### Page 1 of 13 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON D.C., 20460

OFFICE OF CHEMICAL SAFETY

AND POLLUTION PREVENTION



### PC Code: 122101

Date: February 2 , 2011

DP Barcodes : 3833 39 , 38334 7

MEMORANDUM

SUBJECT: Potential Impacts to Ecological Risk Assessment of Azoxystrobin as a Result of

the Proposed Label Change to Include the Spray Volume from Aerial

Applications to 0

. 5 Gallon s P er Acre on Soybeans and Wheat

TO: Shaja Joyner , Risk Manager

Shaunta Hill , Risk Manager Reviewer

Registration Division (7505P)

FROM: Reuben Baris, Environmental Scientist

Stephen Carey, Biologist

Environmental Risk Branch VI

Environmental Fate and Effects Division (7507P)

REVIEWED

BY: William P. Eckel, Ph.D, Senior Science Advisor

Environmental Risk Branch V I

Environmental Fate and Effects Division (7507P )

APPROVED

BY: Mark Corbin, Branch Chief

Environmental Risk Branch V I

Environmental Fate and Effects Division (7507P)

The Environmental Fate and Effects Division (EFED) has completed its review of the impact of

the proposed label change to allow ultra

- low volume (ULV) applications of azoxystrobin to

soybeans and wheat via aerial applications using the formulated products Quilt TM XCEL (EPA

Reg. No. 100

- 1324) and Quilt ® (EPA Reg. No. 100

- 1178)

. QUILT TM 

### XCEL and QUILT ®



### fungicides contains two active ingredients (a.i.), azoxystrobin (CAS No. 131860

- 33

- 8) and

propiconazole (CAS No. 60207

- 90

- 1). This document addresses the ecological risks associated

with the addition of ULV to the label as proposed under the Section 3 new use of azoxystrobin

on soybean and wheat . Propiconazole (PC 122101) will be addressed in a separate assessment.

### Page 2 of 13 The maximum sin gle ULV application rate for soybean and wheat evaluated in this assessment is

0.1 to 0. 1 94 lbs a

. i

. /A for QUILT ® 

### and QUILT TM 

### Xcel, respectively (0.2 to 0.38 lbs

a.i./A/season), with a minimum flow rate of 0.5 gallons per acre

, and m inimum reapplication

int erval of 14 days

. For the proposed label change

, including the addition of 0.5 gallon per acre

spray volume application for soybeans and wheat, the estimated risk will be less than previously

assessed by EFED in D380859 for a corn ULV use

. In the previous assessment, t he taxonomic

groups’ RQs that exceeded the Levels of Concern (LOC) for risk resulting from azoxystrobin

ULV applications to corn were aquatic organisms and aquatic non

- vascular plants.

Consequently, the RQs for the proposed action are lower than the RQs for corn use; therefore,

two taxonomic groups (freshwater fish and aquatic non

- vascular plants) were assessed to be

below the LOC when ULV application is used on soybeans and wheat (compared to ULV

applications to corn). The invertebrates, both freshwater and estuarine/marine, remain at risk

when exposed to ULV applications that are treated in soybean, wheat, or corn fields (as assessed

in this document an d in D380859).

Previous EFED drinking water and ecological risk assessments used the default spray drift

assumption of 5% (drift fraction) for aerial applications. Most recently ( September 2010

, D380859 ), EFED completed a combined drinking water and ecolo gical risk assessment that

investigated exposure from ULV sprays to corn (application rate of 0.1 29 lbs a.i./A , 2.0 lbs

a.i./A/yr ; D 380859 ). EFED employed AgDRIFT (version 2.01) modeling to estimate potential

changes in offsite deposition of azoxystrobin a t the edge of field that may result from use of

lower spray volume (0.5 GPA is consider to be an ultra low volume (ULV) application), because

the default spray drift assumptions tend to underestimate off

- site movement of the chemical

when applied at ultra low volumes . The resulting spray drift fraction was input into

PRZM/ EXAMS to provide estimated environmental concentrations (EECs) for use in ecological

risk assessments and drinking water assessments. Risk quotients (RQs) to terrestrial and aquatic

organi sms resulting from the maximum application for soybeans and wheat (0. 194 lbs a.i./A , 1.5

lbs a.i./A/yr , for soybeans) are presented below in Table 1

. RQs from the corn ULV uses are

provided (D380859) as well for comparison.

