4/29/2015 Page of



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P-15-0411 Reviewer: Tobias/EN

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

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air

Release activity(ies) 2 ;

exposure c alculation(s) 3 Drinking Water Fish Ingestion 7Q10 4

CC = 30 PDM

Days

Exceeded LADD ADR LADD ADR LADD

ADR LADD ADR LADD

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: max

acute eco 1.05E

- 04

--- --- --- 4.92E+00

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

USE: PDM1

--- --- --- --- 4.92E+00

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

USE: Max LADD

--- 3.96E

- 07

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

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 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:4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P

- 15

- 0411 Assessor: Tobias/EN

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/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:4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 15 -0411

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites: RELEAS E ACTIVITY: USE: 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 4.33E

- 02 0.12 0.19 0.23

ALL 10 0.55 2.77 4.92 5.73

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

Expo sure Units Drinking Water Results Drinking

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 3.13E

- 08 3.96E

- 07 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 2.41E

- 06 3.05E

- 05 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 4.58E

- 06 1.05E

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

SIC Code Comments:4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P- 15

- 0411

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO # : 1 RELEASE ACTIVITY: USE: 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/Avg

Analysis

30.00 High4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P

- 15

- 0411 Assessor: Tobias/EN

ENVIRONMENTAL RELEASES

Scenario#: 2 Number of Release Sites:

Release Activity: USE: PDM1

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:4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 15 -0411

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 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

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

AQUATIC EX POSURE 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 4.33E

- 02 0.12 0.19 0.23

ALL 10 0.55 2.77 4.92 5.73

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 3.13E

- 08 3.96E

- 07 mg/kg/day 0.00 0.00 mg /kg/day

LADC pot 2.41E

- 06 3.05E

- 05 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 4.58E

- 06 1.05E

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

SIC Code Comments:4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P- 15

- 0411

SIC CODE EXPOSURES TO SURFACE WATER RE LEASES

SCENARIO # : 2 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) Wast e Water

Treatment (%) High/Avg

Analysis

30.00 High4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P

- 15

- 0411 Assessor: Tobias/EN

ENVIRONMENTAL RELEASES

Scenario#: 3 Number of Release Sites:

Release Ac tivity: 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:4/29/2015 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 15 -0411

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SC ENARIO #: 3 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 3.13E

- 08 3.96E

- 07 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 2.41E

- 06 3.05E

- 05 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: