5/3/2013 Page 1 of 30



### STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Reviewer: Flessner/SD Results Table: Dose, Concentration, and Days Exceeded Results Summary Exposure Scenario 1 Water Landfill Stack Air Fugitive Air

Drinking Water Fish Ingestion ADR LADD ADR LADD 7Q10 4
CC = 600 PDM Days Exceede d 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

Proc1: Max ADR: max acute eco 1.50E-03 --- 2.68E-04 --- 3.07E+01 --- --- --- --- --- ---

Proc1: PDM1 --- --- --- --- 3.07E+01 --- --- --- --- --- Proc1: Max LADD --- 3.08E-06 --- 3 .28E-07 --- --- --- --- --- --- ---

Proc2: Max ADR: max acute eco 3.54E-03 --- 6.66E-04 --- 7.27E+01 --- --- --- --- --- ---

Proc2: Max LADD --- 6.39E-07 --- 6 .79E-08 --- --- --- --- --- --- ---

Use1: Max ADR: max acute eco 1.27E+00 --- 7.64E-02 --- 2.85E+04 --- --- --- --- --- ---

Use1: PDM1 --- --- --- --- 2.85E+04 --- --- --- --- --- Use1: Max LADD --- 9.53E-04 --- 1 .01E-04 --- --- --- --- --- --- ---

Use2: Max ADR: max acute eco 8.31E-04 --- 7.74E-05 --- 1.82E+01 --- --- --- --- --- ---

Use2: PDM1 --- --- --- --- 1.82E+01 --- --- --- --- --- Use2: PDM2 --- --- --- --- 3.11E+00 --- --- --- --- --- Use2: Max LADD --- 3.99E-06 --- 4 .24E-07 --- --- 1.74E-05 --- --- --- ---

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufact uring (Mfg), Processing (Proc) and Use release activity labels. Multiple release activities are combined in one exposu re 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 th ree 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:5/3/2013 Page 2 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: Proc1: 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:5/3/2013 Page 3 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 1 Number of Site s: RELEASE ACTIVITY:Proc1: 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 24.80

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 0.83 1.92 3.04 3.60

ALL 10 39.60 13.29 7.76 7.57 6.01 17.91 30.67 31.44

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 4.24E-07 3.08E-06 mg/kg/day 4.50E-08 3.28E-07 mg/kg/day

LADC pot 2.17E-05 1.58E-04 mg/L 5.39E-04 3.92E-03 mg/kg

Acute

ADR pot 1.61E-04 1.50E-03 mg/kg/day 3.68E-05 2.68E-04 mg/kg/day

SIC Code Comments:5/3/2013 Page 4 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: Proc1: 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:5/3/2013 Page 5 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY:Proc1: PDM1 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 24.80

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 0.83 1.92 3.04 3.60

ALL 10 39.60 13.29 7.76 7.57 6.01 17.91 30.67 31.44

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 4.24E-07 3.08E-06 mg/kg/day 4.50E-08 3.28E-07 mg/kg/day

LADC pot 2.17E-05 1.58E-04 mg/L 5.39E-04 3.92E-03 mg/kg

Acute

ADR pot 1.61E-04 1.50E-03 mg/kg/day 3.68E-05 2.68E-04 mg/kg/day

SIC Code Comments:5/3/2013 Page 6 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: Proc1: PDM1 SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)
ASSOCIATED SIC CODES: Subset of 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

600.00 High5/3/2013 Page 7 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: Release Activity: Proc1: 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:5/3/2013 Page 8 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 3 Number of Site s: RELEASE ACTIVITY:Proc1: Max LADD 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 24.80

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

ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 4.24E-07 3.08E-06 mg/kg/day 4.50E-08 3.28E-07 mg/kg/day

LADC pot 2.17E-05 1.58E-04 mg/L 5.39E-04 3.92E-03 mg/kg

Acute

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

SIC Code Comments:5/3/2013 Page 9 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites: Release Activity: Proc2: 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:5/3/2013 Page 10 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 4 Number of Site s: RELEASE ACTIVITY:Proc2: Max ADR

SIC-CODE DESCRIPTION: SIC-CODE (S): EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 24.80

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 2.45 8.79 14.27 17.26

ALL 10 14.95 42.37 72.70 86.89

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 1.05E-07 6.39E-07 mg/kg/day 1.11E-08 6.79E-08 mg/kg/day

LADC pot 5.37E-06 3.28E-05 mg/L 1.33E-04 8.13E-04 mg/kg

Acute

ADR pot 7.34E-04 3.54E-03 mg/kg/day 1.09E-04 6.66E-04 mg/kg/day

SIC Code Comments:5/3/2013 Page 11 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:5 Number of Release Sites: Release Activity: Proc2: 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:5/3/2013 Page 12 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 5 Number of Site s: RELEASE ACTIVITY:Proc2: Max LADD

SIC-CODE DESCRIPTION: SIC-CODE (S): EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 24.80

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

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

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 1.05E-07 6.39E-07 mg/kg/day 1.11E-08 6.79E-08 mg/kg/day

LADC pot 5.37E-06 3.28E-05 mg/L 1.33E-04 8.13E-04 mg/kg

Acute

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

SIC Code Comments:5/3/2013 Page 13 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:6 Number of Release Sites: Release Activity: Use1: 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:5/3/2013 Page 14 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 6 Number of Sites: RELEASE ACTIVITY:Use1: 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 24.80

