Document ID: EPA-HQ-OPP-2004-0167-0008
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-05-20T04:00Z

Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Date:
05/
20/
04
Assessor:
TD
Crops
Applicable
TC
Groups
Spreadsheet
Number
Cereal
Grains
Field
Row/
Low
Medium
D1
Corn,
Field
Field
Row/
Tall
D2
Corn,
Sweet
Field
Row/
Tall
D3
Potato
Vegetable/
Root
D4
Rice
Field
Row/
Low
Medium
D5
Sorghum
Field
Row/
Tall
D6
Sugarcane
Sugarcane
D7
Turf/
Sod
(
California)
Turf
D8
Turf/
Sod
(
North
Carolina)
Turf
D9
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):
15
Source
of
NOAEL:
Oral
Adult
Exposure
Duration
(
hrs/
day):
8
Adult
Body
Weight
(
kg):
70
Dermal
Abs.
(%):
5.8
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D1
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
low/
medium
Specific
Crop(
s)
Considered:
Cereal
Grains
Application
Rate
of
Crop
(
lb
ae/
A):
0.5
Application
Rate
Source:
2001
QUA
Report
for
barley,
oats,
rye
and
wheat
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):
0.5
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,
immature/
low
foliage
plants
Medium
1500
486
to
2760
Irrigation,
scouting,
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
1.122
1.122
0.0007
0.0112
20171
1345
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D2
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
tall
Specific
Crop(
s)
Considered:
Field
Corn
Application
Rate
of
Crop
(
lb
ae/
A):
0.44
Application
Rate
Source:
2001
QUA
Report
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):
0.44
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
0.987
0.987
0.0007
0.0026
0.0065
22921
5730
2292
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D3
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
tall
Specific
Crop(
s)
Considered:
Sweet
Corn
Application
Rate
of
Crop
(
lb
ae/
A):
0.48
Application
Rate
Source:
2001
QUA
Report
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
1.077
1.034
0.0007
0.0027
21887
5472
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D4
Chemical:
2,4­
D
Reason:
Intermediate
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
0.0003
0.0016
48025
9605
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D5
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
low/
medium
Specific
Crop(
s)
Considered:
Rice
Application
Rate
of
Crop
(
lb
ae/
A):
0.92
Application
Rate
Source:
2001
QUA
Report
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):
0.92
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,
immature/
low
foliage
plants
Medium
1500
486
to
2760
Irrigation,
scouting,
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
2.064
2.064
0.0014
0.0205
10962
731
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D6
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Transfer
Coefficient
Group:
Field/
row
crop,
tall
Specific
Crop(
s)
Considered:
Sorghum
Application
Rate
of
Crop
(
lb
ae/
A):
0.46
Application
Rate
Source:
2001
QUA
Report
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):
0.46
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
1.032
1.032
0.0007
0.0027
21925
5481
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D7
Chemical:
2,4­
D
Reason:
Intermediate
Term
Exposure
Transfer
Coefficient
Group:
Sugarcane
Specific
Crop(
s)
Considered:
Sugarcane
Application
Rate
of
Crop
(
lb
ae/
A):
0.75
Application
Rate
Source:
2001
QUA
Report
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):
0.75
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
1.683
1.683
0.0112
0.0223
1345
672
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D8
Chemical:
2,4­
D
Reason:
Intermediate
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
Application
Rate
Source:
Master
Label
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)
­
0.369
[
Initial]
(
ug/
cm2):
(
NC­
1
DMA
TTR
Data)
0.197
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
0.197
0.237
0.005
0.011
2804
1402
Appendix
D
­
Occupational
Post­
Application
Risks
of
2,4­
D
Intermediate
Term
Exposures
Spreadsheet
D9
Chemical:
2,4­
D
Reason:
Intermediate
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
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
0.014
0.029
1044
522