2/22/12 Page 1 of 15



### POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0607 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 = 6 PDM Days Exceede d LADD ADR LADD ADR LADD

Release activity(ies) 2 ; exposure calculation(s) 3 mg/kg/day m g/kg/day mg/kg/day mg/kg/day μg/l # Days mg/kg/day m g/kg/day mg/kg/day m g/kg/day mg/kg/day

max acute eco --- --- --- --- --- --- --- 2 .53E+00 --- --- --- Max LADD --- --- --- --- --- --- --- --- 1.47E-02 --- ---

Max LADD --- --- --- --- --- --- 3.46E-04 --- --- --- ---

Max LADD --- --- --- --- --- --- 2.32E-04 --- --- --- ---

Max LADD --- --- --- --- --- --- 2.61E-04 --- 2 .54E-04 --- ---

1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation. 2 Release activities are from engineering repor t's Manufacturing (Mfg), Processing (Proc) and Use release activity labels.Multipl e release activities are combined in one exposure scenar io 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 e xposure scenario. CC is the aquatic concentration of concern. 4 This column displays concentration va lues for the 7Q10 streamflow, which is de fined as the average daily streamflow of the seven consecutive days of lo west 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 1.47E-02 Groundwater Dose (mg/kg/day) No NA Surface Water Release After Treatment (kg/yr) NA Total Release After Treatment (kg/yr) NA Consumer Use? 

### Fate test recommendations?: (default is NA)2/22/12 Page 2 of 15

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0607 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:1 Number of Release Sites: Release Activity: Max ADR Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:2/22/12 Page 3 of 15

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0607
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 1 RELEASE ACTIVITY: 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 Concen tration (Stack): 150.00 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 1.37E+04 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) 1.10E-02 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 6.00E-02 N/ A 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 2.53 N/A NA 1 day 71.80 0.55

Inhalation Comments:2/22/12 Page 4 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

Do wnwash Information:
Facility Length: NA m Facility Width: NA m Facility Height: NA m2/22/12 Page 5 of 15

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0607 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: Release Activity: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:2/22/12 Page 6 of 15

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0607
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 2 RELEASE ACTIVITY: : 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 Concen tration (Stack): 200.00 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) 1.47E-02 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 8.00E-02 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:2/22/12 Page 7 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

Do wnwash Information:
Facility Length: NA m Facility Width: NA m Facility Height: NA m2/22/12 Page 8 of 15

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0607 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:3 Number of Release Sites: Release Activity: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:2/22/12 Page 9 of 15

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0607

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 3 ACTIVITY: 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 (%)

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) Negl igible 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 3.46E-04 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.77E-02 30.00 75.00 NA NA

REMARKS:2/22/12 Page 10 of 15

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0607 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:4 Number of Release Sites: Release Activity: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:2/22/12 Page 11 of 15

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0607

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 4 ACTIVITY: 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 (%)

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) Negl igible 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 2.32E-04 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.19E-02 30.00 75.00 NA NA

REMARKS:2/22/12 Page 12 of 15

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0607 Assessor: Flessner/SS
ENVIRONMENTAL RELEASES
Scenario#:5 Number of Release Sites: Release Activity: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:2/22/12 Page 13 of 15

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0607

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 5 ACTIVITY: 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 (%)

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) Negl igible 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 2.61E-04 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.34E-02 30.00 75.00 NA NA

REMARKS:2/22/12 Page 14 of 15

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0607
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 5 RELEASE ACTIVI TY: 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): 3.46 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) 2.54E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.38E-03 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:2/22/12 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

Do wnwash Information:
Facility Length: NA m Facility Width: NA m Facility Height: NA m