Appendix C – Aquatic Exposure Modeling 

Sample Runs 
Figure C-1. pe5 run for Florida Strawberry – Drip Irrigation Scenario. 

stored as FLSt_C.out 

Chemical: DMDS 

PRZM environment: FLstrawberry_WirrigSTD.txt modified Tueday, 26 August 

2008 at 06:16:38 

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

06:14:08 

Metfile: w12842.dvf modified Tueday, 26 August 2008 at 06:14:20 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.005025 0.002831 0.0009906 0.0003479 0.000232 5.722e-005 

1962 0.01868 0.01077 0.004964 0.00185 0.001234 0.0003043 

1963 0.01051 0.006424 0.00188 0.0006844 0.0004564 0.0001127 

1964 0.4184 0.2731 0.07478 0.02622 0.01749 0.004301 

1965 0.576 0.3222 0.08445 0.02968 0.0198 0.004884 

1966 0.0314 0.01927 0.00546 0.001925 0.001284 0.0003185 

1967 0.02562 0.01469 0.003905 0.00138 0.0009203 0.0002271 

1968 0.01969 0.01145 0.003288 0.001157 0.0007716 0.0001899 

1969 0.01232 0.007263 0.002698 0.0009616 0.0006413 0.0001583 

1970 0.01826 0.0113 0.003639 0.001283 0.0008556 0.0002111 

1971 0.2604 0.1504 0.08145 0.02878 0.0192 0.004734 

1972 0.0002063 0.0001202 4.488e-005 1.708e-005 1.149e-005 4.631e-006 

1973 1.2 0.8514 0.2697 0.09471 0.06316 0.01558 

1974 0.08809 0.06454 0.01902 0.006669 0.004448 0.001103 

1975 1.504 0.8688 0.2431 0.08536 0.05693 0.01404 

1976 0.1362 0.08344 0.03079 0.01092 0.007283 0.001797 

1977 0.4018 0.2458 0.07346 0.02594 0.0173 0.004268 

1978 0.2982 0.1792 0.059 0.02078 0.01386 0.003419 

1979 0.1048 0.05881 0.02468 0.008763 0.005844 0.001443 

1980 0.5931 0.3821 0.1144 0.04019 0.0268 0.006593 

1981 0.00722 0.004817 0.002224 0.0007965 0.0005313 0.000134 

1982 0.07884 0.05044 0.01525 0.005424 0.003617 0.0008921 

1983 2.226 1.697 0.5357 0.1883 0.1256 0.03098 

1984 0.0865 0.04963 0.01319 0.004632 0.003089 0.0007725 

1985 5.527 3.734 1.173 0.4118 0.2746 0.06772 

1986 2.507 1.529 0.4418 0.1553 0.1035 0.02556 

1987 0.1516 0.1108 0.03986 0.01402 0.009351 0.002317 

1988 2.375 1.389 0.5564 0.1956 0.1304 0.03208 

1989 2.163 1.561 0.5147 0.1809 0.1206 0.02976 

1990 0.7965 0.4737 0.1269 0.0445 0.02968 0.007331 

Sorted results 

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

0.032258064516129 5.527 3.734 1.173 0.4118 0.2746 0.06772 

0.0645161290322581 2.507 1.697 0.5564 0.1956 0.1304

 0.03208 

0.0967741935483871 2.375 1.561 0.5357 0.1883 0.1256

 0.03098 

0.129032258064516 2.226 1.529 0.5147 0.1809 0.1206 0.02976 

0.161290322580645 2.163 1.389 0.4418 0.1553 0.1035 0.02556 

0.193548387096774 1.504 0.8688 0.2697 0.09471 0.06316

 0.01558 

0.225806451612903 1.2 0.8514 0.2431 0.08536 0.05693

 0.01404 
0.258064516129032 0.7965 0.4737 0.1269 0.0445 0.02968

 0.007331 

0.290322580645161 0.5931 0.3821 0.1144 0.04019 0.0268

 0.006593 

0.32258064516129 0.576 0.3222 0.08445 0.02968 0.0198

 0.004884 

0.354838709677419 0.4184 0.2731 0.08145 0.02878 0.0192

 0.004734 

0.387096774193548 0.4018 0.2458 0.07478 0.02622 0.01749

 0.004301 

0.419354838709677 0.2982 0.1792 0.07346 0.02594 0.0173

 0.004268 

0.451612903225806 0.2604 0.1504 0.059 0.02078 0.01386

 0.003419 

0.483870967741936 0.1516 0.1108 0.03986 0.01402 0.009351

 0.002317 

0.516129032258065 0.1362 0.08344 0.03079 0.01092 0.007283

 0.001797 

0.548387096774194 0.1048 0.06454 0.02468 0.008763 0.005844

 0.001443 

0.580645161290323 0.08809 0.05881 0.01902 0.006669 0.004448

 0.001103 

0.612903225806452 0.0865 0.05044 0.01525 0.005424 0.003617

 0.0008921 

0.645161290322581 0.07884 0.04963 0.01319 0.004632 0.003089

 0.0007725 

0.67741935483871 0.0314 0.01927 0.00546 0.001925 0.001284

 0.0003185 

0.709677419354839 0.02562 0.01469 0.004964 0.00185 0.001234

 0.0003043 

0.741935483870968 0.01969 0.01145 0.003905 0.00138 0.0009203

 0.0002271 

0.774193548387097 0.01868 0.0113 0.003639 0.001283 0.0008556

 0.0002111 

0.806451612903226 0.01826 0.01077 0.003288 0.001157 0.0007716

 0.0001899 

0.838709677419355 0.01232 0.007263 0.002698 0.0009616 0.0006413

 0.0001583 

0.870967741935484 0.01051 0.006424 0.002224 0.0007965 0.0005313

 0.000134 

0.903225806451613 0.00722 0.004817 0.00188 0.0006844 0.0004564

 0.0001127 

0.935483870967742 0.005025 0.002831 0.0009906 0.0003479 0.000232

 5.722e-005 

0.967741935483871 0.0002063 0.0001202 4.488e-005 1.708e-005 1.149e-005

 4.631e-006 

0.1 2.3601 1.5578 0.5336 0.18756 0.1251 0.030858 

 Average of yearly averages:

 0.00870974503333334 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: FLSt_C 

Metfile: w12842.dvf 

PRZM scenario: FLstrawberry_WirrigSTD.txt 
EXAMS environment file: pond298.exv 

Chemical Name: DMDS 

Description Variable Name Value Units Comments 

Molecular weight mwt 94.2 g/mol 

Henry's Law Const. henry 0.001 atm-m^3/mol 

Vapor Pressure vapr 22.5 torr 

Solubility sol 27020 mg/L 

Kd Kd 0.641 mg/L 

Koc Koc mg/L 

Photolysis half-life kdp 1.17 days Half-life 

Aerobic Aquatic Metabolism kbacw 9.32 days Halfife 

Anaerobic Aquatic Metabolism kbacs 0 days Halfife 

Aerobic Soil Metabolism asm 4.66 days Halfife 

Hydrolysis: pH 4 0 days Half-life 

Hydrolysis: pH 7 0 days Half-life 

Hydrolysis: pH 9 0 days Half-life 

Method: CAM 4 integer See PRZM manual 

Incorporation Depth: DEPI 12.7 cm 

Application Rate: TAPP 1 kg/ha 

Application Efficiency: APPEFF 1 fraction 

Spray Drift DRFT 0 fraction of application rate applied to pond 

Application Date Date 01-09 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 3 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 

Flag for Index Res. Run IR EPA Pond 

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

entire run) 
Figure C-2. pe5 run for Florida Strawberry – Shank Injection Scenario. 

stored as FLSt_S.out 

Chemical: DMDS 

PRZM environment: FLstrawberry_WirrigSTD.txt modified Tueday, 26 August 

2008 at 06:16:38 

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

06:14:08 

Metfile: w12842.dvf modified Tueday, 26 August 2008 at 06:14:20 

Water segment concentrations (ppb) 

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 

1961 0.005393 0.003038 0.0009992 0.000351 0.0002341 5.773e-005 

1962 0.006029 0.003491 0.001072 0.0003909 0.0002607 6.433e-005 

1963 0.002167 0.001206 0.0004916 0.0002141 0.0001429 3.527e-005 

1964 0.0168 0.0107 0.003356 0.001189 0.0007929 0.000195 

1965 0.008434 0.004718 0.001806 0.0007479 0.0004988 0.0001231 

1966 0.03511 0.02159 0.006123 0.002167 0.001445 0.0003565 

1967 0.0003818 0.0002191 8.952e-005 3.333e-005 2.225e-005 5.641e-006 

1968 0.02402 0.01397 0.004002 0.00141 0.0009405 0.0002313 

1969 0.01701 0.01004 0.00284 0.001021 0.0006807 0.000168 

1970 0.01244 0.008113 0.002814 0.0009981 0.0006657 0.0001643 

1971 0.07275 0.04841 0.01694 0.006044 0.004031 0.0009942 

1972 0.000458 0.0002666 0.0001065 4.121e-005 2.75e-005 7.167e-006 

1973 0.006528 0.003825 0.001909 0.000701 0.0004677 0.0001154 

1974 0.03003 0.02224 0.006738 0.002363 0.001576 0.0003888 

1975 0.03656 0.02168 0.008946 0.003215 0.002145 0.0005291 

1976 0.04186 0.02564 0.008023 0.002874 0.001917 0.0004717 

1977 0.00964 0.005898 0.0025 0.0009981 0.0006657 0.0001644 

1978 0.009779 0.005877 0.0017 0.0006513 0.0004347 0.0001073 

1979 0.003575 0.00258 0.001062 0.0003943 0.000263 6.491e-005 

1980 0.0007153 0.0004817 0.0001945 7.685e-005 5.131e-005 1.265e-005 

1981 0.005443 0.004023 0.001261 0.0004635 0.0003092 7.626e-005 

1982 0.04815 0.03063 0.009633 0.003524 0.00235 0.0005796 

1983 0.003267 0.002127 0.0008923 0.0003238 0.000216 5.354e-005 

1984 0.02176 0.01248 0.003319 0.001177 0.0007847 0.000193 

1985 0.0005387 0.0003092 0.0001566 7.686e-005 5.163e-005 1.281e-005 

1986 0.0003584 0.0002185 0.0001299 5.554e-005 3.725e-005 9.195e-006 

1987 0.00257 0.00153 0.0005479 0.0002176 0.0001452 3.581e-005 

1988 0.002311 0.001702 0.0006031 0.0002183 0.0001456 3.583e-005 

1989 0.001361 0.0008088 0.0002728 0.0001171 7.817e-005 1.93e-005 

1990 0.0005487 0.0003781 0.0001047 4.699e-005 3.134e-005 7.739e-006 

Sorted results 

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

0.032258064516129 0.07275 0.04841 0.01694 0.006044 0.004031

 0.0009942 

0.0645161290322581 0.04815 0.03063 0.009633 0.003524

 0.00235 0.0005796 

0.0967741935483871 0.04186 0.02564 0.008946 0.003215

 0.002145 0.0005291 

0.129032258064516 0.03656 0.02224 0.008023 0.002874 0.001917

 0.0004717 

0.161290322580645 0.03511 0.02168 0.006738 0.002363 0.001576

 0.0003888 

0.193548387096774 0.03003 0.02159 0.006123 0.002167 0.001445

 0.0003565 
0.225806451612903 0.02402 0.01397 0.004002 0.00141 0.0009405

 0.0002313 

0.258064516129032 0.02176 0.01248 0.003356 0.001189 0.0007929

 0.000195 

0.290322580645161 0.01701 0.0107 0.003319 0.001177 0.0007847

 0.000193 

0.32258064516129 0.0168 0.01004 0.00284 0.001021 0.0006807

 0.000168 

0.354838709677419 0.01244 0.008113 0.002814 0.0009981 0.0006657

 0.0001644 

0.387096774193548 0.009779 0.005898 0.0025 0.0009981 0.0006657

 0.0001643 

0.419354838709677 0.00964 0.005877 0.001909 0.0007479 0.0004988

 0.0001231 

0.451612903225806 0.008434 0.004718 0.001806 0.000701 0.0004677

 0.0001154 

0.483870967741936 0.006528 0.004023 0.0017 0.0006513 0.0004347

 0.0001073 

0.516129032258065 0.006029 0.003825 0.001261 0.0004635 0.0003092

 7.626e-005 

0.548387096774194 0.005443 0.003491 0.001072 0.0003943 0.000263

 6.491e-005 

0.580645161290323 0.005393 0.003038 0.001062 0.0003909 0.0002607

 6.433e-005 

0.612903225806452 0.003575 0.00258 0.0009992 0.000351 0.0002341

 5.773e-005 

0.645161290322581 0.003267 0.002127 0.0008923 0.0003238 0.000216

 5.354e-005 

0.67741935483871 0.00257 0.001702 0.0006031 0.0002183 0.0001456

 3.583e-005 

0.709677419354839 0.002311 0.00153 0.0005479 0.0002176 0.0001452

 3.581e-005 

0.741935483870968 0.002167 0.001206 0.0004916 0.0002141 0.0001429

 3.527e-005 

0.774193548387097 0.001361 0.0008088 0.0002728 0.0001171 7.817e-005

 1.93e-005 

0.806451612903226 0.0007153 0.0004817 0.0001945 7.686e-005 5.163e-005

 1.281e-005 

0.838709677419355 0.0005487 0.0003781 0.0001566 7.685e-005 5.131e-005

 1.265e-005 

0.870967741935484 0.0005387 0.0003092 0.0001299 5.554e-005 3.725e-005

 9.195e-006 

0.903225806451613 0.000458 0.0002666 0.0001065 4.699e-005 3.134e-005

 7.739e-006 

0.935483870967742 0.0003818 0.0002191 0.0001047 4.121e-005 2.75e-005

 7.167e-006 

0.967741935483871 0.0003584 0.0002185 8.952e-005 3.333e-005 2.225e-005

 5.641e-006 

0.1 0.04133 0.0253 0.0088537 0.0031809 0.0021222 0.00052336 

 Average of yearly averages:

 0.000175996066666667 

Inputs generated by pe5.pl - Novemeber 2006 

Data used for this run: 

Output File: FLSt_S 
Metfile: w12842.dvf 

PRZM scenario: FLstrawberry_WirrigSTD.txt 

EXAMS environment file: pond298.exv 

Chemical Name: DMDS 

Description Variable Name Value Units Comments 

Molecular weight mwt 94.2 g/mol 

Henry's Law Const. henry 0.001 atm-m^3/mol 

Vapor Pressure vapr 22.5 torr 

Solubility sol 27020 mg/L 

Kd Kd 0.641 mg/L 

Koc Koc mg/L 

Photolysis half-life kdp 1.17 days Half-life 

Aerobic Aquatic Metabolism kbacw 9.32 days Halfife 

Anaerobic Aquatic Metabolism kbacs 0 days Halfife 

Aerobic Soil Metabolism asm 4.66 days Halfife 

Hydrolysis: pH 4 0 days Half-life 

Hydrolysis: pH 7 0 days Half-life 

Hydrolysis: pH 9 0 days Half-life 

Method: CAM 8 integer See PRZM manual 

Incorporation Depth: DEPI 25 cm 

Application Rate: TAPP 1 kg/ha 

Application Efficiency: APPEFF 1 fraction 

Spray Drift DRFT 0 fraction of application rate applied to pond 

Application Date Date 01-09 dd/mm or dd/mmm or dd-mm or dd-mmm 

Record 17: FILTRA 

 IPSCND 3 

 UPTKF 

Record 18: PLVKRT 

 PLDKRT 

 FEXTRC 

Flag for Index Res. Run IR EPA Pond 

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

entire run)