1

U. S. ENVIRONMENTAL PROTECTION AGENCY

Washington, D.C. 20460

 OFFICE OF 

CHEMICAL SAFETY AND

POLLUTION PREVENTION

Date: July 19, 2011

PC Code: 128711

DP Barcode: DP 384661

Decision: 441518

MEMORANDUM

SUBJECT: Drinking Water Exposure for Quizalofop-P-Ethyl in Support of Propagation of 

Herbicide-tolerant Field Corn and Sorghum

TO: Laura Nollen, Risk Manager Reviewer

Barbara Madden, Risk Manager

Registration Division (7505C) 

FROM: Stephen P. Wente, Biologist

Environmental Risk Branch I

Environmental Fate and Effects Division (7504P)

THRU: Nancy Andrews, Branch Chief 

Sujatha Sankula, Lead Biologist

Environmental Risk Branch I

Environmental Fate and Effects Division (7504P)

I. Exposure Summary

A Tier II drinking water assessment of surface water was performed to assess drinking water 

exposure for quizalofop-p-ethyl in support of propagation of herbicide-tolerant field corn and 

sorghum. (A rapeseed use that appears on the sorghum supplemental label was previously 

assessed under DP 310868 on 10/25/2005.) The PRZM/EXAMS simulations of several corn 

scenarios and a sorghum scenario produced the highest estimated drinking water concentrations 

(EDWC) of 6.5 μg/L for acute exposure, 2.0 μg/L for chronic exposure, and 1.3 μg/L for longterm cancer exposure from MS corn scenario (Table 4). These values are higher than the 

previously predicted EDWCs of 5.25 μg/L for acute exposure, 1.99 μg/L for chronic exposure, 

and 1.34 μg/L for long-term cancer exposure. Additionally, the Tier 1 drinking water predicted 

EDWC of 1.29 μg/L for both acute and chronic exposure is higher than the previous highest 

EDWC of 0.15 μg/L for ground water. Therefore, the previous EDWCs should be updated 

for surface drinking water and groundwater drinking water exposure assessment purposes.
2

II. Proposed Use Information

The national-scale quizalofop-p-ethyl use information can be found from the web site of 

National Pesticide Synthesis Program (NPSP) of the U.S. Geological Survey at:

http://water.usgs.gov/nawqa/pnsp/usage/maps/show_map.php?year=02&map=m7006 (shown 

here as Figure 1.

Figure 1. National-scale quizalofop-p-ethyl usage in 2002 as estimated by U.S. Geological Survey procedures.

This drinking water exposure assessment addresses use of quizalofop-p-ethyl on corn to produce 

herbicide-tolerant field corn seed as described on the proposed Assure® II label (EPA Reg. No. 

352-541). This is a liquid herbicide applied as a foliar spray to control certain grassy weeds in 

field com containing DAS-40278-9 and selectively eliminates plants that do not carry a gene that 

imparts tolerance to quizalofop-p-ethyl herbicides used for propagation, breeding, and 

production. Assure® II may be applied to remove susceptible “segregates” (i.e., com plants that 

do not contain the quizalofop-p-ethyl tolerance trait) during seed propagation. According to the 

proposed label quizalofop-p-ethyl is applied at a rate 0.034 to 0.083 lbs a.i./A, not exceed two 

applications for total annual application rate of 0.083 lbs a.i./A.
3

III. Water Resources Summary

No monitoring data was located during a search of the NAWQA data warehouse for quizalofopp-ethyl or quizalofop-ethyl. Therefore, only model-generated EDWCs will be used in this 

drinking water assessment.

Surface Water Sources

The estimated drinking water concentrations from surface water sources were calculated using 

Tier II models PRZM (Pesticide Root Zone Model) and EXAMS (Exposure Analysis Modeling 

System). PRZM is used to simulate pesticide transport as the result of runoff and erosion from an 

agricultural field. EXAMS is used to estimate environmental fate and transport of pesticides in 

the receiving water bodies. A fraction of the application amount is added as spray drift loading to 

the receiving water bodies. The magnitude of the drift loading is dependent on the method of 

application. The current EFED approach is to use the linkage program – PE5V01, which

incorporates the standard scenarios developed by EFED.

For drinking water purposes, the index reservoir is simulated. The index reservoir is based on a 

172.8 ha watershed draining into a 5.3 ha reservoir with a depth of 2.74 m. A single steady flow 

is used to represent the flow through the reservoir. The index reservoir scenario uses the 

characteristics of a single soil to represent the soil in the watershed. Weather and agricultural 

practices are simulated over 30 years so that the 1-in10 year exceedence probability at the site 

can be estimated. The values generated by the models for drinking water were multiplied by a 

crop area factor (PCA), which accounts for the fact that it is unlikely for any basin to be 

completely planted to agricultural crops. Currently, EFED uses a default PCA of 0.87 for the 

combination of crops to which quizalofop-p-ethyl can be applied.

Ground Water Sources

The estimated drinking water concentrations from ground water sources were calculated using 

the Tier I SCIGROW (Screening Concentration In Ground Water) model. It is a regression 

approach model, based on the results of several prospective ground water monitoring studies. 

SCIGROW was developed using Koc values ranging from 32 - 180 ml/g and half-lives from 13 -

1000 days. Extrapolation beyond these values will increase the uncertainty of the predicted 

ground water concentrations.

For further information on these models see,

http://www.epa.gov/oppefed1/models/water/index.htm

The model inputs for PRZM/EXAMS and SCIGROW are presented below. These input 

selections are based on the Guidance for Selecting Input Parameters in Modeling the 

Environmental Fate and Transport of Pesticides, Version 2.1 (October 22, 2009). 
4

Scenario Description

The model scenarios are only applicable to surface water models PRZM/EXAMS. (The ground 

water model, SCIGROW, is site independent.) Standard corn scenarios are available for Illinois 

Mississippi, North Carolina, Ohio, and Pennsylvania. A single standard scenario, Kansas, is 

available for sorghum. The proposed label recommends applying quizalofop-p-ethyl on corn that 

is at the V2 through V6 stage of development, approximately 1 to 3 weeks after the emergence 

date. Sorghum applications can occur between emergence and 45 days before harvest. Therefore 

the quizalofop-p-ethyl application date was chosen to be 2 weeks after the scenario emergence 

date for corn and within the appropriate interval for sorghum. The specific modeling scenario 

information, such as Major Land Resource Region, meteorological file, soil, and crop 

emergence, application dates, is presented in Table 1.

Table 1. Corn scenarios employed in this assessment.

Scenario Crop Region, Met File and Soil Info

Crop Development 

Event Application Date

Corn

Illinois MLRA: 108, McLean Co., IL

Metfile: W14842, Soil: Adair Clay Loam 5/1 (emergence date) 5/15 (2 weeks after emergence)

Mississippi MLRA: 134, Southern MS Valley Uplands

Metfile: W03940, Soil: Grenada Silt Loam 4/10 (emergence date) 4/24 (2 weeks after emergence)

North Carolina MLRA: 153A, Pitt Co., NC

Metfile: W13722, Soil: Craven silt loam 4/15 (emergence date) 4/29 (2 weeks after emergence)

Ohio MLRA: 111, Darke and Rickaway Co., OH

Metfile: W93815, Soil: Cardington Silt Loam 5/1 (emergence date) 5/15 (2 weeks after emergence)

Pennsylvania MLRA: 148, Lancaster Co.

Metfile: W14751, Soil: Hagerstown Silt Loam 4/16 (emergence date) 4/30 (2 weeks after emergence)

Sorghum

Kansas MLRA: M106, Brown County, KS

Metfile: W13996, Soil: Wymore silty clay loam 10/20 (harvest date) 8/15 (at least 45 days before harvest)

MLRA: Major Land Resource Area; Metfile: the meteorological file used in the simulation.

Model Inputs

Based on the fact that quizalofop-p-ethyl degrades quickly with a half-life of 1 day in laboratory

studies, the major aquatic exposure concern would be the quizalofop acid degradate. A total 

toxics residue (TTR) approach was used to estimate EDWCs based on both the parent and 

quizalofop acid degradate. No Residue of Concern Knowledge-Based Sub Committee (ROCKS)

decision memo was located. Therefore, the choice of chemicals included in the TTR approach 

was based on the chemicals included in previous drinking water assessments (parent and 

quizalofop acid degradate only). Structures of the parent, degradate of concern, and other 

degradates identified in the fate studies appear in Appendix A. The following assumptions have 

been made in order to provide the exposure values for screening purposes:

1. Quizalofop-p-ethyl is completely and rapidly converted to quizalofop acid.

2. Quizalofop acid does not degrade by hydrolysis.

3. The solubility of quizalofop acid is assumed the same as the parent.
5

The physical/chemical input parameters for PRZM and EXAMS appear in Table 2.

Table 2. Physical/chemical PRZM and EXAMS input parameters.

Model Parameter Value Comments

Molecular Weight 344.8 Quizalofop Acid

Water Solubility 0.4 mg/l Parent quizalofop-p-ethyl

Vapor Pressure 3 x 10-7 torr (mm Hg) Parent quizalofop-p-ethyl

Spray Drift 6.4% Ground application only

Aerobic Soil Metabolism t1⁄2 407 days Combined parent, quizalofop-acid, and bound residues 

(Ascn # 146697 and MRID 43235603)

Anaerobic Soil Metabolism t1⁄2 Stable Ascn # 146696 is unacceptable.

Aerobic Aquatic Degradation t1⁄2 814 days 2 × aerobic soil metabolism t1⁄2

Anaerobic Aquatic Degradation t1⁄2 420 days Combined parent, quizalofop-acid, and bound residues 

(Ascn # 146697)

Aqueous Photolysis t1⁄2 85.4 days Combined parent and quizalofop-acid (Ascn # 

146693)

Hydrolysis t1⁄2 Stable Combined parent and quizalofop-acid (No MRID 

located – based on DER only)

Kd/Koc 256 ml/g Mean quizalofop-acid Koc (136, 90, 372, 425) (Ascn # 

146947)

The chemical input parameters for SCIGROW are tabulated in Table 3.

Table 3. Physical/Chemical Input Parameters for SCI-GROW.

Model Parameter Value Comments

Application Rate Corn: 0.0825 lbs a.i./A

Sorghum : 0.1375 lbs a.i./A

Maximum seasonal rate for corn and sorghum use

Aerobic Soil Metabolism t1⁄2 407 days Combined parent, quizalofop-acid, and bound residues 

(Ascn # 146697 and MRID 43235603)

Partition coefficient - Koc 90 ml/g Mean quizalofop-acid Koc (136, 90, 372, 425)

IV. Results

For surface water sources, the estimated drinking water concentrations are presented in Table 4.

The values shown have been adjusted with the 0.87 (national-scale default) PCA value because 

quizalofop-p-ethyl is used on other crops in addition to the corn and sorghum uses considered in 

this assessment. The outputs of PE5 runs are presented in Appendix B.

Table 4. Estimated drinking water concentrations (EDWC) from surface water sources adjusted with 87% 

PCA (percent cropped area).

State 

1-in-10 yr

Peak (μg/L)

1-in-10 yr

Annual Mean (μg/L)

Overall 

Annual Mean (μg/L)

Corn

Illinois 2.051 0.771 0.610

Mississippi 3.526 0.720 0.397

North Carolina 1.523 0.486 0.357

Ohio 2.690 1.093 0.565

Pennsylvania 2.041 0.715 0.488

Sorghum

Kansas 6.509 2.006 1.306
6

For ground water sources, the highest SCI-GROW estimated drinking water concentration is 

1.29 μg/L (sorghum scenario) and is assumed to be representative for both acute and chronic 

purposes. The SCI-GROW output is also included in Appendix B.
7

Appendix A – Chemical Structures of Parent and Degradates

Table A. Chemical Names and Structures of Quizalofop-p-ethyl and its Degradates.

