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OFFICE OF

CHEMICAL SAFETY AND

 POLLUTION PREVENTION

U. S. ENVIRONMENTAL PROTECTION AGENCY

Washington, D.C. 20460

 PC Code: 071503

DP Barcode: D395364, D389616

 Date: October 27, 2011

MEMORANDUM

SUBJECT: Tier I Drinking Water Assessment in Support of Proposed or Amended Tolerances for 

the Fludioxonil IR-4 Uses on Ginseng; Onion Subgroups 3-07 A and B; Berry and Small 

Fruit Subgroups 13-07 A, B, F and G; Fruiting Vegetable Group 8-10, Except Tomato; 

Tomato; Leafy Vegetable Except Brassica Subgroup 4A; Pome Fruit Group 11-10; Citrus 

Group 10-10; Potato; Pineapple; Dragon Fruit; Avocado; Mango; Other Various Tropical 

Fruits.

TO: George Kramer, Chemist

Dana Vogel, Branch Chief

Risk Assessment Branch 1

Health Effects Division (7505P)

cc: Barbara Madden, Team Leader

Lisa Nollen, Risk Manager Reviewer

Risk Integration Minor Use, and Emergency Response Branch

Registration Division (7505P) 

Shaja Joyner, Product Manager 

Lisa Jones, Risk Manager Reviewer

Fungicide Branch

Registration Division (7505P) 

FROM: Cheryl Sutton, Ph.D., Environmental Scientist

Environmental Risk Branch IV

Environmental Fate and Effects Division (7507P)

REVIEWED

BY: Charles Peck, Environmental Engineer

Environmental Risk Branch IV

Environmental Fate and Effects Division (7507P)

APPROVED

BY: Marietta Echeverria, Branch Chief

Environmental Risk Branch IV

Environmental Fate and Effects Division (7507P)
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Executive Summary

EFED has completed a Tier I screening-level drinking water assessment for fludioxonil for the proposed 

IR-4 uses on ginseng; onion subgroups 3-07 a and b; berry and small fruit subgroups 13-07 a, b, f and g; 

fruiting vegetable group 8-10, except tomato; tomato; leafy vegetable except brassica subgroup 4a; pome 

fruit group 11-10; citrus group 10-10; potato; pineapple; dragon fruit; avocado; mango; and other various 

tropical fruits. This assessment is in support of proposed or amended tolerances for the crops/crop groups

listed above.

Fludioxonil (CAS 131341-86-1), a fungicide, is an active ingredient contained in multiple end-use 

products including, among others, Switch® 62.5 WG (25% a.i., with 37.5% cyprodinil; EPA Reg. No. 

100-953); Cannonball® WP (50% a.i.; EPA Reg. 100-1360); Scholar® Fungicide (50% a.i.; post-harvest 

usage only; EPA Reg. 100-969); Scholar® SC Fungicide (20.4% a.i.; post-harvest usage only; EPA Reg. 

100-1242); and Graduate A+ TM (20.6% a.i., with 20.6% azoxystrobin; post-harvest usage only; EPA 

Reg. 100-1308). Similar to previous assessments, this evaluation is limited to the exposure associated 

with fludioxonil alone and does not include exposure associated with fludioxonil in combination with 

cyprodinil or azoxystrobin.

The maximum proposed application rate among all proposed uses listed above (for onion subgroups 3-07 

a and b grown for seed) is 0.25 lbs ai/A/application, applied four times per year with a 7-day application 

interval, for a maximum total annual application rate of 1.0 lb ai/A/yr. Because the maximum proposed 

application rate among all of the uses considered for this assessment is less than the rates previously 

assessed by EFED for ornamentals, the estimated drinking water concentrations (EDWC) based on use on

ornamentals are recommended for use in the human health dietary assessment and are presented in Table 

1.

