12/10/08 Page of

INITIAL REVIEW EXPOSU RE REPORT (IRExR)

Chemical ID: S090001 Reviewer: Cinalli
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 CC=600 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 μ g/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day PROC1: max acute

eco --- --- --- --- 103.09 --- --- --- --- --- --- PROC2: max acute

eco --- --- --- --- 33.51 --- --- --- --- --- ---
PROC2: max PDM --- --- --- --- 19.33 --- --- --- --- ---
PROC3: max PDM --- --- --- --- 3.87 --- --- --- --- --- PROC4: max acute

eco --- --- --- --- 104.38 --- --- --- --- --- ---
USE1: max PDM1 --- --- --- --- 579.55 --- --- --- --- ---

USE1: max PDM2 --- --- --- --- 462.12 --- --- --- --- ---

USE2: max PDM --- --- --- --- 0.24 --- --- --- --- ---

USE3: max acute eco --- --- --- --- 300 --- --- --- --- --- ---

USE3: max PDM --- --- --- --- 7.55 --- --- --- --- ---
1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufactur ing (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.

Remarks:
Fate test recommendations?: (default is NA)12/10/08 Page of

INITIAL REVIEW EXPOSU RE REPORT (IRExR)

Summary Table: Endpoints assessed
Endpoints-Assessed Table Reasons for not assessing releases

Endpoints/Assessment Cycles 1 Releases Assessed in NCEM2? No XB Testing Required No Hazard Concern No Releases Release Below Acute Threshold 5 Release Below Chronic Threshold 5 Other

Ingestion Surface water N NA X NA NA Ground water (landfill) N NA X NA Consumer Use: DtD 2 N NA NA NA NA No Consumer use Inhalation Air: incineration (stack) N NA X X Air: fugitive N NA X X Consumer Use: CEM 3 N NA NA NA NA No Consumer use Dermal Consumer Use: CEM N NA NA NA NA No Consumer use Eco Surface water: ADR conc and/or PDM 4 Y NA NA NA

Consumer Use: DtD N NA NA NA NA No Consumer use

1 Assessment cycles are endpoint concentrations and dose calculations within the NCEM2 model. 2 Down-the-Drain Module 3 Consumer Exposure Module 4 Probabilistic Dilution Model 5 The threshold values for assessing endpoints are 1 mg/day for acute doses and 1 mg/year for chronic doses.

Remarks:12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor: Cinalli

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: PROC1: max acute eco
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 1 Number of Site s: RELEASE ACTIVITY:PROC1: max acute eco SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) 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 0.00

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 2.78 6.46 10.23 12.11

ALL 10 39.60 13.29 7.76 7.57 20.20 60.20 103.09 105.68

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 1.13E-06 8.20E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 5.78E-05 4.21E-04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 5.40E-04 5.03E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: Release Activity: PROC2: max acute eco
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 2 Number of Site s: RELEASE ACTIVITY:PROC2: max acute eco SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) 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 0.00

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 0.90 2.10 3.33 3.94

ALL 10 39.60 13.29 7.76 7.57 6.57 19.56 33.51 34.35

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 2.51E-07 1.82E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.29E-05 9.35E-05 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.75E-04 1.63E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: Release Activity: PROC2: max PDM
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 3 Number of Site s: RELEASE ACTIVITY:PROC2: max PDM SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) 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 0.00

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 0.52 1.21 1.92 2.27

ALL 10 39.60 13.29 7.76 7.57 3.79 11.29 19.33 19.82

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 2.89E-07 2.10E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.48E-05 1.08E-04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.01E-04 9.43E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 RELEASE ACTIVITY: PROC2: max PDM SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)

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 High12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites: Release Activity: PROC3: max PDM
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 4 Number of Site s: RELEASE ACTIVITY:PROC3: max PDM SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) 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 0.00

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 0.10 0.24 0.38 0.45

ALL 10 39.60 13.29 7.76 7.57 0.76 2.26 3.87 3.96

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 5.68E-07 4.13E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 2.91E-05 2.12E-04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 2.02E-05 1.89E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 4 RELEASE ACTIVITY: PROC3: max PDM SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)

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 High12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:5 Number of Release Sites: Release Activity: PROC4: max acute eco
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 5 Number of Site s: RELEASE ACTIVITY:PROC4: max acute eco SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) 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 0.00

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 2.81 6.54 10.36 12.26

ALL 10 39.60 13.29 7.76 7.57 20.45 60.95 104.38 107.00

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 6.01E-07 4.37E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 3.08E-05 2.24E-04 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 5.47E-04 5.09E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:6 Number of Release Sites: Release Activity: USE1: max 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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 6 Number of Site s: RELEASE ACTIVITY:USE1: max 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 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 5.09 14.24 22.67 27.52

