INITIAL REVIEW EXPOSURE REPORT **SANITIZED** Chemical ID: Assessor: ENVIRONMENTAL RELEASES Scenario#: 1 Number of Release Sites: 1 Release Activity: Release Description: WATER LANDFILL STACK FUGITIVE Total Releases: 0.10 12.29 5.00E - 02 0.00 (kg/yr) (kg/yr)

Non- sludge/Sludge (kg/yr) (kg/yr) Release Days/yr: 1.00 1.00/1.00 1.00 0.00 Per Site Release: 0.10 12.20/9.15E- 02 5.00E - 02 0.00 (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day) Remarks:INITIAL REVIEW EXPOSURE REPORT CHEMICAL ID: SITE- SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 1 RELEASE ACTIVITY: FACILITY NAME: MWRDGC STICKNEY WRP FACILITY LOCATION: CICERO IL 60650 RECEIVING WATER NAME: CHICAGO SHIP CANAL REACH NUMBER: 07120004009 FACILITY ON REACH: Yes DISCHARGE TYPE: Direct NPDES PERMIT #: IL0028053 EXPOSED POPULATION: Adult WWT REMOVAL (%) RELEASE

DAYS PRE -TREAT RELEASE

(kg/site/day) POST -TREAT RELEASE (kg/site/day) DWT % BCF

(L/kg) 98.00 1.00 0.10 2.00E - 03 0.00 146.60 AQUATIC EXPOSURE ESTIMATES - SURFACE WATER FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) 4733.21 4271.30 3054.49 3054.49 NA CONCENTRATION ( μ g/L) 4.23E- 04 4.68E - 04 6.55E- 04 6.55E - 04 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) 9.03E- 12 mg/kg/day 5.67E - 12 mg/kg/day LADCpot (mg/L) 4.63E- 10 mg/L 6.79E - 08 mg/kg Acute ADR pot (mg/kg/day) 3.91E- 08 mg/kg/day 1.11E - 07 mg/kg/day

Surface Water Comments:INITIAL REVIEW EXPOSURE REPORT CHEMICAL ID: SITE- SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES SCENARIO #: 1 RELEASE ACTIVITY: FACILITY NAME: MWRDGC STICKNEY WRP FACILITY LOCATION: CICERO IL 60650 RECEIVING STREAM NAME: CHICAGO SHIP CANAL REACH NUMBER: 07120004009 FACILITY ON REACH: Yes DISCHARGE TYPE: Direct NPDES PERMIT NUMBER: IL0028053 GAGING STATION ID: N/A GAGING STATION PERIOD OF RECORD:N/A GAGING STATION NUMBER OBSERVATIONS: N/A NUMBER STATIONS ON REACH: N/A MEAN FLOW(MLD): 3635.95 7q10 FLOW(MLD): 3054.49 EFFLUENT FLOW(MLD):3054.49 RESULTS COC (μ g/L) Percent of Year

COC Exceeded Number of Days

COC Exceeded Release days/year Pre -treatment Loading (kg/site/day) Waste Water

Treatment (%) 15.00 0 0 1 0.10 98.00 29.00 0 0 1 0.10 98.00 249.00 0 0 1 0.10 98.00INITIAL REVIEW EXPOSURE REPORT CHEMICAL ID: INHALATION EXPOSURE ESTIMATES (POST -TREATMENT) SCENARIO #:1 RELEASE ACTIVITY: RELEASE DESCRIPTION: METHOD OF CALCULATION:Screen3 EXPOSED POPULATION:Adult Number of Sites: 1 Per Site Fugitive Release: NA kg/site/day Fugitive Release Days per Year: NA days % Removal via Fugitive Release: 0.00 % Total Fugitive Release: NA kg/yr Max Annual Average Air Concentration (Fugitive): 0.00 μg/m3 Max 24 Hour Average Air Concentration (Fugitive): 0.00 μg/m3 Per Site Stack Release: 5.00E- 02 kg/site/day Stack Release Days per Year: 1.00 days % Removal via Stack Release: 0.00 % Total Stack Release: 5.00E- 02 kg/yr Max Annual Average Air Concentration (Stack): 1.85E- 04 μg/m3 Max 24 Hour Average Air Concentration (Stack): 0.34 μg/m3

Exposure Units Results (Stack) Results

(Fugitive) ASSUMPTIONS

ED (years) AT

(years) BW

(kg) Inh. Rate

(m3/hr) Cancer LADD pot (mg/kg/day) 1.36E - 08 0.00 30.00 75.00 71.80 0.55 LADCpot (mg/m3 ) 7.40E - 08 0.00 30.00 75.00 NA NA Acute ADR pot (mg/kg/day) 6.20E - 05 0.00 NA 1 day 71.80 0.55 Inhalation Comments:Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 m Release Height: N/A Inside Stack Diameter: 0.10 m Length of Release Opening: N/A Stack Gas Exit Velocity: 0.10 m/sec Width of Release Opening: N/A Stack Gas Temperature: 293.00 K Meteorological and Terrain Information: Surrounding Land Use: Rural Terrain Height: 0.00 m Distance to Residence of Interest: 100.00 m Meteorological Class: Full Stability Class: NA Wind Speed: NA Downwash Information: Facility Length: NA m Facility Width: NA m Facility Height: NA m