9/23/2011 Page 1 of 68



### STANDARD REVIEW EXPOSURE REPORT Chemical ID: P-11-0526 Reviewer: Bevington/BC

Results Table: Dose, Concentration, and Days Exceeded Results Summary

Exposure Scenario 1 Water Landfil l Stack Air Fugitive Air
Drinking Water Fish Ingestion ADR LADD ADR LADD 7Q10 4 CC = 420 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:
ma x acute eco 1.03E-04 --- --- --- 1.69E+00 --- --- 3.20E-01 --- --- ---

Max LADD --- 5.02E-08 --- --- --- --- --- --- 3.51E-04 --- ---

Max ADR:
ma x acute eco 3.87E-02 --- --- --- 8.47E+02 --- --- --- --- --- ---

PDM1 --- --- --- --- 4.48E+01 --- --- --- --- --- Max LADD --- 5.55E-06 --- --- --- --- 2.68E-06 --- --- --- --- Max ADR:
ma x acute eco 3.90E-02 --- --- --- 8.54E+02 --- --- --- --- --- ---

PDM1 --- --- --- --- 5.19E+01 --- --- --- --- --- Max LADD --- 1.08E-05 --- --- --- --- 5.22E-06 --- --- --- --- Max ADR:
ma x acute eco 9.70E-01 --- --- --- 2.12E+04 --- --- --- --- --- ---

PDM1 --- --- --- --- 2.12E+04 --- --- --- --- --- Max LADD --- 1.08E-03 --- --- --- --- --- --- --- --- --- Max ADR:
ma x acute eco 2.58E-04 --- --- --- 5.66E+00 --- --- 1.49E-05 --- 8.79E-06 ---

Max LADD --- 2 .31E-08 --- --- --- --- 2 .65E-07 --- 6 .52E-09 --- 1.31E-07 Max ADR:
ma x acute eco 7.34E-02 --- --- --- 1.61E+03 --- --- 1.06E-03 --- --- ---

Max LADD --- 3 .28E-06 --- --- --- --- 3 .94E-09 --- 2 .33E-07 --- --- Max ADR:
ma x acute eco 7.32E-03 --- --- --- 1.60E+02 --- --- 4.21E-04 --- 8.55E-03 ---

PDM1 --- --- --- --- 1.60E+02 --- --- --- --- --- Max LADD --- 8 .17E-05 --- --- --- --- 3 .94E-05 --- 2 .31E-05 --- 1.88E-04

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufact uring (Mfg), Processing (Proc) and Use release activity labels. Multiple release activities are combined in one exposu re scenario if their releases occur at same location. 3 Exposure calculations are Acute Dose Rate (ADR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution9/23/2011 Page 2 of 68

Model (PDM). There may be one, two, or all three exposure calculations per exposure scenario. CC is the aquatic concentration of concern. 4 This column displays concentration values for the 7Q10 streamflow, which is defined as the average daily streamflow of the seven consecutive days of lowest flow within a ten year period.
Remarks:



### Results Table: Exposure Based (X B)/Persistent (P2B2) Criteria

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



### Fate test recommendations?: (default is NA)9/23/2011 Page 3 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:1 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:9/23/2011 Page 4 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER:1 RELEASE ACTIVITY: Max ADR
FACILITY NAME:
FACILITY LOCATION:
RECEIVING WATER NAME:
REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:
NPDES PERMIT #: EXPOSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) CONCENTRATION ( μ g/L) 0.47 1.24 1.69 2.11 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 5.02E-08 mg/kg/day 0.00 mg/kg/day
LADC pot 2.57E-06 mg/L 0.00 mg/kg
Acute
ADR pot 1.03E-04 mg/kg/day 0.00 mg/kg/day

Surface Water Comments:9/23/2011 Page 5 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 1 RELEASE ACTIVITY: Max ADR
RELEASE DESCRIPTION:
METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: kg/site/day Fugitive Release Days per Year: days % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 μg/m 3

Per Site Stack Release: kg/site/day Stack Release Days per Year: days
% Removal via Stack Release: %
Total Stack Release: kg/yr Max Annual Average Air Con centration (Stack): 4.77 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 1740.00 μg/m 3

ASSUMPTIONS Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 3.51E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.91E-03 N/A 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 0.32 N/A NA 1 day 71.80 0.55

Inhalation Comments:9/23/2011 Page 6 of 68

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 m9/23/2011 Page 7 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 8 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526 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 0.00

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 5.02E-08 mg/kg/day 0.00 mg/kg/day
LADC pot 2.57E-06 mg/L 0.00 mg/kg
Acute
ADR pot N/A mg/kg/day N/A mg/kg/day

Surface Water Comments:9/23/2011 Page 9 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 2 RELEASE ACTIVITY: Max LADD
RELEASE DESCRIPTION:
METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: kg/site/day Fugitive Release Days per Year: days % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 0.00 μg/m 3

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

Per Site Stack Release: kg/site/day Stack Release Days per Year: days
% Removal via Stack Release: %
Total Stack Release: kg/yr Max Annual Average Air Con centration (Stack): 4.77 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) 3.51E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.91E-03 N/A 30.00 75.00 NA NA
Acute
ADR pot

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

Inhalation Comments:9/23/2011 Page 10 of 68

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 m9/23/2011 Page 11 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 12 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 3 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 7.15 20.39 33.49 39.84
ALL 10 11.11 1.94 1.06 0.96 80.78 462.63 846.70 934.90

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 3.05E-07 3.45E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.57E-05 1.77E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.70E-03 3.87E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 13 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 14 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 Number of Site s: RELEASE ACTIVITY: PDM1
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 0.38 1.08 1.77 2.11
ALL 10 11.11 1.94 1.06 0.96 4.28 24.48 44.81 49.48

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 2.02E-07 2.28E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.04E-05 1.17E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 9.02E-05 2.05E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 15 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 RELEASE ACTIVITY: PDM1
SIC CODE DESCRI PTION: POTW's (All facilities)
ASSOCIATED SIC CODES: 4952
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

420.00 High9/23/2011 Page 16 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 17 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 5 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 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 4.91E-07 5.55E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.52E-05 2.85E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:9/23/2011 Page 18 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526

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) 2.68E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.38E-04 30.00 75.00 NA NA

REMARKS:9/23/2011 Page 19 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 20 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 6 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 7.21 20.56 33.77 40.17
ALL 10 11.11 1.94 1.06 0.96 81.46 466.49 853.77 942.71

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 7.70E-07 8.70E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.95E-05 4.46E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.72E-03 3.90E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 21 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 22 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 Number of Site s: RELEASE ACTIVITY: PDM1
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 0.44 1.25 2.05 2.44
ALL 10 11.11 1.94 1.06 0.96 4.95 28.35 51.89 57.29

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 2.34E-07 2.64E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.20E-05 1.36E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.04E-04 2.37E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 23 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 RELEASE ACTIVITY: PDM1
SIC CODE DESCRI PTION: POTW's (All facilities)
ASSOCIATED SIC CODES: 4952
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

420.00 High9/23/2011 Page 24 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 25 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 8 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 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 9.57E-07 1.08E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.91E-05 5.55E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:9/23/2011 Page 26 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526

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) 5.22E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.68E-04 30.00 75.00 NA NA

REMARKS:9/23/2011 Page 27 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 28 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 9 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 179.20 511.13 839.55 998.67
ALL 10 11.11 1.94 1.06 0.96 2025.20 1.16E+04 2.12E+04 2.34E+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 9.57E-05 1.08E-03 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.91E-03 5.55E-02 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 4.27E-02 0.97 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 29 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 30 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 10 Number of S ites: RELEASE ACTIVITY: PDM1
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 179.20 511.13 839.55 998.67
ALL 10 11.11 1.94 1.06 0.96 2025.20 1.16E+04 2.12E+04 2.34E+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 9.57E-05 1.08E-03 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.91E-03 5.55E-02 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 4.27E-02 0.97 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 31 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 10 RELEASE ACTIVITY: PDM1
SIC CODE DESCRI PTION: POTW's (All facilities)
ASSOCIATED SIC CODES: 4952
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

420.00 High9/23/2011 Page 32 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:11 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:9/23/2011 Page 33 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 11 Number of S ites: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 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 9.57E-05 1.08E-03 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.91E-03 5.55E-02 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:9/23/2011 Page 34 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:12 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:9/23/2011 Page 35 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 12 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 4.78E-02 0.14 0.22 0.27
ALL 10 11.11 1.94 1.06 0.96 0.54 3.09 5.66 6.25

