10/27/2010 Page 1 of 47



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: S-11-0001 Reviewer:

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

Exposure Scenario 1

ADR LADD ADR LADD 7Q10 4
CC = 170 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

MFG/PROC: Max ADR --- --- --- --- --- --- --- --- --- 1.79E+01 ---

MFG/PROC: Max LADD --- --- --- --- --- --- --- --- --- --- 5.81E-02

USE 1: max
acute eco 7.32E-03 --- 3.63E-03 --- 1.60E+02 --- --- --- --- --- ---

USE 1: PDM1 --- --- --- --- 1.60E+02 21 --- --- --- --- ---

USE 1: Max LADD --- 8.50E-05 --- 4.81E-05 --- --- 2.05E-04 --- --- --- ---

USE 2: max
acute eco 2.67E-02 --- 1.32E-02 --- 5.85E+02 --- --- --- --- 4.41E-02 ---

USE 2: Max LADD --- 2.15E-05 --- 1.21E-05 --- --- 5.18E-05 --- --- --- 9.71E-04

USE 3: max
acute eco 3.75E-02 --- 1.86E-02 --- 8.21E+02 --- --- --- --- --- ---

USE 3: PDM1 --- --- --- --- 8.21E+02 83 --- --- --- --- ---

USE 3: Max LADD --- 4.35E-04 --- 2.46E-04 --- --- 1.05E-03 --- 6.14E-04 --- ---

USE 4: max
acute eco 3.62E-02 --- 1.79E-02 --- 7.92E+02 --- --- --- --- --- ---

USE 4: Max LADD --- 1.45E-05 --- 8.23E-06 --- --- 3.51E-05 --- --- --- ---

USE 5: max
acute eco 2.20E-01 --- 1.10E-01 --- 4.81E+03 --- --- 6.25E-02 --- --- ---

USE 5: Max LADD --- 1.18E-04 --- 6.66E-05 --- --- 2.84E-04 --- --- --- ---10/27/2010 Page 2 of 47

Remarks:


### Results Table: Exposure Based (XB)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value (mg/kg/day) Yes NA 2.20E-01 (mg/kg/day) Yes NA 1.10E-01 (mg/kg/day) Yes NA 1.79E+01 Groundwater Dose (mg/kg/day) No NA (kg/yr) Yes NA 6.78E+03 (kg/yr) Yes NA 9.52E+04
Consumer Use? No



### Fate test recommendations?: (default is NA)10/27/2010 Page 3 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: 1. Release Activity: MFG/PROC: Max ADR
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases:

Release Days/yr:

Per Site Release:
(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:10/27/2010 Page 4 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY:MFG/PROC: Max ADR

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

Number of Sites:
Per Site Fugitive Release:
Fugitive Release Days per Year:
% Removal via Fugitive Release:
Total Fugitive Release:
Max Annual Average Air Concentration (Fugitive):

Max 24 Hour Average Air Concentration(Fugitive):

Per Site Stack Release:

Stack Release Days per Year:

% Removal via Stack Release:

Total Stack Release:
Max Annual Average Air Concentration (Stack):

Max 24 H our Average Air C oncentration (Stack):

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) N/A 1.57E-03 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 8.56E-03 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) N/A 17.91 NA 1 day 71.80 0.55

Inhalation Comments:10/27/2010 Page 5 of 4710/27/2010 Page 6 of 47

INITIAL REVIEW EXPOSURE REPORT10/27/2010 Page 7 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY:MFG/PROC: Max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

Number of Sites:
Per Site Fugitive Release:
Fugitive Release Days per Year:
% Removal via Fugitive Release:
Total Fugitive Release:
Max Annual Average Air Concentration (Fugitive):

Max 24 Hour Average Air Concentration(Fugitive):

Per Site Stack Release:

Stack Release Days per Year:

% Removal via Stack Release:

Total Stack Release:
Max Annual Average Air Concentration (Stack):

Max 24 H our Average Air C oncentration (Stack):

