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U. S. ENVIRONMENTAL PROTECTION AGENCY

Washington, D.C. 20460

OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

PC Code: 090100

DP Barcode: 404711

January 17, 2013 

MEMORANDUM

SUBJECT: Tier II Drinking Water Exposure Assessment to Establish Tolerances of 

Chlorantraniliprole on Citrus Fruits Group 10-10, Pome Fruits Group 11-10, 

Cereal Grain Crop Group 15 (except Rice), and Cereal Grain Forage, Fodder, 

and Straw, Crop Group 16.

TO: Sidney Jackson, Risk Manager Reviewer

Barbara Madden, Risk Manager

FROM: Christopher M. Koper, Chemist

Environmental Fate and Effects Division (7507P)

THROUGH: Ed Odenkirchen, Ph.D., Acting Branch Chief, ERB1

Sujatha Sankula, Ph.D., Lead Biologist

 Michael B. Lowit, Ph.D., Ecologist (Secondary Reviewer)

Environmental Fate and Effects Division (7507P)

Executive Summary

A Tier II screening-level drinking water assessment was conducted for a petition submitted by

DuPont De Nemours and Company to establish tolerances of chlorantraniliprole for the Citrus 

Fruits Group 10-10, Pome Fruits Group 11-10, Cereal Grain Crop Group 15 (except Rice), and 

the Cereal Grain Forage, Fodder, and Straw Crop Group 16.

Chlorantraniliprole can be applied to citrus and pome fruits by foliar (aerial and ground)

application according to the DuPontTM Altacor®insect control (EPA Reg. No. 352-730) label. In

addition, the insecticide can be applied to cereal grains crop group 15 and 16 by foliar 

application according to the DuPontTM Coragen®insect control (EPA Reg. No. 352-729) label and 

foliar and chemigation techniques according to the DuPontTM Prevathon®insect control (EPA 

Reg. No. 352-844) label.

The estimated drinking water concentrations (EDWCs) are based on the maximum proposed 

application rates specified in the product labels. The EDWCs for the human health risk 

assessment are presented in Table 1.

For surface water, the EDWCs for the scenarios modeled in this assessment did not exceed the 

previous EDWCs for use on cranberries reported in a previous drinking water assessment 

(D381819+) dated 01 December 2010. The previously reported acute concentration of 55.30 

μg/L, annual mean (chronic) concentration of 39.87μg/L and the 30 year annual average 
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concentration of 39.87μg/L are greater than the reported EDWCs from the proposed uses for all 

scenarios reported in Table 1. Therefore, the current EDWCs for surface water do not supersede 

the drinking water concentrations for cranberry previously estimated for this chemical. 

For groundwater, based on the proposed highest annual use rates for citrus and pome fruits, the 

SCI-GROW model concentrations of chlorantraniliprole was 0.85 μg/L (Table 1). This value 

was lower than 1.06 μg/L reported for in the previous drinking water assessment (D348133) 

dated 10 January 2008. Therefore, the current EDWC does not supersede the previous EDWC.

In conclusion, the current EDWCs for surface water and groundwater do not supersede previous 

calculated EDWCs for chlorantraniliprole. 

Table 1. Chlorantraniliprole Estimated Drinking Water Concentrations (EDWCs)1for Surface Water

and Ground Water based on Selected Crop Scenarios

Proposed Label Use

PRZM/EXAMS

Scenario1

(first app date)

Method2

Application Rate

(interval between 

applications)

1-in-10 

year 

acute 

(μg/L)

1-in-10 

year 

chronic 

(μg/L)

30- year 

average 

(μg/L)

Surface Water

DupontTM Altacor®insect control with RYNAXPYR

®

 [EPA Reg. No. 352-730]

Citrus Fruits

Crop Group 10-10

FL Citrus

(Dec. 23 – foliar)

A 2 app @ 0.100 lb a.i./acre

(7-day interval)

8.37 1.82 1.14

G 8.28 1.76 1.06

Pome Fruits

Crop Group 11-10

CA Fruit

( July 12 – foliar)

A

2 app @ 0.100 lb a.i./acre

(10-day interval)

4.05 2.96 2.40

G 3.13 2.12 1.61

NC Apple

(October 5 – foliar)

A 8.18 2.76 1.73

G 7.78 2.56 1.49

OR Apple

( October 10 – foliar)

A 5.59 2.63 2.12

G 5.10 2.32 1.80

PA Apple

(September 25 – foliar)

A 7.05 3.49 2.06

G 6.79 3.21 1.73

DupontTM Coragen®insect control with RYNAXPYR

® [EPA Reg. No. 352-729]

Cereal Grains Crop Group 

15 (except rice)

Cereal Grain Forage, 

Fodder, and Straw Crop 

Group 16

ND Wheat

( July 8 – foliar)

A

3 app @ 0.065 lb a.i./acre

(7-day interval)

7.37 4.62 3.85

G 6.93 4.27 3.48

KS Sorghum

(September 3 – foliar)

A 10.30 4.16 2.57

G 10.03 4.06 2.40

DupontTM Prevathon®insect control with RYNAXPYR

® [EPA Reg. No. 352-844]

Cereal Grains Crop Group 

15 (except rice)

Cereal Grain Forage, 

Fodder, and Straw Crop 

Group 16

ND Wheat

(July 8 – foliar)

A

3 app @ 0.067 lb a.i./acre

(7-day interval)

7.57 4.75 3.96

G 7.12 4.38 3.57

C 6.09 3.66 2.90

KS Sorghum

(September 3 – foliar)

A 10.58 4.28 2.64

G 10.30 4.17 2.47

C 8.45 3.58 1.95

Groundwater

SCI-GROW Citrus and Pome Fruits -- 2 app @ 0.100 lb a.i./acre 0.85 0.85 0.85

1 EDWC values adjusted with a Percent Cropped Area (PCA) factor of 0.91. Bold numbers denote maximum EDWC values.

2 A = aerial application, G = ground application, C = chemigation
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Introduction

Chlorantraniliprole (DPX-E2Y45) is an insecticide belonging to the diamide class of chemistry. 

The specific mode of action is through chlorantraniliprole binding with insect ryanodine 

receptors (http://www.rsc.org/chemistryworld/News/2006/June/28060601.asp). This mode of 

action causes muscle contraction, which leads to paralysis and ultimately death of the insect. 

Chlorantraniliprole is persistent and mobile in terrestrial and aquatic environments. Extended 

chlorantraniliprole use is expected to cause accumulation of residues in soil from year to year. 

Major routes of dissipation are expected to be alkaline-catalyzed hydrolysis, photodegradation in 

water, leaching, and runoff. Detailed description of fate and transport properties of 

chlorantraniliprole can be obtained from the comprehensive drinking water assessment 

(D348133) dated 10 January 2008. 

The Agency has received two aquatic field dissipation studies conducted on rice in California 

(MRID 48930703) and Italy (MRID 48930704) (DP 407351). These studies are currently under 

review.

Monitoring Data

There was no surface water or ground water monitoring data available for chlorantraniliprole.

Since the Agency lacks sufficient monitoring data to complete a comprehensive drinking water 

assessment, estimated drinking water concentrations (EDWCs) were made by reliance on 

modeling the environmental fate and transport characteristics of chlorantraniliprole.

Drinking Water Exposure Modeling

The Agency does not have exposure scenarios for modeling all use sites and locations in the 

country. Therefore, the Agency risk assessments rely on a series of representative model 

scenarios to represent a suite of use sites and locations. Because the submitted

chlorantraniliprole labels propose a range of application rates with various application 

approaches and various crops, EFED conducted a comprehensive modeling analysis of the 

recommended application conditions for chlorantraniliprole. This analysis provides a series of 

possible use scenarios to assess the impact of application rate, application method, and crop on 

chlorantraniliprole concentrations in surface and ground water. The estimated drinking water 

concentrations (EDWCs) were generated using EFED’s standard suite of models. 

