UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON D.C., 20460 

OFFICE OF 

CHEMICAL SAFETY AND 

POLLUTION PREVENTION . 

PC Code: 090099 

DP Barcode: 402603 

MEMORANDUM 

SUBJECT: 

FROM: 

THROUGH: 

TO: 

Pyroxasulfone, Herbicide 

End-Use Product: V-10233, FierceTM Herbicide and Pyroxasulfone 85 WG 

Herbicide. Drinking Water Assessment of Pyroxasulfone Proposed Use on Cotton 

James Hetrick, Ph.D., Senior Science Adviso;..J""""' C. f/-$.-,;£... t/ J I 1 IJ 

Ecological Risk Assessment Branch III 

Environmental Fate and Effects Division 

Dana Spatz, Branch Ch~~~~("':::--:;~~-.31~1...;. Rosanna Louie-iuzwi~:~ment Process 

Ecological Risk Assessment Branch III 

Environmental Fate and Effects Division 

Dan Kenny, Branch Chief 

Herbicide Branch 

Registration Division 

This memorandum provides a drinking water assessment to support the proposed use of 

pyroxasulfone on cotton. Pyroxasulfone is a pre/early post-emergent herbicide in the pyrazole 

class. The maximum single application rate of pyroxasulfone is 0.1115lb a.i./A with a 

maximum seasonal application rate of 0.223 lb a.i./ A. It can be applied using ground or aerial 

spray. Application timing is pre- and early post emergent. Although several of the pyroxasulfone 

products have a mixture of pyroxasulfone and flumioxazin, this drinking water assessment will 

focus only on pyroxasulfone and its degradation products. Flumioxazin exposure in drinking 

water will be addressed in a separate drinking water assessment. 

· EFED recommends that the Health Effects Division use the results from PRZM-GW ground 

water modeling for the human health dietary risk assessment. The EDWCs from PRZM-GW 

modeling are 210 J.lg/L for the daily peak concentration and 174 Jlg/L for the 30 year average 

concentration. 

Pyroxasulfone is mobile (average Koc= 94.75) and persistent (t112= 142 to 533 days) in terrestrial 

and aquatic environments. There are two major degradation products (> 10% of applied 

radioactivity) and 6 minor degradation products (<10% of applied radioactivity) detected in 

• 
2

laboratory metabolism studies. Additionally, there is a high percentage of applied radioactivity 

(8-25% of applied radioactivity) identified as “bound” soil/sediment residues. Because the 

extraction of pyroxasulfone residues was conducted using only acetonitrile/water without the use 

of sequentially harsher soil extractants, there is uncertainty regarding the identity and availability 

of the “bound” soil residues. 

The drinking water assessment is based only on modeling because there are no monitoring data 

for pyroxasulfone. Screening level models using standard exposure scenarios were used to 

estimate concentrations of pyroxasulfone in groundwater and surface water. The modeling was 

conducted for the total pyroxasulfone residues [including parent and the degradation products 5-

difluoromethoxy-1H-pyrazol-4-yl) methanesulfonic acid (M1) and 5-difluoro methoxy-1-methyl3-trifluoromethyl-1H-pyrazol-4- carboxylic acid (M3)] because the degradation products, M1 

and M3, are considered as residues of concern. Estimated drinking water concentrations 

(EDWC) were not corrected for percent cropped area (PCAs) because there are non-agricultural 

uses on the labels. 

Based on Tier II modeling, the EDWC for total pyroxasulfone residues in surface source water is 

not expected to exceed 14.562 μg/L for the 1 in 10 year daily peak, 2.802 μg/L for 1 in 10 year 

annual average, and 1.897 μg/L for the 30 year annual average. Based on Tier I SCIGROW 

modeling, the EDWC in ground water is not expected exceed 6.24 μg/L. The EDWCs from 

PRZM-GW modeling are not expected to exceed 102 μg/L for daily peak concentrations and 

58.5 μg/L for 30 year average concentrations. Because the EDWCs for pyroxasulfone use on 

cotton are lower than the EDWC for pyroxasulfone use on corn, soybean, wheat, fallow, 

bareground, and non-cropped areas, EFED recommends using the EDWCs from the previous 

drinking water assessment in the human health exposure assessment (D365249, D390221). 

Based on Tier II modeling for the preplant application to corn and non-cropped uses, the EDWC 

for parent pyroxasulfone in surface source water is not expected to exceed 16.515 μg/L for the 1 

in 10 year daily peak, 4.462 μg/L for 1 in 10 year annual average, and 2.534 μg/L for the 1 in 10 

year annual average (D365249). The EDWC for total pyroxasulfone residues in surface source 

water is not expected to exceed 16.728 μg/L for the 1 in 10 year daily peak, 7.477 μg/L for the 1 

in 10 year annual average, and 4.570 μg/L for the 1 in 10 year annual average. The EDWC in 

ground water is not expected exceed 1.93 μg/L for pyroxasulfone and 11.4 μg/L for total 

pyroxasulfone residues. The EDWCs from PRZM-GW modeling are not expected to exceed 210 

μg/L for daily peak concentrations and 174 μg/L for 30 year average concentrations (D390221). 

Use Profile 

Pyroxasulfone is an herbicide in the pyrazole class. The registrant is proposing the addition for 

use on cotton for three pyroxasulfone product labels, including the Pyroxasulfone Technical, 

Pyroxasulfone 85 WG Herbicide, and V10233 Herbicide, FierceTM Herbicide (Table 1). The 

V10233 Herbicide is a mixture of pyroxasulfone and flumioxazin. Additionally, pyroxasulfone 

can be tank mixed with 2,4-D, bromacil, chlorsulfuron, dicamba, diuron, chlorpyralid, 

glyphosate, hexinone, imazapic, imazapyr, metsulfuron methyl, norfurazon, oryzalin, 

pendimethalin, picloram, pramitol, simazine, sulfometuron methyl, tebuthiuron, and triclopyr. 
3

The maximum single application rate of pyroxasulfone for cotton is 0.1115 lb ai/A with a 

seasonal maximum rate of 0.223 lb ai/A. Pyroxasulfone can be applied using broadcast or 

banded ground spray as well as aerial spray. Application timing is pre- and early post 

emergent. 

 Table 1: Label Recommended Application Rates, Intervals, and Methods 

Product 

EPA Reg. 

No. 

Application 

Timing 

Application 

Method Application 

Interval 

Single Maximum

Application Rate

(lbs ai/A) 

Maximum 

Seasonal 

Application 

Rate 

(lbs ai/A) 

Pyroxasulfone 

85WG 

63588-92 

Pre-plant, Pre/postemergent, Fall 

application, Dry 

Fertilizer 

Broadcast or Soil 

IncorporatedGround Spray 14 days 0.1115 0.223 

V-10233 

Herbicide 

63588-93 

Fall Burndown 

Spring Burndown 

Broadcast , Band 

or Soil 

IncorporatedGround /Aerial 

Spray 

N/A 0.07880 0.0788 

FierceTM 

Herbicide 

Fall Burndown 

Spring Burndown 

Ground/Aerial 

Spray 

N/A 0.0788 0.0788 

 

The crop uses sites on pyroxasulfone labels include corn (sweet, field, popcorn), soybean, winter 

wheat, and cotton. Additionally, non-crop use sites include fallow land and non-crop areas 

around farms, orchards, and vineyards. Fallow land and crop use treatment requires 

consideration of rotation intervals because of the persistence of pyroxasulfone. Recommended 

rotation intervals into treated fields are 4 months for winter wheat, 8 months for spring wheat, 9 

months for corn, sunflower, dry common beans, canola, 11 months for alfalfa, barley, canola, 

and 12 months for all other crops. 

The pyroxasulfone labels have standard runoff and ground water label advisory statements. 

Additionally, recommended spray drift buffer distances are stated on the V10233 Herbicide label 

(Table 2). 

Table 2: Proposed Spray Drift Buffers 

Product Label Recommended Spray Drift Buffers 

V-10233 Herbicide 

Fierce Herbicide 

Spray Drift Buffers: 

40 ft –non-target plants 

100 ft- emerged cotton plants 

40 ft – surface water 
4

Environmental Fate Assessment 

Pyroxasulfone is mobile (average Koc= 94.75) and persistent (t1/2= 142 to 533 days) in terrestrial 

and aquatic environments (Table 3). The major route of degradation can be associated with 

microbial-mediated degradation. Pyroxasulfone is stable to hydrolysis and photodegradation in 

water and soil. Field dissipation studies indicate rapid dissipation (t1/2= 4 to 35 days) of 

pyroxasulfone. Degradation was identified as a potential route of pyroxasulfone dissipation in 

field studies. Leaching also was identified as a route of dissipation of the metabolite 5-

difluoromethoxy-1H-pyrazol-4-yl) methanesulfonic acid (M1). This degradation product was 

very persistent (extrapolated t1/2~ 8 to 65 years) in laboratory metabolism studies. 

Table 3: Environmental Fate Properties of Pyroxasulfone

PARAMETER VALUE 

Chemical and Physical Properties

Chemical name(s) 

3[(5-difluoromethoxy-1-methyl-3-

trifluoromethylpyrazol-4-yl) methylsulfonyl]-4,5-

dihydro-5,5-dimethylisoxazole 

CAS Number 44739-55-5 

Molecular Weight (grams/mole) 367 g/mole 

Aqueous solubility (at 25C) 3.49 mg/L 

Vapor Pressure 1.8E-8 torr

Henry’s Law Constant 2.65E-9 atm m3/mol 

Environmental Fate Properties

Hydrolysis half life (pH 4, pH 7, pH 9) Stable 

Aqueous photolysis half life 119 days 

Soil photolysis half life Stable (>30 days) 

Aerobic soil metabolism half-lives 142-533 days 

Anaerobic soil metabolism half-lives 145 -156 days 

Aerobic aquatic metabolism half-lives (system) 108 -109 days* 

Anaerobic aquatic metabolism half-lives (system) 69-70 days* 

Soil-water distribution coefficient (Koc) 57-119 

* Calculated from combined residues of the test compound measured in both the aqueous and the 

soil/sediment phases of a given test system. 

Another major degradation product was identified as 5-difluoro methoxy-1-methyl-3-

trifluoromethyl-1H-pyrazol-4- carboxylic acid (M3). Minor metabolites (<10% of applied 

radioactivity) of pyroxasulfone are identified as 3-(5-Difluoromethoxy-3-trifluoromethyl-1Hpyrazol-4-yl methanesulfonyl)-4,5-dihydro-5,5-dimethylisoxazole (M5), 3-(5-difluoromethoxy1-methyl-3-trifluoromethyl-1H-pyrazol-4-yl methanesulfonyl)-4,5-dihydro-5,5-

dimethylisoxazol-4-ol (M6), (5-difluoromethoxy-1-methyl-3-trifluoromethyl-1H-pyrazol-4-yl) 

methanol (M8), 5-difluoromethoxy-3-trifluoromethyl-1H-pyrazol-4-carboxylic acid (M9), 5-

Difluoromethoxy-1-methyl-3-trifluoromethyl-1H-pyrazol-4-carbaldehyde (M10), and [3-5-

Difluoromethoxy-1-methyl-3-trifluoromethyl-1H-pyrazol-4-ylmethanesulfonyl)-4,5-dihydro-5-

methylisoxazol-5-yl] methanol (M11). 
5

Additionally, there was a high percentage of applied radioactivity (8-25% of applied 

radioactivity) in “bound” soil/sediment residues. Because the extraction of pyroxasulfone 

residues was conducted using only acetonitrile/water without the use of sequentially harsher 

extractants, there is uncertainty regarding the identity and availability of the “bound” soil 

residues. 

Surface Water 

The surface water modeling was conducted using PRZM (Version 3.122)/EXAMS (Version 

2.98.04) models. No percent cropped area factor was applied because pyroxasulfone can be used 

in non-agricultural uses. PRZM input parameters on application rates, method, timing are shown 

in Table 4. Model input parameters for total pyroxasulfone residues are shown in Table 5. 

Metabolism half-lives for total pyroxasulfone residues were calculated using a single first order 

(SFO) model for summed residues (pyroxasulfone + M1+M3). 

 

Table 4: PRZM/EXAMS Simulated Application Rates, Method, Timing According to Proposed Label 

Standard 

Scenario 

Label 

Application 

Time 

Scenario 

Emerge 

Date 

(mon-day) 

PRZM 

Application 

Time 

(mon-day) 

Number 

of Apps 

Application 

Interval 

Spray 

Method 

Application Rate 

(lbs/A) 

CA 

Cotton 

Preemerg 5-1 4-25 1 NA Air 0.0788 

 Pre-plant 4-1 1/2 14 Ground 0.1115/0.223 

 Post 5-15 1/2 14 Ground 0.1115/0.223 

 Fall 10-15 1 NA Ground/Air 0.0788 

MS 

Cotton 

Preemerg 5-1 4-25 1 NA Air 0.0788 

 Pre-plant 4-1 1/2 14 Ground 0.1115/0.223 

 Post 5-15 1/2 14 Ground 0.1115/0.223 

 Fall 10-15 1 NA Ground/Air 0.0788 

NC 

Cotton 

Preemerg 6-1 5-20 1 NA Air 0.0788 

 Pre-plant 5-1 1/2 14 Ground 0.1115/0.223 

 Post 6-4 1/2 14 Ground 0.1115/0.223 

 Fall 10-15 1 NA Ground/Air 0.0788 
6

Table 5: PRZM/EXAMS Input Parameters for Pyroxasulfone Total Residues 

Parameter Pyroxasulfone 

Total Residues 

(Parent, M1,M3)

Comment Reference 

Aerobic Soil Metabolism 

Half-life (days) 1055 90th percentile 

of mean 

47701736 

47701737 

Organic Carbon Partition 

Coefficient (Koc) (mL/ goc) 94.75 Average 47701742 

Aerobic Aquatic 

Half-Life (days) 270 90th percentile of mean 47701740 

Anaerobic Aquatic 

half-life (days) 157 90th percentile of mean 47701741 

Aqueous Photolysis 

half-life (days) Stable 47701734 

Hydrolysis 

half-life (days) Stable 47701733 

Molecular Weight (g/mole) 367 Physical Property 

Henry’s Law constant 

(atm-m3

/mol) 2.65E-9 

Water Solubility @ 25°C 

(mg/L) 3.49 

Vapor Pressure (torr) 1.8E-8 

Spray Drift Adjustments for Label Recommended Spray Drift Buffers 

Spray drift fractions were recalculated to account for the recommended drift buffers on the V10233 Herbicide label. Because the spray drift fraction will be lower when considering a 100-

foot buffer, only the 40-foot buffer is discussed below. The spray drift values were recalculated 

using the spray drift adjustment equations cited in Jones, et al. 2010 (Table 6). 

 
7

Table 6: Spray Drift Fractions for Proposed Aquatic Spray Drift Buffers 

Buffer 

Size (ft) 

Spray Spray Drift 

Fraction in 

Stream 

(SDS) 

Spray Drift 

Fraction in 

Reservoir 

(SDR) 

Spray Drift 

Fractions 

without a Buffer 

Adjusted Spray 

Drift Fraction for 

Buffer 

40 Aerial 0.1751 0.0704 0.016 0.0941 

Adjusted Spray Drift Fraction= (SDS*0.60)+(SDR*5.248)/5.248 

Pyroxasulfone EDWCs 

Non-PCA corrected estimated drinking water concentrations for pyroxasulfone in surface 

source drinking water are shown in Table 7. 

Table 7: Non-PCA Corrected Drinking Water Concentrations of Pyroxasulfone 

Standard 

Scenario 

Label 

Application 

Time 

Number 

of Apps 

Method 

of App 

Spray 

Drift 

Buffer 

(feet) 

App 

Rate 

(lbs/A) 

Estimated Concentration 

(ug/L) 

1 in 10 yr 

Peak 

1 in 10 yr 

Annual 

Average 

30 year 

Annual 

Average 

CA Cotton Preemerg 1 Air 40 0.0788 1.096 0.392 0.182 

Pre-plant 1 Air 40 0.0788 1.551 0.595 0.274 

1 Ground None 0.1115 2.124 0.805 0.334 

2 Ground None 0.1115 3.654 1.336 0.613 

Post Plant 1 Ground None 0.1115 0.533 0.240 0.209 

2 Ground None 0.1115 1.325 0.691 0.588 

Fall 1 Ground None 0.1115 2.183 0.839 0.574 

1 Air 40 0.0788 1.593 0.623 0.441 

NC Cotton Preemerg 1 Air 40 0.0788 4.085 1.086 0.676 

Pre-plant 1 Air 40 0.0788 3.787 1.082 0.642 

1 Ground None 0.1115 5.461 1.565 0.912 

2 Ground None 0.1115 9.698 2.675 1.897 

Post Plant 1 Ground None 0.1115 5.921 1.458 0.768 

2 Ground None 0.1115 10.396 2.773 1.655 

Fall 1 Ground None 0.1115 8.506 2.236 1.544 

1 Air 40 0.0788 5.850 1.544 1.075 

MS Cotton Preemerg 1 Air 40 0.0788 1.238 0.864 0.640 

Pre-plant 1 Air 40 0.0788 7.287 1.240 0.550 

1 Ground None 0.1115 10.613 1.803 0.786 

2 Ground None 0.1115 14.562 2.802 1.505 

Post Plant 1 Ground None 0.1115 6.904 1.159 0.506 

2 Ground None 0.1115 9.368 1.823 0.927 

Fall 1 Ground None 0.1115 7.409 1.200 0.666 

1 Air 40 0.0788 5.121 0.832 0.470 
8

Ground Water 

Concentration of pyroxasulfone residues in ground water were estimated using the Screening 

Concentration In Ground Water model (SCI-GROW) (Version 2.3) and PRZM-GW(Version 1). 

SCI-GROW 

The input parameters for SCI-GROW modeling are shown in Table 8. The maximum 

concentration of pyroxasulfone in ground water is not expected to exceed 6.24 μg/L (Table 9). 

Table 8: Input Parameters for SCI-GROW Modeling 

Parameter Pyroxasulfone 

Total Residue 

Comment Reference 

Aerobic Soil Metabolism Halflife (days) 1055 90th

percentile 

47701736 

47701737

Organic Carbon Partition 

Coefficient (Koc) (mL/ goc) 94.75 Average 47701742

Application Rate (lbs/A) 0.1115 Label 

Application Number 2 Label 

Table 9: SCI-GROW Concentration 

Pesticide Concentration 

(ug/L) 

Pyroxasulfone Total Residue 6.24 

PRZM-GW Modeling 

The PRZM GW model uses the Pesticide Root Zone Model (PRZM) to estimate pesticide 

leaching in several vulnerable soils. It is built as a Visual Basic tool that generates input files for 

PRZM, runs PRZM, and performs some post processing. A 30 year daily time series file is 

produced as the main output product. 

In the conceptual model, a pesticide is applied to a crop and hydrological processes drive the 

pesticide through the ground and into aquifer positioned at a depth below the surface (scenario 

dependent). The pesticide sorbs and degrades as it travels through the profile with surface 

degradation declining in proportion to a depth of 1 meter where the surface degradation is 

assumed to be zero. Hydrolysis is the only degradation considered in the subsoil (>1 meter 

depth) and in the aquifer. Output concentrations are taken as the vertical spatial average of the 

(saturated) aquifer from 9 to 10 meters. Thirty year time series output files are produced from 

PRZM-GW. 
9

The modeling was conducted on standard leaching scenarios in NC, GA, FL, DE, and WI. These 

scenarios are representative of vulnerable soils in agriculture areas. Model input parameters in 

PRZM GW are shown in Table 10. The aerobic and hydrolysis half-lives were estimated for 

parent and its degradation products M1 and M3.

Table 10: PRZM GW Tier II Model Input Parameters 

for Pyroxasulfone Residues (Parent +M1+M3) 

Input 

Parameter 

Value Source 

Application 

Rate 

0.1115 lbs ai/A Label 

Application 

Interval 

14 days Label 

Hydrolysis 

Half-life 

Stable 47701733 

Soil Half-life 1055 days 47701736 

47701737

Koc 94.75 L/g-OC 47701742

Model Output 

Tier II PRZM GW modeling indicate that pyroxasulfone and its degradation products have a 

potential to leach into the ground water (Table 11). The estimated pyroxasulfone residue 

concentration is substantially higher than the Tier I SCIGROW estimates. This result is not 

unexpected because the persistence and mobility of pyroxasulfone residues allows accumulation 

of residues in ground water. 

Table 11. PRZM-GW Estimates of Pyroxasulfone for the Proposed New Uses. 

Pyroxasulfone SCI-GROW 

(μg/L) 

PRZM-GW 

(μg/L) 

Scenario Peak Average 

2 application @ 0.1115 lbs a.i./acre 

FLORIDA - potato - Met File (13889.dvf) Jacksonville 

6.24 

27.1 23.5 

DELMARVA sweet corn - Evesboro sandy loam 50.5 39.2 

Wisconsin Corn - WI Central Sands 102 87.4 

Florida Citrus - FL Central Ridge, Polk County - (Tampa) 

Met File (12842.dvf) - Astatula sand, hrgb A 56.6 42.2 

NC Eastern Coastal Plain - Norfolk loamy sand - Cotton 58.5 46.1 

GA - Southern Coastal Plain, Tifton loamy sand - Peanuts 25.7 21.1 
10

Monitoring Data 

There are no water monitoring data for pyroxasulfone. 

Uncertainty 

There is a high percentage of applied radioactivity (8-25% of applied radioactivity) identified as 

“bound” soil/sediment residues. Because the extraction of pyroxasulfone residues was 

conducted using only acetonitrile/water without the use of sequentially harsher soil extractants, 

there is uncertainty regarding the identity and availability of the “bound” soil residues. 

Additionally, the major degradation product M1 is very persistent in aerobic soil metabolism 

studies. The modeling was conducted for pyroxasulfone residues including parent 

pyroxasulfone, M1, and M3). Although the incorporation of bound residues would increase 

(~2X) half-lives of pyroxasulfone in soil and aquatic environments, the pyroxasulfone residue 

half-lives used in this exposure assessment (157 to 1055 days) represent a persistent compound. 

Additionally, the EDWCs in ground water and surface are not expected to substantially change 

for half-lives exceeding 1 year. 
11

APPENDIX 

CA Cotton 

Pre-emergent, Aerial 

stored as 1Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.3029 0.2991 0.2837 0.2518 0.229 0.1019 

1962 0.3424 0.3381 0.3208 0.2855 0.2605 0.1332 

1963 1.496 1.478 1.402 1.244 1.136 0.5299 

1964 0.5041 0.4985 0.4748 0.4248 0.3893 0.2593 

1965 0.3731 0.3687 0.35 0.3113 0.2849 0.158 

1966 0.354 0.3496 0.331 0.2927 0.2667 0.1407 

1967 0.3497 0.3458 0.3284 0.2915 0.2659 0.1371 

1968 0.3473 0.343 0.3253 0.2886 0.2627 0.136 

1969 0.3495 0.3453 0.3273 0.2901 0.2649 0.1382 

1970 0.3496 0.3455 0.3275 0.2896 0.2636 0.1368 

1971 0.3487 0.3445 0.3274 0.2917 0.2663 0.1383 

1972 0.3494 0.3451 0.3271 0.2893 0.2633 0.137 

1973 0.3493 0.345 0.3267 0.2881 0.2619 0.1363 

1974 0.3486 0.3444 0.3266 0.2892 0.2633 0.1362 

1975 0.3487 0.3447 0.3272 0.2901 0.2647 0.1383 

1976 0.3506 0.3465 0.3286 0.2913 0.2661 0.1401 

1977 0.3507 0.3463 0.3321 0.3014 0.2752 0.1427 

1978 1.162 1.148 1.087 0.9603 0.8732 0.4064 

1979 0.4493 0.444 0.4214 0.3736 0.3404 0.2125 

1980 0.3604 0.356 0.3379 0.3005 0.2744 0.146 

1981 0.3495 0.3452 0.327 0.2885 0.2612 0.1342 

1982 0.3466 0.3425 0.3248 0.2881 0.2631 0.1361 

1983 1.341 1.324 1.252 1.104 1.004 0.4654 

1984 0.4723 0.4669 0.4425 0.391 0.3556 0.2271 

1985 0.3615 0.3569 0.3381 0.2987 0.2707 0.1439 

1986 0.3475 0.3432 0.3249 0.2867 0.2603 0.1337 

1987 0.3459 0.3415 0.3249 0.3082 0.2837 0.1465 

1988 0.3526 0.3483 0.3305 0.2935 0.2674 0.1388 

1989 0.4316 0.426 0.4033 0.3627 0.3366 0.1719 

1990 0.3632 0.3586 0.34 0.3015 0.2745 0.147 

Sorted results 

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

0.032258064516129 1.496 1.478 1.402 1.244 1.136 0.5299 

0.0645161290322581 1.341 1.324 1.252 1.104 1.004 0.4654 

0.0967741935483871 1.162 1.148 1.087 0.9603 0.8732 0.4064 

0.129032258064516 0.5041 0.4985 0.4748 0.4248 0.3893 0.2593 

0.161290322580645 0.4723 0.4669 0.4425 0.391 0.3556 0.2271 

0.193548387096774 0.4493 0.444 0.4214 0.3736 0.3404 0.2125 

0.225806451612903 0.4316 0.426 0.4033 0.3627 0.3366 0.1719 

0.258064516129032 0.3731 0.3687 0.35 0.3113 0.2849 0.158 

0.290322580645161 0.3632 0.3586 0.34 0.3082 0.2837 0.147 

0.32258064516129 0.3615 0.3569 0.3381 0.3015 0.2752 0.1465 

0.354838709677419 0.3604 0.356 0.3379 0.3014 0.2745 0.146 

0.387096774193548 0.354 0.3496 0.3321 0.3005 0.2744 0.1439 

0.419354838709677 0.3526 0.3483 0.331 0.2987 0.2707 0.1427 

0.451612903225806 0.3507 0.3465 0.3305 0.2935 0.2674 0.1407 

0.483870967741936 0.3506 0.3463 0.3286 0.2927 0.2667 0.1401 

0.516129032258065 0.3497 0.3458 0.3284 0.2917 0.2663 0.1388 

0.548387096774194 0.3496 0.3455 0.3275 0.2915 0.2661 0.1383 

0.580645161290323 0.3495 0.3453 0.3274 0.2913 0.2659 0.1383 

0.612903225806452 0.3495 0.3452 0.3273 0.2901 0.2649 0.1382 

0.645161290322581 0.3494 0.3451 0.3272 0.2901 0.2647 0.1371 

0.67741935483871 0.3493 0.345 0.3271 0.2896 0.2636 0.137 

0.709677419354839 0.3487 0.3447 0.327 0.2893 0.2633 0.1368 

0.741935483870968 0.3487 0.3445 0.3267 0.2892 0.2633 0.1363 
12

0.774193548387097 0.3486 0.3444 0.3266 0.2886 0.2631 0.1362 

0.806451612903226 0.3475 0.3432 0.3253 0.2885 0.2627 0.1361 

0.838709677419355 0.3473 0.343 0.3249 0.2881 0.2619 0.136 

0.870967741935484 0.3466 0.3425 0.3249 0.2881 0.2612 0.1342 

0.903225806451613 0.3459 0.3415 0.3248 0.2867 0.2605 0.1337 

0.935483870967742 0.3424 0.3381 0.3208 0.2855 0.2603 0.1332 

0.967741935483871 0.3029 0.2991 0.2837 0.2518 0.229 0.1019 

0.1 1.09621 1.08305 1.02578 0.90675 0.82481 0.39169 

 Average of yearly averages: 0.18165 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 1Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 25-4 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant. Aerial 

stored as 2Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.3689 0.3644 0.3461 0.3127 0.296 0.1423 

1962 0.3574 0.3529 0.3351 0.2993 0.275 0.1452 

1963 1.548 1.53 1.464 1.342 1.236 0.5974 

1964 0.5616 0.5554 0.53 0.4772 0.44 0.2768 

1965 0.4388 0.4337 0.4165 0.3825 0.3532 0.1915 

1966 0.3665 0.3619 0.3434 0.3057 0.2798 0.1497 

1967 0.7661 0.7593 0.7398 0.6706 0.6162 0.3013 

1968 1.067 1.054 1.002 0.8938 0.8186 0.4118 

1969 1.613 1.593 1.515 1.35 1.237 0.6223 

1970 0.5203 0.5146 0.4915 0.4419 0.4061 0.2567 

1971 1.551 1.533 1.457 1.3 1.189 0.5766 

1972 0.5245 0.5186 0.4945 0.4438 0.4077 0.2597 

1973 0.3755 0.371 0.353 0.315 0.2882 0.1562 

1974 0.5298 0.5234 0.4977 0.4443 0.4068 0.2035 

1975 0.3715 0.3673 0.3503 0.3143 0.2886 0.1568 

1976 0.3542 0.3501 0.3342 0.2992 0.2746 0.1451 
13

1977 0.3519 0.3475 0.3296 0.2986 0.2764 0.1443 

1978 1.425 1.408 1.339 1.194 1.092 0.5213 

1979 0.488 0.4824 0.4595 0.4115 0.3774 0.232 

1980 0.3657 0.3613 0.3435 0.3071 0.2822 0.1503 

1981 0.7165 0.7076 0.6713 0.5937 0.5395 0.27 

1982 0.5703 0.5637 0.5369 0.4791 0.4448 0.242 

1983 0.3828 0.3784 0.3613 0.349 0.3268 0.18 

1984 0.3591 0.3548 0.3374 0.3003 0.2743 0.1418 

1985 0.3465 0.342 0.3241 0.288 0.263 0.1335 

1986 0.345 0.3407 0.3236 0.2882 0.2633 0.1339 

1987 0.3457 0.3413 0.3235 0.2966 0.2787 0.1467 

1988 1.769 1.751 1.672 1.495 1.375 0.6488 

1989 0.5481 0.5415 0.515 0.4975 0.4756 0.3077 

1990 0.9382 0.9263 0.8781 0.7785 0.709 0.3652 

Sorted results 

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

0.032258064516129 1.769 1.751 1.672 1.495 1.375 0.6488 

0.0645161290322581 1.613 1.593 1.515 1.35 1.237 0.6223 

0.0967741935483871 1.551 1.533 1.464 1.342 1.236 0.5974 

0.129032258064516 1.548 1.53 1.457 1.3 1.189 0.5766 

0.161290322580645 1.425 1.408 1.339 1.194 1.092 0.5213 

0.193548387096774 1.067 1.054 1.002 0.8938 0.8186 0.4118 

0.225806451612903 0.9382 0.9263 0.8781 0.7785 0.709 0.3652 

0.258064516129032 0.7661 0.7593 0.7398 0.6706 0.6162 0.3077 

0.290322580645161 0.7165 0.7076 0.6713 0.5937 0.5395 0.3013 

0.32258064516129 0.5703 0.5637 0.5369 0.4975 0.4756 0.2768 

0.354838709677419 0.5616 0.5554 0.53 0.4791 0.4448 0.27 

0.387096774193548 0.5481 0.5415 0.515 0.4772 0.44 0.2597 

0.419354838709677 0.5298 0.5234 0.4977 0.4443 0.4077 0.2567 

0.451612903225806 0.5245 0.5186 0.4945 0.4438 0.4068 0.242 

0.483870967741936 0.5203 0.5146 0.4915 0.4419 0.4061 0.232 

0.516129032258065 0.488 0.4824 0.4595 0.4115 0.3774 0.2035 

0.548387096774194 0.4388 0.4337 0.4165 0.3825 0.3532 0.1915 

0.580645161290323 0.3828 0.3784 0.3613 0.349 0.3268 0.18 

0.612903225806452 0.3755 0.371 0.353 0.315 0.296 0.1568 

0.645161290322581 0.3715 0.3673 0.3503 0.3143 0.2886 0.1562 

0.67741935483871 0.3689 0.3644 0.3461 0.3127 0.2882 0.1503 

0.709677419354839 0.3665 0.3619 0.3435 0.3071 0.2822 0.1497 

0.741935483870968 0.3657 0.3613 0.3434 0.3057 0.2798 0.1467 

0.774193548387097 0.3591 0.3548 0.3374 0.3003 0.2787 0.1452 

0.806451612903226 0.3574 0.3529 0.3351 0.2993 0.2764 0.1451 

0.838709677419355 0.3542 0.3501 0.3342 0.2992 0.275 0.1443 

0.870967741935484 0.3519 0.3475 0.3296 0.2986 0.2746 0.1423 

0.903225806451613 0.3465 0.342 0.3241 0.2966 0.2743 0.1418 

0.935483870967742 0.3457 0.3413 0.3236 0.2882 0.2633 0.1339 

0.967741935483871 0.345 0.3407 0.3235 0.288 0.263 0.1335 

0.1 1.5507 1.5327 1.4633 1.3378 1.2313 0.59532 

 Average of yearly averages: 0.27368 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 2Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 
14

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 1-4 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant, Ground, 1 application 

stored as 3Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.4079 0.4029 0.3827 0.3406 0.3177 0.1549 

1962 0.3518 0.3475 0.33 0.2949 0.271 0.1452 

1963 2.117 2.092 2.002 1.833 1.689 0.8084 

1964 0.6487 0.6416 0.6127 0.5525 0.5099 0.3357 

1965 0.4776 0.472 0.4512 0.4138 0.3828 0.21 

1966 0.361 0.3565 0.3384 0.3013 0.2759 0.1498 

1967 0.9601 0.9492 0.9254 0.8405 0.7726 0.373 

1968 1.395 1.378 1.31 1.169 1.07 0.5366 

1969 2.203 2.176 2.07 1.844 1.69 0.8457 

1970 0.5885 0.5822 0.5565 0.5012 0.461 0.3073 

1971 2.125 2.099 1.996 1.779 1.627 0.7784 

1972 0.5947 0.5881 0.5613 0.5046 0.464 0.312 

1973 0.3751 0.3707 0.3528 0.315 0.2883 0.1597 

1974 0.6029 0.5956 0.5663 0.5055 0.4628 0.2294 

1975 0.3696 0.3655 0.3487 0.3131 0.2875 0.1592 

1976 0.343 0.339 0.324 0.2902 0.2664 0.1413 

1977 0.3393 0.335 0.3178 0.2902 0.27 0.1416 

1978 1.929 1.906 1.812 1.616 1.477 0.6984 

1979 0.5419 0.5358 0.5108 0.4582 0.4207 0.2725 

1980 0.3623 0.358 0.3404 0.3045 0.2799 0.1518 

1981 0.8971 0.886 0.8404 0.7428 0.6743 0.3293 

1982 0.6732 0.6653 0.6337 0.5656 0.5192 0.2863 

1983 0.4074 0.4025 0.3817 0.3646 0.3444 0.1945 

1984 0.3522 0.348 0.331 0.2947 0.2692 0.141 

1985 0.3345 0.3303 0.313 0.2782 0.254 0.1292 

1986 0.3324 0.3283 0.3118 0.2777 0.2537 0.1291 

1987 0.333 0.3287 0.3115 0.2905 0.2767 0.1474 

1988 2.448 2.424 2.315 2.066 1.901 0.8867 

1989 0.6635 0.6555 0.6228 0.5859 0.5661 0.3843 

1990 1.228 1.213 1.149 1.019 0.9275 0.4689 

Sorted results 

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

0.032258064516129 2.448 2.424 2.315 2.066 1.901 0.8867 

0.0645161290322581 2.203 2.176 2.07 1.844 1.69 0.8457 

0.0967741935483871 2.125 2.099 2.002 1.833 1.689 0.8084 

0.129032258064516 2.117 2.092 1.996 1.779 1.627 0.7784 

0.161290322580645 1.929 1.906 1.812 1.616 1.477 0.6984 

0.193548387096774 1.395 1.378 1.31 1.169 1.07 0.5366 

0.225806451612903 1.228 1.213 1.149 1.019 0.9275 0.4689 

0.258064516129032 0.9601 0.9492 0.9254 0.8405 0.7726 0.3843 

0.290322580645161 0.8971 0.886 0.8404 0.7428 0.6743 0.373 

0.32258064516129 0.6732 0.6653 0.6337 0.5859 0.5661 0.3357 

0.354838709677419 0.6635 0.6555 0.6228 0.5656 0.5192 0.3293 

0.387096774193548 0.6487 0.6416 0.6127 0.5525 0.5099 0.312 

0.419354838709677 0.6029 0.5956 0.5663 0.5055 0.464 0.3073 
15

0.451612903225806 0.5947 0.5881 0.5613 0.5046 0.4628 0.2863 

0.483870967741936 0.5885 0.5822 0.5565 0.5012 0.461 0.2725 

0.516129032258065 0.5419 0.5358 0.5108 0.4582 0.4207 0.2294 

0.548387096774194 0.4776 0.472 0.4512 0.4138 0.3828 0.21 

0.580645161290323 0.4079 0.4029 0.3827 0.3646 0.3444 0.1945 

0.612903225806452 0.4074 0.4025 0.3817 0.3406 0.3177 0.1597 

0.645161290322581 0.3751 0.3707 0.3528 0.315 0.2883 0.1592 

0.67741935483871 0.3696 0.3655 0.3487 0.3131 0.2875 0.1549 

0.709677419354839 0.3623 0.358 0.3404 0.3045 0.2799 0.1518 

0.741935483870968 0.361 0.3565 0.3384 0.3013 0.2767 0.1498 

0.774193548387097 0.3522 0.348 0.331 0.2949 0.2759 0.1474 

0.806451612903226 0.3518 0.3475 0.33 0.2947 0.271 0.1452 

0.838709677419355 0.343 0.339 0.324 0.2905 0.27 0.1416 

0.870967741935484 0.3393 0.335 0.3178 0.2902 0.2692 0.1413 

0.903225806451613 0.3345 0.3303 0.313 0.2902 0.2664 0.141 

0.935483870967742 0.333 0.3287 0.3118 0.2782 0.254 0.1292 

0.967741935483871 0.3324 0.3283 0.3115 0.2777 0.2537 0.1291 

0.1 2.1242 2.0983 2.0014 1.8276 1.6828 0.8054 

 Average of yearly averages: 0.333586666666667 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 3Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 1-4 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant, Ground, 2 applications 

stored as 4Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.8403 0.8299 0.7879 0.7008 0.6441 0.3071 

