4/4/11 page of



### INITIAL REVIEW EXPOSURE REPORT (IRExR)
Chemical ID: P-11-0224 Reviewer: Delpire/SS

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

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air Drinking Water Fish Ingestion ADR LADD ADR LADD 7Q10 4
CC = 9 PDM Days Exceede d LADD ADR LADD ADR LADD

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

PROC+USE: Max ADR --- --- 1 .08E-04 --- 6.22 --- --- 0.11 --- 0.14 ---
PROC+USE: PDM1 --- --- --- --- 6.22 --- --- --- --- --- --- PROC+USE: PDM2 --- --- --- --- 0.10 --- --- --- --- --- --- PROC+USE: Max LADD --- --- --- 9.38E-07 --- --- 2.23E-03 --- 1 .38E-03 --- 3.11E-03

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manuf acturing (Mfg), Processing (Proc) and Use release activity labels.Multiple release activities are combined in one exposure scenario if their releases occur at same location. 3 Exposure calculations are Acute Dose Rate (A DR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution Model (PDM). Th ere may be one, two, or all three exposure calculations per exposure scenario.CC is the aquatic concentration of concern. 4 This column displays concentration values for the 7Q 10 streamflow, which is defined as the average daily streamflow of the seven consecutive days of lowest flow within a ten year period.

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

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Wate r Dose (mg/kg/day) No NA Fish Ingestion Dose (mg/kg/day) No NA Inhalation Dose (mg/kg/day) Yes NA 0.14 Groundwater Dose (mg/kg/day) No NA Surface Water Release After Treatment (kg/yr) No NA Total Release After Treatment (kg/yr) Consumer Use? No NA4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-11-0224 Assessor: Delpire/SS

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: PROC+USE: Max ADR Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr:

Per Site Release: (kg /site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

CHEMICAL ID: P-11-0224

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS SCENARIO #: 1 RELEASE ACTIVITY: PROC+USE: 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 PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

9.70

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 6.22 CHRONIC SCENARIO 6.22

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 9.23E-07 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 1.10E-02 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.08E-04 NA 1 day 71.80 129.00 Lakes Comments:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0224

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE AC TIVITY:PROC+USE: Max ADR

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: kg/site/day Fugitive Release Days per Year: days % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 28.30 μg/ m 3

Max 24 Hour Average Air Concentration(Fugitive): 770.00 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): 0.33 μg/m 3
Max 24 Hour Average Air Concentration (Stack): 600.00 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) 2.43E-05 2.08E-03 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.32E-04 1. 13E-02 30.00 75.00 NA NA
Acute
ADR pot

(mg/kg/day) 0.11 0.14 NA 1 day 71.80 0.55

Inhalation Comments:4/4/11 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

Do wnwash Information:

Facility Length: NA m Facility Width: NA m Facility Height: NA m4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-11-0224 Assessor: Delpire/SS

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: PROC+USE: PDM1 Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr:

Per Site Release: (kg /site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

CHEMICAL ID: P-11-0224

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS SCENARIO #: 2 RELEASE ACTIVITY: PROC+USE: PDM1 FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

9.70

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 6.22 CHRONIC SCENARIO 6.22

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 9.23E-07 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 1.10E-02 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.08E-04 NA 1 day 71.80 129.00 Lakes Comments:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-11-0224 Assessor: Delpire/SS

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: Release Activity: PROC+USE: PDM2 Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr:

Per Site Release: (kg /site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

CHEMICAL ID: P-11-0224

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS SCENARIO #: 3 RELEASE ACTIVITY: PROC+USE: PDM2 FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

9.70

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 0.10 CHRONIC SCENARIO 0.10

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 2.97E-08 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 3.56E-04 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.75E-06 NA 1 day 71.80 129.00 Lakes Comments:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-11-0224 Assessor: Delpire/SS

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites: Release Activity: PROC+USE: Max LADD Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr:

Per Site Release: (kg /site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT

CHEMICAL ID: P-11-0224

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS SCENARIO #: 4 RELEASE ACTIVITY: PROC+USE: 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 PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

9.70

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 1056.01 CHRONIC SCENARIO 1056.01

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 9.38E-07 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 1.12E-02 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) N/A NA 1 day 71.80 129.00 Lakes Comments:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0224

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 4 ACTIVITY: PROC+USE: Max LADD

RELEASE DESCRIPTION:
EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negl igible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4. 5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2. 5 7. 55E-5

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 2.23E-03 30.00 75.00 71.80 1.40 LADC pot (mg/L) 0.11 30.00 75.00 NA NA

REMARKS:4/4/11 page of

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0224

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 4 RELEASE ACTIVITY:PROC+USE: Max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3
EXPOSED POPULATION: Adult

Number of Sites: Per Site Fugitive Release: kg/site/day Fugitive Release Days per Year: days % Removal via Fugitive Release: % Total Fugitive Release: kg/yr Max Annual Average Air Concentration (Fugitive): 42.30 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): 18.70 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) 1.38E-03 3.11E-03 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 7.48E-03 1. 69E-02 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:4/4/11 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

Do wnwash Information:

Facility Length: NA m Facility Width: NA m Facility Height: NA m