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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON D.C., 20460

OFFICE OF CHEMICAL SAFETY

AND POLLUTION PREVENTION

 

PC Code: 122101

Date: February 7, 2011

DP Barcodes: 383340, 383346

MEMORANDUM

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

the Proposed Label Change to Include the Spray Volume from Aerial 

Applications to 0.5 Gallons Per 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 VI

Environmental Fate and Effects Division (7507P)

APPROVED

BY: Mark Corbin, Branch Chief

Environmental Risk Branch VI

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 propiconazole to 

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

Reg. No. 100-1324) and Quilt® (EPA Reg. No. 100-1178). QUILTTM 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 propiconazole

on soybean and wheat. Azoxystrobin (PC 128810) will be addressed in a separate assessment. 

The maximum single ULV application rate for soybean and wheat evaluated in this assessment is 

0.08 to 0.17 lbs a.i./A for QUILT® and QUILTTM Xcel, respectively (0.16 to 0.34 lbs 
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a.i./A/season), with a minimum spray volume of 0.5 gallons per acre, and minimum reapplication 

interval 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 for listed aquatic nonvascular plants is higher than previously assessed by EFED in D375061 and D375062 for a corn 

ULV use. In the previous assessment (ULV application to corn), the Level of Concern was 

exceeded only for estuarine/marine invertebrates. Therefore, EFED assessed exposure to aquatic 

organisms and plants including terrestrial plants from propiconazole ULV applications to 

soybeans and wheat to investigate the impact of the proposed action on the risk to terrestrial and 

aquatic organisms and plants.

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

assumptions of 16% and 5% (drift fraction, respectively) for aerial applications. Most recently 

(August 2010, D375061 and D375062), EFED completed a combined drinking water and 

ecological risk assessment that investigated exposure from ULV sprays to corn (maximum single 

application rate of 0.1125 lbs a.i./A; D375061 and D375062). EFED employed AgDRIFT 

(version 2.01) modeling to estimate potential changes in offsite deposition of propiconazole at 

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. To estimate 

offsite deposition from use of ULV applications, the Aerosol to Very Fine droplet size 

distribution (DSD) was modeled to capture the potential smaller droplets from ULV spray 

applications. However, it is possible that the droplet size used in this analysis could under- or 

over-estimate the risk since the actual droplet size from the proposed use is unknown. The 

resulting spray drift fraction using the Aerosol to Very Fine DSD was input into PRZM/EXAMS 

and TerrPLANT to provide estimated environmental concentrations (EECs) for use in ecological 

risk assessments and drinking water assessments. Risk Quotients (RQs) for terrestrial and aquatic 

organisms resulting from the maximum application for soybeans and wheat (0.17 lbs a.i./A, 0.34

lbs a.i./A/yr, for soybeans) are presented below in Table 1. RQs from the corn ULV uses

(D375061 and D375062) and peanut non-ULV uses (D313258) are provided as well for 

comparison. 

Conclusions - Potential Risk to Non-target Wildlife 

Based on all available data, potential acute risk from the proposed new uses of propiconazole on 

soybean and wheat are expected for estuarine/marine invertebrates and listed aquatic nonvascular plants. Chronic risk is not anticipated for estuarine/marine invertebrates and aquatic 

non-vascular plants. The potential for risks to birds, terrestrial-phase amphibians, reptiles, 

mammals, insects, fish, freshwater invertebrates, terrestrial plants, aquatic vascular plants, and 

non-listed aquatic non-vascular plants are anticipated to be minimal.

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

to terrestrial and aquatic wildlife and plants exposed to propiconazole. 
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Table 1. Summary of Risk Quotient Calculation for Propiconazole Exposures to Terrestrial 

and Aquatic Organisms and Plants.*

Species Propiconazole 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: 0.02

Chronic RQ: 0.2

Highest Acute RQ: <0.01

Highest Chronic RQ: 0.11

Freshwater Invertebrates Acute RQ: 0.01

Chronic RQ: 0.07

Highest Acute RQ: <0.01

Highest Chronic RQ: 0.05

Marine/estuarine Fish Acute RQ: <0.01

Chronic RQ: 0.4

Highest Acute RQ: <0.01

Highest Chronic RQ: 0.3

Marine/estuarine 

Invertebrates 

Acute RQ: 0.16

Chronic RQ: 0.33

Highest Acute RQ: 0.12 

Highest Chronic RQ: 0.23A

Aquatic Vascular Plants Non-target RQ: <0.01

Listed RQ: 0.05

Not assessed; RQs anticipated to be 

below the LOC based on results of 

corn ULV applications to aquatic 

non-vascular plants. 

