4/22/2015 Pag e 1 of 20



### INITIAL REVIEW ExPOSURE REPORT (IREx R)

Chemical ID: P-15-0386 Reviewer: Bevington/SD

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

E x posure Scenario 1 Water Landfil l Stack Air Fugitive Air

Release activity(ies) 2 ;

e x posure c alculation(s) 3 Drinking Water Fish Ingestion 7Q10 4

CC = 6 PDM

Days

E x ceeded 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

ma x acute eco

--- --- --- --- 7.40E

- 01

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

PDM1

--- --- --- --- 7.40E

- 01

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

ma x acute eco

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

- 01

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

PDM1

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

- 01

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

ma x acute eco

--- --- --- --- 1.09E+00

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

PDM1

--- --- --- --- 1.09E+00

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

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:4/22/2015 Pag e 2 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P

- 15

- 0386 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#: 1 Number of Release Sites:

Release Activity: Ma x 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:

(k g/site/day) (kg/site/day ) (kg/site/day) (kg/site/day)

Remarks:4/22/2015 Pag e 3 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P- 15

- 0386

SI TE

- SPECIFIC HUMAN AND AQUATIC E x POSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 1 RELEASE ACTIVITY: Ma x ADR

FACI LITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: E x POSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 202.00

AQUATIC E x POSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 0.13 0.45 0.74 0.79 NA

DRINKING WATER INGESTION AND FISH INGESTION E x POSURE ESTIMATES

E x posure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Inge stion

Units

Cancer

LADD pot 1.54E

- 07 mg/kg/day 2.25E

- 07 mg/kg/day

LADC pot 1.19E

- 05 mg/L 2.40E

- 03 mg/kg

Acute

ADR pot 1.72E

- 05 mg/kg/day 9.12E

- 05 mg/kg/day

Surface Water Comments:4/22/2015 Pag e 4 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P

- 15

- 0386 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#: 2 Number of Release Sites:

Release Activity: PDM1

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:4/22/2015 Pag e 5 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P- 15

- 0386

SI TE

- SPECIFIC HUMAN AND AQUATIC E x POSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 2 RELEASE ACTIVITY: PDM1

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: E x POSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/k g)

0.00 202.00

AQUATIC E x POSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 0.13 0.45 0.74 0.79 NA

DRINKING WATER INGESTION AND FISH INGESTION E x POSURE ESTIMATES

E x posure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Ingestion

Units

Cancer

LADD pot 1.54E

- 07 mg/kg/day 2.25 E

- 07 mg/kg/day

LADC pot 1.19E

- 05 mg/L 2.40E

- 03 mg/kg

Acute

ADR pot 1.72E

- 05 mg/kg/day 9.12E

- 05 mg/kg/day

Surface Water Comments:4/22/2015 Pag e 6 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID: P- 15

- 0386

SITE

- SPECIFIC HUMAN AND AQUATIC E x POSURES T O SURFACE WATER RELEASES

SCENARIO NUMBER: 2 RELEASE ACTIVITY: PDM1

FACILITY NAME:

FACILITY LOCATION:

RECEIVING STREAM NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE T YPE:

NPDES PERMIT NUMBER: GAGING STATION ID:

GAGING STATION

PERIOD OF RECORD: GAGING STATION

NUMBER OF

OBSERVATIONS: NUMBER OF STATIONS ON

REACH:

50 % ile FLOW (MLD): 10 %ile FLOW (MLD): EFFLUENT FLOW (MLD):

RESULTS

COC (μg/L) Percent of Year

COC E x ceeded Number of Days

COC E x ceeded Release

days/year Pre

- treatment

Loading

(kg/site/day) Waste Water

Treatment (%)

6.004/22/2015 Pag e 7 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P

- 15

- 0386 Assessor : Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#: 3 Number of Release Sites:

Release Activity: Ma x 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:4/22/2015 Pag e 8 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P- 15

- 0386

SI TE

- SPECIFIC HUMAN AND AQUATIC E x POSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 3 RELEASE ACTIVITY: Ma x ADR

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REAC H NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: E x POSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 202.00

AQUATIC E x POSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 5.29E

- 02 0.16 0.27 0.32 NA

DRINKING WATER INGESTION AND FISH INGESTION E x POSURE ESTIMATES

E x posure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Ingestion

Units

Cancer

LADD pot 1.99E

- 07 mg/kg/day 2.90E

- 07 mg/kg/day

LADC pot 1.53E

- 05 mg/L 3.09E

- 03 mg/kg

Acute

ADR pot 6.23E

- 06 mg/kg/day 3.72E

- 05 mg/kg/day

Surface Water Comments:4/22/2015 Pag e 9 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P

- 15

- 0386 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#: 4 Number of Release Sites:

Release Activity: 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:

Pe r Site Release:

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

Remarks:4/22/2015 Pag e 10 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P- 15

- 0386

SI TE

- SPECIFIC HUMAN AND AQUATIC E x POSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 4 RELEASE ACTIVITY: PDM1

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: E x POSED POPULATI ON: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 202.00

