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1 <br /> Soil vapor extraction and air sparging system: <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, MW5, MW6, V1, V2, and V4 in <br /> conjunction with air sparging wells SW 1 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 Injection System and Soil Vapor Extraction <br />' An oxidation pilot test using ozone and hydrogen peroxide(perozone)began in October 2005 and is <br /> ongoing Ozone and hydrogen peroxide are injected into the saturated soils using injection wells <br />' <br /> PIA, IP1B, IP2A, IP2B, IP3A, and IP3B To monitor the injection system, dissolved oxygen <br /> concentrations, pH, ORP, temperature, and pressure influence are being measured from various <br /> observation wells located onsite Groundwater samples from injection and observation wells are also <br />' being 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 The <br /> existing SVE system is capable of extracting soil vapors from wells MW2,MW3,MW5,MW6,V1, <br /> V2, and V4 Soil vapors are extracted using a regenerative blower, and treated with two 2,000- <br /> pound activated carbon vessels in series <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 /> I <br /> G Trolects1739421PUBLICID&_WQuarterly Pmgress RepWr 2005L3942 Q1045_syvem doc 4 <br />