Aquatic Non-Vascular 

Plants

Non-target RQ: 0.9

Listed RQ: 1.2

Highest Non-Listed Plant RQ: 0.63

Highest Listed Plant RQ: N.R. B

Terrestrial Animals and Plants 

Birds (and terrestrialphase amphibians and 

reptiles)

Not assessed; RQs anticipated to be 

below the LOC based on results of nonULV applications to peanuts with 

higher EECs.

Highest Acute RQ: 0.06C

Highest Chronic RQ: 0.1 C

Mammals Highest Acute RQ: 0.06 C

Highest Chronic RQ: 0.9 C

Terrestrial Plants Non-target RQs: <0.1 – 0.4

Listed RQs: 0.1 – 0.6

Highest Non-Listed Plant RQ: 0.19 C

Highest Listed Plant RQ: 0.5 C

* Bold entries indicate LOC exceedance or concern

A Not reported or not assessed; thus, for this assessment, the chronic toxicity value for marine/estuarine 

mollusks (Eastern oyster) was estimated via the acute-to-chronic ratio using mysid data. The crustacean 

NOAEC was estimated to be 45 μg/L.

B Not reported or not assessed at that time C Peanut non-ULV application risk quotients (current uses; 2 applications @ 0.225 lb a.i./A) for terrestrial 

animals and plants were derived from D313258. 3 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, 

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

wheat indicates direct effects LOC exceedances for estuarine/marine invertebrates and aquatic 

non-vascular plants. Such findings suggest a potential concern for indirect effects to listed animal 

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

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

estuarine/marine invertebrates and aquatic non-vascular plants as a resource or important habitat 

component. Therefore, there is a potential for indirect effects to those animal and plant 

taxonomic groups (i.e., mammal, bird, amphibian, reptile, fish, crustacean, mollusks, and 

gastropods) that depend on those estuarine/marine invertebrates and aquatic non-vascular plants

as food resources to survive, grow, and reproduce and are presented in Table 2.
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Table 2. Potential Listed Species Risks Associated with Direct or Indirect Effects due to 

the Use of Propiconazole on Soybean and Wheat. 

Listed Taxon Direct Effects from 

Acute Exposures

Direct Effects from 

Chronic Exposures

Indirect Effects

Aquatic

Aquatic non-vascular plants Yes N/A Yes

Aquatic vascular plants No N/A No

Freshwater invertebrates No No Yes

Marine/estuarine invertebrates Yes No Yes

Freshwater fish No No Yes

Marine/estuarine fish No No Yes

Aquatic-phase amphibians1 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 ULV methods of application 

compared to other methods of application. The proposed 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 ULV applications using AgDRIFT. To assess 

exposure to aquatic organisms and plants, two propiconazole applications of 0.17 lbs a.i./A with 

a 14-day reapplication interval were run with PRZM/EXAMS using the Missouri soybean 

scenario (MSsoybeanSTD.txt) and the AgDRIFT drift fraction input to obtain aquatic EECs for 

the proposed ULV use for soybeans and wheat (Table 6). For terrestrial exposure, one 

propiconazole application of 0.17 lbs a.i./A was run with TerrPLANT using the AgDRIFT drift 

fraction input to obtain EECs to assess exposure specifically to terrestrial plants. For terrestrial 

animals, risk conclusions are not ULV dependant; thus, results from the previous assessments 

apply to this proposed action. However, the distance from the treated field to where terrestrial 

animals may be exposed to the chemical may increase (i.e., risk may extend farther from the 
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treated area). 

Estimate of ULV Drift Fraction

AgDrift Model (Version 2.01) with ASAE aerosol to very fine drop 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 and terrestrial assessments were run for Tier 2 aerial application with the user selected 

water body option (EPA defined pond).

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

Spray material: Maximum 

(fl.oz./A)

Quilt®

(11.7% ai)

QuiltTM Xcel

(11.7% 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: 0.03842 0.0384

Spray Volume Rate (gal/A) 0.5 0.5

Carrier Oil Oil

Aquatic 0.503 (or 50%)

Terrestrial 0.789 (or 79%) 1

Non-volatile rate = (21 fl oz/A ÷128 fl oz/gal) ÷ 0.5 gallons/A [lbs/A] 2 Active rate = 0.328 lb/A * fraction a.i. (0.117) = 0.0384

The drift fraction in this assessment is higher than previously estimated for ULV applications to 

corn (50% vs. 37%, 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 “aerosol 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 shown 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 considering

the application as ULV. 
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Table 4. Summary of Environmental Fate Parameters for Propiconazole and Values 

Used for PRZM/EXAMS Modeling.