Chemical Name Structure

Quizalofop-p-ethyl

IUPAC name: ethyl (R)-2-[4-(6-

chloroquinoxalin-2-

yloxy)phenoxy]propionate

CAS name: ethyl (2R)-2-[4-[(6-

chloro-2-

quinoxalinyl)oxy]phenoxy]propanoate

Quizalofop acid

IUPAC name: (RS)-2-[4-(6-

chloroquinoxalin-2-

yloxy)phenoxy]propionic acid

CAS name: 2-[4-[(6-chloro-2-

quinoxalinyl)oxy]phenoxy]propanoic 

acid

3-OH-quizalofop acid

CAS name: (R)-2-[4-(6-chloro-3-

hydroxyquinoxalin-2-

yloxy)phenoxy]propionic acid

Phenol 1

Hydroxylated Phenol 1

Phenol 2

N

N

Cl

O

O C

H

CH3

C

O

O C

H2

CH3

N

N

Cl

O

O C

H

CH3

C

O

OH

N

N

Cl

O

O C

H

CH3

C

O

OH

HO

N

N

Cl

O

OH

N

N

Cl

O

OH

HO

N

N

Cl

OH
8

Chemical Name Structure

hydroxy phenol 2

CAS name: 6-chloroquinoxaline-2,3-

diol

Phenol 3

Phenol 4

N

N

Cl

OH

HO

HO

O C

H

CH3

C

O

O C

H2

CH3

HO

O C

H

CH3

C

O

OH
9

Appendix B – PE5 (surface water) and SCI-GROW (ground water) outputs

Surface Water

Corn

Illinois

stored as Quiz.out

Chemical: Quizalofop

PRZM environment: ILCornSTD.txt modified Tueday, 29 May 2007 at 13:55:34

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 06:14:08

Metfile: w14842.dvf modified Tueday, 26 August 2008 at 06:15:08

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 1.473 1.444 1.346 1.171 1.108 0.4749

1962 1.91 1.876 1.796 1.67 1.543 0.824

1963 1.499 1.47 1.406 1.26 1.156 0.6985

1964 1.926 1.893 1.753 1.477 1.365 0.76

1965 0.882 0.8666 0.8319 0.7889 0.7643 0.597

1966 1.643 1.613 1.535 1.351 1.256 0.7639

1967 1.338 1.313 1.24 1.087 0.994 0.6387

1968 3.556 3.491 3.29 2.925 2.875 1.407

1969 1.586 1.556 1.484 1.336 1.216 0.8

1970 1.449 1.421 1.323 1.236 1.206 0.6864

1971 1.607 1.577 1.503 1.36 1.242 0.688

1972 1.398 1.372 1.305 1.196 1.1 0.6202

1973 1.139 1.117 1.072 0.9658 0.8747 0.4944

1974 1.986 1.949 1.809 1.67 1.568 0.7574

1975 1.422 1.396 1.352 1.265 1.225 0.6786

1976 1.897 1.86 1.717 1.572 1.443 0.7898

1977 1.499 1.48 1.389 1.195 1.076 0.6294

1978 1.594 1.565 1.452 1.33 1.272 0.7074

1979 1.146 1.124 1.037 0.8771 0.7936 0.4919

1980 4.787 4.689 4.358 3.686 3.287 1.432

1981 1.427 1.401 1.333 1.292 1.2 0.7937

1982 1.894 1.859 1.766 1.618 1.479 0.8195

1983 0.9203 0.903 0.8533 0.7665 0.7062 0.4905

1984 1.754 1.727 1.661 1.518 1.388 0.6672

1985 0.9101 0.8963 0.865 0.7655 0.6992 0.4367

1986 2.399 2.353 2.195 2.04 1.863 0.8927

1987 1.482 1.454 1.343 1.15 1.114 0.6732

1988 0.4989 0.4901 0.4671 0.4205 0.4169 0.3298

1989 0.4327 0.4279 0.4087 0.3722 0.3647 0.2855

1990 1.892 1.855 1.739 1.555 1.461 0.6951

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.032258064516129 4.787 4.689 4.358 3.686 3.287 1.432

0.0645161290322581 3.556 3.491 3.29 2.925 2.875 1.407

0.0967741935483871 2.399 2.353 2.195 2.04 1.863 0.8927

0.129032258064516 1.986 1.949 1.809 1.67 1.568 0.824

0.161290322580645 1.926 1.893 1.796 1.67 1.543 0.8195

0.193548387096774 1.91 1.876 1.766 1.618 1.479 0.8

0.225806451612903 1.897 1.86 1.753 1.572 1.461 0.7937

0.258064516129032 1.894 1.859 1.739 1.555 1.443 0.7898

0.290322580645161 1.892 1.855 1.717 1.518 1.388 0.7639

0.32258064516129 1.754 1.727 1.661 1.477 1.365 0.76

0.354838709677419 1.643 1.613 1.535 1.36 1.272 0.7574

0.387096774193548 1.607 1.577 1.503 1.351 1.256 0.7074
10

0.419354838709677 1.594 1.565 1.484 1.336 1.242 0.6985

0.451612903225806 1.586 1.556 1.452 1.33 1.225 0.6951

0.483870967741936 1.499 1.48 1.406 1.292 1.216 0.688

0.516129032258065 1.499 1.47 1.389 1.265 1.206 0.6864

0.548387096774194 1.482 1.454 1.352 1.26 1.2 0.6786

0.580645161290323 1.473 1.444 1.346 1.236 1.156 0.6732

0.612903225806452 1.449 1.421 1.343 1.196 1.114 0.6672

0.645161290322581 1.427 1.401 1.333 1.195 1.108 0.6387

0.67741935483871 1.422 1.396 1.323 1.171 1.1 0.6294

0.709677419354839 1.398 1.372 1.305 1.15 1.076 0.6202

0.741935483870968 1.338 1.313 1.24 1.087 0.994 0.597

0.774193548387097 1.146 1.124 1.072 0.9658 0.8747 0.4944

0.806451612903226 1.139 1.117 1.037 0.8771 0.7936 0.4919

0.838709677419355 0.9203 0.903 0.865 0.7889 0.7643 0.4905

0.870967741935484 0.9101 0.8963 0.8533 0.7665 0.7062 0.4749

0.903225806451613 0.882 0.8666 0.8319 0.7655 0.6992 0.4367

0.935483870967742 0.4989 0.4901 0.4671 0.4205 0.4169 0.3298

0.967741935483871 0.4327 0.4279 0.4087 0.3722 0.3647 0.2855

0.1 2.3577 2.3126 2.1564 2.003 1.8335 0.88583

Average of yearly averages: 0.70078

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: Quiz

Metfile: w14842.dvf

PRZM scenario: ILCornSTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Quizalofop

Description Variable Name Value Units Comments

Molecular weight mwt 344.8 g/mol

Henry's Law Const.henry atm-m^3/mol

Vapor Pressure vapr 3e-7 torr

Solubilitysol 0.4 mg/L

Kd Kd mg/L

Koc Koc 256 mg/L

Photolysis half-life kdp 85.4 days Half-life

Aerobic Aquatic Metabolism kbacw 814 days Halfife

Anaerobic Aquatic Metabolism kbacs 420 days Halfife

Aerobic Soil Metabolism asm 407 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP .092 kg/ha

Application Efficiency: APPEFF .99 fraction

Spray Drift DRFT .064 fraction of application rate applied to pond

Application Date Date 15-05 dd/mm or dd/mmm or dd-mm or dd-mmm

Record 17: FILTRA

IPSCND 1

UPTKF

Record 18: PLVKRT

PLDKRT

FEXTRC0.5

Flag for Index Res. Run IR Reservoir

Flag for runoff calc. RUNOFFtotal none, monthly or total(average of entire run)

Mississippi

stored as Quiz.out
11

Chemical: Quizalofop

PRZM environment: MScornSTD.txt modified Tueday, 29 May 2007 at 13:57:40

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 06:14:08

Metfile: w03940.dvf modified Tueday, 26 August 2008 at 06:14:14

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 1.475 1.42 1.216 0.9728 0.8375 0.2852

1962 1.196 1.151 1.034 0.8091 0.6733 0.2374

1963 1.743 1.678 1.438 1.136 0.9668 0.3944

1964 4.065 3.91 3.343 2.508 2.074 0.6933

1965 0.2542 0.2453 0.212 0.1777 0.1683 0.0991

1966 2.605 2.535 2.261 1.791 1.554 0.5271

1967 4.698 4.548 4.054 3.161 2.618 0.8693

1968 2.095 2.039 1.811 1.497 1.245 0.4363

1969 0.3745 0.3609 0.3105 0.2827 0.287 0.1396

1970 1.516 1.459 1.25 1.004 0.8416 0.2957

1971 3.072 2.958 2.596 2.049 1.709 0.5704

1972 2.075 2.017 1.938 1.495 1.231 0.4223

1973 1.313 1.264 1.11 0.8825 0.7497 0.2626

1974 1.101 1.06 0.9077 0.6656 0.5798 0.2243

1975 3.221 3.106 2.757 2.136 1.751 0.5731

1976 2.363 2.275 2.05 1.647 1.373 0.484

1977 0.9877 0.9557 0.8536 0.7211 0.6873 0.2804

1978 2.232 2.149 2.031 1.547 1.275 0.4352

1979 3.808 3.672 3.39 2.798 2.401 0.8297

1980 3.598 3.468 3.205 2.756 2.3 0.786

1981 2.304 2.217 2.029 1.558 1.283 0.4506

1982 1.871 1.801 1.563 1.191 1.029 0.4279

1983 5.582 5.408 4.677 3.545 2.908 0.9571

1984 2.033 1.957 1.716 1.355 1.132 0.4132

1985 0.4445 0.4284 0.3784 0.3463 0.3163 0.1589

1986 2.477 2.384 2.127 1.631 1.355 0.4528

1987 1.418 1.365 1.201 0.9942 0.8794 0.3233

1988 0.8136 0.7833 0.6858 0.5568 0.5303 0.2286

1989 3.946 3.827 3.573 2.907 2.407 0.807

1990 3.129 3.014 2.628 2.153 1.825 0.6357

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.032258064516129 5.582 5.408 4.677 3.545 2.908 0.9571

0.0645161290322581 4.698 4.548 4.054 3.161 2.618 0.8693

0.0967741935483871 4.065 3.91 3.573 2.907 2.407 0.8297

0.129032258064516 3.946 3.827 3.39 2.798 2.401 0.807

0.161290322580645 3.808 3.672 3.343 2.756 2.3 0.786

0.193548387096774 3.598 3.468 3.205 2.508 2.074 0.6933

0.225806451612903 3.221 3.106 2.757 2.153 1.825 0.6357

0.258064516129032 3.129 3.014 2.628 2.136 1.751 0.5731

0.290322580645161 3.072 2.958 2.596 2.049 1.709 0.5704

0.32258064516129 2.605 2.535 2.261 1.791 1.554 0.5271

0.354838709677419 2.477 2.384 2.127 1.647 1.373 0.484

0.387096774193548 2.363 2.275 2.05 1.631 1.355 0.4528

0.419354838709677 2.304 2.217 2.031 1.558 1.283 0.4506

0.451612903225806 2.232 2.149 2.029 1.547 1.275 0.4363

0.483870967741936 2.095 2.039 1.938 1.497 1.245 0.4352

0.516129032258065 2.075 2.017 1.811 1.495 1.231 0.4279

0.548387096774194 2.033 1.957 1.716 1.355 1.132 0.4223

0.580645161290323 1.871 1.801 1.563 1.191 1.029 0.4132

0.612903225806452 1.743 1.678 1.438 1.136 0.9668 0.3944

0.645161290322581 1.516 1.459 1.25 1.004 0.8794 0.3233

0.67741935483871 1.475 1.42 1.216 0.9942 0.8416 0.2957
12

0.709677419354839 1.418 1.365 1.201 0.9728 0.8375 0.2852

0.741935483870968 1.313 1.264 1.11 0.8825 0.7497 0.2804

0.774193548387097 1.196 1.151 1.034 0.8091 0.6873 0.2626

0.806451612903226 1.101 1.06 0.9077 0.7211 0.6733 0.2374

0.838709677419355 0.9877 0.9557 0.8536 0.6656 0.5798 0.2286

0.870967741935484 0.8136 0.7833 0.6858 0.5568 0.5303 0.2243

0.903225806451613 0.4445 0.4284 0.3784 0.3463 0.3163 0.1589

0.935483870967742 0.3745 0.3609 0.3105 0.2827 0.287 0.1396

0.967741935483871 0.2542 0.2453 0.212 0.1777 0.1683 0.0991

0.1 4.0531 3.9017 3.5547 2.8961 2.4064 0.82743

Average of yearly averages: 0.456683333333333

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: Quiz

Metfile: w03940.dvf

PRZM scenario: MScornSTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Quizalofop

Description Variable Name Value Units Comments

Molecular weight mwt 344.8 g/mol

Henry's Law Const.henry atm-m^3/mol

Vapor Pressure vapr 3e-7 torr

Solubilitysol 0.4 mg/L

Kd Kd mg/L

Koc Koc 256 mg/L

Photolysis half-life kdp 85.4 days Half-life

Aerobic Aquatic Metabolism kbacw 814 days Halfife

Anaerobic Aquatic Metabolism kbacs 420 days Halfife

Aerobic Soil Metabolism asm 407 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP .092 kg/ha