Models

Pesticide Root Zone Model (PRZM v3.12.2, May 12, 2005) and Exposure Analysis Modeling 

System (EXAMS v2.98.04.06, April 25, 2005) are simulation models coupled with the input

PE5.pl shell (PE5, PE Version 5.0, November 15, 2006) to generate EDWCs of

chlorantraniliprole residues that may occur in surface water used as drinking water. The PRZM 

model simulates pesticide movement and transformation on and across the agricultural field 

resulting from crop applications. The EXAMS model simulates pesticide loading via runoff, 

erosion, and spray drift assuming a standard watershed of 172.8 ha that drains into an adjacent 

standard drinking water index reservoir of 5.26 ha, an average depth of 2.74 m. A more detailed 

description of the index reservoir watershed can be found in Jones et al., 1998. The coupled 
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PRZM/EXAMS model and users manuals may be downloaded from the U.S. Environmental 

Protection Agency (EPA) Water Models web-page (USEPA, 2013). Percent Crop Areas (PCA) 

that account for the maximum area within a watershed that may be planted with the modeled 

crop are applied to concentrations predicted by PRZM/EXAMS. 

Screening Concentration in Ground Water (SCI-GROW v2.3, Jul. 29, 2003) is a regression 

model used as a screening tool to estimate pesticide concentrations found in ground water used 

as drinking water. SCI-GROW was developed by fitting a linear model to ground water 

concentrations with the Relative Index of Leaching Potential (RILP) as the independent variable. 

Ground water concentrations were taken from 90-day average high concentrations from 

Prospective Ground Water studies. The RILP is a function of aerobic soil metabolism and the 

soil-water partition coefficient. The output of SCI-GROW represents the concentrations of

residues that might be expected in shallow unconfined aquifers under sandy soils, which is 

representative of the ground water most vulnerable to pesticide contamination and likely to serve 

as a drinking water source. The SCI-GROW user’s manual is currently under development; 

however, information concerning the model can be found on the EPA Water Models web-page 

(USEPA, 2013). 

Input Parameters

Input parameters for the PRZM/EXAMS and SCI-GROW models are listed in Table 2 and

Table 3. Explanations of various model input parameters are discussed below.

Table 2. PRZM/EXAMS Input Parameters for Chlorantraniliprole

Input Parameter: Value: Comment: Source:

Scenario(s): Citrus Group 10-10:

FL Citrus

Pome Group 11-10:

CA Fruit

NC, OR, PA Apple

Cereal Grains Crop Groups 

15 and 16:

ND Wheat

KS Sorghum

representative scenarios for each use N/A

Maximum Single 

Application Rate

lbs a.i./acre (kg a.i./ha)

0.065 (0.073) 

0.067 (0.075) 

0.100 (0.112) 

proposed maximum single application rate proposed label

Applications per Year Citrus and Pome: 2

Cereal Groups 15,16: 3

label directions. Application number for 

maximum single application rate.

proposed label

Application Interval (days) Citrus: 7

Pome: 10

Cereal Groups 15,16: 7

proposed application intervals proposed label
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Table 2. PRZM/EXAMS Input Parameters for Chlorantraniliprole

Input Parameter: Value: Comment: Source:

Date of Initial Application

(scenario/day/month)

Citrus Group 10-10:

FL Citrus: 23-12

Pome Group 11-10:

CA Fruit: 12-07

NC Apple: 05-10

OR Apple: 10-10

PA Apple: 25-09

Cereal Grains Crop Groups 

15 and 16:

ND Wheat: 08-07

KS Sorghum: 03-09

Date of initial application was calculated from 

the crop scenario’s harvest date, Pre-Harvest 

Interval (PHI), number of applications and 

application interval as written on the proposed 

labels. 

Crop Scenarios

Application Method Foliar: aerial and ground

Chemigation

label directions proposed label

CAM Input 2 (foliar: aerial, ground)

1 (chemigation)

(1) Soil applied, default incorporation depth, 

linearly decreasing with depth (2) linear foliar 

based on crop canopy

US EPA, 2005

IPSCND Input Citrus and Pome: 3

Cereal Grains 15,16: 1

...remaining pesticide on foliage is (1) 

converted to surface application to the top soil 

layer, (3) is retained as surface residue and 

continues to decay. This input only applies to 

foliar applications (CAM 2).