Conclusions

- Potential Risk to Non

- target Wildlife

Based on all available data, potential acute and chronic risks from the proposed new uses of

azoxystrobin on soybean and wheat are expected for freshwater and estuarine/marine

invertebrates. The potent ial for risks to birds, terrestrial

- phase amphibians, reptiles, mammals,

insects, fish, terrestrial and aquatic plants are anticipated to be minimal.

Table 1 presents the Risk Quotients (RQs) and use patterns used to determine the potential risks

to te rrestrial and aquatic wildlife and plants exposed to azoxystrobin.

### Page 3 of 13 Table 1. Summary of Risk Quotient Calculation for Azoxystrobin Exposures to Terrestrial and

Aquatic Organisms and Plants.*

Species Azoxystrobin Use Pattern and RQs Summary for Soybean and Wheat Use

(Including Corn Use)

. Soybean and Wheat ULV Corn ULV

Aquatic Organisms and Plants

Fish (and aquatic

- phase

amphibians) Acute RQ : 0.04

Chronic RQ: <0.1 Acute RQ : 0.054

Chronic RQ: <0.1

Freshwater

Invertebrates Acute RQ : 0.07

Chronic RQ : 0.3 Acute RQ : 0.098

Chronic RQ : 0.6

Marine/estuarine Fish Acute RQ : 0.03

Chronic RQ : no data Acute RQ : 0.04

Chronic RQs: no data

Marine/estuarine

Invertebrates Acute RQ : 0.32

Chronic RQ: 1.9 Acute RQ : 0.45

Chronic RQ: 2.6

Aquatic Vascular Plants Non

- Listed Plant RQ: <0.1

Listed Plant RQ: <0.1 Non

- Listed Plant RQs: <0.1

Listed Plant RQs: <0.1

Aquatic Non

- Vascular

Plants Non

- Listed Plant RQ: 0.4

Listed Pla nt RQ : 0.9 Non

- Listed Plant RQ: 0.5

Listed Plant RQ : 1.3

Terrestrial Animals and Plants

Birds (and terrestrial

phase amphibians and

reptiles) Not assessed; RQs anticipated to be

below the LOC based on results of

corn ULV applications with higher

EECs. Acute RQs: <0.01 1



### Chronic RQs: <0.1

– 0.2 1



### Mammals Acute RQs: <0.01 1



### Chronic RQs: <0.1

– 0.7 1



### Terrestrial Plants Non

- Listed Plant RQs: N.R. 2



### Listed Plant RQs: N.R.

* Bold entries indicate LOC exceedance or concern

1 Corn ULV application risk quotients (current uses) for terrestrial animals and plants were derived from

D380859

2 N.R.

– not reported or not assessed at that time



### Conclusions

- Listed Species

Based on estimated maximum application rates, exposure levels and available effects data,

azoxystrobin used as a fungicide for prevention and control of certain diseases in soybean and

wheat indicates direct effects LOC exceedances for freshwater and estuarine/marine

invertebrates. Such findings suggest a potential concern for indirect effects to listed animal and

plant species with both narrow (i.e., species that are obligat es or have very specific habitat or

feeding requirements) and general dependencies (i.e., cover type requirements) on aquatic

invertebrates as a resource or important habitat component. Therefore, there is a potential for

indirect effects to all animal and plant taxonomic groups (i.e., mammal, bird, amphibian, reptile,

fish, c rustacean, mollusks, and gastropods ) that depend on those aquatic invertebrates as food

resources to survive, grow, and reproduce and are presented in Table 2

.

### Page 4 of 13 Table 2. Potential L i sted S pecies R isks A ssociated with D irect or I ndirect E ffects due to

the U se of A zoxystrobin on Soybean and Wheat

.