Parameter Input Value and Unit Comment Source

Solubility in water (20oC) 100 mg/L D375061+

Vapor Pressure (20oC) 1.0 x 10-6 torr D375061+

Hydrolysis t1⁄2 (at 25 °C) 0 days Stable D375061+

Aquatic Photolysis, t1⁄2

(half-life) 0 days Stable MRID 41811901

Aerobic Soil 

Metabolism, t1⁄2

69.2 days

Upper 90th percentile on 

the mean half-lives (43, 

47, and 70 days)

MRID 00129912

MRID 00129914

Aerobic Aquatic 

Metabolism, t1⁄2

138.4 days 2x aerobic soil 

metabolism half-life USEPA, 2009

Anaerobic Aquatic 

Metabolism, t1⁄2

0 days Stable MRID 42347902

Organic Carbon 

Partitioning Coefficient 

(Koc)

648 ml/g oc Mean Koc (685, 436, 

382, 604, and 1134) MRID 41811901

Application Rate 

(single maximum for 

soybeans)

0.167 lbs a.i./A

(0.187 kg a.i./ha)

2 applications, 14 day 

interval. Label Directions

Application Efficiency 0.95 -- USEPA, 2009

Spray Drift Fraction 0.51 AgDRIFT v 2.01 --

CAM (chemical 

application method) 2 -- USEPA, 2009

Application Date 

(day/month) 01/05

Applied before R3 

growth stage (label 

directions)

MSU, 2003

1 Drift fraction estimated with AgDRIFT, 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 and wheat (Tables 5 and 6). 

Table 5. Use (crop), Modeling Scenario, Meteorological File, Crop Emergence, 

Maturity and Harvest Dates, and Date of First Application.

Crop Scenario Met file Dates(mm-dd):

Emergence/Maturity/Harvest 

Application 

date(mm-dd)

Soybean 

and Wheat MS soybean W03940.dvf 04-16/09-01/10-10 05-01

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

from the ULV Application of Propiconazole to Soybean and Wheat. 

Scenario Method Spray Drift

(Fraction)

Minimum 

Reapplication 

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 ULV1 0.52 14 23 @ 0.174 18.2 16.9 14.9 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 propiconazole application rate for soybean and wheat by ULV

Measures of Terrestrial Plant Exposure

TerrPLANT is used to calculate EECs for non-target plant species inhabiting dry and semiaquatic areas (Table 7). The active ingredient EECs are based on the application rate, soil 

incorporation, runoff fraction, drift fraction and solubility of the pesticide in water and drift 

characteristics, which depend on application methods. EECs were calculated using one ULV 

application at the rate of 0.17 lb a.i./A with 79 percent spray drift. However, TerrPLANT does 

not consider exposures to plants from multiple pesticide applications, thus, results are based on 

single pesticide applications.

Table 7. EECs for Terrestrial Plants Located Adjacent to Propiconazole Treated Sites. 

Application Rate Application 

Method

Concentration (lbs a.i./A)

Total Loading to 

Areas Adjacent to 

Treated Areas1

Total Loading to SemiAquatic Areas Adjacent 

to Treated Areas2

Drift to 

Adjacent 

Areas3

0.17 lb a.i./A ULV 0.1428 0.2193 0.1343

1 EEC = Sheet Runoff + Drift (79% for ULV) 2 EEC = Channelized Runoff + Drift (79% for ULV) 3 EEC for drift (appl. rate x 79% drift for ULV) 

Risk Characterization

There is no new ecological toxicity or environmental fate data that may affect risk conclusions. 

However, aquatic exposure estimates depend on the crop treated. Tier II EECs were modeled for 

the proposed new uses. EECs and RQs based on ULV drift assumptions using the 50% drift 

fraction were 1.4-fold higher than EECs estimated using the 37% drift fraction for corn ULV 

uses (D375061+). RQ calculations for aquatic organisms and plants from ULV applications to 

soybeans and wheat are presented below (Tables 8, 9, and 10). 