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 2.04E-09 2.31E-08 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.05E-07 1.18E-06 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.14E-05 2.58E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 36 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 12 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): 1.78E-03 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 4.78E-02 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): 8.86E-05 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 8.08E-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) 6.52E-09 1.31E-07 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 3.54E-08 7.12E-07 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 1.49E-05 8.79E-06 NA 1 day 71.80 0.55

Inhalation Comments:9/23/2011 Page 37 of 68

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 m9/23/2011 Page 38 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:13 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:9/23/2011 Page 39 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 13 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 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 2.04E-09 2.31E-08 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.05E-07 1.18E-06 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:9/23/2011 Page 40 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 13 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) 2.65E-07 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.36E-05 30.00 75.00 NA NA

REMARKS:9/23/2011 Page 41 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 13 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): 1.78E-03 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): 8.86E-05 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) 6.52E-09 1.31E-07 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 3.54E-08 7.12E-07 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:9/23/2011 Page 42 of 68

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 m9/23/2011 Page 43 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:14 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:9/23/2011 Page 44 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 14 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 13.58 38.72 63.60 75.65
ALL 10 11.11 1.94 1.06 0.96 153.42 878.61 1608.02 1775.52

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 2.90E-07 3.28E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.49E-05 1.68E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.24E-03 7.34E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 45 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 14 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): 3.17E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 5.78 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) 2.33E-07 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.27E-06 N/A 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 1.06E-03 N/A NA 1 day 71.80 0.55

Inhalation Comments:9/23/2011 Page 46 of 68

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 m9/23/2011 Page 47 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
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:9/23/2011 Page 48 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 15 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 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 2.90E-07 3.28E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.49E-05 1.68E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:9/23/2011 Page 49 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526

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) 3.94E-09 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.02E-07 30.00 75.00 NA NA

REMARKS:9/23/2011 Page 50 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
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): 3.17E-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) 2.33E-07 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.27E-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:9/23/2011 Page 51 of 68

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 m9/23/2011 Page 52 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:16 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:9/23/2011 Page 53 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 16 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 1.35 3.86 6.34 7.55
ALL 10 11.11 1.94 1.06 0.96 15.30 87.63 160.38 177.08

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 7.23E-06 8.17E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.71E-04 4.19E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.23E-04 7.32E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 54 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 16 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): 2.55 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 46.50 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 Con centration (Stack): 0.31 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 2.29 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) 2.31E-05 1.88E-04 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.26E-04 1.02E-03 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 4.21E-04 8.55E-03 NA 1 day 71.80 0.55

Inhalation Comments:9/23/2011 Page 55 of 68

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 m9/23/2011 Page 56 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:17 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:9/23/2011 Page 57 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 17 Number of Site s: RELEASE ACTIVITY: PDM1
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 1.35 3.86 6.34 7.55
ALL 10 11.11 1.94 1.06 0.96 15.30 87.63 160.38 177.08

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 7.23E-06 8.17E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.71E-04 4.19E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.23E-04 7.32E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:9/23/2011 Page 58 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 17 RELEASE ACTIVITY: PDM1
SIC CODE DESCRI PTION: POTW's (All facilities)
ASSOCIATED SIC CODES: 4952
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

420.00 High9/23/2011 Page 59 of 68

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0526 Assessor: Wong/BC
ENVIRONMENTAL RELEASES
Scenario#:18 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:9/23/2011 Page 60 of 68

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0526

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 18 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

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

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 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 7.23E-06 8.17E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.71E-04 4.19E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:9/23/2011 Page 61 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 18 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) 3.94E-05 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.02E-03 30.00 75.00 NA NA

REMARKS:9/23/2011 Page 62 of 68

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0526
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 18 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): 2.55 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): 0.31 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) 2.31E-05 1.88E-04 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.26E-04 1.02E-03 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:9/23/2011 Page 63 of 68

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 m9/23/2011 Page 64 of 689/23/2011 Page 65 of 689/23/2011 Page 66 of 689/23/2011 Page 67 of 68

INITIAL REVIEW EX POSURE REPORT

CHEMICAL ID: P-11-05269/23/2011 Page 68 of 68