Application Efficiency: APPEFF .99 fraction

Spray Drift DRFT .064 fraction of application rate applied to pond

Application Date Date 24-04 dd/mm or dd/mmm or dd-mm or dd-mmm

Record 17: FILTRA

IPSCND 1

UPTKF

Record 18: PLVKRT

PLDKRT

FEXTRC0.5

Flag for Index Res. Run IR Reservoir

Flag for runoff calc. RUNOFFtotal none, monthly or total(average of entire run)

North Carolina

stored as Quiz.out

Chemical: Quizalofop

PRZM environment: NCcornESTD.txt modified Tueday, 29 May 2007 at 13:58:28

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 06:14:08

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 06:14:28

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 0.94 0.921 0.853 0.7439 0.6786 0.2907

1962 0.7011 0.6877 0.6589 0.5835 0.5296 0.2852
13

1963 1.277 1.253 1.157 1.017 0.9112 0.4273

1964 0.5814 0.5705 0.5278 0.504 0.4624 0.2817

1965 1.785 1.749 1.658 1.419 1.268 0.5783

1966 1.083 1.063 0.9834 0.8805 0.8128 0.4566

1967 0.9625 0.9443 0.8834 0.7626 0.7307 0.3915

1968 0.5957 0.5846 0.5458 0.4811 0.4369 0.2541

1969 0.9684 0.9497 0.8836 0.8022 0.7355 0.3516

1970 0.7295 0.7155 0.6848 0.6001 0.5825 0.327

1971 1.326 1.3 1.208 1.102 1.002 0.4714

1972 2.233 2.191 2.05 1.876 1.723 0.8028

1973 0.6932 0.6811 0.6468 0.6157 0.5748 0.3743

1974 1.346 1.32 1.249 1.083 0.9809 0.4647

1975 0.7256 0.7119 0.6675 0.5762 0.5223 0.2983

1976 0.9499 0.9314 0.9021 0.802 0.7183 0.3462

1977 0.8238 0.8099 0.7485 0.6336 0.5718 0.3071

1978 1.09 1.069 1.024 0.9021 0.8205 0.3923

1979 0.7238 0.7106 0.6787 0.6326 0.5867 0.3081

1980 1.408 1.381 1.274 1.077 1.013 0.5049

1981 0.9542 0.9365 0.8869 0.7907 0.7273 0.4054

1982 0.809 0.7938 0.7606 0.6681 0.6031 0.3182

1983 0.9009 0.8835 0.8327 0.7174 0.6404 0.3183

1984 1.754 1.723 1.586 1.351 1.204 0.5476

1985 1.355 1.33 1.267 1.17 1.079 0.5476

1986 1.589 1.559 1.439 1.246 1.135 0.556

1987 0.7524 0.7382 0.6824 0.5806 0.5397 0.3476

1988 0.699 0.6857 0.6338 0.5621 0.5085 0.2748

1989 1.715 1.681 1.581 1.39 1.251 0.5584

1990 1.404 1.377 1.298 1.176 1.058 0.5163

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.032258064516129 2.233 2.191 2.05 1.876 1.723 0.8028

0.0645161290322581 1.785 1.749 1.658 1.419 1.268 0.5783

0.0967741935483871 1.754 1.723 1.586 1.39 1.251 0.5584

0.129032258064516 1.715 1.681 1.581 1.351 1.204 0.556

0.161290322580645 1.589 1.559 1.439 1.246 1.135 0.5476

0.193548387096774 1.408 1.381 1.298 1.176 1.079 0.5476

0.225806451612903 1.404 1.377 1.274 1.17 1.058 0.5163

0.258064516129032 1.355 1.33 1.267 1.102 1.013 0.5049

0.290322580645161 1.346 1.32 1.249 1.083 1.002 0.4714

0.32258064516129 1.326 1.3 1.208 1.077 0.9809 0.4647

0.354838709677419 1.277 1.253 1.157 1.017 0.9112 0.4566

0.387096774193548 1.09 1.069 1.024 0.9021 0.8205 0.4273

0.419354838709677 1.083 1.063 0.9834 0.8805 0.8128 0.4054

0.451612903225806 0.9684 0.9497 0.9021 0.8022 0.7355 0.3923

0.483870967741936 0.9625 0.9443 0.8869 0.802 0.7307 0.3915

0.516129032258065 0.9542 0.9365 0.8836 0.7907 0.7273 0.3743

0.548387096774194 0.9499 0.9314 0.8834 0.7626 0.7183 0.3516

0.580645161290323 0.94 0.921 0.853 0.7439 0.6786 0.3476

0.612903225806452 0.9009 0.8835 0.8327 0.7174 0.6404 0.3462

0.645161290322581 0.8238 0.8099 0.7606 0.6681 0.6031 0.327

0.67741935483871 0.809 0.7938 0.7485 0.6336 0.5867 0.3183

0.709677419354839 0.7524 0.7382 0.6848 0.6326 0.5825 0.3182

0.741935483870968 0.7295 0.7155 0.6824 0.6157 0.5748 0.3081

0.774193548387097 0.7256 0.7119 0.6787 0.6001 0.5718 0.3071

0.806451612903226 0.7238 0.7106 0.6675 0.5835 0.5397 0.2983

0.838709677419355 0.7011 0.6877 0.6589 0.5806 0.5296 0.2907

0.870967741935484 0.699 0.6857 0.6468 0.5762 0.5223 0.2852

0.903225806451613 0.6932 0.6811 0.6338 0.5621 0.5085 0.2817

0.935483870967742 0.5957 0.5846 0.5458 0.504 0.4624 0.2748

0.967741935483871 0.5814 0.5705 0.5278 0.4811 0.4369 0.2541
14

0.1 1.7501 1.7188 1.5855 1.3861 1.2463 0.55816

Average of yearly averages: 0.410143333333333

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: Quiz

Metfile: w13722.dvf

PRZM scenario: NCcornESTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Quizalofop

Description Variable Name Value Units Comments

Molecular weight mwt 344.8 g/mol

Henry's Law Const.henry atm-m^3/mol

Vapor Pressure vapr 3e-7 torr

Solubilitysol 0.4 mg/L

Kd Kd mg/L

Koc Koc 256 mg/L

Photolysis half-life kdp 85.4 days Half-life

Aerobic Aquatic Metabolism kbacw 814 days Halfife

Anaerobic Aquatic Metabolism kbacs 420 days Halfife

Aerobic Soil Metabolism asm 407 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP .092 kg/ha

