SITE INFORMATION AND CORRESPONDENCE

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.. `e" r.r Ms. Linda Turkatte March 14, 1996 Page 3 intervals will be sealed at each end with a Teflon sheet and plastic cap, sealed in an air-tight bag, and preserved on ice pending shipment to a state-certified laboratory. Between sampling attempts, all sampling equipment will be cleaned using a three-bucket wash system. In this system, the liners and samplers are scrubbed with a brush in a bucket of tap water and detergent, rinsed in a second bucket of tap water, and given a final rinse in a bucket of distilled water. It is anticipated that four soil samples, the samples collected at 20, 30, 40, and 50 feet below ground surface, will be analyzed by the laboratory to verify current subsurface soil conditions. Samples selected for laboratory analysis will be transported under chain of custody to Argon Labs (DHS cert. #1873) and analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX) and total petroleum hydrocarbons as gasoline(TPHG)by EPA methods 8020 and modified 8015, respectively. If laboratory analyses detect elevated levels of petroleum hydrocarbons in soil, selected samples may also be analyzed for physicochemical characteristics (TOC, PKN, permeability, and bacteria population) as well as leachable hydrocarbons (TCLP TPHG/BTEX). The soil cuttings will be placed on and covered with 6 mil plastic sheeting and stockpiled on-site. Soil cuttings will be properly disposed of after reviewing the analytical results and obtaining agency approval. Groundwater Sampling and Analysis A groundwater sample will be collected from well MW 1 after purging a minimum of three well casing volumes. Measurements of electrical conductivity, pH, and temperature will be recorded during purging and allowed to stabilize prior to sample collection to ensure samples are representative of formation water. Clean, disposable bailers with bottom emptying devices will be used to reduce volatilization during sample collection. The Sample will be transferred to appropriate sample containers, labelled with sample identification, placed on ice, and shipped under chain-of-custody protocol to Argon Labs. The sample will be analyzed for BTEX and TPHG by EPA methods 8020 and modified 8015, respectively. The method detection limit for groundwater sample analysis of BTEX and TPHG will be 0.5 and 50 ppb, respectively. Purged groundwater will be stored on site in a DOT approved 55-gallon drum pending proper disposal. A drilling permit application and associated fee will be submitted to your office upon pre-approval of this proposed workplan by Mr. George Lockwood of the State Water Resources Control Board. 9r0undu\hendrix\wp0396.jp1