US EPA, 2005

Spray Drift Fraction 0.16 (aerial)

0.064 (ground)

0 (chemigation)

-- Input parameter guidance 

(USEPA, 2009) 

Application Efficiency 0.95 (aerial)

0.99 (ground)

1.0 (chemigation)

-- Input parameter guidance 

(USEPA, 2009)

Molecular Mass (g/mol) 483.15 -- --

Vapor Pressure at 25°C 

(torr)

1.57 x 10-13-- DuPont 16517

Henry’s Law Constant

(atm-m

3

/mol)

9.76 x 10-14 estimated calculated from 

solubility, vapor pressure 

and molecular weight

Solubility in Water (mg/L) 1.023 -- MRID 46889026

Organic Carbon Partition 

Coefficient (KOC) (L/kgOC)

330 1represents the average KOC from 5 values MRID 46889123

Aerobic Soil Metabolism 

Half-life (days)

627 2 , 3, 4 Calculated 90th percentile of mean. 

(mean= 509 days, SD= 253 days, t= 1.40, n= 

9)*Several reported half-lives in MRID 

46889124 were not used because of poor fit 

with first-order degradation model

MRID 46889014

MRID 46889015

MRID 46889124

Aerobic Aquatic 

Metabolism Half-life 

(days)

341 2 Calculated 90th percentile of mean. Mean= 

178 days, SD= 74.95 days, t= 3.078, n=2

MRID 46889016

Anaerobic Aquatic 

Metabolism Half-life 

(days)

624 208 days single half-life

(3 × 208 days per EFED guidance)

DuPont 14568

Hydrolysis Half-lives 

(days)

0 (stable) pH 7 MRID 46889017
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Table 2. PRZM/EXAMS Input Parameters for Chlorantraniliprole

Input Parameter: Value: Comment: Source:

Aqueous Photolysis

Half-life (days)

32.8 5 Natural sunlight half-life MRID 46889122

N/A = Not Applicable

1

= Koc values include 152, 438, 535, 268, 255.

2 

= tinput=Mean + (t90,n-1*SD) / √N

3

= EFED recalculated first-order half-lives for both benzo- and pyrazole-labeled chlorantraniliprole. The calculated half-lives are based on aerobic

 soil metabolism data in non-sterile soil at 250C. Half-lives used in the assessment include 578, 537, 375, 41, 247, 228, 889, 924, 396 days. 

4 = The 90th percentile of the mean half-life for chlorantraniliprole was 600 days for half-lives values presented in the OECD Chlorantraniliprole 

 Volume 3(1): Annex B, Environmental Fate and Behavior. (mean = 491 ( 886, 539, 380, 233, 323, 629, 423, 518 days); SD=203; t90, n-1 =1.417; 

 N=8

5 

= The natural sunlight half-life value of 32.8 days was modeled because this better half-life characterizes the behavior of 

 chlorantraniliprole in the environment. MRID 46889018 calculates a half-life of 0.31 days from a xenon arc lamp experiment using

 continuous irradiation.

Table 3. SCI-GROW Input Parameters for Chlorantraniliprole.

Input Parameter Value Comment Source

Maximum Application Rate per 

growing season (lbs a.i./A)

0.100 

(citrus and pome fruits)

maximum rates from proposed labels proposed label

Applications per Year 2 label directions proposed label

Organic Carbon Partition 

Coefficient (KOC) (L/kgOC)

152 lowest KOC value because there was greater 

than a three-fold variation among five values

MRID 46889123

Aerobic Soil Metabolism

Half-life (days)

410 Median value of 9 values since there are more 

than 4 metabolism values as suggested by 

guidance

MRID 46889124

MRID 46889015

MRID 46889124

Application methods and rates were obtained from the following proposed labels: DuPontTM 

Altacor®insect control (EPA Reg. No. 352-730), DuPontTM Coragen®insect control (EPA Reg. 

No. 352-729) and DuPontTM Prevathon®(EPA Reg. No. 352-844). 

Standard percent cropped areas (PCA) were used for all agricultural uses as estimates of the 

extent of watershed on which crops are grown (Effland et al., 1999). The default agricultural 

PCA of 0.91 was used for the proposed uses because they are not confined to specific regions of 

the United States. Actual fractions of cropped areas could be less in some areas of the country. 

