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### POST FOCUS EXPOSURE REPORT

Chemical ID: P-12-0551 Review er: Tobias/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 = 78 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

USE: Max ADR: max acute eco 1.75E-03 --- 8.57E-04 --- 32.55 --- --- --- --- 2.10E-01 --- USE: Max LADD

--- 1.75E-06 --- 5.24E-07 --- --- --- --- --- --- 4.59E-03 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) Yes NA 4.59E-03 Groundwater Dose (mg/kg/day) No NA Surface Water Release After Treatment (kg/yr) No NA Total Release After Treatment (kg/yr) No NA Consumer Use? No


### Fate test recommendations?: (default is NA)1/30/13 page of

PO ST FOCUS EXPOSURE REPORT

Chemical ID: P-12-0551 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES
Scenario#:1 Number of Release Sites: Release Activity: USE: 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:1/30/13 page of

PO S T FOCUS EXPOSURE REPORT

Chemical ID: P-12-0551 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER:1 RELEASE ACTIVITY: USE: Max ADR
FACILITY NAME:
FACILITY LOCATION:
RECEIVING WATER NAME:
REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:
NPDES PERMIT #: EXPOSED POPULATION:

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 69.90

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) CONCENTRATION ( μ g/L) 6.82 20.95 32.55 32.55 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 1.75E-06 mg/kg/day 5.24E-07 mg/kg/day
LADC pot 8.97E-05 mg/L 6.27E-03 mg/kg
Acute

ADR pot 1.75E-03 mg/kg/day 8.57E-04 mg/kg/day

Surface Water Comments:1/30/13 page of

PO S T FOCUS EXPOSURE REPORT Chemical ID: P-12-0551

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY:USE: Max ADR
RELEASE DESCRIPTION:
METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: k g/site/day Fugitive Release Days per Year: d ays % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 62.40 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 1140.00 μg/m 3

Per Site Stack Release: kg/site/day
Stack Release Days per Year: days
% Removal via Stack Release: %
Total Stack Release: kg/yr Max Annual Average Air Con centration (Stack): 0.00 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.00 μg/m 3

ASSUMPTIONS Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) N/A 4.59E-03 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) N/A 2.50E-02 30.00 75.00 NA NA
Acute
ADR pot (mg/kg/day) N/A 0.21 NA 1 day 71.80 0.55

Inhalation Comments:1/30/13 page of

Stack Parameter Data Fugitive Parameter Data Stack Height 10.00 Release Height: 3.00 m
Inside Stack Diameter: 0.10 Length of Release Opening: 10.00 m

Stack Gas Exit Velocity: 0.10 Width of Release Opening: 10.00 m

Stack Gas Temperature: 293.00

Meteorological and Terrain Information:
Surrounding Land Use: Rural Terrain Height: 0.00 m
Distance to Residence of Interest: 100.00 m Meteorological Class: Full Stability Class: NA Wind Speed: NA

Downwash Information:
Facility Length: NA m Facility Width: NA m Facility Height: NA m1/30/13 page of

PO ST FOCUS EXPOSURE REPORT

Chemical ID: P-12-0551 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: Release Activity: USE: 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)

Remarks:1/30/13 page of

PO S T FOCUS EXPOSURE REPORT

Chemical ID: P-12-0551 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER:2 RELEASE ACTIVITY: USE: Max LADD
FACILITY NAME:
FACILITY LOCATION:
RECEIVING WATER NAME:
REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:
NPDES PERMIT #: EXPOSED POPULATION:

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 69.90

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) CONCENTRATION ( μ g/L) N/A N/A N/A N/A 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 1.75E-06 mg/kg/day 5.24E-07 mg/kg/day
LADC pot 8.97E-05 mg/L 6.27E-03 mg/kg
Acute

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

Surface Water Comments:1/30/13 page of

PO S T FOCUS EXPOSURE REPORT Chemical ID: P-12-0551

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY:USE: Max LADD
RELEASE DESCRIPTION:
METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: k g/site/day Fugitive Release Days per Year: d ays % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 62.40 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A μg/m 3

Per Site Stack Release: kg/site/day
Stack Release Days per Year: days
% Removal via Stack Release: %
Total Stack Release: kg/yr Max Annual Average Air Con centration (Stack): 0.00 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

ASSUMPTIONS Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) N/A 4.59E-03 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) N/A 2.50E-02 30.00 75.00 NA NA
Acute
ADR pot (mg/kg/day) N/A N/A NA 1 day 71.80 0.55

Inhalation Comments:1/30/13 page of

Stack Parameter Data Fugitive Parameter Data Stack Height 10.00 Release Height: 3.00 m
Inside Stack Diameter: 0.10 Length of Release Opening: 10.00 m

Stack Gas Exit Velocity: 0.10 Width of Release Opening: 10.00 m

Stack Gas Temperature: 293.00

Meteorological and Terrain Information:
Surrounding Land Use: Rural Terrain Height: 0.00 m
Distance to Residence of Interest: 100.00 m Meteorological Class: Full Stability Class: NA Wind Speed: NA

Downwash Information:
Facility Length: NA m Facility Width: NA m Facility Height: NA m