Sethoxydim Risk Assessment

SUMMARY TABLES FOR HUMAN HEALTH RISK ASSESSMENT  
Worksheet E01: Summary of Worker Exposure Scenarios 
Scenario 
Central 
Dose (mg/kg/day or event) 
Lower 
Upper 
Exposure 
Assessment 
Worksheet 
General Exposures (dose in mg/kg/day) 
Directed ground spray 
(Backpack) 
3.94e-03 
4.22e-05 
3.00e-02 
C01a 
Broadcast ground spray 
(Boom spray) 
6.72e-03 
6.19e-05 
5.67e-02 
C01b 
Aerial applications 
N/A 
C01c 
Accidental/Incidental Exposures (dose in mg/kg/event) 
Immersion of Hands, 
1.94e-04 
1.90e-05 
7.56e-04 
C02a 
1 minute 
Contaminated Gloves, 
1.17e-02 
1.14e-03 
4.54e-02 
C02b 
1 hour 
Spill on hands, 
3.80e-04 
2.53e-05 
2.16e-03 
C03a 
1 hour 
Spill on lower legs, 
9.36e-04 
6.23e-05 
5.32e-03 
C03b 
1 hour 
WS-38  

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Worksheet E02: Summary of risk characterization (HQ’s
1
) for workers. 
Acute RfD 
0.6 
mg/kg/day 
Sect. 3.3.3. 
Chronic RfD 
0.09 
mg/kg/day 
Sect. 3.3.3. 
Scenario 
Hazard Quotient Based on Chronic RfD 
Exposure 
Assessment 
Worksheet
Central 
Lower 
Upper 
General Exposures [using Chronic RfD] 
Directed ground spray 
(Backpack) 
4e-02 
5e-04 
3e-01 
C01a 
Broadcast ground spray 
(Boom spray) 
7e-02 
7e-04 
6e-01 
C01b 
Aerial applications 
N/A 
Accidental/Incidental Exposures [using Acute RfD] 
Scenario 
Hazard Quotient Based on Acute RfD 
Exposure 
Assessment 
Worksheet
Central 
Lower 
Upper 
Immersion of Hands, 
1 minute 
3e-04 
3e-05 
1e-03 
C02a 
Contaminated Gloves, 
1 hour 
2e-02 
2e-03 
8e-02 
C02b 
Spill on hands, 
1 hour 
6e-04 
4e-05 
4e-03 
C03a 
Spill on lower legs, 
1 hour 
2e-03 
1e-04 
9e-03 
C03b 
1
 Hazard quotient is the level of exposure divided by the provisional RfD then rounded to one significant 
decimal place or digit. See Worksheet E01 for summary of exposure assessment. 
WS-39  

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Worksheet E03: Summary of Exposure Scenarios for the General Public 
Target 
Dose (mg/kg/day) 
Worksheet 
Scenario 
Central 
Lower 
Upper 
Acute/Accidental Exposures 
Direct spray, entire body 
Child 
1.44e-02 
9.54e-04 
8.15e-02 
D01a 
Direct spray, lower legs 
Woman 
1.44e-03 
9.59e-05 
8.19e-03 
D01b 
Dermal, contaminated 
Woman 
7.38e-04 
8.94e-05 
2.10e-03 
D02 
vegetation 
Contaminated fruit 
Woman 
3.53e-03 
1.10e-03 
7.00e-02 
D03 
Contaminated water, spill 
Child 
2.05e-01 
1.94e-02 
7.68e-01 
D05 
Contaminated water, stream 
Child 
4.51e-03 
8.60e-05 
2.11e-02 
D06 
Consumption of fish,  general 
Man 
7.38e-03 
1.15e-03 
1.85e-02 
D08a 
public 
Consumption of fish, 
Man 
3.60e-02 
5.60e-03 
8.99e-02 
D08b 
subsistence populations 
Chronic/Longer Term Exposures 
Contaminated fruit 
Woman 
1.70e-04 
5.30e-05 
3.37e-03 
D04 
Consumption of water 
Man 
6.86e-06 
3.75e-08 
1.54e-05 
D07 
Consumption of fish, general 
public 
Man 
2.40e-07 
1.88e-09 
4.50e-07 
D09a 
Consumption of fish, 
subsistence populations 
Man 
1.94e-06 
1.52e-08 
3.65e-06 
D09b 
WS-40  

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Worksheet E04: Summary of risk characterization (HQ’s
1
) for the general public 
1
 . 
Chronic RfD 
0.09 
mg/kg/day 
Sect. 3.3.3.  
Acute RfD 
0.6 
mg/kg/day 
Sect. 3.3.3.  
Target 
Hazard Quotient 
Worksheet 
Scenario 
Central 
Lower 
Upper 
Acute/Accidental Exposures 
Direct spray, entire body 
Child 
2e-02 
2e-03 
1e-01 
D01a 
Direct spray, lower legs 
Woman 
2e-03 
2e-04 
1e-02 
D01b 
Dermal, contaminated 
Woman 
1e-03 
1e-04 
4e-03 
D02 
vegetation 
Contaminated fruit 
Woman 
6e-03 
2e-03 
1e-01 
D03 
Contaminated water, spill 
Child 
3e-01 
3e-02 
1.3 
D05 
Contaminated water, stream 
Child 
8e-03 
1e-04 
4e-02 
D06 
Consumption of fish, 
Man 
1e-02 
2e-03 
3e-02 
D08a 
general public 
Consumption of fish, 
Man 
6e-02 
9e-03 
1e-01 
D08b 
subsistence populations 
Chronic/Longer Term Exposures 
Contaminated fruit 
Woman 
2e-03 
6e-04 
4e-02 
D04 
Consumption of water 
Man 
8e-05 
4e-07 
2e-04 
D07 
Consumption of fish, 
general public 
Man 
3e-06 
2e-08 
5e-06 
D09a 
Consumption of fish, 
subsistence populations 
Man 
2e-05 
2e-07 
4e-05 
D09b 
1
 Hazard quotient is the level of exposure divided by the provisional RfD then rounded to one or two significant 
decimal places or digits. See Worksheet E01 for summary of exposure assessments.  Hazard quotients >0.5 and 
<1.5 are shown to two significant digits.  All others are rounded to one significant decimal place or integer. 
WS-41  

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