Application Efficiency: APPEFF .99 fraction

Spray Drift DRFT .064 fraction of application rate applied to pond

Application Date Date 29-04 dd/mm or dd/mmm or dd-mm or dd-mmm

Record 17: FILTRA

IPSCND 1

UPTKF

Record 18: PLVKRT

PLDKRT

FEXTRC0.5

Flag for Index Res. Run IR Reservoir

Flag for runoff calc. RUNOFFtotal none, monthly or total(average of entire run)

Ohio

stored as Quiz.out

Chemical: Quizalofop

PRZM environment: OHCornSTD.txt modified Tueday, 29 May 2007 at 13:59:54

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 06:14:08

Metfile: w93815.dvf modified Tueday, 26 August 2008 at 06:16:20

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 1.619 1.588 1.468 1.292 1.196 0.5063

1962 1.688 1.657 1.537 1.4 1.32 0.6977

1963 1.329 1.316 1.232 1.152 1.07 0.597

1964 0.5927 0.5827 0.5432 0.4895 0.4481 0.3111

1965 0.921 0.9042 0.8373 0.7246 0.6579 0.3376

1966 0.4584 0.4507 0.4203 0.3892 0.3898 0.2458

1967 1.696 1.668 1.556 1.408 1.362 0.6782

1968 3.682 3.627 3.426 2.998 2.7 1.271

1969 2.666 2.62 2.442 2.238 2.07 1.128

1970 1.078 1.061 1.008 0.9239 0.8581 0.5644

1971 0.8054 0.791 0.7416 0.6941 0.6426 0.3677
15

1972 1.134 1.122 1.051 0.9029 0.8237 0.4362

1973 0.8434 0.831 0.8061 0.7328 0.6704 0.3738

1974 2.596 2.551 2.388 2.289 2.166 1.027

1975 0.946 0.9353 0.8787 0.7874 0.7536 0.5463

1976 0.8604 0.8458 0.8114 0.7588 0.7027 0.3936

1977 0.5858 0.5781 0.5487 0.4961 0.484 0.3049

1978 1.092 1.072 1.032 0.9263 0.8497 0.4442

1979 0.995 0.9772 0.9076 0.8415 0.7754 0.4284

1980 2.717 2.669 2.479 2.237 2.054 0.9482

1981 3.043 2.986 2.853 2.482 2.234 1.122

1982 1.791 1.762 1.652 1.467 1.335 0.7864

1983 1.418 1.393 1.3 1.163 1.068 0.5826

1984 1.735 1.709 1.603 1.396 1.268 0.6539

1985 0.5392 0.5309 0.4979 0.462 0.4359 0.3101

1986 0.8866 0.8704 0.8265 0.7769 0.7084 0.3512

1987 0.8198 0.8092 0.755 0.6782 0.6411 0.3569

1988 0.8263 0.812 0.7869 0.7181 0.6666 0.3838

1989 6.147 6.037 5.659 4.934 4.438 1.93

1990 3.098 3.057 2.909 2.574 2.374 1.401

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.032258064516129 6.147 6.037 5.659 4.934 4.438 1.93

0.0645161290322581 3.682 3.627 3.426 2.998 2.7 1.401

0.0967741935483871 3.098 3.057 2.909 2.574 2.374 1.271

0.129032258064516 3.043 2.986 2.853 2.482 2.234 1.128

0.161290322580645 2.717 2.669 2.479 2.289 2.166 1.122

0.193548387096774 2.666 2.62 2.442 2.238 2.07 1.027

0.225806451612903 2.596 2.551 2.388 2.237 2.054 0.9482

0.258064516129032 1.791 1.762 1.652 1.467 1.362 0.7864

0.290322580645161 1.735 1.709 1.603 1.408 1.335 0.6977

0.32258064516129 1.696 1.668 1.556 1.4 1.32 0.6782

0.354838709677419 1.688 1.657 1.537 1.396 1.268 0.6539

0.387096774193548 1.619 1.588 1.468 1.292 1.196 0.597

0.419354838709677 1.418 1.393 1.3 1.163 1.07 0.5826

0.451612903225806 1.329 1.316 1.232 1.152 1.068 0.5644

0.483870967741936 1.134 1.122 1.051 0.9263 0.8581 0.5463

0.516129032258065 1.092 1.072 1.032 0.9239 0.8497 0.5063

0.548387096774194 1.078 1.061 1.008 0.9029 0.8237 0.4442

0.580645161290323 0.995 0.9772 0.9076 0.8415 0.7754 0.4362

0.612903225806452 0.946 0.9353 0.8787 0.7874 0.7536 0.4284

0.645161290322581 0.921 0.9042 0.8373 0.7769 0.7084 0.3936

0.67741935483871 0.8866 0.8704 0.8265 0.7588 0.7027 0.3838

0.709677419354839 0.8604 0.8458 0.8114 0.7328 0.6704 0.3738

0.741935483870968 0.8434 0.831 0.8061 0.7246 0.6666 0.3677

0.774193548387097 0.8263 0.812 0.7869 0.7181 0.6579 0.3569

0.806451612903226 0.8198 0.8092 0.755 0.6941 0.6426 0.3512

0.838709677419355 0.8054 0.791 0.7416 0.6782 0.6411 0.3376

0.870967741935484 0.5927 0.5827 0.5487 0.4961 0.484 0.3111

0.903225806451613 0.5858 0.5781 0.5432 0.4895 0.4481 0.3101

0.935483870967742 0.5392 0.5309 0.4979 0.462 0.4359 0.3049

0.967741935483871 0.4584 0.4507 0.4203 0.3892 0.3898 0.2458

0.1 3.0925 3.0499 2.9034 2.5648 2.36 1.2567

Average of yearly averages: 0.64951

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: Quiz

Metfile: w93815.dvf
16

PRZM scenario: OHCornSTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Quizalofop

Description Variable Name Value Units Comments

Molecular weight mwt 344.8 g/mol

Henry's Law Const.henry atm-m^3/mol

Vapor Pressure vapr 3e-7 torr

Solubilitysol 0.4 mg/L

Kd Kd mg/L

Koc Koc 256 mg/L

Photolysis half-life kdp 85.4 days Half-life

Aerobic Aquatic Metabolism kbacw 814 days Halfife

Anaerobic Aquatic Metabolism kbacs 420 days Halfife

Aerobic Soil Metabolism asm 407 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP .092 kg/ha

Application Efficiency: APPEFF .99 fraction

Spray Drift DRFT .064 fraction of application rate applied to pond

Application Date Date 15-05 dd/mm or dd/mmm or dd-mm or dd-mmm

Record 17: FILTRA

IPSCND 1

UPTKF

Record 18: PLVKRT

PLDKRT

FEXTRC0.5

Flag for Index Res. Run IR Reservoir

Flag for runoff calc. RUNOFFtotal none, monthly or total(average of entire run)

Pennsylvania

stored as Quiz.out

Chemical: Quizalofop

PRZM environment: PAcornSTD.txt modified Tueday, 29 May 2007 at 14:01:58

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 06:14:08

Metfile: w14751.dvf modified Tueday, 26 August 2008 at 06:15:00

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 1.041 1.029 0.9717 0.9353 0.8785 0.3664

1962 0.5865 0.5771 0.5399 0.479 0.4784 0.3853

1963 0.361 0.3551 0.3321 0.3074 0.2956 0.2589

1964 0.8833 0.8682 0.809 0.769 0.7279 0.4636

1965 0.4666 0.4592 0.4316 0.4164 0.4169 0.3309

1966 1.742 1.709 1.619 1.475 1.368 0.5505

1967 1.043 1.028 0.9759 0.9288 0.8765 0.7204

1968 1.725 1.694 1.592 1.374 1.239 0.6906

1969 2.364 2.32 2.152 1.867 1.687 0.8226

1970 0.9261 0.9112 0.8668 0.809 0.7572 0.5812

1971 0.7976 0.7841 0.7309 0.661 0.6053 0.4085

1972 3.238 3.177 2.944 2.502 2.244 1.031

1973 1.488 1.463 1.364 1.192 1.085 0.7363

1974 0.9603 0.9464 0.89 0.8259 0.7994 0.5694

1975 1.193 1.173 1.105 1.012 0.975 0.5889

1976 0.9523 0.9362 0.8726 0.7821 0.757 0.4675

1977 0.3762 0.3704 0.347 0.3081 0.3051 0.2542

1978 1.109 1.09 1.034 0.9303 0.9202 0.4886

1979 0.7356 0.7235 0.6759 0.6272 0.613 0.4068

1980 1.257 1.236 1.151 1.003 0.9154 0.51
17

1981 0.5943 0.5849 0.5623 0.5171 0.4968 0.3797

1982 2.75 2.702 2.642 2.366 2.154 0.9791

1983 1.117 1.099 1.032 0.9018 0.8191 0.5669

1984 1.461 1.436 1.393 1.294 1.197 0.6195

1985 1.675 1.648 1.568 1.407 1.312 0.7169

1986 1.066 1.051 1.002 0.879 0.822 0.5264

1987 0.9247 0.9096 0.8482 0.7395 0.6908 0.4801

1988 0.7558 0.7435 0.7052 0.6211 0.6056 0.3974

1989 2.185 2.147 2.04 1.847 1.698 0.8164

1990 1.651 1.623 1.51 1.336 1.238 0.7197

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.032258064516129 3.238 3.177 2.944 2.502 2.244 1.031

0.0645161290322581 2.75 2.702 2.642 2.366 2.154 0.9791

0.0967741935483871 2.364 2.32 2.152 1.867 1.698 0.8226

0.129032258064516 2.185 2.147 2.04 1.847 1.687 0.8164

0.161290322580645 1.742 1.709 1.619 1.475 1.368 0.7363

0.193548387096774 1.725 1.694 1.592 1.407 1.312 0.7204

0.225806451612903 1.675 1.648 1.568 1.374 1.239 0.7197

0.258064516129032 1.651 1.623 1.51 1.336 1.238 0.7169

0.290322580645161 1.488 1.463 1.393 1.294 1.197 0.6906

0.32258064516129 1.461 1.436 1.364 1.192 1.085 0.6195

0.354838709677419 1.257 1.236 1.151 1.012 0.975 0.5889

0.387096774193548 1.193 1.173 1.105 1.003 0.9202 0.5812

0.419354838709677 1.117 1.099 1.034 0.9353 0.9154 0.5694

0.451612903225806 1.109 1.09 1.032 0.9303 0.8785 0.5669

0.483870967741936 1.066 1.051 1.002 0.9288 0.8765 0.5505

0.516129032258065 1.043 1.029 0.9759 0.9018 0.822 0.5264

0.548387096774194 1.041 1.028 0.9717 0.879 0.8191 0.51

0.580645161290323 0.9603 0.9464 0.89 0.8259 0.7994 0.4886

0.612903225806452 0.9523 0.9362 0.8726 0.809 0.7572 0.4801

0.645161290322581 0.9261 0.9112 0.8668 0.7821 0.757 0.4675

0.67741935483871 0.9247 0.9096 0.8482 0.769 0.7279 0.4636

0.709677419354839 0.8833 0.8682 0.809 0.7395 0.6908 0.4085

0.741935483870968 0.7976 0.7841 0.7309 0.661 0.613 0.4068

0.774193548387097 0.7558 0.7435 0.7052 0.6272 0.6056 0.3974

0.806451612903226 0.7356 0.7235 0.6759 0.6211 0.6053 0.3853

0.838709677419355 0.5943 0.5849 0.5623 0.5171 0.4968 0.3797

0.870967741935484 0.5865 0.5771 0.5399 0.479 0.4784 0.3664

0.903225806451613 0.4666 0.4592 0.4316 0.4164 0.4169 0.3309

0.935483870967742 0.3762 0.3704 0.347 0.3081 0.3051 0.2589

0.967741935483871 0.361 0.3551 0.3321 0.3074 0.2956 0.2542

0.1 2.3461 2.3027 2.1408 1.865 1.6969 0.82198

Average of yearly averages: 0.561123333333333

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: Quiz

Metfile: w14751.dvf

PRZM scenario: PAcornSTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Quizalofop

Description Variable Name Value Units Comments

Molecular weight mwt 344.8 g/mol

Henry's Law Const.henry atm-m^3/mol

Vapor Pressure vapr 3e-7 torr

Solubilitysol 0.4 mg/L

Kd Kd mg/L
18

Koc Koc 256 mg/L

Photolysis half-life kdp 85.4 days Half-life

Aerobic Aquatic Metabolism kbacw 814 days Halfife

Anaerobic Aquatic Metabolism kbacs 420 days Halfife

Aerobic Soil Metabolism asm 407 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP .092 kg/ha

Application Efficiency: APPEFF .99 fraction

Spray Drift DRFT .064 fraction of application rate applied to pond

Application Date Date 30-04 dd/mm or dd/mmm or dd-mm or dd-mmm

Record 17: FILTRA

IPSCND 1

UPTKF

Record 18: PLVKRT

PLDKRT

FEXTRC0.5

Flag for Index Res. Run IR Reservoir

Flag for runoff calc. RUNOFFtotal none, monthly or total(average of entire run)

Sorghum

Kansas

stored as Quiz.out

Chemical: Quizalofop

PRZM environment: KSsorghumSTD.txt modified Tueday, 29 May 2007 at 13:55:46

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 06:14:08

Metfile: w13996.dvf modified Tueday, 26 August 2008 at 06:14:52

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 2.839 2.786 2.596 2.45 2.318 0.6943

1962 7.61 7.458 6.916 6.068 5.457 2.245

1963 2.84 2.806 2.671 2.402 2.224 1.304

1964 8.935 8.76 8.089 6.986 6.389 2.377

1965 3.966 3.916 3.718 3.326 3.059 2.267

1966 2.333 2.291 2.124 1.819 1.634 1.129

1967 3.584 3.517 3.323 2.898 2.687 1.233

1968 3.143 3.085 2.951 2.573 2.368 1.32

1969 1.764 1.742 1.654 1.469 1.339 1.031

1970 3.689 3.638 3.391 2.927 2.625 1.128

1971 4.054 3.978 3.68 3.178 2.437 1.233

1972 4.35 4.268 3.946 3.429 3.161 1.829

1973 8.952 8.802 8.31 7.264 6.553 2.491

1974 4.319 4.263 4.04 3.58 3.268 2.304

1975 2.505 2.46 2.3 2.054 1.95 1.213

1976 1.626 1.604 1.519 1.344 1.226 0.8279

1977 5.735 5.62 5.325 4.659 4.214 1.589

1978 6.33 6.211 5.813 4.992 4.533 2.14

1979 5.216 5.121 4.769 4.248 4.024 2.306

1980 4.831 4.743 4.481 3.917 3.416 1.901

1981 2.847 2.81 2.659 2.415 2.285 1.703

1982 1.774 1.752 1.663 1.497 1.38 1.021

1983 2.327 2.284 2.144 1.9 1.689 0.897

1984 2.472 2.426 2.243 2.13 1.963 1.059

1985 3.125 3.082 3.024 2.743 2.491 1.227

1986 3.149 3.093 2.935 2.64 2.453 1.296

1987 3.245 3.183 2.996 2.627 2.408 1.325

1988 1.327 1.311 1.249 1.127 1.041 0.6666

1989 4.72 4.636 4.321 3.838 3.485 1.401

1990 4.721 4.631 4.301 3.809 3.647 1.892

Sorted results
19

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.032258064516129 8.952 8.802 8.31 7.264 6.553 2.491

0.0645161290322581 8.935 8.76 8.089 6.986 6.389 2.377

0.0967741935483871 7.61 7.458 6.916 6.068 5.457 2.306

0.129032258064516 6.33 6.211 5.813 4.992 4.533 2.304

0.161290322580645 5.735 5.62 5.325 4.659 4.214 2.267

0.193548387096774 5.216 5.121 4.769 4.248 4.024 2.245

0.225806451612903 4.831 4.743 4.481 3.917 3.647 2.14

0.258064516129032 4.721 4.636 4.321 3.838 3.485 1.901

0.290322580645161 4.72 4.631 4.301 3.809 3.416 1.892

0.32258064516129 4.35 4.268 4.04 3.58 3.268 1.829

0.354838709677419 4.319 4.263 3.946 3.429 3.161 1.703

0.387096774193548 4.054 3.978 3.718 3.326 3.059 1.589

0.419354838709677 3.966 3.916 3.68 3.178 2.687 1.401

0.451612903225806 3.689 3.638 3.391 2.927 2.625 1.325

0.483870967741936 3.584 3.517 3.323 2.898 2.491 1.32

0.516129032258065 3.245 3.183 3.024 2.743 2.453 1.304

0.548387096774194 3.149 3.093 2.996 2.64 2.437 1.296

0.580645161290323 3.143 3.085 2.951 2.627 2.408 1.233

0.612903225806452 3.125 3.082 2.935 2.573 2.368 1.233

0.645161290322581 2.847 2.81 2.671 2.45 2.318 1.227

0.67741935483871 2.84 2.806 2.659 2.415 2.285 1.213

0.709677419354839 2.839 2.786 2.596 2.402 2.224 1.129

0.741935483870968 2.505 2.46 2.3 2.13 1.963 1.128

0.774193548387097 2.472 2.426 2.243 2.054 1.95 1.059

0.806451612903226 2.333 2.291 2.144 1.9 1.689 1.031

0.838709677419355 2.327 2.284 2.124 1.819 1.634 1.021

0.870967741935484 1.774 1.752 1.663 1.497 1.38 0.897

0.903225806451613 1.764 1.742 1.654 1.469 1.339 0.8279

0.935483870967742 1.626 1.604 1.519 1.344 1.226 0.6943

0.967741935483871 1.327 1.311 1.249 1.127 1.041 0.6666

0.1 7.482 7.3333 6.8057 5.9604 5.3646 2.3058

Average of yearly averages: 1.50166

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: Quiz

Metfile: w13996.dvf

PRZM scenario: KSsorghumSTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Quizalofop

Description Variable Name Value Units Comments

Molecular weight mwt 344.8 g/mol

Henry's Law Const. henry atm-m^3/mol

Vapor Pressure vapr 3e-7 torr

Solubility sol 0.4 mg/L

Kd Kd mg/L

Koc Koc 256 mg/L

Photolysis half-life kdp 85.4 days Half-life

Aerobic Aquatic Metabolism kbacw 814 days Halfife

Anaerobic Aquatic Metabolism kbacs 420 days Halfife

Aerobic Soil Metabolism asm 407 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP .154 kg/ha

Application Efficiency: APPEFF .95 fraction

Spray Drift DRFT .05 fraction of application rate applied to pond

Application Date Date 15-08 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 Reservoir
20

Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)

Ground Water

 SCIGROW

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:Quizalofop-p-ethyl

time is 7/19/2011 11:28: 6

------------------------------------------------------------------------

 Application Number of Total Use Koc Soil Aerobic

 rate (lb/acre) applications (lb/acre/yr) (ml/g) metabolism (days)

------------------------------------------------------------------------

 0.138 1.0 0.138 9.00E+01 407.0

------------------------------------------------------------------------

groundwater screening cond (ppb) = 1.29E+00 

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