The most recent Tier II drinking water assessment (DWA memo dated 8/27/2009; DP Barcode 368586)

evaluated fludioxonil applications to container-grown ornamentals, and reported acute, chronic, and longterm (cancer) EDWCs of 108 ppb, 32.6 ppb (incorrectly reported as 53 ppb in the main text, but 

accurately presented in the modeling output in Appendix A of that document), and 25.5 ppb, respectively;

and a groundwater concentration of 0.4 ppb. The maximum application rate used in that assessment was 

one application of 4 lb ai/A/yr. [EFED notes that the Tier II assessment was a refinement of a Revised 

Tier I assessment (8/20/2009; DP364264) that was also conducted using an application rate of 4 lb 

ai/A/yr on container-grown ornamentals. The initial Tier I assessment of 6/22/2009 (same DP barcode) 

was conducted using an application rate of 2 lb ai/A/yr, only on field-grown ornamentals.]

However, based on information provided in Syngenta’s 9/9/2011 submission “Fludioxonil Registration 

Review Public Comments Response to Initial 60-Day Comment Period, Case Number: 7017, Docket 

Number: EPA-HQ-OPP-2010-1067,” EFED concurs that the use of the container-grown ornamentals 

application rate is not appropriate for estimating EDWCs. As noted by the registrant, the strong 

adsorption of the pesticide to the potting media used for container-grown ornamentals, as well as the use 

of containers, results in attenuation of pesticide movement from the containers to the underlying soil in 

the field, thereby reducing potential runoff of the pesticide. Thus, EFED now recommends that the values 

from the Tier I DWA of 6/22/2009 (D364264) be used in HED’s human dietary health assessment. The 

values in the Tier I DWA are based on the use of fludioxonil on field-grown ornamentals at one 

application of 2 lb ai/A/yr. 

The maximum proposed application rates for all of the uses considered for this assessment are presented 

in detail Table 2 in the Use Characterization section of this document. 
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Table 1. Maximum Tier I Estimated Drinking Water Concentrations in surface water based on 

fludioxonil use on field grown ornamentals at 2 lb ai/A/yr. 

Drinking Water Source 

(Model Used)

USE (Rate Modeled) Maximum Estimated Drinking Water 

Concentration (EDWC) (μg/L)

Groundwater (SCIGROW)

Field grown ornamentals (2 lbs. 

a.i./A/applic. x 1 applic.; total rate 

of 2 lb ai/A/yr )

Acute and Chronic 0.20

Surface Water (FIRST)

Field grown ornamentals (2 lbs. 

a.i./A/applic. x 1 applic.; total 

rate of 2 lb ai/A/yr )

Acute 83.8

Field grown ornamentals (2 lbs. 

a.i./A/applic. x 1 applic.; total 

rate of 2 lb ai/A/yr )

Chronic 38.5

Use Characterization

Fludioxonil is a phenylpyrole derivative of an antibiotic produced by the soil-borne bacterium 

Pseudomonas. It is intended to control certain post-harvest diseases caused by Monilinia fructicola and 

M. laxa (brown rot), Botrytis cinerea (gray mold), and Rhizopus stolonifer (Rhizopus rot). A suggested 

mode of action of phenylpyrroles derivatives is inhibition of the trans-membrane transport associated with 

glucose phosphorylation (USEPA, 1998). 

Maximum use pattern information for the proposed IR-4 uses being assessed here is presented in Table 1.

Table 1. Summary use information for proposed IR-4 uses of fludioxonil on various crops.

Use Max. Single 

Application

Rate 

(lbs. a.i./A)

No. of 

Applications

Annual 

Application

Rate 

(lbs. a.i./A/yr)

Minimum

Application Interval 

(days)

Application

Method(s)

ginseng 0.2524 1.0 14 Drip irrigation 

or drenching

onion subgroups 

3-07 a and b

1.021 1.0 Not Applicable (atplanting ground 

treatment)

Ground spray

(soil applied)

onion subgroups 

3-07 a and b

grown for seed

0.2524 1.0 7 Ground spray

(foliar)

berry and small 

fruit subgroups 

13-07 a, b, f and 

g

0.2214 0.9 7 Ground spray

Aerial spray in 

CA only

fruiting 

vegetable group 

8-10, except 

tomato

0.2214 0.9 7 Ground spray
Page 4 of 11

Use Max. Single 

Application

Rate 

(lbs. a.i./A)

No. of 

Applications

Annual 

Application

Rate 

(lbs. a.i./A/yr)

Minimum

Application Interval 

(days)

