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### INITIAL REVIEW EXPOSURE REPORT (IRExR)
Chemical ID: P-10-0367 Reviewer: Sherer/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 =NA PDM Days Exceede d LADD ADR LADD ADR LADD

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

MFG: Max ADR MFG: Max LADD PROC2: Max ADR PROC2: Max LADD

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufact uring (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 (ADR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution Model (PDM). There 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 7Q10 streamflow, which is defined as the average daily streamflow of the seven consecutive days of lowest flow within a ten year period.
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INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0367 Assessor: Sherer/SS
ENVIRONMENTAL RELEASES
Scenario#:1 Number of Release Sites: Release Activity: MFG: Max ADR Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

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

No n-sludge/Sludge Release Days/yr:
Per Site Release: (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Re m arks:5/21/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-03675/21/10 page of5/21/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0367 Assessor: Sherer/SS
ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: Release Activity: MFG: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

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

No n-sludge/Sludge Release Days/yr:
Per Site Release: (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

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INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-03675/21/10 page of5/21/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0367 Assessor: Sherer/SS
ENVIRONMENTAL RELEASES
Scenario#:3 Number of Release Sites: Release Activity: PROC2: Max ADR Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (kg/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:5/21/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-03675/21/10 page of5/21/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0367 Assessor: Sherer/SS
ENVIRONMENTAL RELEASES
Scenario#:4 Number of Release Sites: Release Activity: PROC2: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (kg/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)

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INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-03675/21/10 page of