Use of Insitu Thermal

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Shannon Long
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1 Use of Insitu Thermal Treatment at Ideal Cleaners Jim Harrington Div of Environmental Remediation November 16, 2010

2 Ideal Cleaners Site History Groundwater Contamination Soil Contamination Analysis of Remedial Alternatives ti Implementation of Remedy Current Status

4 They paved paradise and put up a parking lot

5 Site History Development of the Neighborhood Auto Sales, Electrical Contracting Ideal Cleaners Industrial Facility Parkin g Lot 2002 Present Redeveloped Facility Parking Lot Former Manufacturing Facility Took Responsibility for Remediation

6 Former Endicott Forge Former Ideal Cleaners

7 Groundwater Contamination

8 Groundwater Contamination Off-Site Groundwater Captured Impacts From Endicott Forge

9 Ideal Cleaners Off-Site Water Table Oil Smear Zone

11 Fuel Oil Presence of Fuel Oil Facilitates Biodegradation of PCE Significant PCE Mass is Dissolved in Oil

12 PCE P

13 Soil Contamination

14 Soil Contamination Characterized With 58 Membrane Interface Probe (MIP) Borings 41 On-Site 17 Off-Site 110Soil 85 Locations ocato -Including cud 763 Soil Samples for VOC Analysis 3 Soil Borings for Kd Testing 6 Soil Borings For Geotechnical Data 8 Soil Samples For Bacterial Sampling

15 Soil Boring Locations

17 Off-Site

18 Off-Site Off-Site

19 Distribution of PCE Mass ESTIMATED PCE MASS IN SOIL (>.56 mg/kg) Zone Volume (yd 3 ) Mass (lbs) Vadose Zone 7, Water Table Oil Smear Zone 1, Saturated Zone Silt Zone 356 2

20 Distribution of PCE Mass Property ESTIMATED PCE MASS IN SOIL (>.56 mg/kg) g) Depth (ft. bgs) Volume (yd 3 ) Mass (lbs) 1900 North Subtotal 5, , Arthur Subtotal , Jackson , Subtotal ,305 1 <1 22 Combined , Total 1, , Property Beyond Total 2, ,

21 Remaining Alternatives Excavation combined with Enhanced Bioremediation (MNA) - $79MM 7-9 In-Situ Thermal Treatment combined with Enhanced Bioremediation and MNA - $ 5.4 MM

22 In-Situ Thermal Treatment Thermal Conduction Heating with Off-gas Capture and Treatment Post Treatment MNA & Bioremediation Target Upper 30 ft of soil with PCE >.56mg/kg g Treatment Goals Avg Soil Resid idual of.56mg/k /kg Maximum of 5.5 mg/kg for any one sample 95 % Site-Wide Mass Removal

23 Thermal Conduction Heating System Components 257 heater wells 19 multi-phase extraction wells 72 vapor extraction wells vapor phase and liquid id phase carbon treated water discharge to POTW

24 42-14 wells wells wells wells wells

25 ISTD: Simplified Site Layout Treated vapor to atmosphere Vapor treatment Power distribution system Heater wells Extraction well Knockout pot Heat exchanger Blower Pump Vapor cap Water treatment Discharge Temperature and pressure monitoring holes Figure courtesy of Terratherm Treatment area foot-print

26 Monitoring and Sampling Temperature and Pressure Flow rates, liquid levels Power consumption Liquid id and vapor phase influent and effluent sampling Real Time PID Sampling Summa Canister Sampling

27 System Operation Final soil temp - > 100 C 192 operating days GW power (250 KwH average) MG treated t water to POTW No ambient air impacts No soil vapor migration

28 Results 55 Confirmatory Samples Average soil sample mg/kg PCE Highest soil sample mg/kg PCE 59/60 confirm. samples < 0.56 mg/kg Removal of > 450 pounds of CVOCs Removal of > 8,100 Petroleum HC

29 Current Status ISTD Complete Pumping Systems still running Groundwater Monitoring i MNA