1962 0.6731 0.6649 0.6317 0.5646 0.5172 0.2895 

1963 2.867 2.834 2.74 2.486 2.309 1.138 

1964 1.016 1.005 0.9589 0.8617 0.8123 0.5286 

1965 0.8123 0.8027 0.7638 0.6814 0.6288 0.3541 

1966 0.6703 0.662 0.6283 0.5578 0.5103 0.2844 
16

1967 3.741 3.699 3.536 3.144 2.871 1.358 

1968 1.932 1.91 1.818 1.695 1.573 0.9032 

1969 2.459 2.43 2.312 2.137 1.971 1.015 

1970 0.8898 0.8801 0.84 0.7497 0.7006 0.4454 

1971 4.446 4.393 4.175 3.721 3.402 1.601 

1972 1.149 1.137 1.085 0.9826 0.9212 0.6391 

1973 0.7212 0.7128 0.6783 0.6023 0.5538 0.3207 

1974 0.8957 0.8851 0.8421 0.7488 0.7003 0.3658 

1975 0.6783 0.6707 0.6397 0.5704 0.5222 0.2941 

1976 0.6556 0.648 0.6172 0.5495 0.5031 0.2772 

1977 0.6486 0.6405 0.6079 0.5642 0.5199 0.2819 

1978 2.164 2.138 2.086 1.928 1.782 0.8645 

1979 0.8484 0.8385 0.7985 0.7113 0.6626 0.4123 

1980 0.6683 0.6603 0.6279 0.5603 0.5134 0.2838 

1981 1.823 1.8 1.707 1.508 1.369 0.6566 

1982 1.062 1.05 1 0.8944 0.8266 0.4732 

1983 0.8184 0.8084 0.7661 0.7048 0.6544 0.3658 

1984 0.6715 0.6635 0.6309 0.558 0.5098 0.2781 

1985 0.6395 0.6314 0.5986 0.5311 0.483 0.2573 

1986 0.6374 0.6297 0.5982 0.5303 0.4829 0.2571 

1987 0.639 0.6306 0.5969 0.5796 0.5432 0.2952 

1988 5.73 5.661 5.451 4.85 4.423 2.041 

1989 1.447 1.43 1.359 1.264 1.2 0.8478 

1990 2.507 2.475 2.346 2.079 1.893 0.9516 

Sorted results 

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

0.032258064516129 5.73 5.661 5.451 4.85 4.423 2.041 

0.0645161290322581 4.446 4.393 4.175 3.721 3.402 1.601 

0.0967741935483871 3.741 3.699 3.536 3.144 2.871 1.358 

0.129032258064516 2.867 2.834 2.74 2.486 2.309 1.138 

0.161290322580645 2.507 2.475 2.346 2.137 1.971 1.015 

0.193548387096774 2.459 2.43 2.312 2.079 1.893 0.9516 

0.225806451612903 2.164 2.138 2.086 1.928 1.782 0.9032 

0.258064516129032 1.932 1.91 1.818 1.695 1.573 0.8645 

0.290322580645161 1.823 1.8 1.707 1.508 1.369 0.8478 

0.32258064516129 1.447 1.43 1.359 1.264 1.2 0.6566 

0.354838709677419 1.149 1.137 1.085 0.9826 0.9212 0.6391 

0.387096774193548 1.062 1.05 1 0.8944 0.8266 0.5286 

0.419354838709677 1.016 1.005 0.9589 0.8617 0.8123 0.4732 

0.451612903225806 0.8957 0.8851 0.8421 0.7497 0.7006 0.4454 

0.483870967741936 0.8898 0.8801 0.84 0.7488 0.7003 0.4123 

0.516129032258065 0.8484 0.8385 0.7985 0.7113 0.6626 0.3658 

0.548387096774194 0.8403 0.8299 0.7879 0.7048 0.6544 0.3658 

0.580645161290323 0.8184 0.8084 0.7661 0.7008 0.6441 0.3541 

0.612903225806452 0.8123 0.8027 0.7638 0.6814 0.6288 0.3207 

0.645161290322581 0.7212 0.7128 0.6783 0.6023 0.5538 0.3071 

0.67741935483871 0.6783 0.6707 0.6397 0.5796 0.5432 0.2952 

0.709677419354839 0.6731 0.6649 0.6317 0.5704 0.5222 0.2941 

0.741935483870968 0.6715 0.6635 0.6309 0.5646 0.5199 0.2895 

0.774193548387097 0.6703 0.662 0.6283 0.5642 0.5172 0.2844 

0.806451612903226 0.6683 0.6603 0.6279 0.5603 0.5134 0.2838 

0.838709677419355 0.6556 0.648 0.6172 0.558 0.5103 0.2819 

0.870967741935484 0.6486 0.6405 0.6079 0.5578 0.5098 0.2781 

0.903225806451613 0.6395 0.6314 0.5986 0.5495 0.5031 0.2772 

0.935483870967742 0.639 0.6306 0.5982 0.5311 0.483 0.2573 

0.967741935483871 0.6374 0.6297 0.5969 0.5303 0.4829 0.2571 

0.1 3.6536 3.6125 3.4564 3.0782 2.8148 1.336 

 Average of yearly averages: 0.612913333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 4Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 
17

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 1-4 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 0.1249 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) 

Post Plant, Ground, 1 application 

stored as 5Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.3014 0.2979 0.2896 0.2637 0.2404 0.12 

1962 0.3923 0.3875 0.376 0.3345 0.3045 0.1909 

1963 0.3635 0.3591 0.3497 0.3138 0.2868 0.1764 

1964 0.3742 0.3695 0.3554 0.3193 0.2914 0.1936 

1965 0.3954 0.3904 0.3755 0.3348 0.3054 0.1936 

1966 0.3611 0.3563 0.3457 0.3101 0.283 0.1624 

1967 0.3533 0.3487 0.3362 0.3053 0.2782 0.1579 

1968 0.374 0.37 0.3548 0.3334 0.3035 0.2064 

1969 0.4373 0.4317 0.4193 0.3771 0.3445 0.2289 

1970 0.3664 0.3616 0.3515 0.3148 0.2864 0.1775 

1971 0.4401 0.4348 0.4152 0.3841 0.3522 0.2165 

1972 0.3566 0.352 0.3363 0.3218 0.2968 0.1729 

1973 0.3673 0.3623 0.3483 0.3074 0.2792 0.1795 

1974 0.3765 0.3725 0.3645 0.3246 0.2952 0.1997 

1975 0.4138 0.4085 0.3916 0.3478 0.3171 0.2211 

1976 0.3983 0.3932 0.38 0.3454 0.317 0.2184 

1977 0.3865 0.3818 0.3726 0.3319 0.3017 0.1854 

1978 0.3868 0.3818 0.3659 0.3234 0.2992 0.2261 

1979 0.4017 0.3964 0.3824 0.3384 0.3105 0.2013 

1980 0.3675 0.3629 0.3537 0.3153 0.2865 0.1634 

1981 0.3499 0.3453 0.3306 0.2897 0.2615 0.146 

1982 0.3482 0.3437 0.3291 0.2946 0.2718 0.1797 

1983 0.3931 0.3888 0.3798 0.3382 0.3082 0.2002 

1984 0.3689 0.3645 0.3573 0.3239 0.294 0.1714 

1985 0.3533 0.3486 0.3408 0.305 0.2762 0.1662 

1986 0.3671 0.3623 0.3546 0.3143 0.2851 0.172 

1987 1.958 1.931 1.826 1.599 1.452 0.6774 

1988 0.5428 0.5368 0.5247 0.4694 0.4267 0.3217 

1989 0.3906 0.386 0.3717 0.329 0.2986 0.2033 

1990 0.5824 0.5752 0.5443 0.4763 0.4381 0.2414 

Sorted results 

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

0.032258064516129 1.958 1.931 1.826 1.599 1.452 0.6774 

0.0645161290322581 0.5824 0.5752 0.5443 0.4763 0.4381 0.3217 
18

0.0967741935483871 0.5428 0.5368 0.5247 0.4694 0.4267 0.2414 

0.129032258064516 0.4401 0.4348 0.4193 0.3841 0.3522 0.2289 

0.161290322580645 0.4373 0.4317 0.4152 0.3771 0.3445 0.2261 

0.193548387096774 0.4138 0.4085 0.3916 0.3478 0.3171 0.2211 

0.225806451612903 0.4017 0.3964 0.3824 0.3454 0.317 0.2184 

0.258064516129032 0.3983 0.3932 0.38 0.3384 0.3105 0.2165 

0.290322580645161 0.3954 0.3904 0.3798 0.3382 0.3082 0.2064 

0.32258064516129 0.3931 0.3888 0.376 0.3348 0.3054 0.2033 

0.354838709677419 0.3923 0.3875 0.3755 0.3345 0.3045 0.2013 

0.387096774193548 0.3906 0.386 0.3726 0.3334 0.3035 0.2002 

0.419354838709677 0.3868 0.3818 0.3717 0.3319 0.3017 0.1997 

0.451612903225806 0.3865 0.3818 0.3659 0.329 0.2992 0.1936 

0.483870967741936 0.3765 0.3725 0.3645 0.3246 0.2986 0.1936 

0.516129032258065 0.3742 0.37 0.3573 0.3239 0.2968 0.1909 

0.548387096774194 0.374 0.3695 0.3554 0.3234 0.2952 0.1854 

0.580645161290323 0.3689 0.3645 0.3548 0.3218 0.294 0.1797 

0.612903225806452 0.3675 0.3629 0.3546 0.3193 0.2914 0.1795 

0.645161290322581 0.3673 0.3623 0.3537 0.3153 0.2868 0.1775 

0.67741935483871 0.3671 0.3623 0.3515 0.3148 0.2865 0.1764 

0.709677419354839 0.3664 0.3616 0.3497 0.3143 0.2864 0.1729 

0.741935483870968 0.3635 0.3591 0.3483 0.3138 0.2851 0.172 

0.774193548387097 0.3611 0.3563 0.3457 0.3101 0.283 0.1714 

0.806451612903226 0.3566 0.352 0.3408 0.3074 0.2792 0.1662 

0.838709677419355 0.3533 0.3487 0.3363 0.3053 0.2782 0.1634 

0.870967741935484 0.3533 0.3486 0.3362 0.305 0.2762 0.1624 

0.903225806451613 0.3499 0.3453 0.3306 0.2946 0.2718 0.1579 

0.935483870967742 0.3482 0.3437 0.3291 0.2897 0.2615 0.146 

0.967741935483871 0.3014 0.2979 0.2896 0.2637 0.2404 0.12 

0.1 0.53253 0.5266 0.51416 0.46087 0.41925 0.24015 

 Average of yearly averages: 0.20904 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 5Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 15-5 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Post Plant, Ground, 2 applications 

stored as 6Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 
19

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 1.025 1.014 0.9705 0.8551 0.7799 0.3948 

1962 1.278 1.268 1.214 1.077 0.9797 0.6381 

1963 1.099 1.088 1.049 0.9384 0.8576 0.5522 

1964 1.017 1.009 0.9793 0.8744 0.7972 0.5639 

1965 1.176 1.162 1.12 1.001 0.9146 0.5908 

1966 1.33 1.316 1.275 1.129 1.027 0.5814 

1967 1.101 1.088 1.051 0.9391 0.8539 0.5181 

1968 1.157 1.144 1.098 1.035 0.9468 0.6473 

1969 1.252 1.244 1.202 1.076 0.9824 0.6885 

1970 1.059 1.05 1.014 0.9006 0.8194 0.5295 

1971 1.212 1.197 1.157 1.035 0.9444 0.6153 

1972 1.199 1.186 1.134 1.023 0.9348 0.5442 

1973 1.039 1.026 0.9848 0.8743 0.796 0.5473 

1974 1.059 1.047 1.005 0.8904 0.811 0.5809 

1975 1.213 1.205 1.151 1.023 0.9329 0.6665 

1976 1.102 1.094 1.068 0.9648 0.8863 0.6421 

1977 1.202 1.189 1.141 1.01 0.9165 0.5739 

1978 1.137 1.122 1.096 0.9871 0.919 0.6911 

1979 1.119 1.11 1.062 0.9451 0.8709 0.5939 

1980 1.011 1.003 0.9639 0.8563 0.7782 0.4684 

1981 1.101 1.093 1.039 0.9096 0.8215 0.4632 

1982 0.9455 0.9374 0.9027 0.8183 0.7521 0.5284 

1983 1.141 1.127 1.084 0.9649 0.8794 0.5922 

1984 1.125 1.114 1.081 0.9543 0.8622 0.519 

1985 1.072 1.061 1.019 0.8935 0.8079 0.5045 

1986 1.1 1.091 1.042 0.9178 0.8313 0.5211 

1987 2.488 2.47 2.366 2.154 1.994 1.038 

1988 1.46 1.447 1.397 1.234 1.119 0.7065 

1989 1.059 1.049 1.005 0.8896 0.8089 0.5781 

1990 1.193 1.184 1.134 1.011 0.9188 0.5545 

Sorted results 

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

0.032258064516129 2.488 2.47 2.366 2.154 1.994 1.038 

0.0645161290322581 1.46 1.447 1.397 1.234 1.119 0.7065 

0.0967741935483871 1.33 1.316 1.275 1.129 1.027 0.6911 

0.129032258064516 1.278 1.268 1.214 1.077 0.9824 0.6885 

0.161290322580645 1.252 1.244 1.202 1.076 0.9797 0.6665 

0.193548387096774 1.213 1.205 1.157 1.035 0.9468 0.6473 

0.225806451612903 1.212 1.197 1.151 1.035 0.9444 0.6421 

0.258064516129032 1.202 1.189 1.141 1.023 0.9348 0.6381 

0.290322580645161 1.199 1.186 1.134 1.023 0.9329 0.6153 

0.32258064516129 1.193 1.184 1.134 1.011 0.919 0.5939 

0.354838709677419 1.176 1.162 1.12 1.01 0.9188 0.5922 

0.387096774193548 1.157 1.144 1.098 1.001 0.9165 0.5908 

0.419354838709677 1.141 1.127 1.096 0.9871 0.9146 0.5814 

0.451612903225806 1.137 1.122 1.084 0.9649 0.8863 0.5809 

0.483870967741936 1.125 1.114 1.081 0.9648 0.8794 0.5781 

0.516129032258065 1.119 1.11 1.068 0.9543 0.8709 0.5739 

0.548387096774194 1.102 1.094 1.062 0.9451 0.8622 0.5639 

0.580645161290323 1.101 1.093 1.051 0.9391 0.8576 0.5545 

0.612903225806452 1.101 1.091 1.049 0.9384 0.8539 0.5522 

0.645161290322581 1.1 1.088 1.042 0.9178 0.8313 0.5473 

0.67741935483871 1.099 1.088 1.039 0.9096 0.8215 0.5442 

0.709677419354839 1.072 1.061 1.019 0.9006 0.8194 0.5295 

0.741935483870968 1.059 1.05 1.014 0.8935 0.811 0.5284 

0.774193548387097 1.059 1.049 1.005 0.8904 0.8089 0.5211 

0.806451612903226 1.059 1.047 1.005 0.8896 0.8079 0.519 

0.838709677419355 1.039 1.026 0.9848 0.8744 0.7972 0.5181 

0.870967741935484 1.025 1.014 0.9793 0.8743 0.796 0.5045 

0.903225806451613 1.017 1.009 0.9705 0.8563 0.7799 0.4684 

0.935483870967742 1.011 1.003 0.9639 0.8551 0.7782 0.4632 

0.967741935483871 0.9455 0.9374 0.9027 0.8183 0.7521 0.3948 

0.1 1.3248 1.3112 1.2689 1.1238 1.02254 0.69084 

 Average of yearly averages: 0.58779 
20

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 6Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 15-5 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 0.1249 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) 

Fall, Ground 

stored as 7Cacot.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 2.293 2.267 2.209 1.56 1.095 0.2701 

