3/13/2013 Page 1 of 10



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P -13-0292 Reviewer: Kwon/SD

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 =

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

Use: Max

ADR 9.35E+00

--- 1.10E

- 01

--- --- --- --- 2.70E

- 01

--- --- ---

Use: Max

LADD --- 6.27E

- 02

--- 8.49E

- 04

--- --- 1.92E

- 02

--- 8.82E

- 03

--- ---

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

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

labels. Multiple release activities are combined in one exposure scenario if their releases occur at same locati on.

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:



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

Parameter Exp Based Persistent Exceedance Value

Drinking (Surface) Water Dose (mg/kg/day) Yes NA 6.27E

- 02

Fish Ingestion Dose (mg/kg/day) No NA

Inhalation Dose (mg/kg/day) Yes NA 8.82E

- 03

Groundwater Dose (mg/kg/day) Yes NA 1.92E

- 02

Surfac e Water Release After Treatment (kg/yr) NA

Total Release After Treatment (kg/yr) NA

Consumer Use? No



### Fate test recommendations?: (default is NA)3/13/2013 Page 2 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0292 Assessor: Kwo n/SD

ENVIRONMENTAL RELEASES

Scenario#: 1 Number of Release Sites:

Release Activity: Use: Max ADR

Release Description: WATER LANDFILL

Non

- sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/yr) (kg/y r) (kg/yr)

Non

- sludge/Sludge

Release Days/yr:

Per Site Release:

(kg/site/day) (kg/site/day ) (kg/site/day) (kg/site/day)

Remarks:3/13/2013 Page 3 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0292

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY: Use: Max

ADR

SIC

- CODE DESCRIPTION: POTW's (All facilities)

SIC

- CODE (S): 4952 EXPOSED POPULATI ON: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 3.16

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

PLANT

TYPE % ILE

FACILITY STREAM FLOW (MLD) STREAM CONC. (μg/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic

Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 1728.26 4929.58 8097.01 9631.60

ALL 10 11.11 1.94 1.06 0.96 1.95E+04 1.12E+05 2.05E+05 2.26E+05

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 3.69E

- 05 4.17E

- 04 mg/kg/day 5.00E

- 07 5.65E

- 06 mg/kg/day

LADC pot 1.89E

- 03 2 .14E

- 02 mg/L 5.98E

- 03 6.76E

- 02 mg/kg

Acute

ADR pot 0.41 9.35 mg/kg/day 9.81E

- 03 0.11 mg/kg/day

SIC Code Comments:3/13/2013 Page 4 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0292

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY: 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: %

Tot al 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: kg/site/day

Stack Release Days per Year: days

% Removal via Sta ck Release: %

Total Stack Release: kg/yr

Max Annual Average Air Concentration (Stack): 0.80 μ g/m 3

Max 24 Hour Average Air Concentration (Stack): 1460.00 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) 5.89E

- 05 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 3.20E

- 04 N/A 30.00 75.00 NA NA

Acute

ADR pot (mg/kg/day) 0.27 N/A NA 1 day 71.80 0.55

Inhalation Comments:3/13/2013 Page 5 of 10

Stack Para meter 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 m3/13/2013 Page 6 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0292 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 2 Number of Release Sites :

Release Activity: Use: 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:3/13/2013 Page 7 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0292

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY: Use: Max

LADD

SIC

- CODE DESCRIPTION: POTW's (All facilities)

SIC

- CODE (S): 4952 EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEA SE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 3.16

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

PLANT

TYPE % ILE

FACILITY STREAM FLOW (MLD) STREAM CONC. (μg/l)

Harmonic

Mean 30 Q5 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 INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking

Water Unit s Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 5.55E

- 03 6.27E

- 02 mg/kg/day 7.51E

- 05 8.49E

- 04 mg/kg/day

LADC pot 0.28 3.22 mg/L 0.90 10.16 mg/kg

Acute

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

SIC Code Comments:3/13/2013 Page 8 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P

- 13

- 0292

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 2 ACTIVITY: Use: Max LADD

RELEASE DESCRIPTION:

EXPOSED POPULATION: Adult

NUMBER

OF

SITES NON

- SLUDGE

LANDFILL

RELEASE A ND

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 Conc entration (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

Exposure Units Results ASSUMP TIONS

ED

(years) AT

(years) BW

(kg) IR

(L/day)

Cancer

LADD pot (mg/kg/day) 1.92E

- 02 30.00 75.00 71.80 1.40

LADC pot (mg/L) 0.98 30.00 75.00 NA NA

REMARKS:3/13/2013 Page 9 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 13

- 0292

INHALATION EXPOSURE ESTIMATES (PO ST

- TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY: 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: da ys

% 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: kg/site/day

Stack Rel ease Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/yr

Max Annual Average Air Concentration (Stack): 120.00 μ g/m 3

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

Exposure Units Results

(Stac k) Results

(Fugitive) ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) Inh. Rate

(m 3 /hr)

Cancer

LADD pot (mg/kg/day) 8.82E

- 03 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 4.80E

- 02 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:3/13/2013 Page 10 of 10

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

Meteor ological Class: Full

Stability Class: NA

Wind Speed: NA

Downwash Information:

Facility Length: NA m

Facility Width: NA m

Facility Height: NA m