AQUATIC E x POSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 5.29E

- 02 0.16 0.27 0.32 NA

DRINKING WATER INGESTION AND FISH INGESTION E x POSURE ESTIMATES

E x posure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Ingestion

Units

Cancer

LADD pot 1.99E

- 07 mg/kg/day 2.90E

- 07 mg/kg/day

LADC pot 1.53E

- 05 mg/L 3.09E

- 03 mg/kg

Acute

ADR pot 6.23E

- 06 mg/kg/day 3.72E

- 05 mg/kg/day

Surface Water Comments:4/22/2015 Pag e 11 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID: P- 15

- 0386

SITE

- SPECIFIC HUMAN AND AQUATIC E x POSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 4 RELEASE ACTIVITY: PDM1

FACILITY NAME:

FACILITY LOCATION:

RECEIVING STREAM NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT NUMBER: GAGING STATION ID:

GAGING STATION

PERIOD OF RECORD: GAGING STATION

N UMBER OF

OBSERVATIONS: NUMBER OF STATIONS ON

REACH:

50 %ile FLOW (MLD): 10 %ile FLOW (MLD): EFFLUENT FLOW (MLD):

RESULTS

COC (μg/L) Percent of Year

COC E x ceeded Number of Days

COC E x ceeded Release

days/year Pre

- treatment

Loading

(kg/site/day) Waste Water

Treatment (%)

6.004/22/2015 Pag e 12 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P

- 15

- 0386 Assesso r: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#: 5 Number of Release Sites:

Release Activity: Ma x ADR

Release Description: WATER LANDFILL

Non

- sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/y r) (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:4/22/2015 Pag e 13 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P- 15 -0386

SIC

- CODE BASED HUMAN AND AQUATIC E x POSURES TO SURFACE WATER RELEASES

SCENARIO #: 5 Number of Sites: RELEASE ACTIVITY:

Ma x ADR

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): E x POSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 202.00

AQUATIC E x 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 2.74E

- 02 7.83E

- 02 0.13 0.15

ALL 10 0.24 0.48 1.09 0.97

DRINKING WATER AND FISH INGESTION E x POSURE ESTIMATES

E x posure Units Drinking Water Results Drinking

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 1.03E

- 07 9.03E

- 07 mg/kg/day 1.51E

- 07 1.32E

- 06 mg/kg/day

LADC pot 7 .95E

- 06 6.95E

- 05 mg/L 1.61E

- 03 1.40E

- 02 mg/kg

Acute

ADR pot 2.97E

- 06 1.82E

- 05 mg/kg/day 1.93E

- 05 1.69E

- 04 mg/kg/day

SIC Code Comments:4/22/2015 Pag e 14 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID: P- 15

- 0386

SIC CODE E x POSURES TO SURFACE WATER RELEA SES

SCENARIO # : 5 RELEASE ACTIVITY: Ma x ADR

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES:

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

E x ceeded Number of

Days COC

E x ceeded Release

days/year Loading

(kg/site/day) Waste Water

Treatment (%) High/Avg

Analysis

6.00 High4/22/2015 Pag e 15 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P

- 15

- 0386 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#: 6 Number of Release Sites:

Release Activity: 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:4/22/2015 Pag e 16 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID : P- 15 -0386

SIC

- CODE BASED HUMAN AND AQUATIC E x POSURES TO S URFACE WATER RELEASES

SCENARIO #: 6 Number of Sites: RELEASE ACTIVITY:

PDM1

SIC

- CODE DESCRIPTION:

SIC

- CODE (S): E x POSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/sit e/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 202.00

AQUATIC E x POSURE ESTIMATES

- SURFACE WATER

PLANT

TYPE % ILE

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

Harmonic

Mean 30Q5 7Q1 0 1Q10 Harmonic

Mean 30Q5 7Q10 1Q10

ALL 50 2.74E

- 02 7.83E

- 02 0.13 0.15

ALL 10 0.24 0.48 1.09 0.97

DRINKING WATER AND FISH INGESTION E x POSURE ESTIMATES

E x posure Units Drinking Water Results Drinki ng

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 1.03E

- 07 9.03E

- 07 mg/kg/day 1.51E

- 07 1.32E

- 06 mg/kg/day

LADC pot 7.95E

- 06 6.95E

- 05 mg/L 1.61E

- 03 1.40E

- 02 mg/kg

Acute

ADR pot 2.97E

- 06 1.82E

- 05 mg/kg/day 1 .93E

- 05 1.69E

- 04 mg/kg/day

SIC Code Comments:4/22/2015 Pag e 17 of 20

INITIAL REVIEW ExPOSURE REPORT

Chemical ID: P- 15

- 0386

SIC CODE E x POSURES TO SURFACE WATER RELEASES

SCENARIO # : 6 RELEASE ACTIVITY: PDM1

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES:

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

E x ceeded Number of

Days COC

E x ceeded Release

days/year Loading

(kg/site/day) Waste Water

Treatment (%) High/Avg

Analysis

6.00 High4/22/2015 Pag e 18 of 204/22/2015 Pag e 19 of 204/22/2015 Pag e 20 of 20