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1• 11 March 2002 AGE-NC Project No. 95-0130 1 Page 12 of 13 ' report with findings and recommendations. Purged ground water will be containerized in an on-site 10,000-gallon Baker tank; following 1 the 24-hour pump test, a composite "grab" ground water sample will be collected from the Baker tank to analyze for TPH-g, BTEX, MTBE, TBA, TAME, DIPE, ETBE, EDB and 1,2- DCA by EPA Methods 8015M,8020 and 8260M.The purged ground water will be transported ' under non-hazardous waste manifest off-site to an appropriate disposal facility. ' 4.5. SOIL VAPOR EXTRACTION PILOT TEST Following SVE well installation, an eight-hour SVE pilot test will be performed at the site to 1 determine feasibility of SVE as a remediation alternative.An internal combustion(IC) driven engine will be used to apply a vacuum on SVE well VW-4 while wells VW-1, VW-2, VW-3, EW-1 and MW-8 will be utilized as observation points. During the SVE pilot test, SVE operational parameters including soil-gas vapor concentrations,air flow and vacuum measurements will be monitored at 1/2-hour intervals utilizing Dwyer Magnehelic vacuum gauges and a photo- ionization detector(PID: Thermo Environmental 580A; 10.0 eV; calibrated to isobutylene). • Soil vapor samples will be collected at two-hour intervals utilizing a hand air-vacuum pump and Tedlar bags and analyzed for TPH-g,BTEX and MTBE from a DHS-certified laboratory. 1 Soil vapor field parameters and analytical results will facilitate the design of an SVE system and will be used to determine a general radius of influence for spacing of SVE wells and the selection of an appropriate SVE system. ' 4.6. IN-SITU AIR SPARGING PILOT TEST Following the SVE pilot test,an IAS pilot test will be performed. For performance of an in-situ air ' sparging(IAS)pilot test, a compressor driven unit will be used to inject air into the subsurface via the IAS well. The IAS pilot test will be operated for a period of 48-hours(2 days). IAS well AW-1 will be utilized as the air injection point during the 48-hour IAS pilot test while wells MW-1, ' MW-2,MW-3,MW-5,MW-8,VW-1,VW-2,VW-3 and EW-1 will be utilized as observation points. Several parameters, including air injection rate, vapor concentrations, ground water depth and dissolved oxygen will be measured at a minimum of 1-hour intervals from observation wells. Results of the IAS pilot test will be included in a CAP. 1 • Advanced GeoEnvironmen[aI,Inc.