1962 1.937 1.917 1.838 1.675 1.562 0.9009 

1963 1.026 1.015 0.9813 0.902 0.7269 0.445 

1964 2.086 2.059 2.01 1.849 1.395 0.676 

1965 1.557 1.541 1.478 1.347 1.257 0.7669 

1966 0.5793 0.5739 0.5518 0.5055 0.4728 0.3383 

1967 0.9769 0.9656 0.9359 0.733 0.5748 0.3347 

1968 2.288 2.262 2.188 1.987 1.45 0.674 

1969 1.736 1.719 1.648 1.503 1.403 0.8396 

1970 1.918 1.896 1.817 1.214 0.9084 0.4917 

1971 1.62 1.604 1.536 1.397 1.302 0.7669 

1972 1.903 1.882 1.815 1.555 1.141 0.4645 

1973 1.479 1.464 1.404 1.278 1.192 0.7378 

1974 2.194 2.166 2.063 1.981 1.497 0.6132 

1975 1.816 1.798 1.729 1.578 1.473 1 

1976 1.287 1.275 1.228 1.121 1.096 0.7462 

1977 1.381 1.366 1.089 0.7162 0.6308 0.4553 

1978 1.279 1.265 1.209 1.095 1.017 0.6385 

1979 0.8851 0.8753 0.8358 0.7563 0.6222 0.4189 

1980 0.7012 0.6941 0.6669 0.6076 0.5666 0.3601 

1981 0.6437 0.636 0.6066 0.5513 0.4569 0.2817 

1982 2.029 2.006 1.929 1.765 1.328 0.5133 

1983 1.631 1.615 1.549 1.41 1.313 0.836 

1984 0.8563 0.8478 0.8133 0.7417 0.6918 0.4769 
21

1985 1.859 1.84 1.775 1.602 1.279 0.553 

1986 1.621 1.603 1.368 1.242 1.155 0.72 

1987 1.552 1.537 1.482 1.348 1.254 0.7234 

1988 0.8932 0.883 0.8419 0.7056 0.5523 0.3041 

1989 0.8199 0.8109 0.7759 0.7195 0.6022 0.4299 

1990 0.9042 0.8955 0.8596 0.784 0.7388 0.4579 

Sorted results 

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

0.032258064516129 2.293 2.267 2.209 1.987 1.562 1 

0.0645161290322581 2.288 2.262 2.188 1.981 1.497 0.9009 

0.0967741935483871 2.194 2.166 2.063 1.849 1.473 0.8396 

0.129032258064516 2.086 2.059 2.01 1.765 1.45 0.836 

0.161290322580645 2.029 2.006 1.929 1.675 1.403 0.7669 

0.193548387096774 1.937 1.917 1.838 1.602 1.395 0.7669 

0.225806451612903 1.918 1.896 1.817 1.578 1.328 0.7462 

0.258064516129032 1.903 1.882 1.815 1.56 1.313 0.7378 

0.290322580645161 1.859 1.84 1.775 1.555 1.302 0.7234 

0.32258064516129 1.816 1.798 1.729 1.503 1.279 0.72 

0.354838709677419 1.736 1.719 1.648 1.41 1.257 0.676 

0.387096774193548 1.631 1.615 1.549 1.397 1.254 0.674 

0.419354838709677 1.621 1.604 1.536 1.348 1.192 0.6385 

0.451612903225806 1.62 1.603 1.482 1.347 1.155 0.6132 

0.483870967741936 1.557 1.541 1.478 1.278 1.141 0.553 

0.516129032258065 1.552 1.537 1.404 1.242 1.096 0.5133 

0.548387096774194 1.479 1.464 1.368 1.214 1.095 0.4917 

0.580645161290323 1.381 1.366 1.228 1.121 1.017 0.4769 

0.612903225806452 1.287 1.275 1.209 1.095 0.9084 0.4645 

0.645161290322581 1.279 1.265 1.089 0.902 0.7388 0.4579 

0.67741935483871 1.026 1.015 0.9813 0.784 0.7269 0.4553 

0.709677419354839 0.9769 0.9656 0.9359 0.7563 0.6918 0.445 

0.741935483870968 0.9042 0.8955 0.8596 0.7417 0.6308 0.4299 

0.774193548387097 0.8932 0.883 0.8419 0.733 0.6222 0.4189 

0.806451612903226 0.8851 0.8753 0.8358 0.7195 0.6022 0.3601 

0.838709677419355 0.8563 0.8478 0.8133 0.7162 0.5748 0.3383 

0.870967741935484 0.8199 0.8109 0.7759 0.7056 0.5666 0.3347 

0.903225806451613 0.7012 0.6941 0.6669 0.6076 0.5523 0.3041 

0.935483870967742 0.6437 0.636 0.6066 0.5513 0.4728 0.2817 

0.967741935483871 0.5793 0.5739 0.5518 0.5055 0.4569 0.2701 

0.1 2.1832 2.1553 2.0577 1.8406 1.4707 0.83924 

 Average of yearly averages: 0.574493333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 7Cacot 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 15-10 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 
22

 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) 

Fall, Aerial 

stored as CAcot8.out 

Chemical: pyroxasulfone 

PRZM environment: CAcotton_WirrigSTD.txt modified Tueday, 29 May 2007 at 12:42:12 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 1.639 1.62 1.577 1.139 0.8164 0.2013 

1962 1.382 1.369 1.312 1.196 1.115 0.6598 

1963 0.7946 0.786 0.7612 0.7048 0.5802 0.3549 

1964 1.526 1.506 1.468 1.349 1.033 0.5124 

1965 1.135 1.124 1.078 0.9826 0.9169 0.5736 

1966 0.4726 0.4682 0.4551 0.4278 0.3855 0.2828 

1967 0.7608 0.752 0.7275 0.5893 0.4763 0.2802 

1968 1.66 1.641 1.586 1.441 1.07 0.5102 

1969 1.258 1.245 1.194 1.089 1.017 0.6234 

1970 1.395 1.379 1.321 0.9162 0.7031 0.387 

1971 1.179 1.166 1.117 1.017 0.9479 0.574 

1972 1.392 1.377 1.329 1.148 0.8613 0.3686 

1973 1.083 1.073 1.028 0.9365 0.8737 0.554 

1974 1.6 1.58 1.505 1.439 1.102 0.4692 

1975 1.311 1.299 1.249 1.14 1.064 0.7327 

1976 0.941 0.9321 0.8979 0.8243 0.8086 0.5605 

1977 1.022 1.01 0.8217 0.5778 0.4929 0.3622 

1978 0.9458 0.9356 0.8943 0.8101 0.7527 0.4854 

1979 0.6989 0.6912 0.6601 0.6049 0.5078 0.3366 

1980 0.5539 0.5483 0.5267 0.4798 0.4475 0.2967 

1981 0.5473 0.5408 0.5158 0.4681 0.3958 0.2434 

1982 1.476 1.459 1.403 1.291 0.9879 0.4014 

1983 1.186 1.174 1.126 1.025 0.9552 0.6202 

1984 0.6588 0.6523 0.6257 0.5707 0.5323 0.3753 

1985 1.363 1.349 1.301 1.179 0.9538 0.4273 

1986 1.182 1.169 1.003 0.9101 0.8465 0.5403 

1987 1.13 1.119 1.08 0.9818 0.9136 0.5428 

1988 0.7066 0.6986 0.6662 0.5701 0.4604 0.2587 

1989 0.651 0.6438 0.6161 0.5829 0.4947 0.3442 

1990 0.6874 0.6808 0.6539 0.5965 0.5652 0.3634 

Sorted results 

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

0.032258064516129 1.66 1.641 1.586 1.441 1.115 0.7327 

0.0645161290322581 1.639 1.62 1.577 1.439 1.102 0.6598 

0.0967741935483871 1.6 1.58 1.505 1.349 1.07 0.6234 

0.129032258064516 1.526 1.506 1.468 1.291 1.064 0.6202 

0.161290322580645 1.476 1.459 1.403 1.196 1.033 0.574 

0.193548387096774 1.395 1.379 1.329 1.179 1.017 0.5736 

0.225806451612903 1.392 1.377 1.321 1.148 0.9879 0.5605 

0.258064516129032 1.382 1.369 1.312 1.14 0.9552 0.554 

0.290322580645161 1.363 1.349 1.301 1.139 0.9538 0.5428 

0.32258064516129 1.311 1.299 1.249 1.089 0.9479 0.5403 

0.354838709677419 1.258 1.245 1.194 1.025 0.9169 0.5124 

0.387096774193548 1.186 1.174 1.126 1.017 0.9136 0.5102 

0.419354838709677 1.182 1.169 1.117 0.9826 0.8737 0.4854 

0.451612903225806 1.179 1.166 1.08 0.9818 0.8613 0.4692 

0.483870967741936 1.135 1.124 1.078 0.9365 0.8465 0.4273 

0.516129032258065 1.13 1.119 1.028 0.9162 0.8164 0.4014 

0.548387096774194 1.083 1.073 1.003 0.9101 0.8086 0.387 

0.580645161290323 1.022 1.01 0.8979 0.8243 0.7527 0.3753 

0.612903225806452 0.9458 0.9356 0.8943 0.8101 0.7031 0.3686 

0.645161290322581 0.941 0.9321 0.8217 0.7048 0.5802 0.3634 

0.67741935483871 0.7946 0.786 0.7612 0.6049 0.5652 0.3622 

0.709677419354839 0.7608 0.752 0.7275 0.5965 0.5323 0.3549 
23

0.741935483870968 0.7066 0.6986 0.6662 0.5893 0.5078 0.3442 

0.774193548387097 0.6989 0.6912 0.6601 0.5829 0.4947 0.3366 

0.806451612903226 0.6874 0.6808 0.6539 0.5778 0.4929 0.2967 

0.838709677419355 0.6588 0.6523 0.6257 0.5707 0.4763 0.2828 

0.870967741935484 0.651 0.6438 0.6161 0.5701 0.4604 0.2802 

0.903225806451613 0.5539 0.5483 0.5267 0.4798 0.4475 0.2587 

0.935483870967742 0.5473 0.5408 0.5158 0.4681 0.3958 0.2434 

0.967741935483871 0.4726 0.4682 0.4551 0.4278 0.3855 0.2013 

0.1 1.5926 1.5726 1.5013 1.3432 1.0694 0.62308 

 Average of yearly averages: 0.441416666666667 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: CAcot8 

Metfile: w93193.dvf 

PRZM scenario: CAcotton_WirrigSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 15-10 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

NC Cotton 

Pre-emergent, Aerial 

stored as 1NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.7374 0.7227 0.6639 0.5525 0.4922 0.1971 

1962 1.555 1.518 1.418 1.223 1.096 0.4357 

1963 4.087 4.027 3.66 3.112 2.705 1.023 

1964 0.8887 0.8672 0.7837 0.7036 0.6488 0.3546 

1965 4.005 3.911 3.666 3.037 2.645 1.026 

1966 4.067 4.004 3.698 3.35 2.979 1.219 

1967 2.843 2.776 2.571 2.132 1.908 0.8673 

1968 2.757 2.701 2.483 2.115 1.859 0.7653 

1969 1.97 1.923 1.774 1.557 1.384 0.5845 

1970 1.312 1.283 1.249 1.076 0.9374 0.4237 

1971 2.315 2.263 2.05 1.844 1.657 0.6737 

1972 2.489 2.431 2.256 1.89 1.644 0.73 

1973 2.636 2.577 2.333 2.201 1.976 0.8148 
24

1974 2.475 2.418 2.233 1.879 1.633 0.6651 

1975 2.427 2.368 2.177 1.8 1.579 0.6364 

1976 1.84 1.797 1.666 1.396 1.209 0.5172 

1977 3.5 3.433 3.134 2.539 2.222 0.8935 

1978 1.381 1.348 1.23 1.177 1.053 0.4907 

1979 1.161 1.134 1.076 0.9675 0.8786 0.385 

1980 2.8 2.732 2.472 1.99 1.716 0.7401 

1981 2.72 2.657 2.51 2.228 1.997 0.8306 

1982 2.204 2.165 2.046 1.735 1.512 0.6257 

1983 4.31 4.219 3.996 3.337 2.891 1.093 

1984 4.801 4.721 4.278 3.51 3.032 1.184 

1985 1.693 1.666 1.579 1.447 1.338 0.6196 

1986 2.201 2.167 1.992 1.714 1.555 0.6464 

1987 1.011 0.9866 0.8894 0.7207 0.6729 0.347 

1988 0.5092 0.4971 0.4524 0.4122 0.3824 0.2025 

1989 2.144 2.102 1.979 1.635 1.407 0.5271 

1990 3.204 3.13 2.829 2.284 1.971 0.7677 

Sorted results 

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

0.032258064516129 4.801 4.721 4.278 3.51 3.032 1.219 

0.0645161290322581 4.31 4.219 3.996 3.35 2.979 1.184 

0.0967741935483871 4.087 4.027 3.698 3.337 2.891 1.093 

0.129032258064516 4.067 4.004 3.666 3.112 2.705 1.026 

0.161290322580645 4.005 3.911 3.66 3.037 2.645 1.023 

0.193548387096774 3.5 3.433 3.134 2.539 2.222 0.8935 

0.225806451612903 3.204 3.13 2.829 2.284 1.997 0.8673 

0.258064516129032 2.843 2.776 2.571 2.228 1.976 0.8306 

0.290322580645161 2.8 2.732 2.51 2.201 1.971 0.8148 

0.32258064516129 2.757 2.701 2.483 2.132 1.908 0.7677 

0.354838709677419 2.72 2.657 2.472 2.115 1.859 0.7653 

0.387096774193548 2.636 2.577 2.333 1.99 1.716 0.7401 

0.419354838709677 2.489 2.431 2.256 1.89 1.657 0.73 

0.451612903225806 2.475 2.418 2.233 1.879 1.644 0.6737 

0.483870967741936 2.427 2.368 2.177 1.844 1.633 0.6651 

0.516129032258065 2.315 2.263 2.05 1.8 1.579 0.6464 

0.548387096774194 2.204 2.167 2.046 1.735 1.555 0.6364 

0.580645161290323 2.201 2.165 1.992 1.714 1.512 0.6257 

0.612903225806452 2.144 2.102 1.979 1.635 1.407 0.6196 

0.645161290322581 1.97 1.923 1.774 1.557 1.384 0.5845 

0.67741935483871 1.84 1.797 1.666 1.447 1.338 0.5271 

0.709677419354839 1.693 1.666 1.579 1.396 1.209 0.5172 

0.741935483870968 1.555 1.518 1.418 1.223 1.096 0.4907 

0.774193548387097 1.381 1.348 1.249 1.177 1.053 0.4357 

0.806451612903226 1.312 1.283 1.23 1.076 0.9374 0.4237 

0.838709677419355 1.161 1.134 1.076 0.9675 0.8786 0.385 

0.870967741935484 1.011 0.9866 0.8894 0.7207 0.6729 0.3546 

0.903225806451613 0.8887 0.8672 0.7837 0.7036 0.6488 0.347 

0.935483870967742 0.7374 0.7227 0.6639 0.5525 0.4922 0.2025 

0.967741935483871 0.5092 0.4971 0.4524 0.4122 0.3824 0.1971 

0.1 4.085 4.0247 3.6948 3.3145 2.8724 1.0863 

 Average of yearly averages: 0.67621 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 1NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 
25

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 20-5 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant. Aerial 

stored as 2NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 1.882 1.838 1.688 1.422 1.246 0.463 

1962 1.313 1.282 1.195 1.029 0.9208 0.3981 

1963 3.184 3.136 2.845 2.41 2.09 0.8017 

1964 0.739 0.7213 0.6521 0.5794 0.5398 0.3042 

1965 2.505 2.453 2.298 1.899 1.675 0.6724 

1966 2.388 2.34 2.136 1.831 1.665 0.6988 

1967 1.476 1.453 1.327 1.26 1.148 0.4957 

1968 1.602 1.568 1.432 1.192 1.041 0.4378 

1969 1.893 1.849 1.79 1.571 1.383 0.5565 

1970 1.51 1.476 1.367 1.209 1.104 0.4823 

1971 2.677 2.616 2.433 2.126 1.866 0.7325 

1972 3.891 3.819 3.591 3.221 2.874 1.141 

1973 1.432 1.399 1.272 1.127 0.9926 0.4769 

1974 3.196 3.123 2.93 2.478 2.183 0.8524 

1975 1.473 1.44 1.325 1.083 0.9516 0.4312 

1976 2.173 2.123 2.033 1.74 1.507 0.6025 

1977 1.994 1.961 1.782 1.442 1.25 0.5345 

1978 3.147 3.082 2.921 2.474 2.175 0.8469 

1979 2.092 2.045 1.937 1.689 1.507 0.6289 

1980 2.324 2.268 2.056 1.938 1.787 0.7373 

1981 1.858 1.814 1.761 1.498 1.319 0.5728 

1982 1.572 1.545 1.454 1.231 1.071 0.4475 

1983 2.292 2.243 2.101 1.734 1.495 0.59 

1984 3.188 3.138 2.841 2.315 1.996 0.8009 

1985 2.373 2.319 2.173 1.971 1.764 0.7306 

1986 3.096 3.034 2.766 2.29 2.007 0.7999 

1987 0.991 0.967 0.8727 0.7696 0.7174 0.3746 

1988 1.227 1.205 1.099 0.9165 0.7944 0.333 

1989 4.535 4.453 4.18 3.614 3.17 1.196 

1990 3.853 3.765 3.517 3.164 2.778 1.108 

Sorted results 

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

0.032258064516129 4.535 4.453 4.18 3.614 3.17 1.196 

0.0645161290322581 3.891 3.819 3.591 3.221 2.874 1.141 

0.0967741935483871 3.853 3.765 3.517 3.164 2.778 1.108 

0.129032258064516 3.196 3.138 2.93 2.478 2.183 0.8524 

0.161290322580645 3.188 3.136 2.921 2.474 2.175 0.8469 

0.193548387096774 3.184 3.123 2.845 2.41 2.09 0.8017 

0.225806451612903 3.147 3.082 2.841 2.315 2.007 0.8009 

0.258064516129032 3.096 3.034 2.766 2.29 1.996 0.7999 

0.290322580645161 2.677 2.616 2.433 2.126 1.866 0.7373 

0.32258064516129 2.505 2.453 2.298 1.971 1.787 0.7325 

0.354838709677419 2.388 2.34 2.173 1.938 1.764 0.7306 
26

0.387096774193548 2.373 2.319 2.136 1.899 1.675 0.6988 

0.419354838709677 2.324 2.268 2.101 1.831 1.665 0.6724 

0.451612903225806 2.292 2.243 2.056 1.74 1.507 0.6289 

0.483870967741936 2.173 2.123 2.033 1.734 1.507 0.6025 

0.516129032258065 2.092 2.045 1.937 1.689 1.495 0.59 

0.548387096774194 1.994 1.961 1.79 1.571 1.383 0.5728 

0.580645161290323 1.893 1.849 1.782 1.498 1.319 0.5565 

0.612903225806452 1.882 1.838 1.761 1.442 1.25 0.5345 

0.645161290322581 1.858 1.814 1.688 1.422 1.246 0.4957 

0.67741935483871 1.602 1.568 1.454 1.26 1.148 0.4823 

0.709677419354839 1.572 1.545 1.432 1.231 1.104 0.4769 

0.741935483870968 1.51 1.476 1.367 1.209 1.071 0.463 

0.774193548387097 1.476 1.453 1.327 1.192 1.041 0.4475 

0.806451612903226 1.473 1.44 1.325 1.127 0.9926 0.4378 

0.838709677419355 1.432 1.399 1.272 1.083 0.9516 0.4312 

0.870967741935484 1.313 1.282 1.195 1.029 0.9208 0.3981 

0.903225806451613 1.227 1.205 1.099 0.9165 0.7944 0.3746 

0.935483870967742 0.991 0.967 0.8727 0.7696 0.7174 0.333 

0.967741935483871 0.739 0.7213 0.6521 0.5794 0.5398 0.3042 

0.1 3.7873 3.7023 3.4583 3.0954 2.7185 1.08244 

 Average of yearly averages: 0.641596666666667 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 2NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.088 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 1-5 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant, Ground, 1 application 

stored as 3NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 2.646 2.585 2.373 2.003 1.758 0.6508 

