10/13/11 Page 1 of 15



### INITIAL REVIEW EXPOSURE REPORT (IRExR)
Chemical ID: P-11-0653 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 = 1000 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 3.49E-02 --- --- --- --- --- --- 2.11E-03 --- --- ---

USE: PDM1 --- --- --- --- 7.15E+02 --- --- --- --- --- USE: PDM2 --- --- --- --- 6.17E+02 --- --- --- --- --- USE: Max LADD --- 5.20E-04 --- --- --- --- --- --- 2.77E-05 --- ---
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) NA No Fish Ingestion Dose (mg/kg/day) NA No Inhalation Dose (mg/kg/day) NA No Groundwater Dose (mg/kg/day) NA No Surface Water Release After Treatment (kg/yr) NA Total Release After Treatment (kg/yr) NA Consumer Use? No 

### Fate test recommendations?: sta ndard battery of perfluoro tests10/13/11 Page 2 of 15

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0653 Assessor: Flessner/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:10/13/11 Page 3 of 15

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0653

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY:USE: Max ADR
SIC-CODE DESCRIPTION: SIC-CODE (S): 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 33.14 77.78 125.35 151.79
ALL 10 109.49 418.16 715.16 855.26

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 3.40E-05 1.12E-04 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.74E-03 5.76E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 6.50E-03 3.49E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:10/13/11 Page 4 of 15

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0653
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: kg/site/day Fugitive Release Days per Year: days % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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): 0.30 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 11.50 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) 2.21E-05 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.20E-04 N/A 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 2.11E-03 N/A NA 1 day 71.80 0.55

Inhalation Comments:10/13/11 Page 5 of 15

Stack Parameter Data Fugitive Parameter Data Stack Height 10.00 m Release Height: N/A
Inside Stack Diameter: 0.10 m Length of Release Opening: N/A

Stack Gas Exit Velocity: 0.10 m/sec Width of Release Opening: N/A

Stack Gas Temperature: 293.00 K

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 m10/13/11 Page 6 of 15

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0653 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: Release Activity: USE: PDM1 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:10/13/11 Page 7 of 15

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0653

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY:USE: PDM1
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 33.14 77.78 125.35 151.79
ALL 10 109.49 418.16 715.16 855.26

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 3.40E-05 1.12E-04 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.74E-03 5.76E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 6.50E-03 3.49E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:10/13/11 Page 8 of 15

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0653

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 2 RELEASE ACTIVITY: USE: PDM1
SIC CODE DESCRIPT ION:
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

1000.00 High10/13/11 Page 9 of 15

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0653 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:3 Number of Release Sites: Release Activity: USE: PDM2 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:10/13/11 Page 10 of 15

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0653

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 3 Number of Site s: RELEASE ACTIVITY:USE: PDM2
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 28.61 67.15 108.21 131.03
ALL 10 94.52 360.97 617.36 738.30

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 1.53E-04 5.05E-04 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 7.84E-03 2.59E-02 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 5.61E-03 3.02E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:10/13/11 Page 11 of 15

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0653

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 3 RELEASE ACTIVITY: USE: PDM2
SIC CODE DESCRIPT ION:
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

1000.00 High10/13/11 Page 12 of 15

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0653 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:4 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:10/13/11 Page 13 of 15

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0653

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 Number of Sites: RELEASE ACTIVITY:USE: Max LADD
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 N/A N/A N/A N/A
ALL 10 N/A N/A N/A N/A

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 1.57E-04 5.20E-04 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 8.08E-03 2.67E-02 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:10/13/11 Page 14 of 15

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0653
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 4 RELEASE ACTIVITY:USE: Max LADD
RELEASE DESCRIPTION:
METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: kg/site/day Fugitive Release Days per Year: days % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 0.00 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): 0.38 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) 2.77E-05 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.50E-04 N/A 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:10/13/11 Page 15 of 15

Stack Parameter Data Fugitive Parameter Data Stack Height 10.00 m Release Height: N/A
Inside Stack Diameter: 0.10 m Length of Release Opening: N/A

Stack Gas Exit Velocity: 0.10 m/sec Width of Release Opening: N/A

Stack Gas Temperature: 293.00 K

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