4/16/10 page of



### POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005 Reviewer: Kwon

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 = 1 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

Max ADR, PDM 1.18E-08 --- 2 .92E-07 --- 2.31E-04 --- 2 .81E-04 --- 1 .86E-03 ---

Max LADD --- 1 .45E-10 --- 3 .10E-09 --- --- --- --- 1.37E-05 --- 2.35E-05

Max ADR:
ma x acute eco 7.03E-03 --- 8 .51E-02 --- --- --- --- 9.16E-05 --- 2.76E-04 ---

PDM1 --- --- --- --- 1.57E+02 --- --- --- --- --- Max LADD --- 7 .23E-05 --- 1 .55E-03 --- --- 1 .56E-05 --- 7.17E-06 --- 8.68E-06 Max ADR:
ma x acute eco 3.70E-02 --- 4 .50E-01 --- --- --- --- 4.84E-04 --- --- ---

PDM1 --- --- --- --- 8.30E+02 --- --- --- --- --- Max LADD --- 2 .67E-04 --- 5 .72E-03 --- --- 5 .74E-05 --- 2.65E-05 --- --- Max ADR:
ma x acute eco 5.98E-03 --- 7 .25E-02 --- --- --- --- 7.79E-05 --- 4.78E-04 ---

PDM1 --- --- --- --- 1.34E+02 --- --- --- --- --- PDM2 --- --- --- --- 1.28E+01 --- --- --- --- --- Max LADD --- 1 .03E-05 --- 2 .22E-04 --- --- 2 .23E-06 --- 1.03E-06 --- 1.68E-06 Max ADR:
ma x acute eco 8.74E-04 --- 1 .06E-02 --- --- --- --- 1.14E-05 --- --- ---

PDM1 --- --- --- --- 1.96E+01 --- --- --- --- --- Max LADD --- 6 .29E-06 --- 1 .35E-04 --- --- 1 .35E-06 --- 6.24E-07 --- --- 1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufacturing (Mfg), Processing (Proc) and Use release activity labels. Multiple release ac tivities are combined in one e xposure scenario if their releas es 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 al l three exposure calculati ons per exposure scenario. CC is the aquatic conc entration of concern. 4 This column displays concentration va lues 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.4/16/10 page of

Results Table: Exposure Based (XB)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Wate r Dose (mg/kg/day) No Yes 3.70E-02 Fish Ingestion Dose (mg/kg/day) No Yes 4.50E-01 Inhalation Dose (mg/kg/day) No No Groundwater Dose (mg/kg/day) No No Surface Water Release After Treatment (kg/yr) No No Total Release After Treatment (kg/yr) No No Consumer Use? No No4/16/10 page of

POST EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:1 Number of Release Sites: Release Activity: Max ADR, PDM 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER:1 RELEASE ACTI VITY: Max ADR, PDM 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 5000.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) CONCENTRATION ( μ g/L) 3.25E-05 1.41E-04 2.31E-04 2.31E-04 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 1.45E-10 mg/kg/day 3.11E-09 mg/kg/day
LADC pot 7.44E-09 mg/L 3.72E-05 mg/kg
Acute
ADR pot 1.18E-08 mg/kg/day 2.92E-07 mg/kg/day

Surface Water Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER: 1 RELEASE ACTI VITY: Max ADR, PDM FACILITY NAME:
FACILITY LOCATION: RECEIVING STREAM NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT NUMBER: GAGING STATION ID: GAGING STATION PERIOD OF RECORD: GAGING STATION NUMBER OF OBSERVATIONS: NUMBER OF STATIONS ON REACH:

MEAN FLOW (MLD): 7q10 FLOW (MLD): EFFLUENT FLOW (MLD):

RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Pre-treatment Loading (kg/site/day) Waste Water Treatment (%)

1.004/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 1 RELEASE ACTIVITY: Max ADR, PDM 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): 4.65E-02 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 10.10 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): 1.76E-02 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 1.53 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) 1.29E-06 3.42E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 7.04E-06 1.86E-05 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 2.81E-04 1. 86E-03 NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER:2 RELEASE ACTIVITY: Max LADD 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 5000.00

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 1.45E-10 mg/kg/day 3.10E-09 mg/kg/day
LADC pot 7.43E-09 mg/L 3.72E-05 mg/kg
Acute
ADR pot N/A mg/kg/day N/A mg/kg/day

Surface Water Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
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): 0.32 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): 0.19 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) 1.37E-05 2. 35E-05 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 7.44E-05 1.28E-04 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:4/16/10 page of

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

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

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:3 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 3 Number of Site s: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: SIC-CODE ( EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg) 0.00 5000.00

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 0.28 0.74 1.18 1.44
ALL 10 9.48 84.09 157.45 157.45

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 2.10E-06 7.23E-05 mg/kg/day 4.50E-05 1.55E-03 mg/kg/day
LADC pot 1.08E-04 3.71E-03 mg/L 0.54 18.53 mg/kg
Acute
ADR pot 6.20E-05 7.03E-03 mg/kg/day 2.47E-03 8.51E-02 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 3 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): 0.12 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 1.50 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): 9.75E-02 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.50 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) 7.17E-06 8.68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.90E-05 4.72E-05 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 9.16E-05 2. 76E-04 NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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

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

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:4 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 0.28 0.74 1.18 1.44
ALL 10 9.48 84.09 157.45 157.45

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 2.10E-06 7.23E-05 mg/kg/day 4.50E-05 1.55E-03 mg/kg/day
LADC pot 1.08E-04 3.71E-03 mg/L 0.54 18.53 mg/kg
Acute
ADR pot 6.20E-05 7.03E-03 mg/kg/day 2.47E-03 8.51E-02 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:5 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 5 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 2.10E-06 7.23E-05 mg/kg/day 4.50E-05 1.55E-03 mg/kg/day
LADC pot 1.08E-04 3.71E-03 mg/L 0.54 18.53 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005

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) 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.56E-05 30.00 75.00 71.80 1.40 LADC pot (mg/L) 7.98E-04 30.00 75.00 NA NA

REMARKS:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 5 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): 0.12 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): 9.75E-02 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) 7.17E-06 8. 68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.90E-05 4.72E-05 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:4/16/10 page of

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

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

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:6 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 6 Number of Site s: RELEASE ACTIVITY: Max ADR 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 5000.00

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 1.45 3.91 6.23 7.56
ALL 10 49.94 443.18 829.79 829.79

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 7.75E-06 2.67E-04 mg/kg/day 1.66E-04 5.72E-03 mg/kg/day
LADC pot 3.97E-04 1.37E-02 mg/L 1.99 68.41 mg/kg
Acute
ADR pot 3.27E-04 3.70E-02 mg/kg/day 1.30E-02 0.45 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 6 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 Con centration (Stack): 0.36 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 2.63 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) 2.65E-05 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 1.44E-04 N/A 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 4.84E-04 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:7 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 1.45 3.91 6.23 7.56
ALL 10 49.94 443.18 829.79 829.79

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 7.75E-06 2.67E-04 mg/kg/day 1.66E-04 5.72E-03 mg/kg/day
LADC pot 3.97E-04 1.37E-02 mg/L 1.99 68.41 mg/kg
Acute
ADR pot 3.27E-04 3.70E-02 mg/kg/day 1.30E-02 0.45 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:8 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 8 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 7.75E-06 2.67E-04 mg/kg/day 1.66E-04 5.72E-03 mg/kg/day
LADC pot 3.97E-04 1.37E-02 mg/L 1.99 68.41 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 8 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) 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 5.74E-05 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.94E-03 30.00 75.00 NA NA

REMARKS:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 8 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 Con centration (Stack): 0.36 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) 2.65E-05 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 1.44E-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:4/16/10 page of

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:9 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 9 Number of Site s: RELEASE ACTIVITY: Max ADR 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 5000.00

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 0.23 0.63 1.01 1.22
ALL 10 8.07 71.59 134.04 134.04

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 2.00E-07 6.89E-06 mg/kg/day 4.29E-06 1.48E-04 mg/kg/day
LADC pot 1.03E-05 3.54E-04 mg/L 5.14E-02 1.77 mg/kg
Acute
ADR pot 5.28E-05 5.98E-03 mg/kg/day 2.11E-03 7.25E-02 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 9 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): 2.28E-02 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 2.60 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): 9.30E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.42 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) 6.84E-07 1.68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.72E-06 9.12E-06 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 7.79E-05 4. 78E-04 NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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

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

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:10 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 10 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 0.23 0.63 1.01 1.22
ALL 10 8.07 71.59 134.04 134.04

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 2.00E-07 6.89E-06 mg/kg/day 4.29E-06 1.48E-04 mg/kg/day
LADC pot 1.03E-05 3.54E-04 mg/L 5.14E-02 1.77 mg/kg
Acute
ADR pot 5.28E-05 5.98E-03 mg/kg/day 2.11E-03 7.25E-02 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 10 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:11 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 11 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 2.23E-02 6.01E-02 9.59E-02 0.12
ALL 10 0.77 6.82 12.77 12.77

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 1.19E-07 4.10E-06 mg/kg/day 2.55E-06 8.79E-05 mg/kg/day
LADC pot 6.11E-06 2.10E-04 mg/L 3.06E-02 1.05 mg/kg
Acute
ADR pot 5.02E-06 5.70E-04 mg/kg/day 2.00E-04 6.90E-03 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 11 RELEASE ACTIVITY: PDM2 SIC CODE DESCRIPTION: 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

1.004/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:12 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 12 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 3.00E-07 1.03E-05 mg/kg/day 6.44E-06 2.22E-04 mg/kg/day
LADC pot 1.54E-05 5.30E-04 mg/L 7.70E-02 2.65 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 12 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) 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 2.23E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.14E-04 30.00 75.00 NA NA

REMARKS:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 12 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): 2.28E-02 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): 1.40E-02 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) 1.03E-06 1. 68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 5.60E-06 9.12E-06 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:4/16/10 page of

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

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

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:13 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 13 Number of S ites: RELEASE ACTIVITY: Max ADR 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 5000.00

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 3.42E-02 9.22E-02 0.15 0.18
ALL 10 1.18 10.45 19.57 19.57

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 1.83E-07 6.29E-06 mg/kg/day 3.92E-06 1.35E-04 mg/kg/day
LADC pot 9.38E-06 3.23E-04 mg/L 4.69E-02 1.61 mg/kg
Acute
ADR pot 7.70E-06 8.74E-04 mg/kg/day 3.07E-04 1.06E-02 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 13 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): 8.49E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 6.20E-02 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) 6.24E-07 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.40E-06 N/A 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.14E-05 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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 m4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:14 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 14 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 3.42E-02 9.22E-02 0.15 0.18
ALL 10 1.18 10.45 19.57 19.57

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 1.83E-07 6.29E-06 mg/kg/day 3.92E-06 1.35E-04 mg/kg/day
LADC pot 9.38E-06 3.23E-04 mg/L 4.69E-02 1.61 mg/kg
Acute
ADR pot 7.70E-06 8.74E-04 mg/kg/day 3.07E-04 1.06E-02 mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 14 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Kwon
ENVIRONMENTAL RELEASES
Scenario#:15 Number of Release Sites: Release Activity: 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:4/16/10 page of

POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 15 Number of S ites: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: SIC-CODE ( EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg) 0.00 5000.00

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 1.83E-07 6.29E-06 mg/kg/day 3.92E-06 1.35E-04 mg/kg/day
LADC pot 9.38E-06 3.23E-04 mg/L 4.69E-02 1.61 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 15 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) 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.35E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 6.95E-05 30.00 75.00 NA NA

REMARKS:4/16/10 page of

POST FOCUS EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 15 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): 8.49E-03 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) 6.24E-07 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.40E-06 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:4/16/10 page of

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 m4/16/10 page of



### POST FOCUS EXPOSURE REPORT
Chemical ID: P-10-0005 Reviewer: Kwon

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 = 1 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

Max ADR, PDM --- --- --- --- --- --- 2.81E-04 --- 1.86E-03 ---

Max LADD --- --- --- --- --- --- --- --- 1.37E-05 --- 2.35E-05

Max ADR:
ma x acute eco --- --- --- --- --- --- --- 9.16E-05 --- 2.76E-04 ---

PDM1 --- --- --- --- --- --- --- --- --- --- Max LADD --- --- --- --- --- --- 1.56E-05 --- 7 .17E-06 --- 8.68E-06 Max ADR:
ma x acute eco --- --- --- --- --- --- --- 4.84E-04 --- --- ---

PDM1 --- --- --- --- --- --- --- --- --- --- Max LADD --- --- --- --- --- --- 5.74E-05 --- 2 .65E-05 --- --- Max ADR:
ma x acute eco --- --- --- --- --- --- --- 7.79E-05 --- 4.78E-04 ---

PDM1 --- --- --- --- --- --- --- --- --- --- PDM2 --- --- --- --- --- --- --- --- --- --- Max LADD --- --- --- --- --- --- 2.23E-06 --- 1 .03E-06 --- 1.68E-06 Max ADR:
ma x acute eco --- --- --- --- --- --- --- 1.14E-05 --- --- ---

PDM1 --- --- --- --- --- --- --- --- --- --- Max LADD --- --- --- --- --- --- 1.35E-06 --- 6 .24E-07 --- --- 1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufacturing (Mfg), Processing (Proc) and Use release activity labels. Multiple release ac tivities are combined in one e xposure scenario if their releas es 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 al l three exposure calculati ons per exposure scenario. CC is the aquatic conc entration of concern. 4 This column displays concentration va lues 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.4/16/10 page of

Results Table: Exposure Based (XB)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Wate r Dose (mg/kg/day) No No Fish Ingestion Dose (mg/kg/day) No No Inhalation Dose (mg/kg/day) No No Groundwater Dose (mg/kg/day) No No Surface Water Release After Treatment (kg/yr) No No Total Release After Treatment (kg/yr) No No Consumer Use? No No4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Sherer
ENVIRONMENTAL RELEASES
Scenario#:1 Number of Release Sites: Release Activity: Max ADR, PDM 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER:1 RELEASE ACTI VITY: Max ADR, PDM 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 5000.00