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) N/A 5.81E-02 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 0.32 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) N/A N/A NA 1 day 71.80 0.55

Inhalation Comments:10/27/2010 Page 8 of 4710/27/2010 Page 9 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: 50. Release Activity: USE 1: Max ADR
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases:

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

Remarks:10/27/2010 Page 10 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

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

SCENARIO #: 3 Number of Sites: 50 RELEASE ACTIVITY:USE 1: 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)

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 1.35 3.86 6.34 7.55

ALL 10 11.11 1.94 1.06 0.96 15.30 87.63 160.38 177.08

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

Units
50% 10% 50% 10%

Cancer

LADD pot 7.52E-06 8.50E-05 mg/kg/day 4.26E-06 4.81E-05 mg/kg/day

LADC pot 3.86E-04 4.36E-03 mg/L 5.09E-02 0.58 mg/kg

Acute

ADR pot 3.23E-04 7.32E-03 mg/kg/day 3.21E-04 3.63E-03 mg/kg/day

SIC Code Comments:10/27/2010 Page 11 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor: Kwon/BC

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites: 50. Release Activity: USE 1: PDM1

Remarks:10/27/2010 Page 12 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

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

SCENARIO #: 4 Number of Sites: 50 RELEASE ACTIVITY:USE 1: PDM1
SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EXPOSED POPULATION: Adult

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 1.35 3.86 6.34 7.55

ALL 10 11.11 1.94 1.06 0.96 15.30 87.63 160.38 177.08

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

Units
50% 10% 50% 10%

Cancer

LADD pot 7.52E-06 8.50E-05 mg/kg/day 4.26E-06 4.81E-05 mg/kg/day

LADC pot 3.86E-04 4.36E-03 mg/L 5.09E-02 0.58 mg/kg

Acute

ADR pot 3.23E-04 7.32E-03 mg/kg/day 3.21E-04 3.63E-03 mg/kg/day

SIC Code Comments:10/27/2010 Page 13 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 4 RELEASE ACTIVITY: USE 1: PDM1
SIC CODE DESCRIPTION: POTW's (All facilities)

ASSOCIATED SIC CODES: 4952

COC (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

170.00 6 21 90.00 High

Note: Number of COC days exceeds 20.10/27/2010 Page 14 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor: Kwon/BC

ENVIRONMENTAL RELEASES

Scenario#:5 Number of Release Sites: 50. Release Activity: USE 1: Max LADD10/27/2010 Page 15 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 5 Number of Sites: 50 RELEASE ACTIVITY:USE 1: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EXPOSED POPULATION: Adult

WWT PRETREATMENT POSTTREATMENT DWT

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (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

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

Units
50% 10% 50% 10%

Cancer

LADD pot 7.52E-06 8.50E-05 mg/kg/day 4.26E-06 4.81E-05 mg/kg/day

LADC pot 3.86E-04 4.36E-03 mg/L 5.09E-02 0.58 mg/kg

Acute

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

SIC Code Comments:10/27/2010 Page 16 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

SCENARIO #: 5 ACTIVITY: USE 1: 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 (%)

Moderate 0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatme nt 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) 2.05E-04 30.00 75.00 71.80 1.40
LADC pot (mg/L) 1.05E-02 30.00 75.00 NA NA

REMARKS:10/27/2010 Page 17 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor: Kwon/BC

ENVIRONMENTAL RELEASES10/27/2010 Page 18 of 47

INITIAL REVIEW EXPOSURE REPORT

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 4.94 14.08 23.13 27.52

ALL 10 11.11 1.94 1.06 0.96 55.81 319.59 584.91 645.83

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

Units
50% 10% 50% 10%

Cancer

LADD pot 1.90E-06 2.15E-05 mg/kg/day 1.07E-06 1.21E-05 mg/kg/day

LADC pot 9.74E-05 1.10E-03 mg/L 1.29E-02 0.15 mg/kg

Acute

ADR pot 1.18E-03 2.67E-02 mg/kg/day 1.17E-03 1.32E-02 mg/kg/day

SIC Code Comments:10/27/2010 Page 19 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) N/A 9.71E-04 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 5.28E-03 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) N/A 4.41E-02 NA 1 day 71.80 0.55

