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1 <br />' Soil vapor extraction and air sparging system• <br /> i <br /> A soil vapor extraction/air sparging (SVE/AS) system operated from 1994 to 1996 and recovered <br /> petroleum hydrocarbon vapors from wells MW2, MW3, MWS, MW6, V1, V2, and V4 in <br /> conjunction with air sparging wells SWI and SW2 A total of approximately 14,500 pounds of <br />' petroleum hydrocarbons was removed from the vadose zone by the SVE/AS system The SVE <br /> influent concentration and the cumulative estimated pounds of TPH-g removed became asymptotic <br /> over time <br />' Perozone Infection System and Soil Vapor Extraction, <br />' An oxidation pilot test using ozone and hydrogen peroxide(perozone)began in October 2005 and is <br /> ongoing During the reporting period,ozone and hydrogen peroxide were injected into the saturated <br /> soils using injection wells 1PIA, EMB, 22A, IP2B, IBA, and IMB periodically To monitor the <br /> injection system, dissolved oxygen concentrations, pH, ORP, temperature, and pressure influence <br /> were measured from various observation wells located onsite Groundwater samples from injection <br />' and observation wells were also analyzed for petroleum hydrocarbons and water quality parameters <br /> As some hydrocarbons may be volatilized due to the perozone injection during the field study, the <br /> existing SVE system is being used to abate hydrocarbons and/or ozone in the vadose zone During <br /> the reporting period soil vapors were extracted from wells MW2,MW3,MWS,MW6,V1,V2, and <br /> V4 Soil vapors were extracted using a regenerative blower, and treated with two 2,000-pound <br /> • activated carbon vessels in series Weekly momtoring of the SVE system was conducted during the <br /> reporting period The SVE influent soil vapor samples were analyzed for petroleum hydrocarbons <br /> The results of the pilot study, inclusive of operational parameters for both the injection system and <br /> SVE system, as well as groundwater analysis for hydrocarbons and groundwater parameters,will be <br /> submitted under separate cover <br /> t <br /> 1 <br /> 1 <br />' G 1Pro)ects1739425PUBLT000_k)&<Qua aly Progress Rq*n\200543942 Q I205_system doe 4 <br />