11/7/2014 Page | 1



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P-15-0026 Reviewer: Wong/SD

Results Table: Dose, Concentration, and Days Exceeded Results Summary Exposure Scenario 1 Water Landfill Stack Air Fugitive Air

Release activity(ies) 2 ; exposure calculation(s) 3 Drinking Water Fish Ingestion 7Q10 4 CC = 32 PDM Days Exceeded LADD ADR LADD ADR LADD ADR LADD ADR LADD

mg/kg/day mg/kg/day mg/kg/day mg/kg/day μ g/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day
PROC: max acute eco --- --- --- --- 8.25E+02 --- --- --- --- --- --- USE: max acute eco --- --- --- --- 1.51E+04 --- --- --- --- --- ---

USE: PDM1 --- --- --- --- 1.51E+04 --- --- --- --- ---

1 Exposure scenario titles consist of release activ ity 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), Life time 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 (X B)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Wate r Dose (mg/kg/day) No NA Fish Ingestion Dose (mg/kg/day) No NA Inhalation Dose (mg/kg/day) No NA Groundwater Dose (mg/kg/day) No NA Surface Water Release After Treatment (kg/yr) No NA Total Release After Treatment (kg/yr) No NA Consumer Use?

Fate test recommendations?: (default is NA)11/7/2014 Page | 2

INITIAL RE VIEW EXPOSURE REPORT

Chemical ID: P-15-0026 Assessor: Wong/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:11/7/2014 Page | 3

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-15-0026

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Site s: RELEASE ACTIVITY:PROC: Max ADR
SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.)
SIC-CODE (S): Subset of 49 52 EXPOSED POPULATION: 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. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 288.00 123.84 78.18 66.05 22.22 51.68 81.86 96.90

ALL 10 39.60 13.29 7.76 7.57 161.62 481.57 824.74 845.44

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 4.35E-06 3.17E-05 mg/kg/day 9.92E-08 7.21E-07 mg/kg/day

LADC pot 3.35E-04 2.44E-03 mg/L 1.06E-03 7.70E-03 mg/kg

Acute

ADR pot 1.96E-03 1.82E-02 mg/kg/day 2.45E-04 1.78E-03 mg/kg/day

SIC Code Comments:11/7/2014 Page | 4

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-15-0026 Assessor: Wong/SD

ENVIRONMENTAL RELEASES

Scenario#:2 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:11/7/2014 Page | 5

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-15-0026

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY:USE: Max ADR

SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EXPOSED POPULATION: 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. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 127.43 363.47 597.01 710.16

ALL 10 11.11 1.94 1.06 0.96 1440.14 8247.42 1.51E+04 1.67E+04

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 9.60E-05 1.09E-03 mg/kg/day 2.19E-06 2.47E-05 mg/kg/day

LADC pot 7.39E-03 8.35E-02 mg/L 2.33E-02 0.26 mg/kg

Acute

ADR pot 1.38E-02 0.31 mg/kg/day 1.40E-03 1.59E-02 mg/kg/day

SIC Code Comments:11/7/2014 Page | 6

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-15-0026 Assessor: Wong/SD

ENVIRONMENTAL RELEASES

Scenario#:3 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:11/7/2014 Page | 7

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-15-0026

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 Number of S ites: RELEASE ACTIVITY:USE: PDM1

SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EXPOSED POPULATION: 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. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 127.43 363.47 597.01 710.16

ALL 10 11.11 1.94 1.06 0.96 1440.14 8247.42 1.51E+04 1.67E+04

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 9.60E-05 1.09E-03 mg/kg/day 2.19E-06 2.47E-05 mg/kg/day

LADC pot 7.39E-03 8.35E-02 mg/L 2.33E-02 0.26 mg/kg

Acute

ADR pot 1.38E-02 0.31 mg/kg/day 1.40E-03 1.59E-02 mg/kg/day

SIC Code Comments:11/7/2014 Page | 8

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P-15-0026

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 RELEASE ACTIVITY: USE: PDM1

SIC CODE DESCRI PTION: POTW's (All facilities)

ASSOCIATED SIC CODES: 4952

SIC CODE RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis

32.00 High