1962 1.847 1.803 1.684 1.446 1.29 0.5519 

1963 4.596 4.526 4.106 3.475 3.014 1.148 

1964 1.007 0.983 0.8887 0.7944 0.7316 0.4128 
27

1965 3.615 3.538 3.314 2.737 2.407 0.9573 

1966 3.407 3.339 3.048 2.596 2.367 0.9964 

1967 2.059 2.028 1.851 1.766 1.614 0.6955 

1968 2.253 2.205 2.014 1.678 1.466 0.6102 

1969 2.68 2.618 2.54 2.231 1.967 0.7855 

1970 2.103 2.055 1.9 1.679 1.539 0.6759 

1971 3.843 3.755 3.48 3.048 2.676 1.046 

1972 5.622 5.518 5.193 4.654 4.156 1.65 

1973 2.002 1.956 1.774 1.58 1.394 0.6678 

1974 4.588 4.484 4.211 3.556 3.133 1.223 

1975 2.069 2.02 1.86 1.52 1.328 0.6005 

1976 3.086 3.014 2.889 2.478 2.148 0.8542 

1977 2.832 2.784 2.531 2.047 1.77 0.7536 

1978 4.519 4.424 4.191 3.554 3.123 1.216 

1979 2.966 2.9 2.744 2.388 2.134 0.8929 

1980 3.357 3.276 2.96 2.775 2.565 1.054 

1981 2.637 2.574 2.492 2.126 1.867 0.8105 

1982 2.22 2.182 2.053 1.737 1.511 0.625 

1983 3.268 3.198 2.996 2.474 2.13 0.8354 

1984 4.603 4.529 4.101 3.343 2.881 1.147 

1985 3.386 3.31 3.096 2.805 2.514 1.043 

1986 4.453 4.364 3.979 3.296 2.89 1.146 

1987 1.382 1.349 1.217 1.048 0.9836 0.5174 

1988 1.686 1.654 1.509 1.262 1.094 0.4555 

1989 6.556 6.438 6.044 5.231 4.591 1.732 

1990 5.556 5.43 5.076 4.568 4.013 1.603 

Sorted results 

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

0.032258064516129 6.556 6.438 6.044 5.231 4.591 1.732 

0.0645161290322581 5.622 5.518 5.193 4.654 4.156 1.65 

0.0967741935483871 5.556 5.43 5.076 4.568 4.013 1.603 

0.129032258064516 4.603 4.529 4.211 3.556 3.133 1.223 

0.161290322580645 4.596 4.526 4.191 3.554 3.123 1.216 

0.193548387096774 4.588 4.484 4.106 3.475 3.014 1.148 

0.225806451612903 4.519 4.424 4.101 3.343 2.89 1.147 

0.258064516129032 4.453 4.364 3.979 3.296 2.881 1.146 

0.290322580645161 3.843 3.755 3.48 3.048 2.676 1.054 

0.32258064516129 3.615 3.538 3.314 2.805 2.565 1.046 

0.354838709677419 3.407 3.339 3.096 2.775 2.514 1.043 

0.387096774193548 3.386 3.31 3.048 2.737 2.407 0.9964 

0.419354838709677 3.357 3.276 2.996 2.596 2.367 0.9573 

0.451612903225806 3.268 3.198 2.96 2.478 2.148 0.8929 

0.483870967741936 3.086 3.014 2.889 2.474 2.134 0.8542 

0.516129032258065 2.966 2.9 2.744 2.388 2.13 0.8354 

0.548387096774194 2.832 2.784 2.54 2.231 1.967 0.8105 

0.580645161290323 2.68 2.618 2.531 2.126 1.867 0.7855 

0.612903225806452 2.646 2.585 2.492 2.047 1.77 0.7536 

0.645161290322581 2.637 2.574 2.373 2.003 1.758 0.6955 

0.67741935483871 2.253 2.205 2.053 1.766 1.614 0.6759 

0.709677419354839 2.22 2.182 2.014 1.737 1.539 0.6678 

0.741935483870968 2.103 2.055 1.9 1.679 1.511 0.6508 

0.774193548387097 2.069 2.028 1.86 1.678 1.466 0.625 

0.806451612903226 2.059 2.02 1.851 1.58 1.394 0.6102 

0.838709677419355 2.002 1.956 1.774 1.52 1.328 0.6005 

0.870967741935484 1.847 1.803 1.684 1.446 1.29 0.5519 

0.903225806451613 1.686 1.654 1.509 1.262 1.094 0.5174 

0.935483870967742 1.382 1.349 1.217 1.048 0.9836 0.4555 

0.967741935483871 1.007 0.983 0.8887 0.7944 0.7316 0.4128 

0.1 5.4607 5.3399 4.9895 4.4668 3.925 1.565 

 Average of yearly averages: 0.911903333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 3NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 
28

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 1-5 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant, Ground, 2 applications 

stored as 4NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 2.817 2.752 2.641 2.495 2.321 0.9079 

1962 3.992 3.897 3.644 3.132 2.795 1.153 

1963 9.326 9.185 8.333 7.055 6.119 2.33 

1964 2.167 2.114 1.911 1.723 1.571 0.8578 

1965 9.26 9.05 8.479 7.011 6.114 2.395 

1966 7.948 7.804 7.151 6.193 5.423 2.335 

1967 5.553 5.421 4.989 4.168 3.881 1.73 

1968 5.639 5.522 5.056 4.249 3.72 1.541 

1969 5.663 5.533 5.369 4.72 4.162 1.677 

1970 3.538 3.458 3.235 2.771 2.717 1.311 

1971 9.459 9.249 8.385 7.447 6.611 2.589 

1972 10.21 10.03 9.544 8.533 7.66 3.256 

1973 5.051 4.936 4.467 4.082 3.629 1.65 

1974 7.606 7.433 6.953 5.813 5.181 2.13 

1975 4.827 4.71 4.339 3.551 3.097 1.344 

1976 8.677 8.484 8.182 7.121 6.211 2.414 

1977 6.905 6.782 6.174 4.995 4.335 1.86 

1978 5.257 5.144 4.722 4.468 4.192 1.826 

1979 4.68 4.612 4.312 3.904 3.519 1.533 

1980 7.22 7.047 6.37 5.963 5.515 2.241 

1981 6.32 6.171 5.874 5.136 4.568 1.938 

1982 4.556 4.478 4.213 3.566 3.103 1.308 

1983 8.658 8.481 8.001 6.634 5.725 2.189 

1984 11.48 11.29 10.22 8.369 7.223 2.821 

1985 6.095 5.958 5.413 4.865 4.366 1.973 

1986 8.998 8.817 8.04 6.66 5.839 2.304 

1987 2.948 2.877 2.598 2.243 2.105 1.087 

1988 4.142 4.063 3.713 3.129 2.724 1.105 

1989 7.916 7.787 7.169 6.425 5.975 2.426 

1990 9.725 9.502 8.599 7.066 6.397 2.684 

Sorted results 

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

0.032258064516129 11.48 11.29 10.22 8.533 7.66 3.256 

0.0645161290322581 10.21 10.03 9.544 8.369 7.223 2.821 
29

0.0967741935483871 9.725 9.502 8.599 7.447 6.611 2.684 

0.129032258064516 9.459 9.249 8.479 7.121 6.397 2.589 

0.161290322580645 9.326 9.185 8.385 7.066 6.211 2.426 

0.193548387096774 9.26 9.05 8.333 7.055 6.119 2.414 

0.225806451612903 8.998 8.817 8.182 7.011 6.114 2.395 

0.258064516129032 8.677 8.484 8.04 6.66 5.975 2.335 

0.290322580645161 8.658 8.481 8.001 6.634 5.839 2.33 

0.32258064516129 7.948 7.804 7.169 6.425 5.725 2.304 

0.354838709677419 7.916 7.787 7.151 6.193 5.515 2.241 

0.387096774193548 7.606 7.433 6.953 5.963 5.423 2.189 

0.419354838709677 7.22 7.047 6.37 5.813 5.181 2.13 

0.451612903225806 6.905 6.782 6.174 5.136 4.568 1.973 

0.483870967741936 6.32 6.171 5.874 4.995 4.366 1.938 

0.516129032258065 6.095 5.958 5.413 4.865 4.335 1.86 

0.548387096774194 5.663 5.533 5.369 4.72 4.192 1.826 

0.580645161290323 5.639 5.522 5.056 4.468 4.162 1.73 

0.612903225806452 5.553 5.421 4.989 4.249 3.881 1.677 

0.645161290322581 5.257 5.144 4.722 4.168 3.72 1.65 

0.67741935483871 5.051 4.936 4.467 4.082 3.629 1.541 

0.709677419354839 4.827 4.71 4.339 3.904 3.519 1.533 

0.741935483870968 4.68 4.612 4.312 3.566 3.103 1.344 

0.774193548387097 4.556 4.478 4.213 3.551 3.097 1.311 

0.806451612903226 4.142 4.063 3.713 3.132 2.795 1.308 

0.838709677419355 3.992 3.897 3.644 3.129 2.724 1.153 

0.870967741935484 3.538 3.458 3.235 2.771 2.717 1.105 

0.903225806451613 2.948 2.877 2.641 2.495 2.321 1.087 

0.935483870967742 2.817 2.752 2.598 2.243 2.105 0.9079 

0.967741935483871 2.167 2.114 1.911 1.723 1.571 0.8578 

0.1 9.6984 9.4767 8.587 7.4144 6.5896 2.6745 

 Average of yearly averages: 1.89719 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 4NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 1-5 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 0.1249 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) 

Post Plant, Ground, 1 application 

stored as 5NCcot.out 
30

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 1.239 1.216 1.112 0.9286 0.8097 0.2947 

1962 3.171 3.095 2.959 2.691 2.372 0.895 

1963 0.6666 0.6506 0.588 0.5065 0.4555 0.2944 

1964 1.764 1.721 1.629 1.517 1.383 0.5472 

1965 7.403 7.227 6.71 5.551 4.815 1.785 

1966 3.455 3.371 3.164 2.682 2.408 1.091 

1967 7.442 7.265 6.878 5.869 5.111 1.936 

1968 2.192 2.15 1.95 1.659 1.482 0.8175 

1969 2.693 2.63 2.551 2.247 2.003 0.8184 

1970 2.674 2.63 2.515 2.207 1.93 0.7843 

1971 1.803 1.762 1.607 1.383 1.212 0.5572 

1972 4.613 4.504 4.24 3.663 3.195 1.199 

1973 4.558 4.446 4.121 3.386 2.919 1.188 

1974 1.103 1.087 0.9876 0.9056 0.8303 0.4591 

1975 2.241 2.186 1.985 1.604 1.382 0.5394 

1976 0.944 0.9218 0.847 0.7191 0.6326 0.3406 

1977 1.301 1.27 1.157 1.079 0.9945 0.4486 

1978 2.359 2.302 2.105 2.009 1.812 0.7568 

1979 2.15 2.112 1.97 1.65 1.506 0.6935 

1980 4.313 4.206 3.801 3.05 2.634 1.02 

1981 3.509 3.419 3.095 2.566 2.246 0.9333 

1982 6.066 5.929 5.397 4.414 3.8 1.487 

1983 1.585 1.548 1.449 1.208 1.052 0.5473 

1984 1.74 1.72 1.59 1.374 1.215 0.5015 

1985 1.943 1.895 1.726 1.548 1.372 0.5649 

1986 1.316 1.283 1.214 1.108 1.011 0.4497 

1987 1.457 1.421 1.281 1.039 0.9805 0.4543 

1988 0.9812 0.9581 0.8669 0.8058 0.7715 0.3854 

1989 3.828 3.755 3.55 2.954 2.55 0.9522 

1990 0.5474 0.5339 0.5087 0.4587 0.4094 0.2849 

Sorted results 

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

0.032258064516129 7.442 7.265 6.878 5.869 5.111 1.936 

0.0645161290322581 7.403 7.227 6.71 5.551 4.815 1.785 

0.0967741935483871 6.066 5.929 5.397 4.414 3.8 1.487 

0.129032258064516 4.613 4.504 4.24 3.663 3.195 1.199 

0.161290322580645 4.558 4.446 4.121 3.386 2.919 1.188 

0.193548387096774 4.313 4.206 3.801 3.05 2.634 1.091 

0.225806451612903 3.828 3.755 3.55 2.954 2.55 1.02 

0.258064516129032 3.509 3.419 3.164 2.691 2.408 0.9522 

0.290322580645161 3.455 3.371 3.095 2.682 2.372 0.9333 

0.32258064516129 3.171 3.095 2.959 2.566 2.246 0.895 

0.354838709677419 2.693 2.63 2.551 2.247 2.003 0.8184 

0.387096774193548 2.674 2.63 2.515 2.207 1.93 0.8175 

0.419354838709677 2.359 2.302 2.105 2.009 1.812 0.7843 

0.451612903225806 2.241 2.186 1.985 1.659 1.506 0.7568 

0.483870967741936 2.192 2.15 1.97 1.65 1.482 0.6935 

0.516129032258065 2.15 2.112 1.95 1.604 1.383 0.5649 

0.548387096774194 1.943 1.895 1.726 1.548 1.382 0.5572 

0.580645161290323 1.803 1.762 1.629 1.517 1.372 0.5473 

0.612903225806452 1.764 1.721 1.607 1.383 1.215 0.5472 

0.645161290322581 1.74 1.72 1.59 1.374 1.212 0.5394 

0.67741935483871 1.585 1.548 1.449 1.208 1.052 0.5015 

0.709677419354839 1.457 1.421 1.281 1.108 1.011 0.4591 

0.741935483870968 1.316 1.283 1.214 1.079 0.9945 0.4543 

0.774193548387097 1.301 1.27 1.157 1.039 0.9805 0.4497 

0.806451612903226 1.239 1.216 1.112 0.9286 0.8303 0.4486 

0.838709677419355 1.103 1.087 0.9876 0.9056 0.8097 0.3854 

0.870967741935484 0.9812 0.9581 0.8669 0.8058 0.7715 0.3406 

0.903225806451613 0.944 0.9218 0.847 0.7191 0.6326 0.2947 

0.935483870967742 0.6666 0.6506 0.588 0.5065 0.4555 0.2944 

0.967741935483871 0.5474 0.5339 0.5087 0.4587 0.4094 0.2849 
31

0.1 5.9207 5.7865 5.2813 4.3389 3.7395 1.4582 

 Average of yearly averages: 0.76754 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 5NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 4-6 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Post Plant, Ground, 2 applications 

stored as 6NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 3.405 3.347 3.068 2.576 2.266 0.813 

