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Y Mr. Sam Savig Project 880-040.1A December 12, 2001 Page 4 A 20-horsepower(hp) liquid ring pump capable of achieving vacuum up to 29 inches of mercury (Hg). • A 300-gallon air and water separator vessel. The water from the separator vessel is automatically pumped to a 21,000-gallon holding tank for future disposal. The vapor stream is abated via the onboard thermal oxidizer. • A 350-standard cubic feet per minute (scfm) propane-fired thermal oxidizer with a minimum volatile organic compounds (VOC) destruction efficiency rate of 99 percent. Data collection during testing will be performed as follows: Vapor flow rate will be measured with a hot wire anemometer; • Groundwater flow rate will be measured with a paddle wheel style flow meter/totalizer; • Real-time vapor-phase VOC concentrations will be screened in the field with a flame ionization detector(FID); • Vacuum influence in surrounding wells will be measured utilizing magnehelic pressure gauges; • Groundwater influence in surrounding wells will be measured utilizing pressure transducers;' • Grab soil-vapor and groundwater samples will be sent to an analytical laboratory for quantification. Soil-vaporand groundwater samples will be analyzed for TPHg by EPA Method 8015 (modified). Soil-vapor and groundwater samples were also . analyzed for BTEX and MtBE using EPA Method 8260B. IT performed a file review of neighboring sites. Slug tests were performed by'SECOR at the Union 76 Station located immediately east of the site. Results showed an average hydraulic conductivity of 2.53 x 10-4 centimeters per second for the shallow groundwater aquifer. Based 1 on this aquifer data, IT anticipates an extraction rate of 0.65 gallons per minute,will lower groundwater levels approximately 10 feet in well MW-1 during the test. Based on 5-days of extraction, the test will produce approximately 5,000 gallons of groundwater. IT will monitor groundwater elevations in the two existing wells and the two newly installed wells during the test i to determine if adequate hydraulic control can be imposed on the aquifer to halt the possible off- site migration of MtBE. Task 5- Technical Report Following the completion of the well/boring installations and the feasibility testing, IT will prepare a report summarizing the procedures, field results, and analytical results. The report will \\S ACRFP I\COM MON\sacDP\2001\PRJ\PJ8\8800401 A.I ac.doc 12/12/01