Application

Method(s)

tomato 0.2214 0.9 7 Ground spray

leafy vegetable 

except brassica 

subgroup 4a

0.2214 0.9 7 Ground spray

pome fruit group 

11-10

Post-harvest usage only.3

citrus group 10-

10

potato

pineapple

dragon fruit 0.2214 0.9 7 Ground spray

Aerial spray in 

CA only

avocado 0.2214 0.9 7 Ground spray

Aerial spray in 

CA only

mango 0.2214 0.9 7 Ground spray

Aerial spray in 

CA only

various tropical 

fruits

0.2214 0.9 7 Ground spray

Aerial spray in 

CA only

1Application information obtained from the label for Switch® 62.5 WG (25% a.i., with 37.5% cyprodinil; EPA Reg. No. 100-953). Maximum 

number of applic. per year assumed (4) based on maximum single and annual rates. 

2Application information obtained from the label for 

Cannonball® WP (50% a.i.; EPA Reg. 100-1360). Maximum number of applic. per year assumed (4) based on maximum single and annual rates

for crops receiving more than one application per year.

3Application information obtained from the labels for Scholar® Fungicide (50% a.i.; postharvest usage only; EPA Reg. 100-969); Scholar® SC Fungicide (20.4% a.i.; post-harvest usage only; EPA Reg. 100-1242); and Graduate A+ TM 

(20.6% a.i., with 20.6% azoxystrobin; post-harvest usage only; EPA Reg. 100-1308).

Environmental Fate and Transport Characterization

Laboratory and field data suggest that fludioxonil is moderately persistent to persistent (Goring et. al.

1975 persistence scale) in soil, with laboratory soil metabolism half-lives ranging from 143 to 365 days, 

and field dissipation half-lives ranging from 87 to 228 days. Fludioxonil is expected to be essentially 

stable in aquatic environments, based on laboratory half-lives of 473-718 days in aerobic aquatic 

metabolism studies and the results of anaerobic (flooded) soil studies in which the compound was stable. 

Photolysis is a major route of degradation, with a (near-surface) soil half-life of 1.6 days and an aqueous 

(near-surface) half-life of 8.7 days. Fludioxonil is slightly to moderately mobile (FAO classification 

scheme) in soil (Koc = 991 - 2440 mL/goc) and is primarily a concern for surface waters. Degradates of 

fludioxonil are highly mobile; however, none of the four major degradates are considered to be of 
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toxicological concern. The fludioxonil physical and chemical properties and the environmental fate 

source data from submitted studies are presented in Table 2.

There is a potential for fludioxonil to reach surface water through spray drift, as the compound may be 

applied by ground spray and aerial spray (in CA, limited crops). Because fludioxonil is moderately 

persistent to persistent in surface soils, there is also the potential for it to reach surface water through 

surface runoff either in solution or adsorbed to the soil. Based on the moderately high adsorption 

coefficients and the low solubility (1.5 ppm), it is unlikely that there will be significant contamination of 

surface water with fludioxonil through subsurface flow.

Table 2. Physical/chemical properties and environmental fate source data for fludioxonil.

Property Value Source Comments

Chemical Name

dinitrophenyl-U-[

14C]-labeled N-

(2-chloro-6-fluorobenzyl)-Nethyl-α,α,α-trifluoro-2,6-dinitro-ptoluidine

– –

Molecular Weight 248.19 Product 

chemistry

–

Solubility in Water (20 °C) 1.5 mg/L Product 

chemistry 

–

Vapor Pressure (20 °C) 5.33 10-9

torr Product 

chemistry

–

Hydrolysis Half-life (pH 7;

25C)

Stable MRID 

43152502

–

Aqueous Photolysis Half-life 

(@ pH 7; in days)

8.7 MRID

43496302

44382308

–

Soil Photolysis Half-life (days) 1.6 MRID

43496303

44382308 

(corrected for 

natural sunlight at 

40°N latitude)

Aerobic Soil Metabolism Halflife (days)

143, 220, 183, 365, 365, 325, 239, 

154 

MRIDs 

43380513, 

47169301, 

47169302a, 

471693012, 

471693013, 

471693014 

–

Anaerobic Soil Metabolism

Half-life (days)

Stable MRIDs 

47169302b, 

47169303 

Parent still 85% at 

60-d postflooding.

