4/20/2011 Page 1 of 7



### POST FOCUS EXPOSURE REPORT
Chemical ID: P-09-0107 Reviewer: Bevington/SD

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 = 110 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 acute eco --- --- --- --- 1.62E+00 --- --- --- --- --- ---

Use2: max acute eco --- --- --- --- 1.36E+03 --- --- --- --- --- ---

Use1: max acute eco --- --- --- --- 3.40E+03 --- --- --- --- --- ---

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 exposu re 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 th ree 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:4/20/2011 Page 2 of 7

PO ST FOCUS EXPOSURE REPORT

Chemical ID: P-09-0107 Assessor: Bevington/SD

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)

Non-sludge/Sludge Release Days/yr:

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

Remarks:4/20/2011 Page 3 of 7

PO S T FOCUS EXPOSURE REPORT

Chemical ID: P-09-0107 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER:1 RELEASE ACTIVITY: Mfg: Max ADR

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 793.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) CONCENTRATION ( μ g/L) 0.39 1.04 1.62 1.98 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES

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

Cancer

LADD pot 8.30E-09 mg/kg/day 2.82E-08 mg/kg/day

LADC pot 4.26E-07 mg/L 3.38E-04 mg/kg

Acute

ADR pot 8.68E-05 mg/kg/day 5.53E-04 mg/kg/day

Surface Water Comments:4/20/2011 Page 4 of 7

PO ST FOCUS EXPOSURE REPORT

Chemical ID: P-09-0107 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: Use2: 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:4/20/2011 Page 5 of 7

PO S T FOCUS EXPOSURE REPORT

Chemical ID: P-09-0107 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER:2 RELEASE ACTIVITY: Use2: Max ADR

FACILITY NAME :
FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 793.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) CONCENTRATION ( μ g/L) 99.37 767.23 1363.64 1618.47 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES

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

Cancer

LADD pot 6.37E-06 mg/kg/day 2.16E-05 mg/kg/day

LADC pot 3.27E-04 mg/L 0.26 mg/kg

Acute

ADR pot 6.41E-02 mg/kg/day 0.14 mg/kg/day

Surface Water Comments:4/20/2011 Page 6 of 7

PO ST FOCUS EXPOSURE REPORT

Chemical ID: P-09-0107 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: Release Activity: Use1: 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:4/20/2011 Page 7 of 7

POST FOCUS EXPOSURE REPORT

Chemical ID: P-09-0107

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

SCENARIO #: 3 Number of Sites: RELEASE ACTIVITY:Use1: Max ADR

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)
0.00 793.00

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 28.67 81.78 134.33 159.79

ALL 10 11.11 1.94 1.06 0.96 324.03 1855.67 3396.23 3750.00

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 1.84E-06 2.08E-05 mg/kg/day 6.25E-06 7.06E-05 mg/kg/day

LADC pot 9.43E-05 1.07E-03 mg/L 7.48E-02 0.84 mg/kg

Acute

ADR pot 6.83E-03 0.16 mg/kg/day 4.08E-02 0.46 mg/kg/day

SIC Code Comments: