Final November 20, 2009 Page 5 of 31

INITIAL REVIEW EXPOSU RE REPORT (IRExR)

Chemical ID: P100040 Reviewer: Sherer

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 Exceeded 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 μ g/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day max ADR, max Acute Eco , PDM, max LADD 4.84e-05 1.04e-06 1.75e-03 2.23e-05 0.99 37 1.76e-06 1.42e-05 8.09e -07 1.01e-06 2.29e-08

max ADR, max Acute Eco , PDM, max LADD 2.20e-05 6.89e-07 7.94e-04 1.48e-05 0.45 15 7.52e-07 4.34e-06 3.47e -07 1.76e-05 5.63e-07

1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation.
2 Release activities are from engineering report's Manufactur ing (Mfg), Processing (Proc) and Use release activity labels. Multiple release activities are combined in one exposure scenario if their releases occur at same location. 3 Exposure calculations are Acute Dose Rate (ADR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution 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 streamflow of the 7 consecutive days of lowest flow within a 10 year period.

Remarks:

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?

Fate test recommendations?: (default is NA)Final November 20, 2009 Page 6 of 31

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P100040w Assessor: Sherer

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: max ADR, max acute eco, PDM, 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:Final November 20, 2009 Page 7 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040w

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites RELEASE ACTIVITY: max ADR, max acute eco, PDM, max LADD
SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.)
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)

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 50 288.00 123.84 78.18 66.05 2.67E-02 6.22E-02 9.85E-02 0.12

ALL 10 39.60 13.29 7.76 7.57 0.19 0.58 0.99 1.02

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 1.43E-07 1.04E-06 mg/kg/day 3.06E-06 2.23E-05 mg/kg/day

LADC pot 7.32E-06 5.33E-05 mg/L 3.66E-02 0.27 mg/kg

Acute

ADR pot 5.20E-06 4.84E-05 mg/kg/day 2.40E-04 1.75E-03 mg/kg/day

SIC Code Comments:Final November 20, 2009 Page 8 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040w

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 RELEASE ACTIVITY: max ADR, max acute eco, PDM, max LADD
SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)

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

1.00 10 37 High

REMARK: The concentration of concern (COC) is exceeded 20 or more days per year.Final November 20, 2009 Page 9 of 31

INITIAL EXPOSURE REVIEW REPORT

Chemical ID: P100040w

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 1 ACTIVITY: : max ADR, max acute eco, PDM, 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 (%)

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) 1.76E-06 30.00 75.00 71.80 1.40
LADC pot (mg/L) 9.03E-05 30.00 75.00 NA NA

REMARKS:Final November 20, 2009 Page 10 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040w

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY: ma x ADR, max acute eco, PDM, max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

Number of Sites:
Per Site Fugitive Release:
Fugitive Release Days per Year:
% Removal via Fugitive Release:
Total Fugitive Release:
Max Annual Average Air Concentration (Fugitive): 3.11E-04 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 5.47E-03 μg/m 3

Per Site Stack Release: kg/site/day
Stack Release Days per Year:

% Removal via Stack Release: %

Total Stack Release: kg/yr
Max Annual Average Air Concen tration (Stack): 1.10E-02 μg/m 3
Max 24 Hour Average Air Concentration (Stack): 7.74E-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) 8.09E-07 2. 29E-08 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 4.40E-06 1.24E-07 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) 1.42E-05 1. 01E-06 NA 1 day 71.80 0.55

Inhalation Comments:Final November 20, 2009 Page 11 of 31

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 mFinal November 20, 2009 Page 12 of 31

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P100040w Assessor:

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: max ADR, max acute eco, PDM, 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:Final November 20, 2009 Page 13 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040w

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY max ADR, max acute eco, PDM, max LADD
SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.)
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)

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 50 288.00 123.84 78.18 66.05 1.22E-02 2.83E-02 4.48E-02 5.30E-02

ALL 10 39.60 13.29 7.76 7.57 8.84E-02 0.26 0.45 0.46

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 9.48E-08 6.89E-07 mg/kg/day 2.03E-06 1.48E-05 mg/kg/day

LADC pot 4.86E-06 3.54E-05 mg/L 2.43E-02 0.18 mg/kg

Acute

ADR pot 2.36E-06 2.20E-05 mg/kg/day 1.09E-04 7.94E-04 mg/kg/day

SIC Code Comments:November 20, 2009 Page 14 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040w

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: max ADR, max acute eco, PDM, max LADD
SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)

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

1.00 4 15 HighNovember 20, 2009 Page 15 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040w

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 2 ACTIVITY: max ADR, max acute eco, PDM, 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 (%)

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) 7.52E-07 30.00 75.00 71.80 1.40
LADC pot (mg/L) 3.86E-05 30.00 75.00 NA NA

REMARKS:November 20, 2009 Page 16 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040w

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY: max ADR, max acute eco, PDM, 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): 7.65E-03 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 9.57E-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): 4.72E-03 μg/m 3
Max 24 Hour Average Air Concentration (Stack): 2.36E-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) 3.47E-07 5. 63E-07 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 1.89E-06 3.06E-06 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) 4.34E-06 1. 76E-05 NA 1 day 71.80 0.55

Inhalation Comments:November 20, 2009 Page 17 of 31

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 mNovember 20, 2009 Page 18 of 31

INITIAL REVIEW EXPOSU RE REPORT (IRExR)

Chemical ID: P100040s Reviewer: Sherer

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=? PDM Days Exceeded 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 μ g/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day max ADR, max Acute Eco , PDM, max LADD --- --- --- --- --- --- 1.74e-06 1.42e-05 8.09e -07 1.01e-06 2.29e-08

max ADR, max Acute Eco , PDM, max LADD --- --- --- --- --- --- 7.52e-07 4.34e-06 3.47e -07 1.76e-05 5.63e-07

1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation.
2 Release activities are from engineering report's Manufactur ing (Mfg), Processing (Proc) and Use release activity labels. Multiple release activities are combined in one exposure scenario if their releases occur at same location. 3 Exposure calculations are Acute Dose Rate (ADR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution 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 streamflow of the 7 consecutive days of lowest flow within a 10 year period.

Remarks:

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?

Fate test recommendations?: (default is NA)November 20, 2009 Page 19 of 31

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P100040s Assessor: Sherer

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: max ADR, max acute eco, PDM, 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:November 20, 2009 Page 20 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040s

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY: max ADR, max acute eco, PDM, max LADD
SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.)
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)

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 50 288.00 123.84 78.18 66.05 0.00 0.00 0.00 0.00

ALL 10 39.60 13.29 7.76 7.57 0.00 0.00 0.00 0.00

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 0.00 0.00 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 0.00 0.00 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 0.00 0.00 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:November 20, 2009 Page 21 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040s

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 RELEASE ACTIVITY max ADR, max acute eco, PDM, max LADD
SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)

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

1.00 0 0 HighNovember 20, 2009 Page 22 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040s

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 1 ACTIVITY: : max ADR, max acute eco, PDM, 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 (%)

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) 1.74E-06 30.00 75.00 71.80 1.40
LADC pot (mg/L) 8.92E-05 30.00 75.00 NA NA

REMARKS:November 20, 2009 Page 23 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040s

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY : ma x ADR, max acute eco, PDM, 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): 3.11E-04 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 5.47E-03 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): 1.10E-02 μg/m 3
Max 24 Hour Average Air Concentration (Stack): 7.74E-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) 8.09E-07 2. 29E-08 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 4.40E-06 1.24E-07 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) 1.42E-05 1. 01E-06 NA 1 day 71.80 0.55

Inhalation Comments:November 20, 2009 Page 24 of 31

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 mNovember 20, 2009 Page 25 of 31

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P100040s Assessor:

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: max ADR, max acute eco, PDM, 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:November 20, 2009 Page 26 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040s

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY: max ADR, max acute eco, PDM, max LADD
SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.)
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)

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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A

ALL 10 39.60 13.29 7.76 7.57 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:November 20, 2009 Page 27 of 31

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P100040s

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: max ADR, max acute eco, PDM, max LADD
SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)

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

1.00 0 0November 20, 2009 Page 28 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040s

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 2 ACTIVITY: max ADR, max acute eco, PDM, 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 (%)

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) 7.52E-07 30.00 75.00 71.80 1.40
LADC pot (mg/L) 3.86E-05 30.00 75.00 NA NA

REMARKS:November 20, 2009 Page 29 of 31

INITIAL EXPOSURE REVIEW REPORT Chemical ID: P100040s

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY: max ADR, max acute eco, PDM, 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): 7.65E-03 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 9.56E-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): 4.72E-03 μg/m 3
Max 24 Hour Average Air Concentration (Stack): 2.36E-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) 3.47E-07 5. 63E-07 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 1.89E-06 3.06E-06 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) 4.34E-06 1. 76E-05 NA 1 day 71.80 0.55

Inhalation Comments:November 20, 2009 Page 30 of 31

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 mNovember 20, 2009 Page 31 of 31



## LEGEND FOR NEW CHEMICAL S EXPOSURE REPORT

This new chemicals exposure report wa s prepared by the Exposure Assessment Branch (EAB) of the Economics, Exposure and Technology Division, Office of Pollution Prevention and Toxics, USEPA.

The goals of these reports are to calcula te conservative (protective) estimates of exposure endpoints for consumers, the general population, and the environment.

For each exposure scenario to industrial releases, the following three endpoints are calculated: (1) maximum possible acute concentrations and doses (2) maximum possible chronic concentrations and doses (3) for water releases ≥ 20 days, the probability of exceedence of the aquatic concentration of concern These endpoints are identified by abbreviati ons on the Release Activity line, e.g., (1) max ADR , (2) max LADD , (3) max PDM . Depending on the release inputs, these e ndpoints may be calculated and presented on the same page or different pages. That is, a release activity ID of mfg; max ADR, max PDM, max LADD indicates that all the exposure endpoints were cal culated from common manufacturing release values; conversely, a release activity ID of mfg &proc; max ADR indicates that only the maximum acute exposure values were calculated for manufacturing and proce ssing releases that occurred at the same site.

For each consumer product use exposure scenario, whether exposure is to the user directly or to the general population/environment, the maximum exposure values are calculated and presented together.

In addition to the exposure values above, EPA policy dir ects that exposure and release values be compared to criteria threshold values for Exposure-based and PBT Exposure-based cases.

Exposure-based (YX) cases (those with ≥ 100,000 kg/yr production volume) Criteria are exceeded under the following conditions: Presence in consumer product with likely exposure ≥ 3E-3 mg/kg/d exposure via air, fish ingestion or drinking water ≥ 10,000 kg/yr release to environment (post-treatment) ≥ 1,000 kg/yr release to water (post-treatment)
Persistent, Bioaccumulative, Toxic (PBT) chemical s of P2B2 rating or hi gher and production volume ≥ 20,000 kg/yr Criteria are exceeded as for YX cases, with the following differences: ≥ 2,000 kg/yr release to environment (post-treatment) ≥ 200 kg/yr release to water (post-treatment)

Bolding rules in the Report: Values for endpoints above th at are also health or eco concerns are bolded.