Parent still 83% at 

362-d postflooding. 

Aerobic Aquatic Metabolism 

Half-life (days)

Stable (both sediment systems) 47169304 Parent was still 

present at 83% 

and 78% of the 

applied at the end 

of the 177-day

study. 

Anaerobic Aquatic 

Metabolism Half-life (days)

No Data – –
Page 6 of 11

Property Value Source Comments

Organic Carbon-Normalized 

Soil Partition Coeffic. (mL/goc) 

(Koc)

991 (loam)

1250 (loam)

1490 (sand)

2440 (sandy loam)

MRID 

44382311

–

Terrestrial Field Dissipation 

(t 1⁄2; days )

(top 15 cm of soil)

211 44382316

Bareground plot in 

NJ; turf plot 

results not valid.

228

44382314

44382315

44382317

Bareground plot in 

GA; turf plot 

results not valid.

87

44940102

45357001

Bareground plot in 

CA.

Henry’s Law Constant 1.16 x 10-9

atm-m

3

-mole-1 – –

Bioconcentration Factor in 

Fish (BCF)

430X MRID 

44382320

–

Monitoring Data

Fludioxonil is not included as one of the analytes monitored in U.S. surface and groundwater under the 

USGS’s National Water Quality Assessment (NAWQA) program (http://water.usgs.gov/nawqa), nor were 

surface water and sediment monitoring data available from the California Department of Pesticide 

Regulation (CDPR).

Drinking Water Exposure Modeling

All of the information presented below was obtained from the Tier I DWA of 6/22/2009 (D364264)

and is presented again here for HED’s convenience.

Models

An EDWC in groundwater was estimated using EFED’s Tier I aquatic model SCIGROW (Screening

Concentration in Ground Water, version 2.3; 8/8/2003). SCIGROW is a regression model used as a 

screening tool to estimate pesticide concentrations found in ground water used as drinking water. 

SCIGROW was developed by fitting a linear model to groundwater concentrations with the Relative 

Index of Leaching Potential (RILP) as the independent variable. Groundwater 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 SCIGROW represents 

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

representative of the ground water most vulnerable to pesticide contamination likely to serve as a drinking 

water source (USEPA, 2002)

The EDWCs in surface water were estimated using EFED’s Tier I aquatic model FIRST (v1.1.1; 3/26/08). 

FIRST (FQPA Index Reservoir Screening Tool) is a metamodel of PRZM and EXAMS used as a 

screening tool to estimate pesticide concentrations found in surface water used as drinking water. FIRST 

was developed by making multiple runs of PRZM using varying sorption coefficients and determining the 

concentration in the EXAMS index reservoir scenario after a two-inch single storm event. The Index 

Reservoir is a standard water body used by the Office of Pesticide Programs to assess drinking water 
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exposure (Jones et al., 1998). It is based on a real reservoir (albeit not currently in active use as a 

drinking water supply), Shipman City Lake in Illinois, that is known to be vulnerable to pesticide 

contamination. The single runoff event moves a maximum of 8% of the applied pesticide into the 

reservoir. This amount can be reduced by degradation or effects of binding to soil in the field. 

Additionally, FIRST can account for spray drift and adjusts for the area within a watershed that is planted 

with the modeled crop (Percent Cropped Area). Spray drift (modeled as direct deposition of the pesticide 

into the reservoir) is assumed to be 16% of the applied active ingredient for aerial application, 6.3% for 

orchard air blast application, and 6.4% for other ground spray application. Despite being a single event 

model, FIRST can account for spray drift from multiple applications. The non-agricultural Percent 

Cropped Area (PCA) of 100% was used in this assessment. The PRZM scenario used for FIRST 

development was among the most vulnerable, and thus resulting surface water concentrations represent 

the upper bound values on the concentrations that might be found in drinking water from the use of a 

pesticide. 