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 49.84 134.28 214.16 259.89

ALL 10 1715.75 1.52E+04 2.85E+04 2.85E+04

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 2.77E-05 9.53E-04 mg/kg/day 2.94E-06 1.01E-04 mg/kg/day

LADC pot 1.42E-03 4.89E-02 mg/L 3.52E-02 1.21 mg/kg

Acute

ADR pot 1.12E-02 1.27 mg/kg/day 2.22E-03 7.64E-02 mg/kg/day

SIC Code Comments:5/3/2013 Page 15 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:7 Number of Release Sites: Release Activity: Use1: 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:5/3/2013 Page 16 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 7 Number of Site s: RELEASE ACTIVITY:Use1: 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 24.80

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 49.84 134.28 214.16 259.89

ALL 10 1715.75 1.52E+04 2.85E+04 2.85E+04

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 2.77E-05 9.53E-04 mg/kg/day 2.94E-06 1.01E-04 mg/kg/day

LADC pot 1.42E-03 4.89E-02 mg/L 3.52E-02 1.21 mg/kg

Acute

ADR pot 1.12E-02 1.27 mg/kg/day 2.22E-03 7.64E-02 mg/kg/day

SIC Code Comments:5/3/2013 Page 17 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 7 RELEASE ACTIVITY: Use1: PDM1

SIC CODE DESCRIPTION:

ASSOCIATED SIC CODES:

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

600.00 High5/3/2013 Page 18 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:8 Number of Release Sites: Release Activity: Use1: 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:5/3/2013 Page 19 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 8 Number of Sites: RELEASE ACTIVITY:Use1: 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 24.80

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

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

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 2.77E-05 9.53E-04 mg/kg/day 2.94E-06 1.01E-04 mg/kg/day

LADC pot 1.42E-03 4.89E-02 mg/L 3.52E-02 1.21 mg/kg

Acute

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

SIC Code Comments:5/3/2013 Page 20 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:9 Number of Release Sites: Release Activity: Use2: 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:5/3/2013 Page 21 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 9 Number of Sites: RELEASE ACTIVITY:Use2: Max ADR

SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 24.80

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 0.15 0.44 0.72 0.86

ALL 10 11.11 1.94 1.06 0.96 1.74 9.95 18.21 20.10

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 2.56E-07 2.90E-06 mg/kg/day 2.72E-08 3.08E-07 mg/kg/day

LADC pot 1.31E-05 1.48E-04 mg/L 3.26E-04 3.68E-03 mg/kg

Acute

ADR pot 3.66E-05 8.31E-04 mg/kg/day 6.85E-06 7.74E-05 mg/kg/day

SIC Code Comments:5/3/2013 Page 22 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:10 Number of Release Sites: Release Activity: Use2: 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:5/3/2013 Page 23 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 10 Number of S ites: RELEASE ACTIVITY:Use2: PDM1

SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 24.80

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 0.15 0.44 0.72 0.86

ALL 10 11.11 1.94 1.06 0.96 1.74 9.95 18.21 20.10

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 2.56E-07 2.90E-06 mg/kg/day 2.72E-08 3.08E-07 mg/kg/day

LADC pot 1.31E-05 1.48E-04 mg/L 3.26E-04 3.68E-03 mg/kg

Acute

ADR pot 3.66E-05 8.31E-04 mg/kg/day 6.85E-06 7.74E-05 mg/kg/day

SIC Code Comments:5/3/2013 Page 24 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 10 RELEASE ACTIVITY: Use2: 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

600.00 High5/3/2013 Page 25 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:11 Number of Release Sites: Release Activity: Use2: PDM2 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:5/3/2013 Page 26 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 11 Number of S ites: RELEASE ACTIVITY:Use2: PDM2

SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 24.80

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 2.63E-02 7.50E-02 0.12 0.15

ALL 10 11.11 1.94 1.06 0.96 0.30 1.70 3.11 3.44

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 1.40E-07 1.59E-06 mg/kg/day 1.49E-08 1.69E-07 mg/kg/day

LADC pot 7.20E-06 8.14E-05 mg/L 1.79E-04 2.02E-03 mg/kg

Acute

ADR pot 6.26E-06 1.42E-04 mg/kg/day 1.17E-06 1.32E-05 mg/kg/day

SIC Code Comments:5/3/2013 Page 27 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 11 RELEASE ACTIVITY: Use2: PDM2

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

600.00 High5/3/2013 Page 28 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405 Assessor: Flessner/SD

ENVIRONMENTAL RELEASES

Scenario#:12 Number of Release Sites: Release Activity: Use2: 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:5/3/2013 Page 29 of 30

STANDARD REVIEW EXPOSURE REPORT

Chemical ID: P-12-0405

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

SCENARIO #: 12 Number of Site s: RELEASE ACTIVITY:Use2: Max LADD

SIC-CODE DESCRIPTION: POTW's (All facilities) SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)
0.00 24.80

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 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 IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units 50% 10% 50% 10%

Cancer

LADD pot 3.53E-07 3.99E-06 mg/kg/day 3.75E-08 4.24E-07 mg/kg/day

LADC pot 1.81E-05 2.04E-04 mg/L 4.49E-04 5.07E-03 mg/kg

Acute

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

SIC Code Comments:5/3/2013 Page 30 of 30

STANDARD REVIEW EXPOSURE REPORT Chemical ID: P-12-0405

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 12 ACTIVITY: Use2: 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

ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.74E-05 30.00 75.00 71.80 1.40 LADC pot (mg/L) 8.93E-04 30.00 75.00 NA NA

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