Listed Taxon Direct Effects from

Acute Exposures Direct Effects from

Chronic Exposures Indirect Effects

Aquatic

Aquatic non

- vascular plants No N/A No

Aquatic vascular plants No N/A No

Freshwater invertebrates Yes No Yes

Marine/estuarine

invertebrates Yes Yes Yes

Freshwater fish No No Yes

Marine/estuarine fish No No Yes

Aquatic

- phase amphibians 1 

### No No Yes

Terrestrial

Semi

- aquatic plants

-

monocots No N/A No

Semi

- aquatic plants

- dicots No N/A No

Terrestrial plants

– monocots No N/A No

Terrestrial plants

- dicots No N/A No

Insects No N/A No

Birds No No Yes

Terrestrial

- phase amphibians No No Yes

Reptiles No No Yes

Mammals No No Yes

N/A

- indicates that this exposure route is not assessed.

1 Freshwater fish acts as a surrogate for aquatic

- phase amphibians

2 Bird acts as a surrogate for terrestrial

- phase amphibians



### Modeling Approach for ULV Uses

Currently, EFED does not have approved methodology in place to assess the influence of ULV

on ecological exposure assessments. It is anticipated that due to finer drop size spectrum and

lower application volumes that the drift fraction will increase for UL V methods of application

compared to other methods of application. The requested minimum spray volume is 0.5 gallons

per acre with an oil carrier. The following modeling approach was used to estimate aquatic

exposure concentrations from the addition of UL V applications using AgDRIFT . Two

azoxystrobin applications of 0.194 lbs a.i./A with a 14

- day reapplication interval were run with

PRZM/EXAMS using the standard Missouri soybean scenario and the AgDRIFT drift fraction

input to obtain aquatic EECs for the p roposed ULV use for soybeans and wheat ( Table 6 )

.

### Page 5 of 13 Estimate of ULV Drift Fraction

AgDrift Model (Version 2.01) with ASAE aerosol to very fine drop let size and Tier 2 aerial

agricultural drift option was used to estimate drift. All parameters were default for the AgDrift

ASAE aerosol to very fine drop size template with the exception of spray material. Spray

material values were determined ( in Table 3 ) and the calculation option implemented. The

aquatic assessment was run for Tier 2 aerial application with the user selected water body option

selected (EPA defined pond) for the aquatic assessment

.

Table 3. Estimates of Spray Drift Fraction for ULV using AgDrift (Version 2.01)

Spray material: Maximum

(fl.oz. / A) Quilt ®



### (7% ai) Quilt TM 

### Xcel

(13.5% ai) Drift Fraction

[fraction of applied]

Non

- Volatile Rate (lb/A) 1 

### : 21 Max. fl.oz./A 0.328 0.328

Active Rate (lb/A) 2 

### : 0.02296 2 

### 0.04428 3



### Spray Volume Rate (gal/A) 0.5 0.5

Carrier Oil Oil

Aquatic 0.503 (or 50%)

1 Non

- volatile rate = (14 fl oz / A ÷ 128 fl oz / gal) ÷ 0.5 gallons / A [lbs/A]

2 Active rate = 0. 328 lb / A * fraction a.i. (0.07) = 0.0 2296

3 Active rate = 0. 328 lb / A * fraction a.i. (0.135) = 0.0 4428



### In addition, the drift fraction in this assessment is higher than previously estimated for ULV

applications to corn ( 50% vs

. 27%, respectively) . This is due in large part to the selection of the

droplet size distribution (DSD); the corn ULV assessment used “very fine to fine” DSD, while

this assessment selected “ae rosol to very fine” DSD

. The aerosol to very fine DSD better

represents the spray volume for the ULV applications.

PRZM/EXAMS Model Inputs

Input parameters for aquatic exposure modeling (PRZM

- EXAMS) were derived from previous

risk assessments

. Model input parameters are presented below in Table 4

.

The chemical application method (CAM) used for PRZM modeling is 2, which is interception

based upon canopy and default soil incorporation depth of 4 cm ( Table 4 ). The spray drift

fraction estimated for the aquatic assessment is 0. 503

, calculated using AgDrift 2.01 consider ing

the application as ULV.

### Page 6 of 13 Table 4 . Summary of E nvironmental F ate P arameters for A zoxystrobin and V alues

U sed for PRZM/EXAMS M odeling.