Modeling Approach and Input Parameters

Tier I modeling for the EDWC in surface water and groundwater from fludioxonil use on field-grown 

ornamentals was conducted using the maximum proposed application rate of 2.0 lbs a.i./A/application 

applied once for a total application rate of 2 lb ai/A/yr. Physical/chemical properties and environmental 

fate source data (from submitted studies) were presented in Table 3. Input values used for surface water 

modeling with FIRST are presented in Table 4. Input values used for groundwater modeling with SCIGROW2 are presented in Table 5. 

Input parameter values used in this assessment were selected from the environmental fate data submitted 

by the registrant and in accordance with US EPA-OPP EFED water model parameter selection guidelines, 

Guidance for Selecting Input Parameters in Modeling the Environmental Fate and Transport of 

Pesticides, Version 2.1, October 22, 2009.

Table 4. FIRST input parameter values for fludioxonil use on field-grown ornamentals.

Parameter (Units) Value(S) Source Comment

Application Rate (lb a.i./A) 2.0 Medallion 

Label

–

Number of Applications 1 Medallion 

Label

–

Interval between Applications 

(days)

NA Medallion 

Label

–

Percent Cropped Area 

(decimal)

1.0 Medallion 

Label

A PCA is not used for ornamentals.

Soil Partition Coefficient 

KOC (mL/gOC))

991 MRID 

44382311

Represents the lowest non-sand Koc value 

among four values ranging from 991 to 

2440 mL/g. 

Aerobic Soil Metabolism Halflife (days)

294.9 MRIDs 

43380513, 

47169301, 

47169302a, 

471693012, 

471693013, 

471693014 

Represents the 90th percentile of the upper 

confidence bound on the mean (249.3) of 8 

half-life values.

Wetted in? No Medallion 

Label

–

Depth of Incorporation (inches) 0 Medallion 

Label

–
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Parameter (Units) Value(S) Source Comment

Method of Application Ground 

spray

Medallion 

Label

–

Solubility in Water @ 20 OC, 

(pH 7; in mg/L or ppm)

1.5 Product 

Chemistry

–

Aerobic Aquatic Metabolism 

Half-life (days)

0 (stable) MRID 

47169304

–

Hydrolysis Half-life @ pH 7, 25 

OC (days)

0 (stable) MRID 

43152502

–

Aquatic Photolysis Half-life @ 

pH 7 (days)

8.7 MRID 

43496302

–

Table 5. SCI-GROW2 input parameter values for fludioxonil use on field-grown ornamentals.

Model Input Parameter Input Value and Unit1Source Comments

Aerobic Soil Metabolism Halflife (days)

230

MRIDs 

43380513, 

47169301, 

47169302a, 

471693012, 

471693013, 

471693014 

Median of eight 

values

Organic Carbon Normalized 

Partition Coefficient Koc 1370 MRID 44382311

Median of four 

values

Application Rate 2 lb ai/A/application Medallion Label –

Maximum No. of 

Applications/Year 1

Medallion Label –

1Values determined per USEPA 2009a.

Modeling Results

Tier I surface water and groundwater modeling results for fludioxonil for ground spray 

application to field-grown ornamentals are presented in Table 6. These values are recommended for use 

in the human health risk assessment. Output values for surface water are not modified using the 

percentage crop area (PCA) adjustment factor since the value used for field grown ornamentals is 1.0

(USEPA 2010). Output values for groundwater are not adjusted for a PCA. 

Table 6. Maximum Tier I EDWCs based on ground spray application of fludioxonil to field grown 

ornamentals at 2 lbs. a.i./A/yr applied in a single application.

Drinking Water Source 

(Model Used)

Use (Rate Modeled) Maximum Estimated Drinking Water 

Concentration (EDWC) (μg/L)

Groundwater (SCIGROW) Field grown ornamental Acute and Chronic 0.20

Surface Water (FIRST)

Field grown ornamental Acute 83.8

Field grown ornamental Chronic 38.5

The SCIGROW concentration (ppb) represents the groundwater concentration that might be expected in 

shallow unconfined aquifers under sandy soils. The output is used for both acute and chronic endpoints.
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FIRST concentrations (ppb) represent untreated surface water concentrations. The one-in-10-year peak 

day concentration is used for acute endpoints and the one-in-10-year annual average concentration is used 

for chronic endpoints. 