For terrestrial animals, risk conclusions are not crop or ULV dependant; thus, results from 

previous assessments based on the single maximum application rate of 0.225 lbs a.i./A (for 

peanut uses) apply to this proposed new uses (D313258). On the other hand, risk conclusions for 

dicots and monocots are ULV dependant; therefore, terrestrial plants EECs (drift fraction of 79%
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for ULV applications) were modeled using TerrPLANT and AgDRIFT. RQ calculations for 

terrestrial plants from ULV applications to soybeans and wheat are presented below in Table 11. 

The proposed addition of ULV applications for soybeans and wheat for the QuiltTM XCEL (EPA 

Reg. No. 100-1324) and Quilt® (EPA Reg. No. 100-1178) formulated products will result in 

higher estimated risk for certain taxa than previously assessed by EFED in D375061 and 

D375062 for corn ULV use. The RQs for the proposed action are higher than the RQs for corn 

use; therefore, this assessment focuses on those taxonomic groups that are ULV dependent, 

which are aquatic organisms and plants including terrestrial plants. Tables 8, 9, and 10 compare 

the proposed action EECs and associated RQs with the previously assessed ULV applications to 

corn. Results of the comparison indicate higher RQs for the proposed action; thus, it is noted that

additional risk is anticipated for aquatic non-vascular plants when exposed to propiconazole

ULV applications in wheat and soybean fields. 

Table 8. Tier II Risk Quotients for Freshwater Organisms for Proposed Propiconazole ULV 

uses on Soybeans and Wheat

Application,

# apps, @ lb 

a.i./A

(spray drift 

fraction)

PRZM

Scenario

Peak 

EEC

21D 

EEC

60D 

EEC

Freshwater Fish

(LC50 = 850 μg a.i./L ; 

NOAEC = 95 μg a.i./L) 

Freshwater Invertebrate

(EC50 = 1300 μg a.i./L ; 

NOAEC = 260 μg a.i./L)

Acute Chronic Acute Chronic

ULV Applications on Soybeans and Wheat (proposed action)

2 @ 0.17

(0.50)

MS 

Soybean 18.2 16.9 14.9 0.02 0.2 0.01 0.07

ULV Applications on Corn (D375061 and D375062)

2 @ 0.1125

(0.37) TX Corn 13.3 12.0 10.4 <0.01 0.1 <0.01 0.05

Table 9. Tier II Risk Quotients for Estuarine/marine Organisms for Proposed Propiconazole

ULV Uses on Soybeans and Wheat

Application,

# apps, @ lb 

a.i./A

(spray drift 

fraction)

PRZM

Scenario

Peak 

EEC

21D 

EEC

60D 

EEC

Marine/Estuarine Fish 

(LC50 = 2244 μg a.i./L

NOAEC = 36 μg a.i./L)

Marine/Estuarine 

Invertebrate1

(EC50 = 113 μg a.i./L;

NOAEC = 45 μg a.i./L2)

Acute Chronic Acute Chronic

ULV Applications on Soybeans and Wheat (proposed action)

2 @ 0.17

(0.50)

MS 

Soybean 18.2 16.9 14.9 <0.01 0.4 0.16 0.33

ULV Applications on Corn (D375061 and D375062)

2 @ 0.1125

(0.37) TX Corn 13.3 12.0 10.4 <0.01 0.3 0.12 N.R.

1 Based on Easter oysters

2 NOAEC estimated via Acute-to-Chronic ratio

N.R. – not reported or not assessed at that time
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Table 10. Tier II Risk Quotients for Aquatic Plants for Proposed Propiconazole ULV Uses on 

Soybeans and Wheat

Application,

# apps, @ lb 

a.i./A

(spray drift 

fraction)

PRZM 

Scenario

Peak EEC

(μg a.i./L)

Vascular Aquatic Plant

(EC50 = 4828 μg a.i./L

EC05 = 380 μg a.i./L)

Non-Vascular Aquatic Plant

(EC50 = 21 μg a.i./L;

EC05 = 15 μg a.i./L)

Non-target Listed Non-target Listed

ULV Applications on Soybean (Proposed Action)

2 @ 0.17

(0.50) MS Soybean 18.2 <0.01 0.05 0.9 1.2

ULV Applications on Corn (D375061 and D375062)

2 @ 0.1125

(0.37) TX Corn 13.3

Not assessed; RQs anticipated to 

be below the LOC based on 

results of corn ULV applications 

to the more sensitive aquatic 

non-vascular plants.

0.6 N.R.

N.R. – Not reported or not assessed at that time.

Table 11. Risk Quotients for Dry and Semi-Aquatic Area Non-Target and Listed Plants for

Propiconazole ULV Uses on Soybeans and Wheat

Soybeans and Wheat, 

maximum application rate 

(lb a.i./A)

Plants inhabiting 

terrestrial habitats exposed 

to surface water runoff and 

spray drift

Plants inhabiting semiaquatic habitats exposed 

to surface water runoff 

and spray drift

Plants adjacent treated 

areas exposed to spray 

drift

Non-target Listed Non-target Listed Non-target Listed

Monocot

ULV – 0.17 lb a.i./A <0.1 0.1 <0.2 0.2 <0.1 0.1

Dicot

ULV – 0.17 lb a.i./A 0.2 0.4 0.4 0.6 0.2 0.4

Input data and model run information for PRZM/EXAMS, AgDRIFT, and TerrPLANT are 

presented in Appendices A, B, and C, respectively. Specific information on the effects 

endpoints can be found in D375061/D375062.
Page 10 of 14

References

MSU. 2003. Soybean Growth Model. Mississippi State University Extension Service 

(MSUcares), Available online at: (http://msucares.com/deltasoy/gsModelFrame.htm).

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

Transport of Pesticides. U.S. Environmental Protection Agency, Office of Prevention, Pesticides 

and Toxic Substances, Office of Pesticide Programs, Environmental Fate and Effects Division, 

Version 2.1, October 22, 2009. Available online at: 

http://www.epa.gov/oppefed1/models/water/input_parameter_guidance.htm
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Appendix A. PRZM/EXAMs Model input and Output Data

stored as MSsoy.out

Chemical: propiconazole

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 9.015 8.751 7.809 6.772 6.225 3.179

1962 11.38 11.1 10.14 8.654 8.001 5.19

1963 12.44 12.16 11.14 9.85 9.422 6.555

1964 13.35 13.07 12.13 10.64 10.03 7.192

1965 13.56 13.28 12.27 10.74 10.04 7.316

1966 17.37 17.12 16.11 14.01 12.81 8.822

1967 18.13 17.79 16.96 15.09 14.19 10.16

1968 17.02 16.82 16.11 14.23 13.35 9.995

1969 15.56 15.27 14.23 12.63 11.82 8.994

1970 15.08 14.79 13.75 12.2 11.41 8.413

1971 16.03 15.72 14.57 12.73 11.87 8.456

1972 15.36 15.05 13.95 12.3 11.47 8.206

1973 14.81 14.51 13.68 11.96 11.12 7.958

1974 13.92 13.63 12.63 11.65 10.93 7.938

1975 15.78 15.45 14.26 12.61 11.85 8.511

1976 16.5 16.18 15.71 14.15 13.18 9.401

1977 15.37 15.07 13.98 12.55 11.84 9.041

1978 17.04 16.7 15.68 13.66 12.72 9.056

1979 16.6 16.29 15.13 14.24 13.64 9.93

1980 18.56 18.2 17.11 14.86 13.85 10.03

1981 17.7 17.45 16.52 14.72 13.66 9.918

1982 15.44 15.14 14.07 13.34 12.76 9.713

1983 20.9 20.58 19.23 16.87 15.42 10.76

1984 17.27 16.96 16.08 14.41 13.58 10.25

1985 15.48 15.19 14.15 12.59 11.88 9.12

1986 16.7 16.38 15.54 14.16 13.09 9.306

1987 15.51 15.2 14.08 12.91 12.26 9.108

1988 14.98 14.7 13.67 12.06 11.3 8.524

1989 18.21 17.83 16.58 14.94 13.9 9.613

1990 16.66 16.34 15.36 13.52 12.66 9.35

Sorted results

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

0.032258064516129 20.9 20.58 19.23 16.87 15.42 10.76

0.0645161290322581 18.56 18.2 17.11 15.09 14.19 10.25

0.0967741935483871 18.21 17.83 16.96 14.94 13.9 10.16

0.129032258064516 18.13 17.79 16.58 14.86 13.85 10.03

0.161290322580645 17.7 17.45 16.52 14.72 13.66 9.995

0.193548387096774 17.37 17.12 16.11 14.41 13.64 9.93

0.225806451612903 17.27 16.96 16.11 14.24 13.58 9.918

0.258064516129032 17.04 16.82 16.08 14.23 13.35 9.713

0.290322580645161 17.02 16.7 15.71 14.16 13.18 9.613

0.32258064516129 16.7 16.38 15.68 14.15 13.09 9.401

0.354838709677419 16.66 16.34 15.54 14.01 12.81 9.35

0.387096774193548 16.6 16.29 15.36 13.66 12.76 9.306

0.419354838709677 16.5 16.18 15.13 13.52 12.72 9.12

0.451612903225806 16.03 15.72 14.57 13.34 12.66 9.108
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0.483870967741936 15.78 15.45 14.26 12.91 12.26 9.056