Parameter Range Value Used Source

Solubility in water 6.7 mg/L @ pH 7; 20 oC 6.7 mg/L MRID 43678105

Vapor Pressure 8.2 x 10

- 13 torr 8.2 x 10

- 13 torr MRID 43678105

Hydrolysis t 1⁄2 (at 25 **°** C) stable at pH5, 7, 9 0 days MRID 43678172

Aquatic Photolysis, t 1⁄2 (half

- life) t 1⁄2 = 11.1, 16.6, and 17.1

days 23.23 (90 th percent

upper confidence bound

on mean T 1⁄2 MRID 43678173

Soil Photolysis DT 50 = 11 days

t 1⁄2 = 17.6 to 28.4 days. Not currently used in

PRZM MRID 43678174

Aerobic Soil

Metabolism, t 1⁄2 72, 85, 164 days

mean = 107 days

std = 49.79

median = 85 90 percent upper bound

on mean = 161.2 day MRID 43678175,

44046801

Aerobic Aquatic

Metabolism, t 1⁄2 none available 2 x aerobic soil

metabolism

2 x 161.2 = 322.2 days EFED, 2009

Anaerobic Aquatic

Metabolism, t 1⁄2 50 to 59 days

(soil

- water system) 62.3 days 90 % upper

bound MRID 43678175

(Supplemental)

Sorption K d 2.1, 4.3, 6.0, 9.0, 12.0, 20.0,

and 36.0 mL/g; mean =

12.68 mL/g 12.68 mL/g MRID 43678178

MRID 43678181

Sorption Koc 300, 360, 710, 720, 760,

1490, 1690 mL/g

oc ; mean =

841.25 mL/g

oc Not used in assessment MRID 43678178

MRID 43678181

Spray Drift PRZM variable

Spray Drift (DRFT) 0.50 (ULV) 1 EFED. 2009

Application Efficiency PRZM variable 0.95 (APPEFF) EFED. 2009

Foliar Wash

- Off PRZM variable 0.5 (FEXTRC) EFED. 2009

CAM (chemical

application method) 2

– interception on crop

canopy (PRZM variable) ULV Label Directions

DEPI (depth of soil

incorporation) Default by model 4 cm

1 Drift estimated with AgDrift Version (2.01), Tier II Aquatic Assessment (oil carrier) , 10 mph wind speed

.



### Scenario Selection

The MS soybean scenario was used for the ULV assessment because it provides conservative

estimates of runoff resulting from applications to soybeans ( Tables 5 and 6 ).

Table 5 . Use (crop), Modeling S cenario, M eteorological F ile, C rop E mergence,

M aturity and H arvest D ates, and D ate of F irst A pplication.

Crop Scenario Met file Dates(mn

- day):

Emergence/Maturity/Harvest Application date

(m m

- d d )

Soybean

and Wheat MS soybean W03940.dvf 04

- 16/09

- 01/10

- 10 0 1

- 0 5

### Page 7 of 13 Tier II PRZM/EXAMS Modeling

Tier II PRZM/EXAM modeling was conducted using the MS soybean scenario to estimate

aquatic exposure resulting from applications to soybeans and wheat. PRZM/EXAMS results are

summarized in Table 6

.

Table 6 . Surface Water EECs for Aquatic Exposure using PRZM/EXAMS Resulting

from the ULV Application of Azoxystrobin to Soybean and Wheat.

Scenario Method Spray Drift

(Fraction) Minimum

Reapplicatio

n Interval

(days) Number and

Application

Rate

(lb a.i./A) 1 in 10 yr

Peak

(μg/L) 21

- day

mean

(μg/L) 60

- day

mean

(μg/L)

MS soybean ULV 1 

### 0. 5 2 

### 14 2 3 

### @ 0.194 4 

### 18.8 17.9 16.6

1 ULV

– Ultra

- low volume application

2 ULV spray drift fraction estimated with AgDrift (Version 2.01)

3 Maximum number of applications at maximum rate proposed for application to wheat and soybean by ULV ( 42 fl oz

product/ A /season)

4 Maximum single azoxystrobin application rate for soybean and wheat by ULV



### Risk Characterization

For the proposed label change including the addition of 0.5 gallon per acre spray volume

application for soybeans and wheat, the estimated risk will be less than previous ly assessed for

corn ULV use by EFED in D380859. Consequently, t he RQs for the proposed action are lower

than the RQs for corn use; therefore, EFED does not expect that the proposed action will result in

additional risk to terrestrial and aquatic organism s. With aquatic organisms and non

- vascular

plants potentially at risk in the previous assessment for corn ULV uses, results for the other

taxonomic groups that did not exceed the LOCs with higher RQs are not discussed in this

assessment. To add ULV applications for soybean and wheat uses, this assessment focuses on

aquatic organisms and non

- vascular plants only. Tables 7 , 8

, and 9 compare the proposed action

EECs and associated RQs with the previously assessed ULV applications to corn. Results of the

comparison with aquatic organisms and non

- vascular plants indicate lower RQs for the proposed

action; however, it is noted that as oppose to corn ULV use, for freshwater fish and aquatic non

vascular plants , there are no LOC exceedances for those taxonomi c groups when exposed to

azoxystrobin ULV applications in wheat and soybean fields

.

### Page 8 of 13 Table 7 . Tier II Risk Quotients for Freshwater Organisms for Proposed Azoxystrobin ULV uses

on Soybeans and Wheat

Use

Corn

(#/lb a.i./A)

(Drift

fraction) PRZM

Scenario Peak

EEC 21D

EEC 60D

EEC Freshwater Fish

(LC 50 

### = 0.47 mg a.i./L ;

NOAEC = 0.147 mg a.i./L) Freshwater Invertebrate

(EC 50 

### = 0.26 mg a.i./L ;

NOAEC = 0.044 mg a.i./L)

Acute Chronic Acute Chronic

ULV Applications on Soybeans (proposed action)

2 @ 0.194

(0.5) MS Soybean 18.8 17.9 16.6 0.0 4 < 0.1 0.0 7 0.3

ULV Applications on Corn (D380859)

4 @ 0.129

(0.27) KS Corn 25.45 24.45 22.75 0.054 <0.1 0.098 0.6



### Table 8 . Tier II Risk Quotients for Estuarine/marine Organisms for Proposed Azoxystrobin

ULV Uses on Soybeans and Wheat

Use

Corn

(#/lb a.i./A)

(Drift

fraction) PRZM

Scenario Peak

EEC 21D

EEC 60D

EEC Marine/Estuarine Fish

(LC 50 

### = 0.67 mg a.i./L

NOAEC = no data) Marine/Estuarine Invertebrate

(EC 50 

### = 0.056 mg a.i./L;

NOAEC = 0.0095 mg a.i./L)

Acute Chronic Acute Chronic

ULV Applications on Soybeans (proposed action)

2 @ 0.194

(0.5) MS Soybean 18.8 17.9 16.6 0.0 3 No data 0.32 1. 9

ULV Applications on Corn (D380859)

4 @ 0.129

(0.27) KS Corn 25.45 24.45 22.75 0.04 No data 0.45 2.6

### Page 9 of 13 Table 9 . Tier II Risk Quotients for Aquatic Plants for Proposed Azoxystrobin ULV Uses

on Soybeans and Wheat

Use

Corn

(#/lb a.i./A)

(Drift

fraction) PRZM

Scenario Peak EEC Vascular Aquatic Plant

(EC 50 

### = 3.4 mg a.i./L

NOAEC = 0.8 mg a.i./L) Non

- Vascular Aquatic Plant

(EC 50 

### = 0.049 mg a.i./L;

NOAEC = 0.02 mg a.i./L)

Non

- target 3 

### Listed 4 

### Non

- target 5 

### Listed 6



### ULV Applications on Soybean (Proposed Action)

2 @ 0.194

(0.5) MS Soybean 18.8 <0.1 <0.1 0.4 0.9

ULV Applications on Corn (D380859)

4 @ 0.129

(0.27) KS Corn 25.45 <0.1 <0.1 0.5 1.3



### Input data and model run information for PRZM/EXAMS and AgDRIFT are presented in

Appendi ces A and B , respectively . Specific information on the effects endpoints can be found in

D380859.

### Page 10 of 13 Appendix A. PRZM/EXAMs Model input and Output Data

stored as MSsoy.out

Chemical: AZOXYSTROBIN

PRZM environment: MSsoybeanSTD.txt modified Tueday, 29 May 2007 at 12:58:06

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 05:14:08

Metfile: w03940.dvf modified Tueday, 26 August 2008 at 05:14:14

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 10.13 9.984 9.426 9.014 8.759 4.648

1962 13.2 13.03 12.4 11.19 10.45 6.757

1963 13.64 13.47 12.79 11.95 11.75 7.872

1964 14.54 14.36 13.75 12.61 11.92 8.313

1965 14.34 14.17 13.49 12.22 11.49 8.142

1966 18.28 18.18 17.58 15.99 14.98 9.844

1967 19.03 18.81 18.18 16.96 15.97 10.84

1968 17.24 17.06 16.75 15.35 14.38 10.03

1969 15.18 15 14.32 12.95 12.24 8 .617

1970 14.97 14.79 14.12 12.82 12.08 8.337

1971 16.22 16.03 15.3 13.9 13.07 8.714

1972 15.52 15.33 14.62 13.23 12.46 8.318

1973 14.8 14.62 14.16 12.8 11.97 7.919

1974 13.89 13.72 13.07 12.61 11.84 8.028

1975 15.96 15.76 15.02 13.98 13.34 9.065

1976 17.33 17.14 16.63 15.74 14.91 9.993

1977 15.59 15.41 14.67 13.53 12.85 9.248

1978 17.28 17.08 16.42 14.89 13.93 9.221

1979 16.83 16.64 15.89 15.53 15.42 10.57

1980 18.8 18.59 17.97 16.34 15.22 10.35

1981 17.33 17.15 16.75 15.74 14.98 9.965

1982 15.65 15.47 14.77 14.24 14.04 10.01

1983 21.32 21.08 20.2 18.5 17.28 11.22

1984 17.11 16.92 16.4 15.05 14.29 10.12

1985 15.06 14.88 14.19 12.91 12.23 8.892

1986 17.74 17.53 16.83 15.64 14.74 9.598

1987 15.5 15.31 14.58 13.99 13.3 9.186

1988 14.88 14.7 14.02 12.63 11. 94 8.469

1989 18.35 18.14 17.37 16.61 15.69 10.14

1990 16.73 16.54 15.96 14.59 13.65 9.398

Sorted results

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

0.032258064516129 21.32 21.08 20.2 18.5 17.28 11.22

0.0645161290322581 19.03 18.81 18.18 16.96 15.97 10. 84

0.0967741935483871 18.8 18.59 17.97 16.61 15.69 10.57

0.129032258064516 18.35 18.18 17.58 16.34 15.42 10.35

0.161290322580645 18.28 18.14 17.37 15.99 15.22 10.14

0.193548387096774 17.74 17.53 16.83 15.74 14.98 10.12

0.225806451612903 17.33 17.15 16.75 15.74 14.98 10.03

0.258064516129032 17.33 17.14 16.75 15.64 14.91 10.01

0.290322580645161 17.28 17.08 16.63 15.53 14.74 9.993

0.32258064516129 17.24 17.06 16.42 15.35 14.38 9.965

0.354838709677419 17.11 16.92 16.4 15.05 14.29 9.844

0.387096774193548 16.83 16.64 15.96 14.89 14.04 9.598

0.419354838709677 16.73 16.54 15.89 14.59 13.93 9.398

0.451612903225806 16.22 16.03 15.3 14.24 13.65 9.248

0.483870967741936 15.96 15.76 15.02 13.99 13.34 9.221

0.516129032258065 15.65 15.47 14.77 13.98 13.3 9.186

0.5483870967 74194 15.59 15.41 14.67 13.9 13.07 9.065

0.580645161290323 15.52 15.33 14.62 13.53 12.85 8.892

### Page 11 of 13 0.612903225806452 15.5 15.31 14.58 13.23 12.46 8.714

0.645161290322581 15.18 15 14.32 12.95 12.24 8.617

0.67741935483871 15.06 14.88 14.19 12.91 12.23 8.469

0.70 9677419354839 14.97 14.79 14.16 12.82 12.08 8.337

0.741935483870968 14.88 14.7 14.12 12.8 11.97 8.318

0.774193548387097 14.8 14.62 14.02 12.63 11.94 8.313

0.806451612903226 14.54 14.36 13.75 12.61 11.92 8.142

0.838709677419355 14.34 14.17 13.49 12.61 11.84 8.028

0.870967741935484 13.89 13.72 13.07 12.22 11.75 7.919

0.903225806451613 13.64 13.47 12.79 11.95 11.49 7.872

0.935483870967742 13.2 13.03 12.4 11.19 10.45 6.757

0.967741935483871 10.13 9.984 9.426 9.014 8.759 4.648

0.1 18.755 18.549 17.931 16.583 15 .663 10.548

Average of yearly averages: 9.0608

Inputs generated by pe5.pl

- Novemeber 2006

Data used for this run:

