Final 06/08/07 INITIAL REVIEW EXPOSURE REPORT

Case Number: P070453 Assessor: Sherer ENVIRONMENTAL RELEASES Scenario#: 1 Number of Release Sites: Release Activity: Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 5.31 3.00 3.00 0.00 0.99 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 20. 20. Per Site Release: 6.64E-02 0.75 0.75 0.00 1.24E-02 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks: Two releases are to water or air or inci neration or landfill. Two releases are to water or incineration or landfill. Water release assume sum of five releases. Landfill and incineration releases assume sum of four releases. Fugitive rel ease assumes sum of two releases. Landfill, incineration and fugitive releas es are below threshold of concern.

Consumer use expected?INITIAL REVIEW EXPOSURE REPORT CASE NUMBER:P070453 SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #:1 RELEASE ACTIVITY: SIC-CODE DESCRIPTION: SIC-CODE (S): EXPOSED POPULATION:Adult

WASTE WATER TREATMENT REMOVAL (%) COC (μg/L) RELEASE DAYS PRE-TREATMENT RELEASE

(kg/day) POST-TREATMENT RELEASE

(kg/day) BCF (L/kg) 50. 20.00 20. 0.0664 3.32E-02 3.16

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( : g/l) Harmonic

MEAN 30Q5 7Q10 1Q10 Harmonic MEAN 30Q5 7Q10 1Q10 ALL 50 311.58 116.44 75.70 61.91 0.11 0.29 0.44 0.54 ALL 10 32.75 11.98 7.19 5.98 1.01 2.77 4.62 5.55

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 4.55E-08 4.33E-07 mg/kg/day 6.17E-10 5.87E-09 mg/kg/day LADC pot2.34E-06 2.22E-05 mg/L 7.38E-06 7.02E-05 mg/kg Chronic Non-Cancer ADD pot 1.14E-07 1.08E-06 mg/kg/day 1.54E-09 1.47E-08 mg/kg/day ADC pot5.84E-06 5.55E-05 mg/L 1.84E-05 1.76E-04 mg/kg Acute ADRpot 2.38E-05 2.32E-04 mg/kg/day 6.05E-07 5.76E-06 mg/kg/dayINITIAL REVIEW EXPOSURE REPORT CASE NUMBER: P070453

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 RELEASE ACTIVITY: SIC CODE DESCRIPTION: ASSOCIATED SIC CODES: SIC CODE RESULTS COC ( : g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis 20.00 2.30E-02 8.39E-02 20 6.64E-02 50.00 HighINITIAL REVIEW EXPOSURE REPORT

Case Number: P070453 Assessor: Sherer ENVIRONMENTAL RELEASES Scenario#: 2 Number of Release Sites: Release Activity: Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 2.46 2.46 2.46 0.00 0.48 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 250. 250. Per Site Release: 8.20E-04 0.20 0.20 0.00 1.60E-04 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks: One releases is to water or air or inci neration or landfill. Two releases are to water or incineration or landfill. Water, landfill, and incineration releases assume sum of three releases. Landfill, incineration, and fugitive rel eases are below threshold of concern.INITIAL REVIEW EXPOSURE REPORT CASE NUMBER:P070453 SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #:2 RELEASE ACTIVITY: SIC-CODE DESCRIPTION: SIC-CODE (S): EXPOSED POPULATION:Adult

WASTE WATER TREATMENT REMOVAL (%) COC (μg/L) RELEASE DAYS PRE-TREATMENT RELEASE

(kg/day) POST-TREATMENT RELEASE

(kg/day) BCF (L/kg) 50. 20.00 250. 0.00082 4.10E-04 3.16

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( : g/l) Harmonic

MEAN 30Q5 7Q10 1Q10 Harmonic MEAN 30Q5 7Q10 1Q10 ALL 50 311.58 116.44 75.70 61.91 1.32E-03 3.52E-03 5.42E-03 6.62E-03 ALL 10 32.75 11.98 7.19 5.98 1.25E-02 3.42E-02 5.70E-02 6.86E-02

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 7.03E-09 6.69E-08 mg/kg/day 9.52E-11 9.06E-10 mg/kg/day LADC pot3.61E-07 3.43E-06 mg/L 1.14E-06 1.08E-05 mg/kg Chronic Non-Cancer ADD pot 1.76E-08 1.67E-07 mg/kg/day 2.38E-10 2.26E-09 mg/kg/day ADC pot9.01E-07 8.57E-06 mg/L 2.85E-06 2.71E-05 mg/kg Acute ADRpot 2.94E-07 2.86E-06 mg/kg/day 7.47E-09 7.11E-08 mg/kg/dayINITIAL REVIEW EXPOSURE REPORT CASE NUMBER: P070453

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: SIC CODE DESCRIPTION: ASSOCIATED SIC CODES: SIC CODE RESULTS COC ( : g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis 20.00 0.00 0 250 8.20E-04 50.00 High