4/29/2004 REVISED EXPOSURE REPORT

ENVIRONMENTAL RELEASES Scenario#: 1 Number of Release Sites: 1.
Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 145.00 0.00 0.00 0.00 0.00 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 29. 0. Per Site Release: 5.00 0.00 0.00 0.00 0.00 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks:

Parameter Exp Based Persistent Exceedance value Drinking (Surface) Water Dose (mg/kg/day) N/A No Fish Ingestion Dose (mg/kg/day) N/A No Inhalation Dose (mg/kg/day) N/A No Groundwater Dose (mg/kg/day) N/A No Surface Water Release after treatment (kg/yr) N/A No Total Release After Treatment (kg/yr) N/A No Consumer Exposure Dose? NoREVISED EXPOSURE REPORT SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 1

WWT REMOVAL (%) COC (μg/L) RELEASE DAYS PRE-TREAT RELEASE (kg/day) POST-TREAT RELEASE (kg/day) BCF (L/kg) 0. 1.00 29. 5. 5.00 0.00
AQUATIC EXPOSURE ESTIMATES - SURFACE WATER FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) 7122.79 1683.16 1164.85 940.48 NA CONCENTRATION ( : g/L) 0.70 2.97 4.29 5.32 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion Units Cancer LADD pot(mg/kg/day) 4.35E-07 mg/kg/day 0.00 mg/kg/day LADC pot(mg/L) 2.23E-05 mg/L 0.00 mg/kg Chronic Non-Cancer ADD pot(mg/kg/day) 1.09E-06 mg/kg/day 0.00 mg/kg/day ADC pot(mg/L) 5.58E-05 mg/L 0.00 mg/kg Acute ADR pot(mg/kg/day) 2.48E-04 mg/kg/day 0.00 mg/kg/dayREVISED EXPOSURE REPORT
SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 1

50%ILE FLOW: 2.66E+04 10%ILE FLOW: 1164.85 EFFLUENT FLOW:18.54 RESULTS COC ( : g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) 1.00 1.32 5 29 5.00 0.00REVISED EXPOSURE REPORT

ENVIRONMENTAL RELEASES Scenario#: 2 Number of Release Sites: 1.
Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 6.20 0.00 0.00 0.00 0.00 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 1. 0. Per Site Release: 6.20 0.00 0.00 0.00 0.00 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks:REVISED EXPOSURE REPORT

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 2

WWT REMOVAL (%) COC (μg/L) RELEASE DAYS PRE-TREAT RELEASE (kg/day) POST-TREAT RELEASE (kg/day) BCF (L/kg) 0. 1.00 1. 6.2 6.20 0.00
AQUATIC EXPOSURE ESTIMATES - SURFACE WATER FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) 7122.79 1683.16 1164.85 940.48 NA CONCENTRATION ( : g/L) 0.87 3.68 5.32 6.59 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion Units Cancer LADD pot(mg/kg/day) 1.86E-08 mg/kg/day 0.00 mg/kg/day LADC pot(mg/L) 9.54E-07 mg/L 0.00 mg/kg Chronic Non-Cancer ADD pot(mg/kg/day) 4.65E-08 mg/kg/day 0.00 mg/kg/day ADC pot(mg/L) 2.38E-06 mg/L 0.00 mg/kg Acute ADR pot(mg/kg/day) 3.08E-04 mg/kg/day 0.00 mg/kg/dayREVISED EXPOSURE REPORT SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 2

RESULTS COC ( : g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) 1.00 5.71E-02 0 1 6.20 0.00REVISED EXPOSURE REPORT

ENVIRONMENTAL RELEASES Scenario#: 1 Number of Release Sites: 1.
Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 156.60 0.00 0.00 0.00 0.00 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 29. 0. Per Site Release: 5.40 0.00 0.00 0.00 0.00 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks:

Parameter Exp Based Persistent Exceedance value Drinking (Surface) Water Dose (mg/kg/day) N/A No Fish Ingestion Dose (mg/kg/day) N/A No Inhalation Dose (mg/kg/day) N/A No Groundwater Dose (mg/kg/day) N/A No Surface Water Release after treatment (kg/yr) N/A No Total Release After Treatment (kg/yr) N/A No Consumer Exposure Dose? NoREVISED EXPOSURE REPORT
SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 1

WWT REMOVAL (%) COC (μg/L) RELEASE DAYS PRE-TREAT RELEASE (kg/day) POST-TREAT RELEASE (kg/day) BCF (L/kg) 0. 20.00 29. 5.4 5.40 0.00
AQUATIC EXPOSURE ESTIMATES - SURFACE WATER FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) 7122.79 1683.16 1164.85 940.48 NA CONCENTRATION ( : g/L) 0.76 3.21 4.64 5.74 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion Units Cancer LADD pot(mg/kg/day) 4.70E-07 mg/kg/day 0.00 mg/kg/day LADC pot(mg/L) 2.41E-05 mg/L 0.00 mg/kg Chronic Non-Cancer ADD pot(mg/kg/day) 1.17E-06 mg/kg/day 0.00 mg/kg/day ADC pot(mg/L) 6.02E-05 mg/L 0.00 mg/kg Acute ADR pot(mg/kg/day) 2.68E-04 mg/kg/day 0.00 mg/kg/dayREVISED EXPOSURE REPORT
SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 1

50%ILE FLOW: 2.66E+04 10%ILE FLOW: 1164.85 EFFLUENT FLOW:18.54 RESULTS COC ( : g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) 20.00 0.00 2.24E-02 29 5.40 0.00REVISED EXPOSURE REPORT

ENVIRONMENTAL RELEASES Scenario#: 2 Number of Release Sites: 1.
Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE Total Releases: 6.60 0.00 0.00 0.00 0.00 (kg/yr) (kg/yr) (kg/yr) (kg/yr) (kg/yr) Release Days/yr: 1. 0. Per Site Release: 6.60 0.00 0.00 0.00 0.00 (kg/day) (kg/yr) (kg/yr) (kg/yr) (kg/day) Remarks:REVISED EXPOSURE REPORT
SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 2

WWT REMOVAL (%) COC (μg/L) RELEASE DAYS PRE-TREAT RELEASE (kg/day) POST-TREAT RELEASE (kg/day) BCF (L/kg) 0. 20.00 1. 6.6 6.60 0.00
AQUATIC EXPOSURE ESTIMATES - SURFACE WATER FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) 7122.79 1683.16 1164.85 940.48 NA CONCENTRATION ( : g/L) 0.93 3.92 5.67 7.02 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion Units Cancer LADD pot(mg/kg/day) 1.98E-08 mg/kg/day 0.00 mg/kg/day LADC pot(mg/L) 1.02E-06 mg/L 0.00 mg/kg Chronic Non-Cancer ADD pot(mg/kg/day) 4.95E-08 mg/kg/day 0.00 mg/kg/day ADC pot(mg/L) 2.54E-06 mg/L 0.00 mg/kg Acute ADR pot(mg/kg/day) 3.28E-04 mg/kg/day 0.00 mg/kg/dayREVISED EXPOSURE REPORT CASE NUMBER: P040153 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 2

50%ILE FLOW: 2.66E+04 10%ILE FLOW: 1164.85 EFFLUENT FLOW:18.54 RESULTS COC ( : g/L) % yr exceeded Days/yr exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) 20.00 0.00 0 1 6.60 0.00