Output File: MSsoy

Metfile: w03940.dvf

PRZM scenario: MSsoybeanSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: AZOXYSTROBIN

Description Variable Name Value Units Comments

Molecular weight mwt 403 g/mol

Henry's Law Const. henry atm

- m^3/mol

Vapor Pressure vapr 8.2E

- 13 torr

Solubility sol 6.7 mg/L

Kd Kd 12.68 mg/L

Koc Koc mg/L

Photolysis half

- life kdp 23.23 days Half

- life

Aerob ic Aquatic Metabolism kbacw 322.2 days Halfife

Anaerobic Aquatic Metabolism kbacs 62.3 days Halfife

Aerobic Soil Metabolism asm 161.2 days Halfife

Hydrolysis: pH 5 0 days Half

- life

Hydrolysis: pH 7 0 days Half

- life

Hydrolysis: pH 9 0 days Half

- life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI 4 cm

Application Rate: TAPP 0.217 kg/ha

Application Efficiency: APPEFF 0.95 fraction

Spray Drift DRFT 0.5 fraction of application rate applied to pond

Application Date Date 01

- 05 dd/mm or dd/mmm or d d

- mm or dd

- mmm

Interval 1 interval 14 days Set to 0 or delete line for single app.

app. rate 1 apprate 0.187 kg/ha

Record 17: FILTRA

IPSCND 1

UPTKF

Record 18: PLVKRT

PLDKRT

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

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

### Page 12 of 13 Appendix B. AgDRIFT Model Inputs and Outputs

AgDRIFT® Input Data Summary

-- General

--

Tier: II

Title: Untitled

Notes:

Calculations Done: Yes

Run ID: AgDRIFT® soy50.agd 2.01 01

- 13

- 2011 10:36:58

Default values appear when they differ from the Current values.

-- Aircraft

-- ---------- Current

----------- ---------- Default

----

-------

Name Air Tractor AT

- 401

Type Slow Fixed

- wing

Boom Length (%) 76.3

Boom Height (ft) 10

Flight Lines 20

-- Drop Size Distribution

-- ---------- Current

----------- ---------- Default

--- -

------- Name Aerosol to Very Fine ASAE Fine to

Medium

Type Basic

Drop Categories # Diam (um) Frac Diam (um)

Frac

1 10.77 0.0280 10.77

0.0010

2 16.73 0.0350 16.73

0.0003

3 19.39 0.0300 19.39

0.0007

4 22.49 0.0200 22.49

0.0003

5 26.05 0.0210 26.05

0.0007

6 30.21 0.0460 30.21

0.0010

7 35.01 0.0780 35.01

0.0010

8 40.57 0.1060 40.57

0.0020

9 47.03 0.1250 47.03

0.0033

10 54.50 0.1240 54.50

0.0053

11 63.16 0.0860 63.16

0.0067

12 73.23 0.0610 73.23

0.0090

1 3 84.85 0.0700 84.85

0.0133

14 98.12 0.0710 98.12

0.0223

### Page 13 of 13 15 113.71 0.0540 113.71

0.0330

16 131.73 0.0270 131.73

0.0393

17 152.79 0.0060 152.79

0.0480

18 177.84 0.0020 177.84

0.0647

19 205.84 0.0100 205.84

0.0830

-- Swath

-- ---------- Current

----------- ---------- Default

----

-------

Swath Width 60 ft

Swath Displacement 0.6506 x Swath Width 0.3702 x

Swath Width

-- Spray Material

-- ---------- Current

----------- ---------- Default

----

-------

Nonvolatile Rate (lb/ac) 0.328

0.501

Active Rate (lb/ac) 0.0443

0.2505

Spray Volume

Rate (gal/ac) 0.5

2

Carrier Type Oil

Water

-- Meteorology

-- ---------- Current

----------- ---------- Default

----

------- Wind Speed (mph) 10

Temperature (deg F) 86

Relative Humidity (%) 50

-- Tr ansport

-- ---------- Current

----------- ---------- Default

----

-------

Flux Plane (ft) 0