11/28/12 Page 1 of 8



### POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513 Reviewer: Flessner/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=20;

1000 PDM Days Exceeded 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 μ g/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day
Max acute eco --- --- --- --- 2950.09 --- --- --- --- --- ---

PDM --- --- --- --- 177.45 --- --- --- --- ---

Max Acute eco --- --- --- --- 471.70 --- --- --- --- --- ---
1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufactur ing (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 streamflow of the 7 consecutive days of lowest flow within a 10 year period.

Remarks:

Results Table: Exposure Based (XB)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Water Do se (mg/kg/day) No N/A Fish Ingestion Dose (mg/kg/day) No N/A Inhalation Dose (mg/kg/day) No N/A Groundwater Dose (mg/kg/day) No N/A Surface Water Release After Treatment (kg/yr) Total Release After Treatment (kg/yr) No N/A11/28/12 Page 2 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513 Assessor: Flessner/SS

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: Max acute eco
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:11/28/12 Page 3 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Site s: RELEASE ACTIVITY: Max acute eco

SIC-CODE DESCRIPTION: SIC-CODE (S): EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

0.00 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 5.65 17.06 25.17 31.04

ALL 10 315.60 1701.49 2950.09 3523.18

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 2.41E-07 1.35E-05 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.24E-05 6.92E-04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.43E-03 0.14 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:11/28/12 Page 4 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: PDM
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:11/28/12 Page 5 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY: PDM

SIC-CODE DESCRIPTION: SIC-CODE (S): EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

0.00 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 0.34 1.03 1.51 1.87

ALL 10 18.98 102.35 177.45 211.92

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 3.78E-07 2.11E-05 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.94E-05 1.08E-03 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 8.58E-05 8.55E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:11/28/12 Page 6 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: PDM

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES:

SIC CODE RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis

20.00 High

1000.00 High11/28/12 Page 7 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: Release Activity: Max acute eco
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:11/28/12 Page 8 of 8

POST FOCUS EXPOSURE REPORT

Chemical ID: P-08-0513

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 Number of Sites: RELEASE ACTIVITY: Max acute eco

SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

0.00 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 3.98 11.36 18.66 22.19

ALL 10 11.11 1.94 1.06 0.96 45.00 257.73 471.70 520.83

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 8.51E-07 9.62E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 4.36E-05 4.93E-04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 9.49E-04 2.15E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments: