December 10, 2003 INITIAL REVIEW EXPOSURE REPORT Case Number: P040132 Assessor: Wormell ENVIRONMENTAL RELEASES Scenario#: 1 Number of Release Sites: 10. Release Activity: Processing Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 0.00 0.00 800.00 0.00 5.00 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 0. 250. Per Site Release: 0.00 0.00 80.00 0.00 2.00E-03 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks: Fugitive releases less than 23 kg/site/yr. Incineration releases less than 200 kg/site/yr.

Consumer use expected?INITIAL REVIEW EXPOSURE REPORT

Case Num ber: P040132 Assessor: Wormell ENVIRONMENTAL RELEASES Scenario#: 2 Number of Release Sites: 1. Release Activity: Use Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 2613.40 1000.00 1000.00 0.00 0.70 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 73. 70. Per Site Release: 35.80 1000.00 1000.00 0.00 1.00E-02 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks: Fugitive release <23 kg/site/yr. First wate r release is 22 kg/site/day over 73 days. Release to water, incin OR land of 13.822 kg/site/day over 73 days added to water release. Incin release <200 kg/site/yr after assumed 99.9% destruction of organicsINITIAL REVIEW EXPOSURE REPORT CASE NUMBER:P040132 SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #:2 RELEASE ACTIVITY:Use SIC-CODE DESCRIPTION:POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S):4952 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) 80. 20.00 73. 35.8 7.16 1880.00

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 50 311.58 116.44 75.70 61.91 22.98 61.49 94.58 115.65 ALL 10 32.75 11.98 7.19 5.98 218.63 597.66 995.83 1197.32

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 3.58E-05 3.41E-04 mg/kg/day 2.89E-04 2.75E-03 mg/kg/day LADC pot1.84E-03 1.75E-02 mg/L 3.46 32.88 mg/kg Chronic Non-Cancer ADD pot 8.96E-05 8.53E-04 mg/kg/day 7.22E-04 6.87E-03 mg/kg/day ADC pot4.60E-03 4.37E-02 mg/L 8.64 82.20 mg/kg Acute ADR pot 5.14E-03 4.99E-02 mg/kg/day 7.76E-02 0.74 mg/kg/dayINITIAL REVIEW EXPOSURE REPORT CASE NUMBER: P040132

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: Use SIC CODE DESCRIPTION: POTW (Indust., in cludes POTWs which receive ind. disch.) ASSOCIATED SIC CODES: 4952 from 1011-1999,2211-5199,5511-5599,7211-8099 SIC CODE RESULTS COC ( μ g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis 20.00 18.76 68 73 35.80 80.00 High

REMARK: The concentration of concern (COC ) is exceeded 20 or more days per year.INITIAL REVIEW EXPOSURE REPORT CASE NUMBER:P040132

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES SCENARIO #:2 ACTIVITY:Use RELEASE DESCRIPTION: EXPOSED POPULATION:Adult

NUMBER OF SITES LANDFILL RELEASE (kg/yr) LANDFILLED SLUDGE (kg/yr) MIGRATION FACTOR 1 DRINKING WATER TREATMENT (%) 1. 1000.00 0.00 8.00E-05(Rapid) 0.00

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot(mg/kg/day) 6.24E-04 30.00 75.00 71.80 1.40 LADC pot(mg/L) 3.20E-02 30.00 75.00 NA NA Chronic Non-Cancer ADD pot(mg/kg/day) 1.56E-03 30.00 30.00 71.80 1.40 ADC pot(mg/L) 8.00E-02 30.00 30.00 NA NAINITIAL REVIEW EXPOSURE REPORT

Case Num ber: P040132 Assessor: Wormell ENVIRONMENTAL RELEASES Scenario#: 3 Number of Release Sites: 18. Release Activity: Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 0.00 1000.00 1000.00 0.00 40.50 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 0. 250. Per Site Release: 0.00 55.56 55.56 0.00 9.00E-03 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks: Fugitive releases less than 23 kg/site/yr. 1,000 kg/yr released to Landfill OR Incineration - both less than 200 kg/site/yr.INITIAL REVIEW EXPOSURE REPORT

Case Num ber: P040132 Assessor: Wormell ENVIRONMENTAL RELEASES Scenario#: 4 Number of Release Sites: 10. Release Activity: Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 0.00 0.00 500.00 0.00 22.50 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 0. 250. Per Site Release: 0.00 0.00 50.00 0.00 9.00E-03 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks: Fugitive releases less than 23 kg/site/yr. Incineration release less than 200 kg/site/yr.