7/17/2013 Page 1 of 13



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P -13-0646 Reviewer: Kwon/SD

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 =

1000 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 μg/l # Days mg/kg/day mg/kg/day mg/ kg/day mg/kg/day mg/kg/day

Max

ADR --- --- --- --- --- --- --- 7.00E

- 03

--- --- ---

Max

LADD --- --- --- --- --- --- --- --- 1.21E

- 04

--- ---

Max

ADR --- --- --- --- --- --- --- 7.34E

- 03

--- --- ---

Max

LADD --- --- --- --- --- --- --- --- 3.85E

- 05

--- ---

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation.

2 Release activities are from engineering report's Manufacturing (Mfg), Processing (Proc) and Use release activity

labels.

Mu ltiple 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 daily

streamflow

of the seven consecutive d ays of lowest flow within a ten year period.

Remarks:



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

Parameter Exp Based Persistent Exceedance Value

Drinking (Surface) Water Dose (mg/kg/day) NA No

Fish Ingestion Dose (mg/kg/day) NA N o

Inhalation Dose (mg/kg/day) NA No

Groundwater Dose (mg/kg/day) NA No

Surface Water Release After Treatment (kg/yr) NA

Total Release After Treatment (kg/yr) NA

Consumer Use? No

Fate test recommendations?: (default is NA)7/17/2013 Page 2 of 13

INITIAL REVIE W EXPOSURE REPORT

Chemical ID : P- 13

- 0646 Assessor: Kwon/SD

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:7/17/2013 Page 3 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY: Max ADR

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

Num ber 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 μ g/m 3

Max 24 Hour Average Air

Concentration(Fugitive): 0.00 μ g/m 3

Per Site Stack Release: k g/site/day

Stack Release Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/ yr

Max Annual Average Air Concentration (Stack): 1.65 μ g/m 3

Max 24 Hour Average Air Concentration (Stack): 38.10 μ g/m 3

Exposure Units Results

(Stack) Results

(Fugitive) ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) Inh. Rate

(m 3 /hr)

Cancer

LADD pot (mg/kg/day) 1.21E

- 04 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 6.60E

- 04 N/A 30.00 75.00 NA NA

Acute

ADR pot (mg/kg/day) 7.00E

- 03 N/A NA 1 day 71.80 0.55

Inhalation Comments:7/17/2013 Page 4 of 13

Stack Parameter Data Fugitive Parameter Data

Stack Hei ght 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:

Surround ing 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 m7/17/2013 Page 5 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646 Assessor: Kwon/SD

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:7/17/2013 Page 6 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY: Max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULA TION: 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 μ g/m 3

Max 24 Hour Average Air

Concentration(Fugitive): N/A μ g/m 3

Per Site Stack Release: k g/site/day

Stack Release Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/ yr

Max Annual Average Air Concen tration (Stack): 1.65 μ g/m 3

Max 24 Hour Average Air Concentration (Stack): N/A μ g/m 3

Exposure Units Results

(Stack) Results

(Fugitive) ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) Inh. Rate

(m 3 /hr)

Cancer

LADD pot (mg/kg/day) 1.21E

- 04 N/A 30.00 7 5.00 71.80 0.55

LADC pot (mg/m 3 ) 6.60E

- 04 N/A 30.00 75.00 NA NA

Acute

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

Inhalation Comments:7/17/2013 Page 7 of 13

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 m7/17/2013 Page 8 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646 Assessor: Kwon/SD

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:7/17/2013 Page 9 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 3 RELEASE ACTIVITY: Max ADR

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSE D 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

(Fug itive): 0.00 μ g/m 3

Max 24 Hour Average Air

Concentration(Fugitive): 0.00 μ g/m 3

Per Site Stack Release: k g/site/day

Stack Release Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/ yr

Max Annual Average Air Concentration (Stack): 0.52 μ g/m 3

Max 24 Hour Average Air Concentration (Stack): 39.90 μ g/m 3

Exposure Units Results

(Stack) Results

(Fugitive) ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) Inh. Rate

(m 3 /hr)

Cancer

LADD pot (mg/kg/day) 3.85E

- 05 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 2.10E

- 04 N/A 30.00 75.00 NA NA

Acute

ADR pot (mg/kg/day) 7.34E

- 03 N/A NA 1 day 71.80 0.55

Inhalation Comments:7/17/2013 Page 10 of 13

Stack Parameter Data Fugiti ve 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 Ter rain 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 Widt h: NA m

Facility Height: NA m7/17/2013 Page 11 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 4 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:7/17/2013 Page 12 of 13

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0646

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 4 RELEASE ACTIVITY: Max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULAT ION: 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 Ai r Concentration

(Fugitive): 0.00 μ g/m 3

Max 24 Hour Average Air

Concentration(Fugitive): N/A μ g/m 3

Per Site Stack Release: k g/site/day

Stack Release Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/ yr

Max Annual Average Air Concentration (Stack): 0.52 μ g/m 3

Max 24 Hour Average Air Concentration (Stack): N/A μ g/m 3

Exposure Units Results

(Stack) Results

(Fugitive) ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) Inh. Rate

(m 3 /hr)

Cancer

LADD pot (m g/kg/day) 3.85E

- 05 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 2.10E

- 04 N/A 30.00 75.00 NA NA

Acute

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

Inhalation Comments:7/17/2013 Page 13 of 13

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

Meteorolo gical 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