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21 March 2006 <br /> AGE-NC Project No 97-0290 <br />' Page 5 of 15 <br />' surrounding ground water investigations to date,there is evidence that PCE-impacted ground water <br /> was detected down-gradient of the site The proximity to the Guild Cleaners site is approximately <br /> 750 feet southwest and down-gradient of the Lodi Theater site <br />' PCE has been detected in water samples collected from the City of Lodi domestic well number <br /> CW-3 (now destroyed), located 1,750 feet southeast of the site, at concentrations up to <br />' 260 micrograms per liter (gg/l, 09 September 1989) However, other sources of discharged PCE <br /> have been confirmed in close proximity to this well location, including Guild Cleaners, which has <br /> been identified as a confirmed source for soil contamination in the Lodi area <br /> I <br /> 5.0. FEASIBILITY ANALYSIS <br />' An in-situ air sparging and soil vapor extraction pilot test were performed in May 1999 and a ground <br /> water extraction pilot test was performed in July 1999 to examine remedial options for the site The <br /> feasibility analysis was conducted in accordance with SVEIMSPdot Test WorkPlan,dated 18 March <br /> 1999, and Ground Water Extraction Test Work Plan, dated 06 July 1999 <br /> 5 1 IN-SITU AIR SPARGING PILOT TEST <br /> From 10 through 13 May 1999, an in-situ air sparging (IAS) pilot test was performed at the site A <br /> soil vapor extraction pilot test was performed on 13 May 1999 This pilot test was performed to <br /> Iprovide data to evaluate the feasibility of air sparging as a remediation method at the site <br /> 52 SOIL VAPOR EXTRACTION PILOT TEST <br /> On 13 May 1999, an 8-hour soil vapor extraction (SVE) pilot test was conducted at the site, <br /> concurrent with the air sparging test The SVE pilot test was performed to provide vapor extraction <br /> data for feasibility analysis of the remediation method and for proper design of the remediation <br /> system (Appendix A) <br /> 53 AQUIFER PUMP TEST <br /> On 15 July 1999, a limited aquifer pump test was performed at the site The depth to ground water <br /> was measured in wells MW-1, MW-2, MW-4, MW-5, SW-1, SW-2, and VW-IC using a Solinst <br /> water level meter A 2-inch diameter Grundfos submersible pump was lowered into VW-IC <br /> Pressure transducers were then placed in wells VW-1C, SW-1, SW-2, and MW-2 and connected to <br /> Advanced GeoEnvironmentai,Inc <br /> I <br />