A representative PRZM/EXAM model input and output data for Kansas Sorghum (foliar aerial

application) is attached in Appendix A. In addition, the SCI-GROW model input and output data 

for citrus and pome fruit use are attached in Appendix B.
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REFERENCES

Effland, W. R., N. C. Thurman, I. Kennedy. 1999. Proposed Methods for Determining 

Watershed-derived Percent Crop Areas and Considerations for Applying Crop Area 

Adjustments to Surface Water Screening Models. Presentation to the FIFRA Science 

Advisory Panel, May 27, 1999. Online at: 

http://www.epa.gov/scipoly/sap/1999/index.htm

Jones, R. D., S. Abel, W. R. Effland, R. Matzner, R. Parker. 1998. An Index Reservoir for Use 

in Assessing Drinking Water Exposure. Proposed Methods for Basin-scale Estimation of 

Pesticide Concentrations in Flowing Water and Reservoirs for Tolerance Reassessment. 

Presentation to FIFRA Science Advisory Panel, June 29-30, 1998. Online at: 

http://www.epa.gov/scipoly/sap/1998/index.htm

USEPA. 2005. PRZM-3, A Model for Predicting Pesticide and Nitrogen Fate in the Crop Root 

and Unsaturated Soil Zones: Users Manual for Release 3.0. May 2005.

USEPA. 2009. Guidance for Selecting Input Parameters in Modeling the Environmental Fate 

and Transport of Pesticides, Version 2.1. U.S. Environmental Protection Agency, Office 

of Prevention, Pesticides and Toxic Substances, Office of Pesticide Programs, 

Environmental Fate and Effects Division, October 22, 2009. 

USEPA. 2013. Water Models. U.S. Environmental Protection Agency, Pesticides: Science and 

Policy. Online at: http://www.epa.gov/oppefed1/models/water/
Page 8 of 9

Appendix A. Representative PRZM/EXAMS Output: KS Sorghum – Aerial Application

stored as CerealsBKSSorghumA.out

Chemical: Chlorantraniliprole

PRZM environment: KSsorghumSTD.txt modified Tueday, 29 May 2007 at 12:55:46

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:07

Metfile: w13996.dvf modified Tueday, 26 August 2008 at 05:14:51

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 7.14 7.00 6.69 6.33 5.76 1.67

1962 4.48 4.45 4.22 3.75 3.45 2.38

1963 2.07 2.04 1.93 1.69 1.66 1.32

1964 9.34 9.15 8.45 6.27 4.61 1.79

1965 8.26 8.10 7.47 6.39 5.75 3.77

1966 4.35 4.29 4.06 3.62 3.33 2.06

1967 9.56 9.38 8.90 7.73 7.19 3.41

1968 8.52 8.36 8.04 7.07 6.47 3.65

1969 4.98 4.91 4.65 4.13 3.81 2.74

1970 9.48 9.33 8.70 7.55 6.80 2.90

1971 7.78 7.64 7.08 6.15 4.94 2.94

1972 5.67 5.58 5.25 4.96 4.59 3.14

1973 20.16 19.77 18.86 16.63 15.10 5.58

1974 10.11 9.98 9.44 8.40 7.73 5.16

1975 5.35 5.26 4.94 3.97 3.82 2.84

1976 4.21 4.15 3.91 3.44 3.15 2.19

1977 5.73 5.63 5.24 4.83 4.53 2.02

1978 11.79 11.54 10.73 9.16 8.38 3.68

1979 5.82 5.71 5.49 5.15 4.49 3.33

1980 13.94 13.67 13.01 11.52 9.90 4.15

1981 9.22 9.08 8.55 7.53 6.89 4.76

1982 4.73 4.67 4.42 4.04 3.75 2.52

1983 5.35 5.25 4.92 4.45 3.99 2.29

1984 4.58 4.49 4.36 4.17 3.97 2.36

1985 9.51 9.35 8.69 7.92 7.28 3.15

1986 6.24 6.13 5.86 5.19 4.78 3.17

1987 3.31 3.27 3.10 2.78 2.59 1.80

1988 1.95 1.91 1.78 1.65 1.53 1.18

1989 7.88 7.73 7.18 6.18 5.67 2.52

1990 4.71 4.65 4.38 3.92 3.64 2.55

Sorted results

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

0.032258065 20.16 19.77 18.86 16.63 15.10 5.58

0.064516129 13.94 13.67 13.01 11.52 9.90 5.16

0.096774194 11.79 11.54 10.73 9.16 8.38 4.76

0.129032258 10.11 9.98 9.44 8.40 7.73 4.15

0.161290323 9.56 9.38 8.90 7.92 7.28 3.77

0.193548387 9.51 9.35 8.70 7.73 7.19 3.68

0.225806452 9.48 9.33 8.69 7.55 6.89 3.65

0.258064516 9.34 9.15 8.55 7.53 6.80 3.41

0.290322581 9.22 9.08 8.45 7.07 6.47 3.33

0.322580645 8.52 8.36 8.04 6.39 5.76 3.17

0.35483871 8.26 8.10 7.47 6.33 5.75 3.15

0.387096774 7.88 7.73 7.18 6.27 5.67 3.14

0.419354839 7.78 7.64 7.08 6.18 4.94 2.94

0.451612903 7.14 7.00 6.69 6.15 4.78 2.90

0.483870968 6.24 6.13 5.86 5.19 4.61 2.84

0.516129032 5.82 5.71 5.49 5.15 4.59 2.74

0.548387097 5.73 5.63 5.25 4.96 4.53 2.55

0.580645161 5.67 5.58 5.24 4.83 4.49 2.52

0.612903226 5.35 5.26 4.94 4.45 3.99 2.52

0.64516129 5.35 5.25 4.92 4.17 3.97 2.38

0.677419355 4.98 4.91 4.65 4.13 3.82 2.36

0.709677419 4.73 4.67 4.42 4.04 3.81 2.29

0.741935484 4.71 4.65 4.38 3.97 3.75 2.19

0.774193548 4.58 4.49 4.36 3.92 3.64 2.06

0.806451613 4.48 4.45 4.22 3.75 3.45 2.02

0.838709677 4.35 4.29 4.06 3.62 3.33 1.80

0.870967742 4.21 4.15 3.91 3.44 3.15 1.79

0.903225806 3.31 3.27 3.10 2.78 2.59 1.67

0.935483871 2.07 2.04 1.93 1.69 1.66 1.32

0.967741935 1.95 1.91 1.78 1.65 1.53 1.18

0.1 11.62 11.38 10.60 9.08 8.32 4.70 4.28 *

(PCA Adjusted) 10.58 * Average of yearly averages: 2.90 2.64 *

* PCA adjusted values

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: CerealsBKSSorghumA

Metfile: w13996.dvf

PRZM scenario: KSsorghumSTD.txt

EXAMS environment file: ir298.exv

Chemical Name: Chlorantraniliprole

Description Variable Name Value Units Comments

Molecular weight mwt 483.15 g/mol

Henry's Law Const. henry 9.76E-14 atm-m^3/mol

Vapor Pressure vapr 1.57E-13 torr

Solubility sol 1.023 mg/L

Kd Kd mg/L

Koc Koc 330 mg/L

Photolysis half-life kdp 32.8 days Half-life

Aerobic Aquatic Metabolism kbacw 341 days Halfife

Anaerobic Aquatic Metabolism kbacs 624 days Halfife

Aerobic Soil Metabolism asm 627 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.075 kg/ha

Application Efficiency: APPEFF 0.95 fraction

Spray Drift DRFT 0.16 fraction of application rate applied to pond

Application Date Date 9-Mar dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate 0.075 kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate 0.075 kg/ha

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)
Page 9 of 9

Appendix B. SCI-GROW Output Files:

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:Chlorantraniliprole use on Citrus and Pome Fruits

Time is 1/15/2013 1:11:16

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

 Application Number of Total Use Koc Soil Aerobic

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

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

 0.100 2.0 0.200 1.52E+02 410.0

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

Groundwater screening cond (ppb) = 8.50E-01 or 0.85 ppb

************************************************************************