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Ms. Ann Kolata May 4, 2012 S131068.400.0001 Page 3 After logging, a small diameter stainless steel screen of approximately 12 inches in length, connected to a piece of flexible tubing of sufficient length to extend above ground surface and allow for sample collection, will be emplaced in the borehole. The borehole surrounding the screen will be filled with appropriately sized sand pack to a depth of six to 12 inches above the top of the screen. A hydrated bentonite seal will be placed above the sand pack. A second shallow sampling point will be similarly installed to a depth of approximately six feet at each sampling location. The locations will be sampled concurrently with the newly - installed monitoring wells as proposed below. Task 3 Groundwater and Soil Gas Sampling Event Groundwater samples will be collected from all newly installed monitoring wells and submitted to the laboratory for VOC analysis using U.S. EPA Method 8260. Prior to sampling, the monitoring wells will be purged until pH, temperature, and conductivity measurements have stabilized, or until three well volumes have been removed, whichever is greater. Following purging, groundwater will be collected using low -flow methods and transferred to laboratory- preserved sample containers at rate of less than 100 ml /min and placed on ice in a cooler. Duplicate samples will be collected at randomly selected monitoring well locations. Field /equipment blanks will also be collected and submitted along with a trip blank for analysis as part of QA/QC of field procedures. Purge and decontamination waters will be collected and stored in U.S. DOT - approved 55- gallon drums. As described above, drill cuttings, excess samples, purge water and decontamination water will be drummed and staged at a location acceptable to the Client. Costs to remove, transport, and dispose of approximately 100 55- gallon drums of containerized groundwater and drill cuttings (which are presumed to be non - hazardous) are included in this task. Approximately 24 to 48 hours following installation of the soil vapor probes, each sampling port will be purged in accordance with IDEM's Draft Vapor Intrusion Pilot Program Guidance, and a sample will be collected via vacuum through a time - weighted flow regulator into a 6 -L stainless steel Summa canister. One duplicate will also be collected. The sealed soil gas samples will be analyzed for volatile organic compounds (VOCs) by EPA Method TO -15. For the purposes of this cost estimate, it is assumed that the soil will be disposed of as a non - hazardous waste. Task 4 Remediation Work Plan Preparation The RWP that was submitted to IDEM in April 2004 will be revised to include additional narratives that describe all past environmental sampling programs completed at the Site. In addition, this revised RWP will include a description and analytical results of the impacted soil areas discovered during demolition activities throughout the former Studebaker Complex. Furthermore, references to groundwater (previously removed when groundwater was to be remediated through a separate VRP number in conjunction with other areas within the City) will be reincorporated into the RWP. To the extent possible, the revised RWP will include copies of analytical reports, summary tables, and location plans for historical soils investigations. Note