1/29/2014 Page 1 of 21



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P -14-0234 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 =

24 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/k g/day mg/kg/day mg/kg/day

PROC: Max

ADR: max

acute eco 2.99E

- 04

--- --- --- 6.11E+00

--- --- --- --- --- ---

PROC: PDM1

--- --- --- --- 6.11E+00

--- --- --- --- ---

PROC: Max

LADD --- 4.00E

- 06

--- --- --- --- --- --- --- --- ---

USE: Max

ADR: max

acu te eco 4.78E

- 04

--- --- --- 9.78E+00

--- --- --- --- 3.31E

- 02 ---

USE: PDM1

--- --- --- --- 9.78E+00

--- --- --- --- ---

USE: Max

LADD --- 8.00E

- 06

--- --- --- --- 3.72E

- 03

--- --- --- 7.16E

- 04

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. 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 concent ration 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:1/29/2014 Page 2 of 21

INITIAL REVIEW EXPOSURE REPORT

Che mical ID : P- 14

- 0234 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 1 Number of Release Sites:

Release Activity: PROC: 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:1/29/2014 Page 3 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY: PROC:

Max ADR

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

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 0.28 0.66 1.07 1.30

ALL 10 0.94 3.57 6.11 7.31

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 1.21E

- 06 4.00E

- 06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 6.21E

- 05 2.05E

- 04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 5.56E

- 05 2.99E

- 04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:1/29/2014 Page 4 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P- 14

- 0234

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO # : 1 RELEASE ACTIVITY: PROC: Max ADR

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES:

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

Exceeded Number of

Days COC

Exceeded Release

days/year Loading

(kg/site/day) Waste Water

Treatment (%) High/Av g

Analysis

24.00 High1/29/2014 Page 5 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 2 Number of Release Sites:

Release Activity: PROC: PDM1

Release D escription: 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:1/29/2014 Page 6 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY: PROC:

PDM1

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELE ASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00

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 0.28 0.66 1.07 1.30

ALL 10 0.94 3.57 6.11 7.31

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 1.21E

- 06 4.00E

- 06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 6.21E

- 05 2.05E

- 04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 5.56E

- 05 2.99E

- 04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:1/29/2014 Page 7 of 21

INITIAL RE VIEW EXPOSURE REPORT

Chemical ID: P- 14

- 0234

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO # : 2 RELEASE ACTIVITY: PROC: PDM1

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES:

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

Exceeded Number of

Days COC

Exceeded Release

days/year Loading

(kg/site/day) Waste Water

Treatment (%) High/Avg

Analysis

24.00 High1/29/2014 Page 8 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234 As sessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 3 Number of Release Sites:

Release Activity: PROC: Max LADD

Release Description: WATER LANDFILL

Non

- sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (k g/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:1/29/2014 Page 9 of 21

INITIAL REVIEW EXPOSURE REPOR T

Chemical ID : P- 14

- 0234

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 Number of Sites: RELEASE ACTIVITY: PROC:

Max LADD

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

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 N/A N/A N/A N/A

ALL 10 N/A N/A N/A N/A

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 1.21E

- 06 4.00E

- 06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 6.21E

- 05 2.05E

- 04 mg/L 0.00 0.00 mg/kg

Acute

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

SIC Code Comments:1/29/2014 Page 10 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 4 Number of Re lease Sites:

Release Activity: USE: 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:1/29/2014 Page 11 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 4 Number of Sites: RELEASE ACTIVITY: USE: Max

ADR

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): EXPOSED POPULATION: Adult

WWT

REM OVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

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 0.45 1.06 1.71 2.08

ALL 10 1.50 5.72 9.78 11.70

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

Expos ure Units Drinking Water Results Drinking

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 2.42E

- 06 8.00E

- 06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.24E

- 04 4.10E

- 04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 8.89E

- 05 4.78E

- 04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:1/29/2014 Page 12 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 4 RELEASE ACTIVITY: USE: Max ADR

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

M ax Annual Ave rage Air Concentration

(Fugitive): 9.74 μ g/m 3

Max 24 Hour Average Air

Concentration(Fugitive): 180.00 μ g/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 Concentration (Stack): 0.00 μ g/m 3

Max 24 Hour Average Air Concentration (Stack): 0.00 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) N/A 7.16E

- 04 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 3.90E

- 03 30.00 75.00 NA NA

Acute

ADR pot (mg/kg/day) N/A 3.31E

- 02 NA 1 day 71.80 0.55

Inhalation Comments:1/29/2014 Page 13 of 21

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 Release Height: 3.00 m

Inside Stack

Diameter: 0.10 Length of Release

Opening: 10.00 m

Stack Gas Exit

Velocity: 0.10 Width of Release

Opening: 10.00 m

Stack Gas

Temperature: 293.00

Met eorological 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 m1/29/2014 Page 14 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 5 Number of Release Sites:

Release Activity: USE: PDM1

Releas e 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:1/29/2014 Page 15 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 5 Number of Sites : RELEASE ACTIVITY: USE:

PDM1

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RE LEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

PLANT

TYPE % ILE

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

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic

Mean 30 Q5 7Q10 1Q10

ALL 50 0.45 1.06 1.71 2.08

ALL 10 1.50 5.72 9.78 11.70

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking

Water Units Fish Ingestion Resu lts Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 2.42E

- 06 8.00E

- 06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.24E

- 04 4.10E

- 04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 8.89E

- 05 4.78E

- 04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:1/29/2014 Page 16 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P- 14

- 0234

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO # : 5 RELEASE ACTIVITY: USE: PDM1

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES :

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

Exceeded Number of

Days COC

Exceeded Release

days/year Loading

(kg/site/day) Waste Water

Treatment (%) High/Avg

Analysis

24.00 High1/29/2014 Page 17 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234 As sessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#: 6 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:1/29/2014 Page 18 of 21

INITIAL REVIEW EXPOS URE REPORT

Chemical ID : P- 14

- 0234

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 6 Number of Sites: RELEASE ACTIVITY: USE: Max

LADD

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

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 N/A N/A N/A N/A

ALL 10 N/A N/A N/ A N/A

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 2.42E

- 06 8.00E

- 06 mg/kg/day 0.00 0.00 mg/kg/day

L ADC pot 1.24E

- 04 4.10E

- 04 mg/L 0.00 0.00 mg/kg

Acute

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

SIC Code Comments:1/29/2014 Page 19 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P

- 14

- 0234

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 6 ACTIV ITY: 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)

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 ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) IR

(L/day)

Cancer

LADD pot (mg/kg/day) 3.72E

- 03 30.00 75.00 71.80 1.40

LADC pot (mg/L) 0.19 3 0.00 75.00 NA NA

REMARKS:1/29/2014 Page 20 of 21

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 14

- 0234

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 6 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: days

% Removal via Fugitive Release: %

Total Fugitive Release: kg/yr

M ax Annual Average Air Concentration

(Fugitive ): 9.74 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 Release Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/yr

Max Annual Average Air Concentrati on (Stack): 0.00 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) N/A 7.16E

- 04 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 3.90E

- 03 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:1/29/2014 Page 21 of 21

Stack Parameter Data Fugitive Parameter Data

Stac k Height 10.00 Release Height: 3.00 m

Inside Stack

Diameter: 0.10 Length of Release

Opening: 10.00 m

Stack Gas Exit

Velocity: 0.10 Width of Release

Opening: 10.00 m

Stack Gas

Temperature: 293.00

Meteorological and Terrain Information:

Sur rounding 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 Heig ht: NA m