The EDWCs provided in this assessment are conservative estimates of concentrations in drinking water. 

If dietary risks require refinement, higher tiered crop-specific and location-specific models and modeling 

scenarios can be used.

Uncertainties and Data Gaps

This assessment is based on available environmental fate data. There are no significant data gaps in the 

environmental fate database submitted by the registrant. One uncertainty is that the EDWCs represent 

untreated surface water concentrations. While treatment systems utilizing UV light may help degrade 

parent fludioxonil, which is susceptible to photodegradation, specific drinking water treatment effects on 

fludioxonil are unknown. Another uncertainty is associated with the use of SCI-GROW and the Koc value 

used to determine the EDWC for groundwater sources of drinking water. SCI-GROW was developed 

using Koc values ranging from 32-180 mL/goc,while the Koc for fludioxonil is 1370. Extrapolation beyond 

the values used to develop the model increase the uncertainty associated with the groundwater EDWC.

REFERENCES

Goring, C.A.I., D.A. Laskowki, J.H. Hamaker, and R.W. Meikle. 1975. Principles of pesticide 

degradation in soil. Pages 135-172 in (R. Haque and V.H. Freed, eds.) Environmental dynamics of 

pesticides. Plenum Press, New York.

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

Syngenta. 2011. Fludioxonil Registration Review Public Comments Response to Initial 60-Day 

Comment Period, Case Number: 7017, Docket Number: EPA-HQ-OPP-2010-1067. Syngenta. 

Greensboro, NC. Sept. 9, 2011.

USEPA. 2002. SCIGROW: Users Manual. Online at: 

http://www.epa.gov/oppefed1/models/water/#scigrow

USEPA. 2005. EXAMS User’s Manual. Online at: 

http://www.epa.gov/ceampubl/swater/exams/index.html

USEPA. 2006. PRZM User’s Manual. Online at: http://www.epa.gov/ceampubl/gwater/przm3/index.html

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

Transport of Pesticides. U.S. Environmental Protection Agency, Office of chemical Safety and Pollution 

Prevention, Office of Pesticide Programs, Environmental Fate and Effects Division, Oct. 22, 2009. 

Online at: http://www.epa.gov/oppefed1/models/water/input_parameter_guidance.htm

USEPA. 2009b. Tier I Drinking Water Assessment for Fludioxonil. U.S. Environmental Protection 

Agency, Office of Prevention, Pesticides and Toxic Substances. DP 364264. June 22, 2009.

USEPA. 2009c. Tier II Drinking Water Assessment for the Fludioxonil Proposed Use on Ornamentals. 

U.S. Environmental Protection Agency, Office of Prevention, Pesticides and Toxic Substances. DP 
Page 10 of 11

368586. August 27, 2009.

USEPA. 2010. Development and Use of Percent Cropped Area Adjustment Factors in Drinking Water 

Exposure Assessments. U.S. Environmental Protection Agency, Office of chemical Safety and Pollution 

Prevention, Office of Pesticide Programs, Environmental Fate and Effects Division, September 9, 2010. 

Online at: http://www.epa.gov/oppefed1/models/water/pca_adjustment_dwa.html
Page 11 of 11

APPENDIX A. MODEL OUTPUT FILES

TIER I SURFACE WATER MODELING OUTPUT FILES (FIRST)

 RUN No. 1 FOR fludioxonil ON ornamental * INPUT VALUES * 

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

 RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

 ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

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

 2.000( 2.000) 1 1 991.0 1.5 GROUND( 6.4) 100.0 .0

 FIELD AND RESERVOIR HALFLIFE VALUES (DAYS) 

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

 METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

 (FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.) 

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

 294.90 2 N/A 8.70- 1078.80 .00 1078.80

 UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

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

 PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC) 

 CONCENTRATION CONCENTRATION 

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

 83.845 38.491

TIER I GROUND WATER MODELING 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:Fludioxonil

time is 5/12/2009 15:17:05

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

 Application Number of Total Use Koc Soil Aerobic

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

(days)

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

 2.000 1.0 2.000 1.37E+03 230.0

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

groundwater screening cond (ppb) = 1.98E-01 

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