0.023
1974
0.184
0.177
0.166
0.129
0.108
0.038
1975
0.041
0.040
0.036
0.028
0.024
0.010
1976
0.127
0.122
0.111
0.095
0.083
0.031
1977
0.178
0.171
0.151
0.129
0.109
0.041
1978
0.035
0.034
0.033
0.026
0.022
0.010
1979
0.170
0.164
0.141
0.113
0.095
0.035
1980
0.369
0.355
0.325
0.255
0.210
0.071
1981
0.041
0.039
0.037
0.032
0.028
0.013
1982
0.078
0.075
0.067
0.056
0.054
0.025
1983
0.417
0.401
0.353
0.280
0.235
0.081
1984
0.031
0.030
0.026
0.022
0.020
0.011
1985
0.039
0.037
0.032
0.026
0.023
0.010
1986
0.056
0.054
0.047
0.036
0.030
0.012
1987
0.022
0.021
0.019
0.014
0.013
0.006
1988
0.067
0.065
0.055
0.049
0.041
0.021
1989
0.080
0.077
0.069
0.060
0.051
0.021
Page
13
of
16
1990
0.042
0.040
0.035
0.028
0.024
0.009
Sorted
results
Prob.
Peak
96
hr
21
Day
60
Day
90
Day
Yearly
0.032
0.417
0.401
0.353
0.280
0.235
0.081
0.065
0.369
0.355
0.325
0.255
0.210
0.071
0.097
0.243
0.234
0.208
0.159
0.133
0.048
0.129
0.184
0.177
0.166
0.129
0.111
0.044
0.161
0.178
0.171
0.153
0.129
0.109
0.041
0.194
0.171
0.164
0.151
0.127
0.108
0.040
0.226
0.170
0.164
0.143
0.127
0.106
0.038
0.258
0.166
0.160
0.141
0.113
0.098
0.037
0.290
0.135
0.130
0.112
0.101
0.095
0.035
0.323
0.128
0.124
0.111
0.100
0.086
0.032
0.355
0.127
0.122
0.109
0.095
0.083
0.031
0.387
0.114
0.110
0.096
0.079
0.065
0.025
0.419
0.102
0.098
0.084
0.067
0.057
0.023
0.452
0.091
0.087
0.081
0.062
0.054
0.021
0.484
0.080
0.077
0.069
0.060
0.051
0.021
0.516
0.078
0.075
0.067
0.056
0.051
0.021
0.548
0.067
0.065
0.055
0.049
0.041
0.019
0.581
0.056
0.054
0.047
0.037
0.032
0.013
0.613
0.049
0.048
0.043
0.036
0.030
0.013
0.645
0.042
0.040
0.037
0.032
0.028
0.012
0.677
0.041
0.040
0.036
0.028
0.024
0.012
0.710
0.041
0.039
0.035
0.028
0.024
0.011
0.742
0.039
0.037
0.033
0.026
0.023
0.011
0.774
0.038
0.037
0.032
0.026
0.023
0.010
0.806
0.036
0.034
0.032
0.026
0.022
0.010
0.839
0.035
0.034
0.029
0.024
0.020
0.010
0.871
0.031
0.030
0.026
0.022
0.020
0.009
0.903
0.024
0.024
0.023
0.018
0.015
0.007
0.935
0.022
0.021
0.019
0.014
0.013
0.006
0.968
0.021
0.020
0.017
0.013
0.011
0.006
EECs
(
ppb)
0.1
0.237
0.228
0.203
0.156
0.131
0.048
Average
of
yearly
averages:
0.025
Adjusted
EECs
(
parts­
per­
trillion,
using
PCA
factor
of
0.56
for
wheat
and
corn)
0.1
133
128
114
87
73
27
14
Inputs
generated
by
pe4.
pl
­
8­
August­
2003
Data
used
for
this
run:
Output
File:
mscotn
Metfile:
w03940.
d
vf
PRZM
scenario:
MScottonC.
txt
Page
14
of
16
EXAMS
environment
file:
ir298.
exv
Chemical
Name:
triadimeno
l
Description
Variable
Name
Value
Units
Comment
s
Molecular
weight
mwt
294
g/
mol
Henry's
Law
Const.
henry
atm­
m^
3/
mol
Vapor
Pressure
vapr
7.50E­
07
torr
Solubility
sol
64
mg/
L
Kd
Kd
mg/
L
Koc
Koc
365
mg/
L
Photolysis
half­
life
kdp
1.5
days
Half­
life
Aerobic
Aquatic
Metabolism
kbacw
1494
days
Halfife
Anaerobic
Aquatic
Metabolism
kbacs
2058
days
Halfife
Aerobic
Soil
Metabolism
asm
747
days
Halfife
Hydrolysis:
pH
5
0
days
Half­
life
Hydrolysis:
pH
7
0
days
Half­
life
Hydrolysis:
pH
9
0
days
Half­
life
Method:
CAM
4
integer
See
PRZM
manual
Incorporation
Depth:
DEPI
5
cm
Application
Rate:
TAPP
0.007
kg/
ha
Application
Efficiency:
APPEFF
1
fraction
Spray
Drift
DRFT
0
fraction
of
application
rate
applied
to
pond
Application
Date
Date
1­
Apr
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
IR
Flag
for
runoff
calc.
RUNOFF
total
none,
monthly
or
total(
average
of
entire
run)
Page
15
of
16
Appendix
B.
Inputs
and
Outputs
for
SCI­
GROW2
Runs
for
Triadimenol
Wheat,
barley,
oats,
and
rye
VERSION
2.3
ENVIRONMENTAL
FATE
AND
EFFECTS
DIVISION
OFFICE
OF
PESTICIDE
PROGRAMS
U.
S.
ENVIRONMENTAL
PROTECTION
AGENCY
SCREENING
MODEL
FOR
AQUATIC
PESTICIDE
EXPOSURE
SciGrow
version
2.3
chemical:
triadimenol
time
is
2/
1/
2005
8:
49:
44
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Application
Number
of
Total
Use
Koc
Soil
Aerobic
rate
(
lb/
acre)
applications
(
lb/
acre/
yr)
(
ml/
g)
metabolism
(
days)
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
0.038
1.0
0.038
3.87E+
02
747.0
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
groundwater
screening
cond
(
ppb)
=
6.25E­
02
PPTr=
63
Corn
SciGrow
version
2.3
chemical:
triadimenol
time
is
2/
1/
2005
8:
50:
29
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Application
Number
of
Total
Use
Koc
Soil
Aerobic
rate
(
lb/
acre)
applications
(
lb/
acre/
yr)
(
ml/
g)
metabolism
(
days)
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
0.011
1.0
0.011
3.87E+
02
747.0
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
groundwater
screening
cond
(
ppb)
=
1.83E­
02
PPTr
=
18
Page
16
of
16
Cotton
SciGrow
version
2.3
chemical:
triadimenol
time
is
2/
1/
2005
8:
51:
14
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Application
Number
of
Total
Use
Koc
Soil
Aerobic
rate
(
lb/
acre)
applications
(
lb/
acre/
yr)
(
ml/
g)
metabolism
(
days)
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
0.006
1.0
0.006
3.87E+
02
747.0
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
groundwater
screening
cond
(
ppb)
=
1.00E­
02
PPTr
=
10