0.516129032258065 15.56 15.27 14.23 12.73 11.88 9.041

0.548387096774194 15.51 15.2 14.15 12.63 11.87 8.994

0.580645161290323 15.48 15.19 14.08 12.61 11.85 8.822

0.612903225806452 15.44 15.14 14.07 12.59 11.84 8.524

0.645161290322581 15.37 15.07 13.98 12.55 11.82 8.511

0.67741935483871 15.36 15.05 13.95 12.3 11.47 8.456

0.709677419354839 15.08 14.79 13.75 12.2 11.41 8.413

0.741935483870968 14.98 14.7 13.68 12.06 11.3 8.206

0.774193548387097 14.81 14.51 13.67 11.96 11.12 7.958

0.806451612903226 13.92 13.63 12.63 11.65 10.93 7.938

0.838709677419355 13.56 13.28 12.27 10.74 10.04 7.316

0.870967741935484 13.35 13.07 12.13 10.64 10.03 7.192

0.903225806451613 12.44 12.16 11.14 9.85 9.422 6.555

0.935483870967742 11.38 11.1 10.14 8.654 8.001 5.19

0.967741935483871 9.015 8.751 7.809 6.772 6.225 3.179

0.1 18.202 17.826 16.922 14.932 13.895 10.147

Average of yearly averages: 8.66683333333333

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: propiconazole

Description Variable Name Value Units Comments

Molecular weightmwt 342.33 g/mol

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

Vapor Pressure vapr 1e-6 torr

Solubility sol 100 mg/L

Kd Kd mg/L

Koc Koc 648 mg/L

Photolysis half-life kdp 0 days Half-life

Aerobic Aquatic Metabolism kbacw 138.4 days Halfife

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 69.2 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI 0 cm

Application Rate:TAPP 0.187 kg/ha

Application Efficiency: APPEFF0.95 fraction

Spray Drift DRFT 0.5 fraction of application rate applied to pond

Application Date Date 01-05 dd/mm or dd/mmm or dd-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

IPSCND1

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 13 of 14

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

 13 84.85 0.0700 84.85 0.0133

14 98.12 0.0710 98.12 0.0223

 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) 0.0384 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

--Transport-- ----------Current----------- ----------Default-----------

Flux Plane (ft) 0
Page 14 of 14

Appendix C. TERRPLANT Model Inputs and Outputs

TerrPlant v. 1.2.2

Green values signify user inputs (Tables 1, 2 and 4). 

Input and output guidance is in popups indicated by red arrows.

Table 1. Chemical Identity.

Chemical Name propiconazole

PC code 122101

Use Soybean and Wheat

Application Method aerial

Application Form liquid 

Solubility in Water (ppm) 100

Table 2. Input parameters used to derive EECs.

Input Parameter Symbol Value Units

Application Rate A 0.17 lb a.i./A

Incorporation I 1 none

Runoff Fraction R 0.05 none

Drift Fraction D 0.79 none

Table 3. EECs for propiconazole. Units in lb a.i./A.

Description Equation EEC

Runoff to dry areas (A/I)*R 0.0085

Runoff to semi-aquatic areas (A/I)*R*10 0.085

Spray drift A*D 0.1343

Total for dry areas ((A/I)*R)+(A*D) 0.1428

Total for semi-aquatic areas ((A/I)*R*10)+(A*D) 0.2193

Table 4. Plant survival and growth data used for RQ derivation. Units are in lb a.i./A.

Seedling Emergence Vegetative Vigor

Plant type EC25 NOAEC EC25 NOAEC 

Monocot >1 1 >1 1

Dicot 0.59 0.37 >1 1

Table 5. RQ values for plants in dry and semi-aquatic areas exposed to propiconazole through runoff and/or spra

drift.*

Plant Type Listed Status Dry Semi-Aquatic Spray Drift

Monocot non-listed <0.14 <0.22 <0.13

Monocot listed 0.14 0.22 0.13

Dicot non-listed <0.24 <0.37 <0.23

Dicot listed 0.39 0.59 0.36

*If RQ > 1.0, the LOC is exceeded, resulting in potential for risk to that plant group.