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. 1 z 19 January 1996 AGE-NC Project No 95-0144 r Page 2 of 4 Soil samples will be collected at five-foot intervals beginning at 10 feet bsg in each bon ng Samples will be collected using a Geoprobe soil sampling assembly loaded with four brass sleeves Upon sample retrieval, the second brass sleeve will be removed from the sampler The ends of the sleeve will be immediately covered with Teflon sheets, capped and sealed with tape Samples will be placed in a chilled container and transported to a State-certified laboratory Each sample sleeve will be labeled with the following boring location, depth, time, date and sampler's initials 3 2 EQUIPMENT DECONTAMINATION All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean - 4 water after washing with a solution of Alconox Geoprobe rods will be cleaned prior to advancement at each probing location 3 3 LABORATORY ANALYSIS Selected soil samples will be analyzed for TPH-g and BTE&X in accordance with EPA methods' 8015m and 8020, respectively Laboratory reports, laboratory quality assurance/quality control (QA/QC) reports and sample chain of custody documentation will be presented in a report with the findings and recommendations At least one sample will be transmitted to Mr Keith Kaufman, M S , an independent microbiologist, and analyzed for physicochemical properties and microbiological enumeration Data from these analysis will be used to determine the soils indigenous bacterial populations ability to support microbiological degradation of petroleum hydrocarbons 3 4 IN-SITU AIR SPARGING TEST ; For performance of an IAS pilot test, a compressor-driven unit will be used to inject air-into the subsurface via the IAS wells Data collected during the IAS pilot test will be used to determine if IAS is a feasible remedial option for the site The IAS pilot test will be operated for a period of 96-hours (4 days) Air will be injected into two wells using the compressor-driven unit Several parameters, including radius of influence, sparging rate, sparging vapor fofcentrations, ground wa�depths and dissolved oxygen, will be measured at each sparging point and at selected monitoring wells Results of if e IAS pilot test will be included in a Corrective Action Plan (CAP)