10/16/2015 Page of



### POST FOCUS EXPOSURE REPORT
This updated assessment is based on the Po st-Focus Draft Revisi on 1 dated 10/14/2015.
Chemical ID: P-15-0573 Reviewer: Wong/EN

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

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air

Release activity(ies) 2 ; exposure calculation(s) 3 Drinking Water Fish Ingestion 7Q10 4 CC = 220 PDM Days Exceeded LADD ADR LADD ADR LADD ADR LADD ADR LADD

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
USE: Max ADR: max acute eco 2.26E-03 --- 2.15E-04 --- 1.04E+02 --- --- --- --- --- ---
USE: PDM1 --- --- --- --- 1.04E+02 6 --- --- --- --- ---
USE: Max LADD --- 1.33E-05 --- 5.35E-07 --- --- 1.47E-04 --- --- --- ---

1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufacturing (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), Life time 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.

Remarks:10/16/2015 Page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573 Assessor: Wong/EN

ENVIRONMENTAL RELEASES

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

Total Releases: 448.00 0.00 N/A N/A (kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr: 80.00 0.00/0.00 N/A N/A

Per Site Release: 5.60 0.00/0.00 N/A N/A (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

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POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573

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

SCENARIO #: 1 Number of Site s: 1 RELEASE ACTIVITY:USE: Max ADR SIC-CODE DESCRIPTION: Orga nic Chemicals Manufacture SIC-CODE (S): 2865,2869 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
90.00 80. 5.6 0.56 0.00 5.56

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 2825.61 935.49 634.16 514.20 0.20 0.60 0.88 1.09

ALL 10 50.57 9.38 5.41 4.53 11.07 59.70 103.51 123.62

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

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

Units 50% 10% 50% 10%

Cancer

LADD pot 2.39E-07 1.33E-05 mg/kg/day 9.58E-09 5.35E-07 mg/kg/day

LADC pot 1.84E-05 1.03E-03 mg/L 1.02E-04 5.71E-03 mg/kg

Acute

ADR pot 2.27E-05 2.26E-03 mg/kg/day 3.84E-06 2.15E-04 mg/kg/day

SIC Code Comments:10/16/2015 Page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573 Assessor: Wong/EN

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: 1. Release Activity: USE: PDM1 Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: 448.00 0.00 N/A N/A (kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr: 80.00 0.00/0.00 N/A N/A

Per Site Release: 5.60 0.00/0.00 N/A N/A (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:10/16/2015 Page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573

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

SCENARIO #: 2 Number of S ites: 1 RELEASE ACTIVITY:USE: PDM1 SIC-CODE DESCRIPTION: Orga nic Chemicals Manufacture SIC-CODE (S): 2865,2869 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
90.00 80. 5.6 0.56 0.00 5.56

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 2825.61 935.49 634.16 514.20 0.20 0.60 0.88 1.09

ALL 10 50.57 9.38 5.41 4.53 11.07 59.70 103.51 123.62

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

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

Units 50% 10% 50% 10%

Cancer

LADD pot 2.39E-07 1.33E-05 mg/kg/day 9.58E-09 5.35E-07 mg/kg/day

LADC pot 1.84E-05 1.03E-03 mg/L 1.02E-04 5.71E-03 mg/kg

Acute

ADR pot 2.27E-05 2.26E-03 mg/kg/day 3.84E-06 2.15E-04 mg/kg/day

SIC Code Comments:10/16/2015 Page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: USE: PDM1 SIC CODE DESCRIPTION: Orga nic Chemicals Manufacture ASSOCIATED SIC CODES: 2865,2869

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

220.00 2 6 80.00 5.60 90.00 High10/16/2015 Page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573 Assessor: Wong/EN

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: 1. Release Activity: USE: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: 448.00 448.00 N/A N/A (kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr: 1.00 1.00/0.00 N/A N/A

Per Site Release: 448.00 448.00/0.00 N/A N/A (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:10/16/2015 Page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-15-0573

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

SCENARIO #: 3 Number of Site s: 1 RELEASE ACTIVITY:USE: Max LADD SIC-CODE DESCRIPTION: Orga nic Chemicals Manufacture SIC-CODE (S): 2865,2869 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
90.00 1. 448. 44.80 0.00 5.56

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 2825.61 935.49 634.16 514.20 N/A N/A N/A N/A

ALL 10 50.57 9.38 5.41 4.53 N/A N/A N/A N/A

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

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

Units 50% 10% 50% 10%

Cancer

LADD pot 2.39E-07 1.33E-05 mg/kg/day 9.58E-09 5.35E-07 mg/kg/day

LADC pot 1.84E-05 1.03E-03 mg/L 1.02E-04 5.71E-03 mg/kg

Acute

ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:10/16/2015 Page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-15-0573

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 3 ACTIVITY: USE: 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 (%)

1. 448.00/1.00 0.00/0.00 Moderate 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) Negligible 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

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.47E-04 33.00 78.00 80.00 1.04 LADC pot (mg/L) 1.13E-02 33.00 78.00 NA NA

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