10/3/12 page of



### POST FOCUS EXPOSURE REPORT

Chemical ID: P-12-0437 Reviewer: Kwon/SS

Results Table: Dose, Concentration, and Days Exceeded Results Summary

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air Drinking Water Fish Ingestion
ADR LADD ADR LADD 7Q10 4
CC = 11 PDM Days Exceede d LADD ADR LADD ADR LADD

Release activity(ies) 2 ; exposure calculation(s) 3 mg/kg/day m g/kg/day mg/kg/day mg/kg/day μg/l # Days mg/kg/day m g/kg/day mg/kg/day m g/kg/day mg/kg/day

Max LADD --- --- --- --- --- --- 2.27E-05 --- --- --- --- Max LADD --- --- --- --- --- --- 1.72E-05 --- --- --- ---

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manuf acturing (Mfg), Processing (Proc) and Use release activity labels.Multiple release activities are combined in one exposure scenario if their releases occur at same location. 3 Exposure calculations are Acute Dose Rate (A DR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution Model (PDM). Th ere may be one, two, or all three exposure calculations per exposure scenario.CC is the aquatic concentration of concern. 4 This column displays concentration values for the 7Q 10 streamflow, which is defined as the average daily streamflow of the seven consecutive days of lowest flow within a ten year period.

Remarks:


### Results Table: Exposure Based (X B)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Wate r Dose (mg/kg/day) No NA Fish Ingestion Dose (mg/kg/day) No NA Inhalation Dose (mg/kg/day) No NA Groundwater Dose (mg/kg/day) No NA Surface Water Release After Treatment (kg/yr) No NA Total Release After Treatment (kg/yr) Consumer Use? No



### Fate test recommendations?: (default is NA)10/3/12 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-12-0437 Assessor: Kwon/SS

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: Max LADD
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases:
(k g/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr:

Per Site Release:
(kg /site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:10/3/12 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-12-0437

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 1 ACTIVITY: : Max LADD

RELEASE DESCRIPTION:

EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1
AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negl igible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4. 5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2. 5 7. 55E-5

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day)
Cancer
LADD pot (mg/kg/day) 2.27E-05 30.00 75.00 71.80 1.40
LADC pot (mg/L) 1.17E-03 30.00 75.00 NA NA

REMARKS:10/3/12 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-12-0437 Assessor: Kwon/SS

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: Max LADD
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases:
(k g/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr:

Per Site Release:
(kg /site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:10/3/12 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-12-0437

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 2 ACTIVITY: Max LADD

RELEASE DESCRIPTION:

EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1
AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negl igible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4. 5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2. 5 7. 55E-5

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day)
Cancer
LADD pot (mg/kg/day) 1.72E-05 30.00 75.00 71.80 1.40
LADC pot (mg/L) 8.81E-04 30.00 75.00 NA NA

REMARKS: