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### STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-13-0055C Reviewer: Flessner/BC

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 Exceed

ed 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: max acute eco 3.84E-06 --- 5.15E-07 --- 7.86E-02 --- --- 4.60E-02 --- --- ---

Max LADD --- 3.29E-10 --- 2.62E-11 --- --- --- --- 1.57E-03 --- ---

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 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 daily streamflow of the seven consecutive days of lowest flow within a ten year period.

Remarks:2/6/2013 Page 2 of 9

STANDA RD REVI EW EXPOSURE REPORT

Chemical ID: P-13-0055C Assessor: Flessner/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:2/6/2013 Page 3 of 9

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-13-0055C

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

SCENARIO #: 1 Number of Site s: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 18.60

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 2.12E-03 4.93E-03 7.80E-03 9.24E-03

ALL 10 39.60 13.29 7.76 7.57 1.54E-02 4.59E-02 7.86E-02 8.06E-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 4.53E-11 3.29E-10 mg/kg/day 3.61E-12 2.62E-11 mg/kg/day

LADC pot 2.32E-09 1.69E-08 mg/L 4.32E-08 3.14E-07 mg/kg

Acute

ADR pot 4.12E-07 3.84E-06 mg/kg/day 7.08E-08 5.15E-07 mg/kg/day

SIC Code Comments:2/6/2013 Page 4 of 9

STANDA RD REVIEW EXPOSURE REPORT Chemical ID: P-13-0055C

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: k g/site/day Fugitive Release Days per Year: d ays % Removal via Fugitive Release: % Total Fugitive Release: k g/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): 21.30 μg/m 3
Max 24 Hour Average Air Concentration (Stack): 250.00 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) 1.57E-03 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 8.52E-03 N/A 30.00 75.00 NA NA
Acute

ADR pot (mg/kg/day) 4.60E-02 N/A NA 1 day 71.80 0.55

Inhalation Comments:2/6/2013 Page 5 of 9

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 m2/6/2013 Page 6 of 9

STANDA RD REVI EW EXPOSURE REPORT

Chemical ID: P-13-0055C Assessor: Flessner/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:2/6/2013 Page 7 of 9

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-13-0055C

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

SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 18.60

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 4.53E-11 3.29E-10 mg/kg/day 3.61E-12 2.62E-11 mg/kg/day

LADC pot 2.32E-09 1.69E-08 mg/L 4.32E-08 3.14E-07 mg/kg

Acute

ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:2/6/2013 Page 8 of 9

STANDA RD REVIEW EXPOSURE REPORT Chemical ID: P-13-0055C

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: k g/site/day Fugitive Release Days per Year: d ays % Removal via Fugitive Release: % Total Fugitive Release: k g/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): 21.30 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) 1.57E-03 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 8.52E-03 N/A 30.00 75.00 NA NA
Acute

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

Inhalation Comments:2/6/2013 Page 9 of 9

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