ALL 10 64.45 326.23 579.55 674.01

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 3.26E-06 4.13E-05 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.67E-04 2.12E-03 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.19E-03 2.73E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 6 RELEASE ACTIVITY: USE1: max PDM1

SIC CODE DESCRIPTIO N:

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 High12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:7 Number of Release Sites: Release Activity: USE1: max 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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 7 Number of Site s: RELEASE ACTIVITY:USE1: max PDM2

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. ( μ g/l)

Harmonic

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

ALL 50 4.06 11.35 18.07 21.95

ALL 10 51.39 260.13 462.12 537.44

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 2.14E-05 2.71E-04 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.10E-03 1.39E-02 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 9.49E-04 2.17E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 7 RELEASE ACTIVITY: USE1: max PDM2

SIC CODE DESCRIPTIO N:

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 High12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:8 Number of Release Sites: Release Activity: USE2: max PDM
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 8 Number of Site s: RELEASE ACTIVITY:USE2: max PDM

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 0.00

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 1.99E-03 5.68E-03 9.33E-03 1.11E-02

ALL 10 11.11 1.94 1.06 0.96 2.25E-02 0.13 0.24 0.26

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 1.06E-08 1.20E-07 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 5.46E-07 6.17E-06 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 4.75E-07 1.08E-05 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 8 RELEASE ACTIVITY: USE2: max PDM

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 High12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:9 Number of Release Sites: Release Activity: USE3: max acute eco
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 9 Number of Site s: RELEASE ACTIVITY:USE3: max acute eco
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 0.00

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 2.53 7.22 11.87 14.11

ALL 10 11.11 1.94 1.06 0.96 28.62 163.92 300.00 331.25

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 5.41E-08 6.12E-07 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 2.78E-06 3.14E-05 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 6.04E-04 1.37E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S090001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:10 Number of Release Sites: Release Activity: USE3: max PDM
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:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

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

SCENARIO #: 10 Number of Site s: RELEASE ACTIVITY:USE3: max PDM

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 0.00

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 6.37E-02 0.18 0.30 0.36

ALL 10 11.11 1.94 1.06 0.96 0.72 4.12 7.55 8.33

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 2.72E-08 3.08E-07 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.40E-06 1.58E-05 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.52E-05 3.45E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:12/10/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: S090001

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 10 RELEASE ACTIVITY: USE3: max PDM

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 High12/10/08 Page of



## LEGEND FOR NEW CHEMICAL S EXPOSURE REPORT

This new chemicals exposure report wa s prepared by the Exposure Assessment Branch (EAB) of the Economics, Exposure and Technology Division, Office of Pollution Prevention and Toxics, USEPA.
The goals of these reports are to calcula te conservative (protective) estimates of exposure endpoints for consumers, the general population, and the environment.
For each exposure scenario to industrial releases, the following three endpoints are calculated: (1) maximum possible acute concentrations and doses (2) maximum possible chronic concentrations and doses (3) for water releases ≥ 20 days, the probability of exceedence of the aquatic concentration of concern These endpoints are identified by abbreviati ons on the Release Activity line, e.g., (1) max ADR , (2) max LADD , (3) max PDM . Depending on the release inputs, these e ndpoints may be calculated and presented on the same page or different pages. That is, a release activity ID of mfg; max ADR, max PDM, max LADD indicates that all the exposure endpoints were cal culated from common manufacturing release values; conversely, a release activity ID of mfg &proc; max ADR indicates that only the maximum acute exposure values were calculated for manufacturing and proce ssing releases that occurred at the same site.
For each consumer product use exposure scenario, whether exposure is to the user directly or to the general population/environment, the maximum exposure values are calculated and presented together.
In addition to the exposure values above, EPA policy dir ects that exposure and release values be compared to criteria threshold values for Exposure-based and PBT Exposure-based cases.
Exposure-based (YX) cases (those with ≥ 100,000 kg/yr production volume) Criteria are exceeded under the following conditions: Presence in consumer product with likely exposure ≥ 3E-3 mg/kg/d exposure via air, fish ingestion or drinking water ≥ 10,000 kg/yr release to environment (post-treatment) ≥ 1,000 kg/yr release to water (post-treatment)
Persistent, Bioaccumulative, Toxic (PBT) chemical s of P2B2 rating or hi gher and production volume ≥ 20,000 kg/yr Criteria are exceeded as for YX cases, with the following differences: ≥ 2,000 kg/yr release to environment (post-treatment) ≥ 200 kg/yr release to water (post-treatment)
Bolding rules in the Report: Values for endpoints above th at are also health or eco concerns are bolded.