1962 6.226 6.075 5.679 4.869 4.328 1.723 

1963 1.725 1.683 1.52 1.34 1.2 0.6973 

1964 3.99 3.893 3.695 3.437 3.15 1.26 

1965 9.73 9.605 8.868 7.701 6.982 2.778 

1966 8.994 8.783 8.284 7.11 6.457 2.731 

1967 15.36 15 14.2 12.12 10.56 4.091 

1968 5.544 5.45 4.953 4.156 3.669 1.889 

1969 3.955 3.888 3.617 3.49 3.277 1.52 

1970 5.812 5.715 5.457 4.799 4.199 1.678 

1971 4.612 4.509 4.102 3.535 3.109 1.369 

1972 9.475 9.252 8.713 7.534 6.573 2.492 

1973 13.74 13.4 12.37 10.21 8.804 3.408 

1974 2.712 2.67 2.426 2.285 2.12 1.234 

1975 5.776 5.634 5.114 4.133 3.563 1.374 

1976 2.687 2.624 2.398 2.047 1.803 0.8734 

1977 3.371 3.291 2.999 2.76 2.532 1.147 

1978 5.407 5.274 4.762 4.218 3.755 1.679 

1979 5.506 5.393 4.963 4.224 3.749 1.633 

1980 10.47 10.21 9.232 7.42 6.419 2.498 

1981 8.009 7.806 7.066 5.881 5.156 2.158 

1982 6.638 6.478 5.881 5.455 4.873 2.097 

1983 2.155 2.104 1.909 1.643 1.48 0.845 

1984 4.062 4.022 3.715 3.191 2.825 1.138 
32

1985 4.801 4.685 4.277 3.851 3.437 1.4 

1986 3.1 3.023 2.866 2.592 2.38 1.066 

1987 3.206 3.127 2.82 2.291 2.185 1.021 

1988 2.109 2.057 1.915 1.813 1.722 0.9015 

1989 5.192 5.066 4.834 4.262 3.855 1.56 

1990 1.173 1.143 1.092 0.9944 0.8896 0.5641 

Sorted results 

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

0.032258064516129 15.36 15 14.2 12.12 10.56 4.091 

0.0645161290322581 13.74 13.4 12.37 10.21 8.804 3.408 

0.0967741935483871 10.47 10.21 9.232 7.701 6.982 2.778 

0.129032258064516 9.73 9.605 8.868 7.534 6.573 2.731 

0.161290322580645 9.475 9.252 8.713 7.42 6.457 2.498 

0.193548387096774 8.994 8.783 8.284 7.11 6.419 2.492 

0.225806451612903 8.009 7.806 7.066 5.881 5.156 2.158 

0.258064516129032 6.638 6.478 5.881 5.455 4.873 2.097 

0.290322580645161 6.226 6.075 5.679 4.869 4.328 1.889 

0.32258064516129 5.812 5.715 5.457 4.799 4.199 1.723 

0.354838709677419 5.776 5.634 5.114 4.262 3.855 1.679 

0.387096774193548 5.544 5.45 4.963 4.224 3.755 1.678 

0.419354838709677 5.506 5.393 4.953 4.218 3.749 1.633 

0.451612903225806 5.407 5.274 4.834 4.156 3.669 1.56 

0.483870967741936 5.192 5.066 4.762 4.133 3.563 1.52 

0.516129032258065 4.801 4.685 4.277 3.851 3.437 1.4 

0.548387096774194 4.612 4.509 4.102 3.535 3.277 1.374 

0.580645161290323 4.062 4.022 3.715 3.49 3.15 1.369 

0.612903225806452 3.99 3.893 3.695 3.437 3.109 1.26 

0.645161290322581 3.955 3.888 3.617 3.191 2.825 1.234 

0.67741935483871 3.405 3.347 3.068 2.76 2.532 1.147 

0.709677419354839 3.371 3.291 2.999 2.592 2.38 1.138 

0.741935483870968 3.206 3.127 2.866 2.576 2.266 1.066 

0.774193548387097 3.1 3.023 2.82 2.291 2.185 1.021 

0.806451612903226 2.712 2.67 2.426 2.285 2.12 0.9015 

0.838709677419355 2.687 2.624 2.398 2.047 1.803 0.8734 

0.870967741935484 2.155 2.104 1.915 1.813 1.722 0.845 

0.903225806451613 2.109 2.057 1.909 1.643 1.48 0.813 

0.935483870967742 1.725 1.683 1.52 1.34 1.2 0.6973 

0.967741935483871 1.173 1.143 1.092 0.9944 0.8896 0.5641 

0.1 10.396 10.1495 9.1956 7.6843 6.9411 2.7733 

 Average of yearly averages: 1.65461 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 6NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 4-6 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 0.1249 kg/ha 
33

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) 

Fall, Ground 

stored as 7NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 3.62 3.543 3.38 2.037 1.411 0.3478 

1962 11.31 11.07 10.31 8.3 5.641 2.231 

1963 13.8 13.5 12.31 10.05 6.88 3.464 

1964 8.207 8.04 7.393 6.163 5.41 2.379 

1965 2.569 2.516 2.309 1.939 1.71 0.7834 

1966 2.433 2.38 2.28 2.035 1.554 0.9291 

1967 2.586 2.542 2.455 1.83 1.429 0.8175 

1968 7.342 7.184 6.682 6.277 4.966 1.807 

1969 4.429 4.342 3.997 3.349 2.949 1.345 

1970 4.321 4.256 3.96 3.335 2.606 1.143 

1971 3.085 3.041 2.801 2.587 2.022 1.142 

1972 5.266 5.152 4.84 4.042 2.847 1.237 

1973 4.517 4.426 3.942 2.651 2.325 1.215 

1974 4.136 4.049 3.715 3.083 2.695 1.345 

1975 8.529 8.34 7.703 5.729 3.946 1.429 

1976 5.364 5.255 4.831 4.435 3.6 2.236 

1977 7.035 6.882 6.283 5.424 4.035 1.958 

1978 4.551 4.46 4.158 3.496 3.078 1.635 

1979 6.262 6.125 5.678 4.787 3.294 1.542 

1980 3.861 3.783 3.555 3.037 2.681 1.433 

1981 7.84 7.665 7.011 5.892 4.399 1.644 

1982 5.792 5.667 5.413 4.844 3.695 2.085 

1983 6.934 6.787 6.579 6.291 4.877 2.143 

1984 5.217 5.114 4.711 3.935 3.457 1.631 

1985 7.133 7.019 6.548 5.394 3.698 1.659 

1986 4.828 4.73 4.344 3.63 3.185 1.628 

1987 2.384 2.336 2.151 1.815 1.596 0.8082 

1988 6.226 6.09 5.606 4.716 3.545 1.157 

1989 3.426 3.357 3.083 2.771 2.258 1.417 

1990 8.303 8.113 7.448 6.292 4.755 1.738 

Sorted results 

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

0.032258064516129 13.8 13.5 12.31 10.05 6.88 3.464 

0.0645161290322581 11.31 11.07 10.31 8.3 5.641 2.379 

0.0967741935483871 8.529 8.34 7.703 6.292 5.41 2.236 

0.129032258064516 8.303 8.113 7.448 6.291 4.966 2.231 

0.161290322580645 8.207 8.04 7.393 6.277 4.877 2.143 

0.193548387096774 7.84 7.665 7.011 6.163 4.755 2.085 

0.225806451612903 7.342 7.184 6.682 5.892 4.399 1.958 

0.258064516129032 7.133 7.019 6.579 5.729 4.035 1.807 

0.290322580645161 7.035 6.882 6.548 5.424 3.946 1.738 

0.32258064516129 6.934 6.787 6.283 5.394 3.698 1.659 

0.354838709677419 6.262 6.125 5.678 4.844 3.695 1.644 

0.387096774193548 6.226 6.09 5.606 4.787 3.6 1.635 

0.419354838709677 5.792 5.667 5.413 4.716 3.545 1.631 

0.451612903225806 5.364 5.255 4.84 4.435 3.457 1.628 

0.483870967741936 5.266 5.152 4.831 4.042 3.294 1.542 

0.516129032258065 5.217 5.114 4.711 3.935 3.185 1.433 

0.548387096774194 4.828 4.73 4.344 3.63 3.078 1.429 

0.580645161290323 4.551 4.46 4.158 3.496 2.949 1.417 

0.612903225806452 4.517 4.426 3.997 3.349 2.847 1.345 

0.645161290322581 4.429 4.342 3.96 3.335 2.695 1.345 
34

0.67741935483871 4.321 4.256 3.942 3.083 2.681 1.237 

0.709677419354839 4.136 4.049 3.715 3.037 2.606 1.215 

0.741935483870968 3.861 3.783 3.555 2.771 2.325 1.157 

0.774193548387097 3.62 3.543 3.38 2.651 2.258 1.143 

0.806451612903226 3.426 3.357 3.083 2.587 2.022 1.142 

0.838709677419355 3.085 3.041 2.801 2.037 1.71 0.9291 

0.870967741935484 2.586 2.542 2.455 2.035 1.596 0.8175 

0.903225806451613 2.569 2.516 2.309 1.939 1.554 0.8082 

0.935483870967742 2.433 2.38 2.28 1.83 1.429 0.7834 

0.967741935483871 2.384 2.336 2.151 1.815 1.411 0.3478 

0.1 8.5064 8.3173 7.6775 6.2919 5.3656 2.2355 

 Average of yearly averages: 1.5443 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 7NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 15-10 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Fall, Aerial 

stored as 8NCcot.out 

Chemical: pyroxasulfone 

PRZM environment: NCcottonSTD.txt modified Tueday, 29 May 2007 at 12:58:38 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w13722.dvf modified Tueday, 26 August 2008 at 05:14:28 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 2.508 2.455 2.344 1.445 1.018 0.251 

1962 7.756 7.587 7.067 5.695 3.89 1.541 

1963 9.445 9.238 8.426 6.88 4.729 2.377 

1964 5.613 5.499 5.057 4.216 3.701 1.641 

1965 1.789 1.753 1.608 1.35 1.191 0.559 

1966 1.729 1.692 1.625 1.445 1.117 0.6579 

1967 1.813 1.782 1.722 1.306 1.032 0.5821 

1968 5.06 4.951 4.606 4.333 3.432 1.253 

1969 3.051 2.991 2.754 2.307 2.032 0.94 

1970 3.02 2.974 2.767 2.329 1.831 0.8029 

1971 2.191 2.159 1.988 1.827 1.435 0.8022 

1972 3.646 3.567 3.351 2.807 1.994 0.8665 

1973 3.116 3.054 2.726 1.834 1.609 0.852 
35

1974 2.852 2.792 2.561 2.126 1.859 0.9398 

1975 5.863 5.734 5.295 3.951 2.739 0.9971 

1976 3.685 3.611 3.319 3.083 2.505 1.544 

1977 4.857 4.752 4.338 3.745 2.801 1.356 

1978 3.134 3.072 2.863 2.408 2.119 1.137 

1979 4.326 4.232 3.922 3.312 2.297 1.073 

1980 2.665 2.611 2.453 2.095 1.849 0.9993 

1981 5.412 5.291 4.84 4.066 3.047 1.143 

1982 4.016 3.929 3.758 3.357 2.57 1.442 

1983 4.772 4.67 4.531 4.339 3.371 1.481 

1984 3.586 3.514 3.238 2.705 2.376 1.134 

1985 4.909 4.831 4.506 3.723 2.571 1.153 

1986 3.321 3.254 2.989 2.498 2.192 1.132 

1987 1.663 1.63 1.501 1.266 1.113 0.5757 

1988 4.313 4.219 3.883 3.266 2.468 0.8121 

1989 2.371 2.323 2.136 1.944 1.563 0.9886 

1990 5.728 5.597 5.14 4.34 3.288 1.206 

Sorted results 

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

0.032258064516129 9.445 9.238 8.426 6.88 4.729 2.377 

0.0645161290322581 7.756 7.587 7.067 5.695 3.89 1.641 

0.0967741935483871 5.863 5.734 5.295 4.34 3.701 1.544 

0.129032258064516 5.728 5.597 5.14 4.339 3.432 1.541 

0.161290322580645 5.613 5.499 5.057 4.333 3.371 1.481 

0.193548387096774 5.412 5.291 4.84 4.216 3.288 1.442 

0.225806451612903 5.06 4.951 4.606 4.066 3.047 1.356 

0.258064516129032 4.909 4.831 4.531 3.951 2.801 1.253 

0.290322580645161 4.857 4.752 4.506 3.745 2.739 1.206 

0.32258064516129 4.772 4.67 4.338 3.723 2.571 1.153 

0.354838709677419 4.326 4.232 3.922 3.357 2.57 1.143 

0.387096774193548 4.313 4.219 3.883 3.312 2.505 1.137 

0.419354838709677 4.016 3.929 3.758 3.266 2.468 1.134 

0.451612903225806 3.685 3.611 3.351 3.083 2.376 1.132 

0.483870967741936 3.646 3.567 3.319 2.807 2.297 1.073 

0.516129032258065 3.586 3.514 3.238 2.705 2.192 0.9993 

0.548387096774194 3.321 3.254 2.989 2.498 2.119 0.9971 

0.580645161290323 3.134 3.072 2.863 2.408 2.032 0.9886 

0.612903225806452 3.116 3.054 2.767 2.329 1.994 0.94 

0.645161290322581 3.051 2.991 2.754 2.307 1.859 0.9398 

0.67741935483871 3.02 2.974 2.726 2.126 1.849 0.8665 

0.709677419354839 2.852 2.792 2.561 2.095 1.831 0.852 

0.741935483870968 2.665 2.611 2.453 1.944 1.609 0.8121 

0.774193548387097 2.508 2.455 2.344 1.834 1.563 0.8029 

0.806451612903226 2.371 2.323 2.136 1.827 1.435 0.8022 

0.838709677419355 2.191 2.159 1.988 1.445 1.191 0.6579 

0.870967741935484 1.813 1.782 1.722 1.445 1.117 0.5821 

0.903225806451613 1.789 1.753 1.625 1.35 1.113 0.5757 

0.935483870967742 1.729 1.692 1.608 1.306 1.032 0.559 

0.967741935483871 1.663 1.63 1.501 1.266 1.018 0.251 

0.1 5.8495 5.7203 5.2795 4.3399 3.6741 1.5437 

 Average of yearly averages: 1.07464 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 8NCcot 

Metfile: w13722.dvf 

PRZM scenario: NCcottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 
36

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 15-10 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

MS Cotton 

Pre-emergent, Aerial 

stored as 1MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.exv modified Tueday, 26 August 2008 at 05:14:08 

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 05:16:12 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.8947 0.8899 0.8701 0.6042 0.4522 0.2089 

1962 0.9374 0.9314 0.9066 0.8508 0.8056 0.6591 

1963 1.958 1.946 1.891 1.766 1.672 1.054 

1964 1.025 1.02 0.9943 0.9355 0.8881 0.7961 

1965 0.9406 0.9352 0.9104 0.8544 0.8117 0.6894 

1966 0.7957 0.7905 0.7676 0.7157 0.6767 0.5513 

1967 0.7236 0.7198 0.7009 0.6559 0.6208 0.4937 

1968 1.056 1.05 1.035 0.9922 0.8716 0.5816 

1969 1.022 1.016 0.9887 0.9251 0.8774 0.7288 

1970 1.189 1.183 1.158 0.8307 0.7037 0.6261 

1971 1.172 1.165 1.136 1.081 1.032 0.858 

1972 0.7297 0.7253 0.7051 0.6641 0.6318 0.5235 

1973 0.7366 0.7321 0.7108 0.6609 0.6233 0.5269 

1974 1.02 1.015 0.9945 0.9164 0.759 0.5579 

1975 1.049 1.044 1.017 0.952 0.9023 0.7787 

1976 1.048 1.041 1.013 0.9603 0.9279 0.7818 

1977 0.9426 0.9365 0.9176 0.8717 0.8249 0.6679 

1978 1.087 1.08 1.049 0.9766 0.9212 0.6859 

1979 0.7896 0.7847 0.7624 0.7105 0.6704 0.533 

1980 0.6372 0.6332 0.6158 0.5768 0.546 0.4038 

1981 0.7885 0.7834 0.7606 0.7066 0.663 0.4995 

1982 0.7158 0.7121 0.7003 0.6887 0.6477 0.4754 

1983 2.567 2.548 2.465 2.285 2.153 1.289 

1984 1.125 1.118 1.086 1.009 0.9741 0.7907 

1985 0.7122 0.7074 0.6868 0.6395 0.6007 0.4987 

1986 1.002 0.9965 0.7024 0.6321 0.5952 0.4772 

1987 1.24 1.231 1.192 1.116 1.074 0.8645 

1988 0.749 0.7445 0.7246 0.679 0.6419 0.5041 

1989 0.6789 0.674 0.6588 0.631 0.5982 0.4546 

1990 1.224 1.215 1.171 1.074 1.004 0.6302 

Sorted results 

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

0.032258064516129 2.567 2.548 2.465 2.285 2.153 1.289 

0.0645161290322581 1.958 1.946 1.891 1.766 1.672 1.054 

0.0967741935483871 1.24 1.231 1.192 1.116 1.074 0.8645 

0.129032258064516 1.224 1.215 1.171 1.081 1.032 0.858 

0.161290322580645 1.189 1.183 1.158 1.074 1.004 0.7961 

0.193548387096774 1.172 1.165 1.136 1.009 0.9741 0.7907 

0.225806451612903 1.125 1.118 1.086 0.9922 0.9279 0.7818 

0.258064516129032 1.087 1.08 1.049 0.9766 0.9212 0.7787 

0.290322580645161 1.056 1.05 1.035 0.9603 0.9023 0.7288 
37

0.32258064516129 1.049 1.044 1.017 0.952 0.8881 0.6894 

0.354838709677419 1.048 1.041 1.013 0.9355 0.8774 0.6859 

0.387096774193548 1.025 1.02 0.9945 0.9251 0.8716 0.6679 

0.419354838709677 1.022 1.016 0.9943 0.9164 0.8249 0.6591 

0.451612903225806 1.02 1.015 0.9887 0.8717 0.8117 0.6302 

0.483870967741936 1.002 0.9965 0.9176 0.8544 0.8056 0.6261 

0.516129032258065 0.9426 0.9365 0.9104 0.8508 0.759 0.5816 

0.548387096774194 0.9406 0.9352 0.9066 0.8307 0.7037 0.5579 

0.580645161290323 0.9374 0.9314 0.8701 0.7157 0.6767 0.5513 

0.612903225806452 0.8947 0.8899 0.7676 0.7105 0.6704 0.533 

0.645161290322581 0.7957 0.7905 0.7624 0.7066 0.663 0.5269 

0.67741935483871 0.7896 0.7847 0.7606 0.6887 0.6477 0.5235 

0.709677419354839 0.7885 0.7834 0.7246 0.679 0.6419 0.5041 

0.741935483870968 0.749 0.7445 0.7108 0.6641 0.6318 0.4995 

0.774193548387097 0.7366 0.7321 0.7051 0.6609 0.6233 0.4987 

0.806451612903226 0.7297 0.7253 0.7024 0.6559 0.6208 0.4937 

0.838709677419355 0.7236 0.7198 0.7009 0.6395 0.6007 0.4772 

0.870967741935484 0.7158 0.7121 0.7003 0.6321 0.5982 0.4754 

0.903225806451613 0.7122 0.7074 0.6868 0.631 0.5952 0.4546 

0.935483870967742 0.6789 0.674 0.6588 0.6042 0.546 0.4038 

0.967741935483871 0.6372 0.6332 0.6158 0.5768 0.4522 0.2089 

0.1 1.2384 1.2294 1.1899 1.1125 1.0698 0.86385 

 Average of yearly averages: 0.639676666666667 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 1MScot 

Metfile: w93193.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 25-4 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant. Aerial 

stored as 2MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 0.9493 0.9185 0.8034 0.6938 0.5884 0.1981 

1962 7.73 7.565 6.644 5.194 4.295 1.369 
38

1963 1.329 1.286 1.153 0.909 0.7654 0.2819 

1964 6.093 5.891 5.395 4.105 3.364 1.066 

1965 0.6998 0.6769 0.5904 0.4479 0.3872 0.1441 

1966 1.692 1.642 1.475 1.118 0.9163 0.3047 

1967 2.364 2.288 2.037 1.66 1.423 0.485 

1968 4.303 4.182 3.689 2.875 2.368 0.7615 

1969 2.769 2.679 2.335 1.788 1.472 0.4864 

1970 0.8066 0.78 0.7093 0.5829 0.49 0.1699 

1971 3.608 3.491 3.162 2.414 1.979 0.6643 

1972 0.6588 0.6369 0.5715 0.4905 0.4281 0.1554 

1973 4.186 4.096 3.601 2.736 2.296 0.7445 

1974 5.703 5.517 4.944 3.752 3.078 0.9968 

1975 1.366 1.322 1.208 0.989 0.8202 0.2846 

1976 1.174 1.135 1.034 0.8416 0.7104 0.2495 

1977 4.959 4.796 4.235 3.295 2.715 0.8652 

1978 1.646 1.592 1.441 1.165 0.9667 0.3275 

1979 4.463 4.34 3.864 3.105 2.581 0.8337 

1980 7.42 7.262 6.418 4.834 3.951 1.255 

1981 1.233 1.192 1.056 0.8298 0.7024 0.2462 

1982 3.815 3.69 3.263 2.453 2.007 0.6474 

1983 7.495 7.333 6.55 4.987 4.1 1.328 

1984 2.106 2.038 1.942 1.622 1.354 0.4543 

1985 1.108 1.075 0.9724 0.8628 0.7257 0.2449 

1986 0.5363 0.5188 0.4679 0.3896 0.3452 0.1208 

1987 0.5477 0.5309 0.4871 0.4519 0.3955 0.1341 

1988 6.02 5.823 5.13 4.183 3.469 1.109 

1989 1.454 1.413 1.235 1.137 0.9756 0.3429 

1990 1.154 1.116 1.01 0.798 0.6801 0.2408 

Sorted results 

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

0.032258064516129 7.73 7.565 6.644 5.194 4.295 1.369 

0.0645161290322581 7.495 7.333 6.55 4.987 4.1 1.328 

0.0967741935483871 7.42 7.262 6.418 4.834 3.951 1.255 

0.129032258064516 6.093 5.891 5.395 4.183 3.469 1.109 

0.161290322580645 6.02 5.823 5.13 4.105 3.364 1.066 

0.193548387096774 5.703 5.517 4.944 3.752 3.078 0.9968 

0.225806451612903 4.959 4.796 4.235 3.295 2.715 0.8652 

0.258064516129032 4.463 4.34 3.864 3.105 2.581 0.8337 

0.290322580645161 4.303 4.182 3.689 2.875 2.368 0.7615 

0.32258064516129 4.186 4.096 3.601 2.736 2.296 0.7445 

0.354838709677419 3.815 3.69 3.263 2.453 2.007 0.6643 

0.387096774193548 3.608 3.491 3.162 2.414 1.979 0.6474 

0.419354838709677 2.769 2.679 2.335 1.788 1.472 0.4864 

0.451612903225806 2.364 2.288 2.037 1.66 1.423 0.485 

0.483870967741936 2.106 2.038 1.942 1.622 1.354 0.4543 

0.516129032258065 1.692 1.642 1.475 1.165 0.9756 0.3429 

0.548387096774194 1.646 1.592 1.441 1.137 0.9667 0.3275 

0.580645161290323 1.454 1.413 1.235 1.118 0.9163 0.3047 

0.612903225806452 1.366 1.322 1.208 0.989 0.8202 0.2846 

0.645161290322581 1.329 1.286 1.153 0.909 0.7654 0.2819 

0.67741935483871 1.233 1.192 1.056 0.8628 0.7257 0.2495 

0.709677419354839 1.174 1.135 1.034 0.8416 0.7104 0.2462 

0.741935483870968 1.154 1.116 1.01 0.8298 0.7024 0.2449 

0.774193548387097 1.108 1.075 0.9724 0.798 0.6801 0.2408 

0.806451612903226 0.9493 0.9185 0.8034 0.6938 0.5884 0.1981 

0.838709677419355 0.8066 0.78 0.7093 0.5829 0.49 0.1699 

0.870967741935484 0.6998 0.6769 0.5904 0.4905 0.4281 0.1554 

0.903225806451613 0.6588 0.6369 0.5715 0.4519 0.3955 0.1441 

0.935483870967742 0.5477 0.5309 0.4871 0.4479 0.3872 0.1341 

0.967741935483871 0.5363 0.5188 0.4679 0.3896 0.3452 0.1208 

0.1 7.2873 7.1249 6.3157 4.7689 3.9028 1.2404 

 Average of yearly averages: 0.550383333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 2MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 
39

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 1-4 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant, Ground, 1 application 

stored as 3MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 1.268 1.227 1.073 0.9368 0.797 0.2665 

1962 11.26 11.02 9.682 7.564 6.256 1.993 

1963 1.845 1.784 1.603 1.268 1.069 0.3901 

1964 8.839 8.547 7.83 5.96 4.884 1.547 

1965 0.9026 0.873 0.7615 0.578 0.4908 0.1868 

1966 2.383 2.312 2.08 1.576 1.292 0.4233 

1967 3.395 3.287 2.924 2.368 2.034 0.6892 

1968 6.204 6.031 5.313 4.145 3.414 1.097 

1969 3.962 3.832 3.34 2.555 2.104 0.6911 

1970 1.075 1.039 0.9351 0.7768 0.6458 0.2249 

1971 5.209 5.039 4.569 3.488 2.86 0.9535 

1972 0.8784 0.8493 0.7591 0.6467 0.551 0.2036 

1973 6.052 5.922 5.207 3.945 3.311 1.072 

1974 8.278 8.008 7.179 5.45 4.47 1.444 

1975 1.888 1.827 1.666 1.371 1.138 0.3936 

1976 1.645 1.591 1.452 1.173 0.9921 0.342 

1977 7.162 6.926 6.117 4.759 3.922 1.25 

1978 2.309 2.234 2.026 1.635 1.357 0.4571 

1979 6.449 6.271 5.574 4.482 3.725 1.203 

1980 10.81 10.58 9.35 7.044 5.756 1.824 

1981 1.669 1.614 1.426 1.126 0.9555 0.3375 

1982 5.512 5.332 4.716 3.545 2.901 0.9291 

1983 10.91 10.67 9.536 7.259 5.965 1.932 

1984 2.965 2.869 2.733 2.294 1.916 0.6439 

1985 1.531 1.482 1.343 1.18 0.9947 0.3353 

1986 0.661 0.6395 0.5804 0.4925 0.4284 0.1525 

1987 0.7218 0.6984 0.6397 0.5693 0.5025 0.172 

1988 8.72 8.436 7.433 6.07 5.034 1.609 

1989 2.054 1.996 1.745 1.589 1.367 0.4797 

1990 1.6 1.548 1.403 1.113 0.9367 0.3293 

Sorted results 
40

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

0.032258064516129 11.26 11.02 9.682 7.564 6.256 1.993 

0.0645161290322581 10.91 10.67 9.536 7.259 5.965 1.932 

0.0967741935483871 10.81 10.58 9.35 7.044 5.756 1.824 

0.129032258064516 8.839 8.547 7.83 6.07 5.034 1.609 

0.161290322580645 8.72 8.436 7.433 5.96 4.884 1.547 

0.193548387096774 8.278 8.008 7.179 5.45 4.47 1.444 

0.225806451612903 7.162 6.926 6.117 4.759 3.922 1.25 

0.258064516129032 6.449 6.271 5.574 4.482 3.725 1.203 

0.290322580645161 6.204 6.031 5.313 4.145 3.414 1.097 

0.32258064516129 6.052 5.922 5.207 3.945 3.311 1.072 

0.354838709677419 5.512 5.332 4.716 3.545 2.901 0.9535 

0.387096774193548 5.209 5.039 4.569 3.488 2.86 0.9291 

0.419354838709677 3.962 3.832 3.34 2.555 2.104 0.6911 

0.451612903225806 3.395 3.287 2.924 2.368 2.034 0.6892 

0.483870967741936 2.965 2.869 2.733 2.294 1.916 0.6439 

0.516129032258065 2.383 2.312 2.08 1.635 1.367 0.4797 

0.548387096774194 2.309 2.234 2.026 1.589 1.357 0.4571 

0.580645161290323 2.054 1.996 1.745 1.576 1.292 0.4233 

0.612903225806452 1.888 1.827 1.666 1.371 1.138 0.3936 

0.645161290322581 1.845 1.784 1.603 1.268 1.069 0.3901 

0.67741935483871 1.669 1.614 1.452 1.18 0.9947 0.342 

0.709677419354839 1.645 1.591 1.426 1.173 0.9921 0.3375 

0.741935483870968 1.6 1.548 1.403 1.126 0.9555 0.3353 

0.774193548387097 1.531 1.482 1.343 1.113 0.9367 0.3293 

0.806451612903226 1.268 1.227 1.073 0.9368 0.797 0.2665 

0.838709677419355 1.075 1.039 0.9351 0.7768 0.6458 0.2249 

0.870967741935484 0.9026 0.873 0.7615 0.6467 0.551 0.2036 

0.903225806451613 0.8784 0.8493 0.7591 0.578 0.5025 0.1868 

0.935483870967742 0.7218 0.6984 0.6397 0.5693 0.4908 0.172 

0.967741935483871 0.661 0.6395 0.5804 0.4925 0.4284 0.1525 

0.1 10.6129 10.3767 9.198 6.9466 5.6838 1.8025 

 Average of yearly averages: 0.785733333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 3MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 1-4 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Preplant, Ground, 2 applications 
41

stored as 4MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 2.878 2.782 2.419 1.809 1.613 0.5671 

1962 11.28 11.04 10.33 8.665 7.301 2.368 

1963 5.169 4.998 4.501 3.577 3.032 1.043 

1964 9.904 9.58 8.56 7.569 6.375 2.077 

1965 1.168 1.129 0.993 0.7888 0.6849 0.2692 

1966 6.732 6.533 5.922 4.494 3.685 1.184 

1967 8.336 8.074 7.078 5.448 4.48 1.554 

1968 7.371 7.198 6.35 5.568 4.798 1.613 

1969 19.56 18.92 16.5 12.38 10.12 3.247 

1970 2.78 2.687 2.477 2.031 1.714 0.6281 

1971 13.23 12.8 11.67 8.92 7.317 2.369 

1972 2.168 2.096 1.868 1.576 1.327 0.4833 

1973 21.55 21.01 18.58 13.94 11.38 3.647 

1974 11.36 11 9.602 7.809 6.535 2.179 

1975 5.05 4.941 4.518 3.398 2.887 1.024 

1976 3.413 3.3 3.012 2.438 2.061 0.7074 

1977 10.45 10.18 9.038 7.284 6.229 2.059 

1978 5.132 4.964 4.741 3.755 3.126 1.052 

1979 8.065 7.803 7.408 6.385 5.57 1.888 

1980 14.71 14.24 12.57 10.52 8.807 2.848 

1981 1.805 1.766 1.566 1.454 1.354 0.5184 

1982 11.32 10.95 9.688 7.282 5.959 1.897 

1983 10.94 10.71 9.772 8.17 7.044 2.384 

1984 5.225 5.056 4.651 3.754 3.277 1.133 

1985 3.382 3.276 2.935 2.223 1.916 0.6673 

1986 1.319 1.275 1.196 0.9711 0.893 0.3313 

1987 2.142 2.069 1.859 1.42 1.204 0.4304 

1988 11.45 11.08 9.658 8.191 7.011 2.323 

1989 6.989 6.832 6.023 4.55 3.723 1.34 

1990 6.461 6.251 5.802 4.762 3.94 1.317 

Sorted results 

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

0.032258064516129 21.55 21.01 18.58 13.94 11.38 3.647 

0.0645161290322581 19.56 18.92 16.5 12.38 10.12 3.247 

0.0967741935483871 14.71 14.24 12.57 10.52 8.807 2.848 

0.129032258064516 13.23 12.8 11.67 8.92 7.317 2.384 

0.161290322580645 11.45 11.08 10.33 8.665 7.301 2.369 

0.193548387096774 11.36 11.04 9.772 8.191 7.044 2.368 

0.225806451612903 11.32 11 9.688 8.17 7.011 2.323 

0.258064516129032 11.28 10.95 9.658 7.809 6.535 2.179 

0.290322580645161 10.94 10.71 9.602 7.569 6.375 2.077 

0.32258064516129 10.45 10.18 9.038 7.284 6.229 2.059 

0.354838709677419 9.904 9.58 8.56 7.282 5.959 1.897 

0.387096774193548 8.336 8.074 7.408 6.385 5.57 1.888 

0.419354838709677 8.065 7.803 7.078 5.568 4.798 1.613 

0.451612903225806 7.371 7.198 6.35 5.448 4.48 1.554 

0.483870967741936 6.989 6.832 6.023 4.762 3.94 1.34 

0.516129032258065 6.732 6.533 5.922 4.55 3.723 1.317 

0.548387096774194 6.461 6.251 5.802 4.494 3.685 1.184 

0.580645161290323 5.225 5.056 4.741 3.755 3.277 1.133 

0.612903225806452 5.169 4.998 4.651 3.754 3.126 1.052 

0.645161290322581 5.132 4.964 4.518 3.577 3.032 1.043 

0.67741935483871 5.05 4.941 4.501 3.398 2.887 1.024 

0.709677419354839 3.413 3.3 3.012 2.438 2.061 0.7074 

0.741935483870968 3.382 3.276 2.935 2.223 1.916 0.6673 

0.774193548387097 2.878 2.782 2.477 2.031 1.714 0.6281 

0.806451612903226 2.78 2.687 2.419 1.809 1.613 0.5671 

0.838709677419355 2.168 2.096 1.868 1.576 1.354 0.5184 

0.870967741935484 2.142 2.069 1.859 1.454 1.327 0.4833 

0.903225806451613 1.805 1.766 1.566 1.42 1.204 0.4304 

0.935483870967742 1.319 1.275 1.196 0.9711 0.893 0.3313 

0.967741935483871 1.168 1.129 0.993 0.7888 0.6849 0.2692 
42

0.1 14.562 14.096 12.48 10.36 8.658 2.8016 

 Average of yearly averages: 1.50495 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 4MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 1-4 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 0.1249 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) 

Post Plant, Ground, 1 application 

stored as 5MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 0.3472 0.3355 0.3029 0.2661 0.237 0.07943 

1962 0.7181 0.6954 0.6232 0.4701 0.399 0.1356 

1963 2.599 2.508 2.334 1.973 1.638 0.5358 

1964 1.068 1.031 0.8911 0.6768 0.5575 0.2128 

1965 0.3727 0.36 0.3349 0.2932 0.2517 0.08894 

1966 6.225 6.056 5.436 4.057 3.307 1.039 

1967 4.045 3.911 3.45 2.592 2.126 0.7168 

1968 2.794 2.701 2.344 1.874 1.551 0.5146 

1969 0.6398 0.6175 0.534 0.4572 0.3997 0.1582 

1970 1.067 1.039 0.9048 0.6768 0.5537 0.1898 

1971 0.6236 0.602 0.5269 0.4115 0.3647 0.1294 

1972 0.9132 0.8815 0.7623 0.5715 0.4704 0.1691 

1973 1.825 1.791 1.606 1.191 0.97 0.315 

1974 1.422 1.373 1.191 0.8822 0.7358 0.2562 

1975 2.998 2.898 2.564 2.019 1.666 0.5369 

1976 4.872 4.705 4.347 3.269 2.672 0.8569 

1977 1.818 1.753 1.513 1.274 1.087 0.3954 

1978 3.167 3.061 2.722 2.048 1.675 0.5402 

1979 2.91 2.81 2.434 1.883 1.556 0.5213 

1980 6.979 6.766 6.112 4.563 3.716 1.172 

1981 5.969 5.77 5.181 3.876 3.158 1.022 
43

1982 3.417 3.297 2.871 2.129 1.733 0.5908 

1983 7.666 7.465 6.746 5.156 4.221 1.347 

1984 1.722 1.665 1.526 1.233 1.03 0.3739 

1985 0.7511 0.7251 0.6337 0.5313 0.443 0.1719 

1986 3.458 3.372 3.036 2.399 1.971 0.6266 

1987 3.274 3.177 2.817 2.082 1.694 0.5659 

1988 0.9971 0.962 0.8304 0.6475 0.5422 0.2248 

1989 8.514 8.24 7.225 5.464 4.472 1.417 

1990 1.317 1.272 1.114 0.862 0.7158 0.2797 

Sorted results 

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

0.032258064516129 8.514 8.24 7.225 5.464 4.472 1.417 

0.0645161290322581 7.666 7.465 6.746 5.156 4.221 1.347 

0.0967741935483871 6.979 6.766 6.112 4.563 3.716 1.172 

0.129032258064516 6.225 6.056 5.436 4.057 3.307 1.039 

0.161290322580645 5.969 5.77 5.181 3.876 3.158 1.022 

0.193548387096774 4.872 4.705 4.347 3.269 2.672 0.8569 

0.225806451612903 4.045 3.911 3.45 2.592 2.126 0.7168 

0.258064516129032 3.458 3.372 3.036 2.399 1.971 0.6266 

0.290322580645161 3.417 3.297 2.871 2.129 1.733 0.5908 

0.32258064516129 3.274 3.177 2.817 2.082 1.694 0.5659 

0.354838709677419 3.167 3.061 2.722 2.048 1.675 0.5402 

0.387096774193548 2.998 2.898 2.564 2.019 1.666 0.5369 

0.419354838709677 2.91 2.81 2.434 1.973 1.638 0.5358 

0.451612903225806 2.794 2.701 2.344 1.883 1.556 0.5213 

0.483870967741936 2.599 2.508 2.334 1.874 1.551 0.5146 

0.516129032258065 1.825 1.791 1.606 1.274 1.087 0.3954 

0.548387096774194 1.818 1.753 1.526 1.233 1.03 0.3739 

0.580645161290323 1.722 1.665 1.513 1.191 0.97 0.315 

0.612903225806452 1.422 1.373 1.191 0.8822 0.7358 0.2797 

0.645161290322581 1.317 1.272 1.114 0.862 0.7158 0.2562 

0.67741935483871 1.068 1.039 0.9048 0.6768 0.5575 0.2248 

0.709677419354839 1.067 1.031 0.8911 0.6768 0.5537 0.2128 

0.741935483870968 0.9971 0.962 0.8304 0.6475 0.5422 0.1898 

0.774193548387097 0.9132 0.8815 0.7623 0.5715 0.4704 0.1719 

0.806451612903226 0.7511 0.7251 0.6337 0.5313 0.443 0.1691 

0.838709677419355 0.7181 0.6954 0.6232 0.4701 0.3997 0.1582 

0.870967741935484 0.6398 0.6175 0.534 0.4572 0.399 0.1356 

0.903225806451613 0.6236 0.602 0.5269 0.4115 0.3647 0.1294 

0.935483870967742 0.3727 0.36 0.3349 0.2932 0.2517 0.08894 

0.967741935483871 0.3472 0.3355 0.3029 0.2661 0.237 0.07943 

0.1 6.9036 6.695 6.0444 4.5124 3.6751 1.1587 

 Average of yearly averages: 0.506099 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 5MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 
44

Application Date Date 15-5 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Post Plant, Ground, 2 applications 

stored as 6MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 1.008 0.9733 0.8561 0.688 0.5945 0.2036 

1962 1.51 1.463 1.311 0.9898 0.8211 0.2776 

1963 5.463 5.273 4.865 4.135 3.435 1.116 

1964 2.606 2.516 2.176 1.664 1.372 0.5005 

1965 0.8865 0.8561 0.8164 0.6852 0.5819 0.2151 

1966 6.23 6.061 5.58 4.284 3.536 1.137 

1967 5.878 5.675 4.915 4.095 3.49 1.189 

1968 2.964 2.865 2.573 2.046 1.723 0.6041 

1969 1.405 1.356 1.172 1.013 0.8797 0.3234 

1970 2.217 2.158 1.88 1.406 1.151 0.3853 

1971 1.961 1.893 1.669 1.328 1.102 0.3842 

1972 1.865 1.8 1.557 1.168 0.9626 0.3442 

1973 2.043 1.977 1.797 1.366 1.131 0.3869 

1974 6.97 6.732 5.836 4.324 3.533 1.141 

1975 3.106 3.007 2.867 2.553 2.162 0.7457 

1976 6.943 6.706 5.813 4.585 3.803 1.232 

1977 3.743 3.61 3.115 2.628 2.243 0.7887 

1978 4.323 4.177 3.614 2.934 2.507 0.8494 

1979 8.434 8.144 7.053 5.492 4.549 1.48 

1980 7.021 6.807 6.252 5.058 4.295 1.442 

1981 9.498 9.166 7.933 6.43 5.515 1.844 

1982 7.422 7.163 6.238 4.626 3.767 1.27 

1983 7.696 7.494 6.866 5.367 4.422 1.45 

1984 3.15 3.072 2.681 2.103 1.908 0.7058 

1985 1.752 1.691 1.478 1.256 1.05 0.394 

1986 15.28 14.76 13.24 9.879 8.058 2.617 

1987 9.409 9.102 8.094 5.989 4.873 1.637 

1988 2.263 2.184 1.885 1.48 1.244 0.5206 

1989 8.998 8.692 8.008 6.995 5.867 1.911 

1990 3.656 3.531 3.052 2.401 1.99 0.7114 

Sorted results 

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

0.032258064516129 15.28 14.76 13.24 9.879 8.058 2.617 

0.0645161290322581 9.498 9.166 8.094 6.995 5.867 1.911 

0.0967741935483871 9.409 9.102 8.008 6.43 5.515 1.844 

0.129032258064516 8.998 8.692 7.933 5.989 4.873 1.637 

0.161290322580645 8.434 8.144 7.053 5.492 4.549 1.48 

0.193548387096774 7.696 7.494 6.866 5.367 4.422 1.45 

0.225806451612903 7.422 7.163 6.252 5.058 4.295 1.442 

0.258064516129032 7.021 6.807 6.238 4.626 3.803 1.27 

0.290322580645161 6.97 6.732 5.836 4.585 3.767 1.232 

0.32258064516129 6.943 6.706 5.813 4.324 3.536 1.189 

0.354838709677419 6.23 6.061 5.58 4.284 3.533 1.141 

0.387096774193548 5.878 5.675 4.915 4.135 3.49 1.137 

0.419354838709677 5.463 5.273 4.865 4.095 3.435 1.116 

0.451612903225806 4.323 4.177 3.614 2.934 2.507 0.8494 

0.483870967741936 3.743 3.61 3.115 2.628 2.243 0.7887 

0.516129032258065 3.656 3.531 3.052 2.553 2.162 0.7457 

0.548387096774194 3.15 3.072 2.867 2.401 1.99 0.7114 

0.580645161290323 3.106 3.007 2.681 2.103 1.908 0.7058 

0.612903225806452 2.964 2.865 2.573 2.046 1.723 0.6041 
45

0.645161290322581 2.606 2.516 2.176 1.664 1.372 0.5206 

0.67741935483871 2.263 2.184 1.885 1.48 1.244 0.5005 

0.709677419354839 2.217 2.158 1.88 1.406 1.151 0.394 

0.741935483870968 2.043 1.977 1.797 1.366 1.131 0.3869 

0.774193548387097 1.961 1.893 1.669 1.328 1.102 0.3853 

0.806451612903226 1.865 1.8 1.557 1.256 1.05 0.3842 

0.838709677419355 1.752 1.691 1.478 1.168 0.9626 0.3442 

0.870967741935484 1.51 1.463 1.311 1.013 0.8797 0.3234 

0.903225806451613 1.405 1.356 1.172 0.9898 0.8211 0.2776 

0.935483870967742 1.008 0.9733 0.8561 0.688 0.5945 0.2151 

0.967741935483871 0.8865 0.8561 0.8164 0.6852 0.5819 0.2036 

0.1 9.3679 9.061 8.0005 6.3859 5.4508 1.8233 

 Average of yearly averages: 0.926883333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 6MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 15-5 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 0.1249 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) 

Fall, Ground 

stored as 7MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 5.718 5.624 5.089 3.843 2.612 0.6441 

1962 2.828 2.743 2.422 1.859 1.548 0.6225 

1963 2.334 2.259 2.012 1.239 0.88 0.2896 

1964 2.16 2.091 1.87 1.367 0.9978 0.4964 

1965 1.284 1.245 1.097 0.8414 0.7014 0.3365 

1966 0.9364 0.9069 0.8489 0.7199 0.5813 0.2326 

1967 3.154 3.099 2.809 2.408 1.888 0.5537 

1968 2.076 2.02 1.804 1.379 0.9767 0.4791 

1969 2.287 2.217 1.996 1.765 1.435 0.5212 

1970 7.595 7.346 6.522 5.07 3.843 1.236 
46

1971 2.526 2.451 2.166 1.672 1.398 0.7355 

1972 2.987 2.889 2.621 2.117 1.589 0.6711 

1973 1.929 1.868 1.669 1.429 1.137 0.4903 

1974 2.249 2.176 1.899 1.508 1.181 0.4411 

1975 14.6 14.12 12.33 9.454 7.274 1.932 

1976 4.439 4.309 3.813 2.944 2.458 0.9369 

1977 2.989 2.893 2.621 2.211 1.527 0.4566 

1978 1.557 1.509 1.425 0.9888 0.8264 0.4461 

1979 2.498 2.454 2.188 1.815 1.29 0.511 

1980 3.033 2.935 2.749 2.153 1.659 0.6583 

1981 5.673 5.487 4.792 3.653 2.667 0.8551 

1982 1.986 1.927 1.702 1.312 1.095 0.5226 

1983 2.682 2.616 2.355 1.92 1.5 0.5214 

1984 7.906 7.727 6.773 5.147 3.907 1.229 

1985 2.565 2.49 2.205 1.707 1.428 0.7155 

1986 3.7 3.582 3.251 2.586 1.924 0.5935 

1987 3.51 3.398 3.067 2.062 1.433 0.6444 

1988 2.865 2.787 2.521 1.99 1.518 0.7033 

1989 5.738 5.554 4.967 3.657 2.494 0.7997 

1990 2.56 2.482 2.188 1.677 1.395 0.7017 

Sorted results 

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

0.032258064516129 14.6 14.12 12.33 9.454 7.274 1.932 

0.0645161290322581 7.906 7.727 6.773 5.147 3.907 1.236 

0.0967741935483871 7.595 7.346 6.522 5.07 3.843 1.229 

0.129032258064516 5.738 5.624 5.089 3.843 2.667 0.9369 

0.161290322580645 5.718 5.554 4.967 3.657 2.612 0.8551 

0.193548387096774 5.673 5.487 4.792 3.653 2.494 0.7997 

0.225806451612903 4.439 4.309 3.813 2.944 2.458 0.7355 

0.258064516129032 3.7 3.582 3.251 2.586 1.924 0.7155 

0.290322580645161 3.51 3.398 3.067 2.408 1.888 0.7033 

0.32258064516129 3.154 3.099 2.809 2.211 1.659 0.7017 

0.354838709677419 3.033 2.935 2.749 2.153 1.589 0.6711 

0.387096774193548 2.989 2.893 2.621 2.117 1.548 0.6583 

0.419354838709677 2.987 2.889 2.621 2.062 1.527 0.6444 

0.451612903225806 2.865 2.787 2.521 1.99 1.518 0.6441 

0.483870967741936 2.828 2.743 2.422 1.92 1.5 0.6225 

0.516129032258065 2.682 2.616 2.355 1.859 1.435 0.5935 

0.548387096774194 2.565 2.49 2.205 1.815 1.433 0.5537 

0.580645161290323 2.56 2.482 2.188 1.765 1.428 0.5226 

0.612903225806452 2.526 2.454 2.188 1.707 1.398 0.5214 

0.645161290322581 2.498 2.451 2.166 1.677 1.395 0.5212 

0.67741935483871 2.334 2.259 2.012 1.672 1.29 0.511 

0.709677419354839 2.287 2.217 1.996 1.508 1.181 0.4964 

0.741935483870968 2.249 2.176 1.899 1.429 1.137 0.4903 

0.774193548387097 2.16 2.091 1.87 1.379 1.095 0.4791 

0.806451612903226 2.076 2.02 1.804 1.367 0.9978 0.4566 

0.838709677419355 1.986 1.927 1.702 1.312 0.9767 0.4461 

0.870967741935484 1.929 1.868 1.669 1.239 0.88 0.4411 

0.903225806451613 1.557 1.509 1.425 0.9888 0.8264 0.3365 

0.935483870967742 1.284 1.245 1.097 0.8414 0.7014 0.2896 

0.967741935483871 0.9364 0.9069 0.8489 0.7199 0.5813 0.2326 

0.1 7.4093 7.1738 6.3787 4.9473 3.7254 1.19979 

 Average of yearly averages: 0.665893333333334 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 7MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 
47

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.1249 kg/ha 

Application Efficiency: APPEFF 0.99 fraction 

Spray Drift DRFT 0.064 fraction of application rate applied to pond 

Application Date Date 15-10 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

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

Fall, Aerial 

stored as 8MScot.out 

Chemical: pyroxasulfone 

PRZM environment: MScottonSTD.txt modified Tueday, 29 May 2007 at 12:57:52 

EXAMS environment: ir298.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 3.944 3.879 3.508 2.657 1.824 0.4497 

1962 1.949 1.891 1.669 1.282 1.067 0.4407 

1963 1.635 1.583 1.409 0.8909 0.6487 0.2149 

1964 1.517 1.469 1.313 0.9778 0.7289 0.3552 

1965 0.9015 0.8742 0.7703 0.5911 0.4928 0.2467 

1966 0.695 0.6732 0.6337 0.5527 0.4465 0.1763 

1967 2.223 2.183 1.994 1.701 1.333 0.3943 

1968 1.479 1.439 1.286 0.9863 0.7147 0.3436 

1969 1.597 1.548 1.406 1.248 1.026 0.3721 

1970 5.25 5.079 4.507 3.502 2.659 0.857 

1971 1.744 1.693 1.508 1.154 0.9653 0.5173 

1972 2.121 2.051 1.858 1.496 1.13 0.4735 

1973 1.384 1.34 1.2 1.035 0.8227 0.3511 

1974 1.631 1.578 1.377 1.09 0.8533 0.3175 

1975 10.01 9.678 8.453 6.479 4.985 1.329 

1976 3.042 2.953 2.613 2.017 1.684 0.654 

1977 2.103 2.036 1.842 1.55 1.088 0.3283 

1978 1.1 1.066 1.01 0.7043 0.5777 0.3212 

1979 1.751 1.721 1.533 1.282 0.9273 0.3652 

1980 2.158 2.088 1.95 1.525 1.178 0.4652 

1981 3.938 3.809 3.326 2.535 1.861 0.5986 

1982 1.378 1.337 1.181 0.9105 0.7601 0.3729 

1983 1.876 1.83 1.649 1.363 1.069 0.3722 

1984 5.456 5.333 4.675 3.552 2.702 0.8519 

1985 1.77 1.718 1.522 1.178 0.9854 0.5037 

1986 2.582 2.5 2.27 1.813 1.357 0.4211 

1987 2.444 2.367 2.135 1.45 1.024 0.4557 

1988 2.04 1.985 1.793 1.413 1.082 0.4956 

1989 3.963 3.836 3.43 2.531 1.744 0.5608 

1990 1.767 1.714 1.51 1.158 0.9631 0.4945 

Sorted results 

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

0.032258064516129 10.01 9.678 8.453 6.479 4.985 1.329 

0.0645161290322581 5.456 5.333 4.675 3.552 2.702 0.857 

0.0967741935483871 5.25 5.079 4.507 3.502 2.659 0.8519 

0.129032258064516 3.963 3.879 3.508 2.657 1.861 0.654 

0.161290322580645 3.944 3.836 3.43 2.535 1.824 0.5986 
48

0.193548387096774 3.938 3.809 3.326 2.531 1.744 0.5608 

0.225806451612903 3.042 2.953 2.613 2.017 1.684 0.5173 

0.258064516129032 2.582 2.5 2.27 1.813 1.357 0.5037 

0.290322580645161 2.444 2.367 2.135 1.701 1.333 0.4956 

0.32258064516129 2.223 2.183 1.994 1.55 1.178 0.4945 

0.354838709677419 2.158 2.088 1.95 1.525 1.13 0.4735 

0.387096774193548 2.121 2.051 1.858 1.496 1.088 0.4652 

0.419354838709677 2.103 2.036 1.842 1.45 1.082 0.4557 

0.451612903225806 2.04 1.985 1.793 1.413 1.069 0.4497 

0.483870967741936 1.949 1.891 1.669 1.363 1.067 0.4407 

0.516129032258065 1.876 1.83 1.649 1.282 1.026 0.4211 

0.548387096774194 1.77 1.721 1.533 1.282 1.024 0.3943 

0.580645161290323 1.767 1.718 1.522 1.248 0.9854 0.3729 

0.612903225806452 1.751 1.714 1.51 1.178 0.9653 0.3722 

0.645161290322581 1.744 1.693 1.508 1.158 0.9631 0.3721 

0.67741935483871 1.635 1.583 1.409 1.154 0.9273 0.3652 

0.709677419354839 1.631 1.578 1.406 1.09 0.8533 0.3552 

0.741935483870968 1.597 1.548 1.377 1.035 0.8227 0.3511 

0.774193548387097 1.517 1.469 1.313 0.9863 0.7601 0.3436 

0.806451612903226 1.479 1.439 1.286 0.9778 0.7289 0.3283 

0.838709677419355 1.384 1.34 1.2 0.9105 0.7147 0.3212 

0.870967741935484 1.378 1.337 1.181 0.8909 0.6487 0.3175 

0.903225806451613 1.1 1.066 1.01 0.7043 0.5777 0.2467 

0.935483870967742 0.9015 0.8742 0.7703 0.5911 0.4928 0.2149 

0.967741935483871 0.695 0.6732 0.6337 0.5527 0.4465 0.1763 

0.1 5.1213 4.959 4.4071 3.4175 2.5792 0.83211 

 Average of yearly averages: 0.469993333333333 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: 8MScot 

Metfile: w03940.dvf 

PRZM scenario: MScottonSTD.txt 

EXAMS environment file: ir298.exv 

Chemical Name: pyroxasulfone 

Description Variable Name Value Units Comments 

Molecular weight mwt 367 g/mol 

Henry's Law Const. henry 2.65E-9 atm-m^3/mol 

Vapor Pressure vapr 1.8E-8 torr 

Solubility sol 3.49 mg/L 

Kd Kd mg/L 

Koc Koc 94.75 mg/L 

Photolysis half-life kdp days Half-life 

Aerobic Aquatic Metabolism kbacw 270 days Halfife 

Anaerobic Aquatic Metabolism kbacs 157 days Halfife 

Aerobic Soil Metabolism asm 1055 days Halfife 

Hydrolysis: pH 7 days Half-life 

Method: CAM 2 integer See PRZM manual 

Incorporation Depth: DEPI cm 

Application Rate: TAPP 0.0883 kg/ha 

Application Efficiency: APPEFF 0.95 fraction 

Spray Drift DRFT 0.094 fraction of application rate applied to pond 

Application Date Date 15-10 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 1 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 0.5 

Flag for Index Res. Run IR Reservoir 

Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run) 
49

SCI-GROW 

 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:pyroxasulfone 

 time is 1/17/2013 16:33: 2 

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

 Application Number of Total Use Koc Soil Aerobic 

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

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

 0.112 2.0 0.223 9.48E+01 1055.0 

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

 groundwater screening cond (ppb) = 6.24E+00 

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

PRZM-GW 

FL CITUS SCENARIO 

FL POTATO SCENARIO 

GA SCENARIO 
50

NC SCENARIO 

MD SCENARIO 
51

WI SCENARIO