Inhalation Comments:10/27/2010 Page 20 of 4710/27/2010 Page 21 of 47

INITIAL REVIEW EXPOSURE REPORT10/27/2010 Page 22 of 47

INITIAL REVIEW EXPOSURE REPORT

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (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

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

Units
50% 10% 50% 10%

Cancer

LADD pot 1.90E-06 2.15E-05 mg/kg/day 1.07E-06 1.21E-05 mg/kg/day

LADC pot 9.74E-05 1.10E-03 mg/L 1.29E-02 0.15 mg/kg

Acute

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

SIC Code Comments:10/27/2010 Page 23 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

SCENARIO #: 7 ACTIVITY: USE 2: 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 (%)

Moderate 0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatme nt 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) 5.18E-05 30.00 75.00 71.80 1.40
LADC pot (mg/L) 2.66E-03 30.00 75.00 NA NA

REMARKS:10/27/2010 Page 24 of 47

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) N/A 9.71E-04 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 5.28E-03 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) N/A N/A NA 1 day 71.80 0.55

Inhalation Comments:4710/27/2010 Page 26 of 4710/27/2010 Page 27 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 8 Number of Sites: 10 RELEASE ACTIVITY:USE 3: Max ADR
SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EXPOSED POPULATION: Adult

WWT

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 6.93 19.76 32.46 38.62

ALL 10 11.11 1.94 1.06 0.96 78.31 448.45 820.75 906.25

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

Units
50% 10% 50% 10%

Cancer

LADD pot 3.85E-05 4.35E-04 mg/kg/day 2.18E-05 2.46E-04 mg/kg/day

LADC pot 1.97E-03 2.23E-02 mg/L 0.26 2.95 mg/kg

Acute

ADR pot 1.65E-03 3.75E-02 mg/kg/day 1.64E-03 1.86E-02 mg/kg/day

SIC Code Comments:10/27/2010 Page 28 of 47

Re m arks:10/27/2010 Page 29 of 47

SCENARIO #: 9 Number of Sites: 10 RELEASE ACTIVITY:USE 3: 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)

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 6.93 19.76 32.46 38.62

ALL 10 11.11 1.94 1.06 0.96 78.31 448.45 820.75 906.25

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

Units
50% 10% 50% 10%

Cancer

LADD pot 3.85E-05 4.35E-04 mg/kg/day 2.18E-05 2.46E-04 mg/kg/day

LADC pot 1.97E-03 2.23E-02 mg/L 0.26 2.95 mg/kg

Acute

ADR pot 1.65E-03 3.75E-02 mg/kg/day 1.64E-03 1.86E-02 mg/kg/day

SIC Code Comments:10/27/2010 Page 30 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 9 RELEASE ACTIVITY: USE 3: PDM1

COC (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

170.00 23 90.00 High

Note: Number of COC days exceeds 20.10/27/2010 Page 31 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor: Kwon/BC

Release Activity: USE 3: Max LADD10/27/2010 Page 32 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 10 Number of Sites: 10 RELEASE ACTIVITY:USE 3: Max LADD
SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EXPOSED POPULATION: Adult

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (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

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

Units
50% 10% 50% 10%

Cancer

LADD pot 3.85E-05 4.35E-04 mg/kg/day 2.18E-05 2.46E-04 mg/kg/day

LADC pot 1.97E-03 2.23E-02 mg/L 0.26 2.95 mg/kg

Acute

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

SIC Code Comments:10/27/2010 Page 33 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

SCENARIO #: 10 ACTIVITY: USE 3: 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 (%)

Moderate 0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatme nt 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) 1.05E-03 30.00 75.00 71.80 1.40
LADC pot (mg/L) 5.38E-02 30.00 75.00 NA NA

REMARKS:10/27/2010 Page 34 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) 6.14E-04 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 3.34E-03 N/A 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) N/A N/A NA 1 day 71.80 0.55

Inhalation Comments:10/27/2010 Page 35 of 4710/27/2010 Page 36 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor:

Scenario#:11 Number of Release Sites: 100.10/27/2010 Page 37 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 11 Number of Sites: 100 RELEASE ACTIVITY:USE 4: 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)

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 6.69 19.08 31.34 37.28

ALL 10 11.11 1.94 1.06 0.96 75.61 432.99 792.45 875.00

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

Units
50% 10% 50% 10%

Cancer

LADD pot 1.29E-06 1.45E-05 mg/kg/day 7.28E-07 8.23E-06 mg/kg/day

LADC pot 6.60E-05 7.46E-04 mg/L 8.71E-03 9.84E-02 mg/kg

Acute

ADR pot 1.59E-03 3.62E-02 mg/kg/day 1.59E-03 1.79E-02 mg/kg/day

SIC Code Comments:10/27/2010 Page 38 of 47

INITIAL REVIEW EXPOSURE REPORT10/27/2010 Page 39 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 12 Number of Sites: 100 RELEASE ACTIVITY:USE 4: Max LADD
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)

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (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

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

Units
50% 10% 50% 10%

Cancer

LADD pot 1.29E-06 1.45E-05 mg/kg/day 7.28E-07 8.23E-06 mg/kg/day

LADC pot 6.60E-05 7.46E-04 mg/L 8.71E-03 9.84E-02 mg/kg

Acute

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

SIC Code Comments:10/27/2010 Page 40 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

SCENARIO #: 12 ACTIVITY: USE 4: 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 Moderate 0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatme nt 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) 3.51E-05 30.00 75.00 71.80 1.40
LADC pot (mg/L) 1.80E-03 30.00 75.00 NA NA

REMARKS:10/27/2010 Page 41 of 47

INITIAL REVIEW EXPOSURE REPORT10/27/2010 Page 42 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 13 Number of Sites: 25 RELEASE ACTIVITY:USE 5: 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)

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (g/l)

Harmonic

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

ALL 50 125.56 44.02 26.80 22.53 40.62 115.86 190.30 226.36

ALL 10 11.11 1.94 1.06 0.96 459.05 2628.87 4811.32 5312.50

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

Units
50% 10% 50% 10%

Cancer

LADD pot 1.04E-05 1.18E-04 mg/kg/day 5.89E-06 6.66E-05 mg/kg/day

LADC pot 5.34E-04 6.04E-03 mg/L 7.05E-02 0.80 mg/kg

Acute

ADR pot 9.68E-03 0.22 mg/kg/day 9.63E-03 0.11 mg/kg/day

SIC Code Comments:10/27/2010 Page 43 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) 1.66E-04 N/A 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 9.04E-04 N/A 30.00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) 6.25E-02 N/A NA 1 day 71.80 0.55

Inhalation Comments:10/27/2010 Page 44 of 4710/27/2010 Page 45 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001 Assessor: Kwon/BC

Scenario#:14 Number of Release Sites: 25.10/27/2010 Page 46 of 47

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: S-11-0001

SCENARIO #: 14 Number of Sites: 25 RELEASE ACTIVITY:USE 5: Max LADD
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)

0.00 132.00

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. (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

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

Units
50% 10% 50% 10%

Cancer

LADD pot 1.04E-05 1.18E-04 mg/kg/day 5.89E-06 6.66E-05 mg/kg/day

LADC pot 5.34E-04 6.04E-03 mg/L 7.05E-02 0.80 mg/kg

Acute

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

SIC Code Comments:10/27/2010 Page 47 of 47

INITIAL REVIEW EXPOSURE REPORT Chemical ID: S-11-0001

SCENARIO #: 14 ACTIVITY: USE 5: 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 (%)

Moderate 0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatme nt 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) 2.84E-04 30.00 75.00 71.80 1.40
LADC pot (mg/L) 1.46E-02 30.00 75.00 NA NA

REMARKS: