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groundwater monitoring wells, • Drill and install three groundwater monitoring wells to depths of approximately 85 feet below the ground surface (bgs) It is ' anticipated that first groundwater is at approximately 75 feet bgs, Collect soil samples from the ground surface at 5-foot intervals to ' the first occurrence of groundwater Selected soil samples will be analyzed for total petroleum hydrocarbons (TPH) quantitated against gasoline and diesel standards and benzene, toluene, ' ethylbenzene, and total xylenes (BTEX) using EPA methods 8015 and 8020, respectively, ' 0 Purge and sample groundwater from each of the three installed monitoring wells All groundwater samples will be analyzed for TPH, BTEX, and total lead using EPA methods 8015, 8020, and 7421, respectively; • Survey well casings for relative elevation and measure depths to ' groundwater in all wells to evaluate the groundwater flow direction and hydraulic gradient, • Conduct a vapor extraction treatability test on the newly installed wells Vapor samples will be collected and analyzed for TPH and BTEX, and ' 0 mi to USA and PHS/EHD a written report Prepare and submit po ' summanzing the findings of this investigation This report will include characterization of potential impaction of soil and/or groundwater as well as the interim remedial alternative ' 1.3 Schedule ' Park anticipates beginning the work described in this workplan within 21 days of receiving approval from the PHS/EHD and authorization from USA Petroleum Field activities will be completed within 30 days of mobilization Submittal of a site characterization report well be ' within 30 days of receipt of all data ' 2.0 BACKGROUND 2.1 Facility Description ' The USA Petroleum service station is located on the southeast corner of the intersection of Fast " A 1125J2 WP 2