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 N/A mg/kg/day N/A mg/kg/day
LADC pot N/A mg/L N/A mg/kg
Acute
ADR pot N/A mg/kg/day N/A mg/kg/day

Surface Water Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER: 1 RELEASE ACTI VITY: Max ADR, PDM FACILITY NAME:
FACILITY LOCATION: RECEIVING STREAM NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT NUMBER: GAGING STATION ID: GAGING STATION PERIOD OF RECORD: GAGING STATION NUMBER OF OBSERVATIONS: NUMBER OF STATIONS ON REACH:

MEAN FLOW (MLD): 7q10 FLOW (MLD): EFFLUENT FLOW (MLD):

RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Pre-treatment Loading (kg/site/day) Waste Water Treatment (%)

1.004/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 1 RELEASE ACTIVITY: Max ADR, PDM 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): 4.65E-02 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 10.10 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): 1.76E-02 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 1.53 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) 1.29E-06 3.42E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 7.04E-06 1.86E-05 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 2.81E-04 1. 86E-03 NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER:2 RELEASE ACTIVITY: Max LADD 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 5000.00

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 N/A mg/kg/day N/A mg/kg/day
LADC pot N/A mg/L N/A mg/kg
Acute
ADR pot N/A mg/kg/day N/A mg/kg/day

Surface Water Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
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): 0.32 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): 0.19 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) 1.37E-05 2. 35E-05 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 7.44E-05 1.28E-04 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:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:3 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 3 Number of Site s: RELEASE ACTIVITY: Max ADR 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 3 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): 0.12 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 1.50 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): 9.75E-02 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.50 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) 7.17E-06 8.68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.90E-05 4.72E-05 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 9.16E-05 2. 76E-04 NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:4 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:5 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 5 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005

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 (%)

100.00 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.56E-05 30.00 75.00 71.80 1.40 LADC pot (mg/L) 7.98E-04 30.00 75.00 NA NA

REMARKS:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 5 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): 0.12 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): 9.75E-02 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) 7.17E-06 8. 68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.90E-05 4.72E-05 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:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:6 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 6 Number of Site s: RELEASE ACTIVITY: Max ADR 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 6 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 Con centration (Stack): 0.36 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 2.63 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) 2.65E-05 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 1.44E-04 N/A 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 4.84E-04 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:7 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:8 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 8 Number of Site s: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 8 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 (%)

100.00 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 5.74E-05 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.94E-03 30.00 75.00 NA NA

REMARKS:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 8 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 Con centration (Stack): 0.36 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) 2.65E-05 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 1.44E-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:4/16/10 page of

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:9 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 9 Number of Site s: RELEASE ACTIVITY: Max ADR 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 9 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): 2.28E-02 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 2.60 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): 9.30E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.42 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) 6.84E-07 1.68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.72E-06 9.12E-06 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 7.79E-05 4. 78E-04 NA 1 day 71.80 0.55

Inhalation Comments:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:10 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 10 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 10 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:11 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 11 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 11 RELEASE ACTIVITY: PDM2 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:12 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 12 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 12 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 (%)

100.00 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 2.23E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.14E-04 30.00 75.00 NA NA

REMARKS:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 12 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): 2.28E-02 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): 1.40E-02 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) 1.03E-06 1. 68E-06 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 5.60E-06 9.12E-06 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:4/16/10 page of

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

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

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:13 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 13 Number of S ites: RELEASE ACTIVITY: Max ADR 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

I NITIAL REVIEW EXPOSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 13 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): 8.49E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 6.20E-02 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) 6.24E-07 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.40E-06 N/A 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.14E-05 N/A NA 1 day 71.80 0.554/16/10 page of

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 m4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:14 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 14 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 14 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: 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

1.00 High4/16/10 page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-10-0005 Assessor: Cinalli
ENVIRONMENTAL RELEASES
Scenario#:15 Number of Release Sites: Release Activity: 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:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-10-0005
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 15 Number of S ites: RELEASE ACTIVITY: 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 5000.00

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 N/A N/A mg/kg/day N/A N/A mg/kg/day
LADC pot N/A N/A mg/L N/A N/A mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 15 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 (%)

100.00 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.35E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 6.95E-05 30.00 75.00 NA NA

REMARKS:4/16/10 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-10-0005
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 15 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): 8.49E-03 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) 6.24E-07 N/A 30.00 75.00 71.80 0.55 LADC pot (mg/m 3 ) 3.40E-06 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:4/16/10 page of

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