## 1 **U. S. ENVIRONMENTAL PROTECTION AGENCY**

**Washington, D.C. 20460**

**OFFICE OF CHEMICAL SAFETY AND**  **POLLUTION PREVENTION**


## Date: July 1 9 , 2011 **PC Code** : 1287 11 **DP Barcode** : DP 3 8 4661 **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 f ield 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 μ g/L for acute exposure, 2.0 μ g/L for chronic exposure , and 1.3 μ g/L for long

term cancer exposure from MS corn scenario (Table 4)

. These values are higher than the previously predicted EDWC s of 5.25 μ g/L for acute exposure, 1.99 μ g/L for chronic exposure, and 1.34 μ g/L for long

-term cancer exposure
. Additionally, the Tier 1 drinking water predicted EDWC of 1.29 μ g/L for both acute and chronic exposure is higher than the previous highest EDWC of 0.15 μ g/L for ground water. **Therefor e, 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 Sy

nthesis Program (NPSP) of the U.S. Geological Survey at: http://water.usgs.gov/nawqa/pnsp/usage/maps/show_map.php?ye ar=02&map=m7006 (shown here as Figure 1.

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

## This drinking water exposure assessment addresses use of quizalofop

-p - ethyl on corn to produce herbicide

-tolerant f

ield c orn 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 - ethylherbicides 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 - ethyltolerance trait) during seed propagation. According to the proposed label q

uizalofop

-p - ethylis 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 q uizalofop

p - 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

– PE 5 V01, which incorporates the standard scenarios developed by EFED. For drinking water purpose s , the index reservoir is simulated. The index reservoir is based on a 172.8 ha watershed draining into a 5.3 ha res ervoir 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 characteristic s 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 - ethylcan be applied

. Ground Water Sources The estimated drinking water concentrations from ground water sources were calculated using the Tier I SCIGROW ( S creening C oncentration In Ground Water) model. Itis a regression approach model, based on the results of several pro spective 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 S electing Input P arameters in Modeling the Environmental F ate and Transport of P esticides, 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 Missis sippi, 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 T able 1

. **Table 1**  **. Corn scenarios employed in this asses**  **sm ent.**  **Scenario Crop Region, Met File and Soil Info**  **Crop Developm ent**  **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: 1 48 , Lancaster Co.

Metfile: W14751 , Soil: Hagerstown Silt Loam 4/16 (emergence date) 4/30 (2 weeks after emergence) **Sorghum** Kansas MLRA : M106 , Brow n 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 purpose s : 1. Quizalofop

-p - ethylis 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**  **PRZ M and EXAMS**  **input param eters.**  **Model Param eter**  **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 Com bined p arent, 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 metab olism t1⁄2 

### Anaerobic Aquatic Degradation t1⁄2 

### 420 days Com bined p arent, quizalo fop

- acid, and bound residues (Ascn # 146697) Aqueous Photolysis t1⁄2 

### 85.4 days Com bined p arent and quizalofop

- acid (Ascn # 146693) Hydrolysis t1⁄2 

### Stable Com bined p arent 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 Parameter** **s for SCI -**  **GROW .**  **Model Param eter**  **Value Comments**  Application Rate Corn: 0. 0825 lb s 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 Com bined p arent, 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 use s considered in this assessment

. The outputs of PE 5 runs are presented in Appendix B

. **Table 4**  **. Estimat** **ed drinking water concentrations (EDWC) from surface water sources adjusted with 87%**  **PCA (percent cropped area).**

**State 1**  **- in** **- 10 yr**  **Peak (** **μ g/L)**  **1 -** **in -**  **10 yr**

**Annual Mean (** **μ g/L)**  **Overall Annual Mean**  **( μ** **g/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 μ g/L (sorghum scenario) and is assumed to be representative for both acute and chronic purpose s . 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 **Q uizalofop 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**

**P henol 2**  N N

Cl O O C H CH 3 C O O C H 2 CH 3



### N N

Cl O O C H CH 3 

### C O OH

N N

Cl O O C H CH 3 

### 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 CH 3 

## C O O C H 2 

## CH 3 

## HO O C

H CH 3 

## C O OH

## 9

**Appendix B** 

**– PE**  **5 (s** **urface w** **ater )**  **and SCI -** **GROW (g** **round w** **ater )**  **output s**  **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 1.85 5 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 0.129 032258064516 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 1.48 4 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 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 .092 kg/ha Application Efficiency: AP PEFF .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 FEXTRC 0.5 Flag for Index Res. Run IR Reservoir Flag for runoff calc. RUNOFF total 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 1.15 1 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 D ay 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 3.6 72 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 0.322580645 16129 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 0.77419 3548387097 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 0.42 84 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 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 .092 kg/ha Application Efficiency: AP PEFF .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 FEXTRC 0.5 Flag for Index Res. Run IR Reservoir Flag for runoff calc. RUNOFF total 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 1.3 2 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 0.308 1 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 0.161 290322580645 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 0.96 84 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 0.74 39 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 0.87096774193548 4 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 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 .092 kg/ha Application Efficiency: AP PEFF .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 FEXTRC 0.5 Flag for Index Res. Run IR Reservoir Flag for runoff calc. RUNOFF total 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 1.70 9 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 0.74193 5483870968 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 1.256 7 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 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 .092 kg/ha Application Efficiency: AP PEFF .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 FEXTRC 0.5 Flag for Index Res. Run IR Reservoir Flag for runoff calc. RUNOFF total 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 0.87 65 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 0.6 759 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 1.84 7 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 1.48 8 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 Chemic al 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

## 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: AP PEFF .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 1 8: PLVKRT PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR Reservoir Flag for runoff calc. RUNOFF total 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 0.19354 8387096774 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 2.89 8 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 I ndex 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 ra te (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 ************************************************************************