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G <br /> I, <br /> 2.3 Remedial Well and System Installation <br /> The lateral ozone injection lines, soil vapor extraction lines, and.. remediation compound were <br /> installed following installation of the ozone sparge and SVE wells. The location of the treatment <br /> compound is shown on Figure 3. The SVE lines were stubbed up into a;manifoid in the treatment <br /> compound. The initial SVE system consisted of a 500 cubic'feet per minute (cfm) blower with a, <br /> catalytic oxidizer fired by natural gas connected to the SVE well field-manifold. Soil vapor <br /> extraction was initiated at the.Site on September 26, 2002, under San Joaquin Valley Air Pollution <br /> Control District.(SJVAPCD)Authority to Construct number N-4613-1-0. <br /> The 20 ozone sparge pipes were stubbed up into a manifold and connected to the 6 cfm ozone sparge <br /> skid. Ozone sparging was initiated at the Site on November,20, 2002. <br /> The catalytic oxidizer unit was replaced in June 2003 with a 300-cfm blower using granular activated <br /> carbon (GAC) to abate contaminants:The 300 cfm blower with GAC was replaced by a 250 cfm <br /> blower with a catalytic oxidizer unit in February 2004. <br /> Additional details of the remediation well installation and system startup are described in Secor's <br /> Remediation Well and Soil Vapor Extraction.System Installation Report,.dated November 27, 2002. <br /> 2.4 Domestic Wells <br /> Four domestic water supply wells (DW-1 R, DW-2R, DW-3 and DW-4), one inactive domestic water <br /> supply well (DW-1) and one destroyed domestic water supply (DW-2) well are located within 340 <br /> �i feet of the former tank pit(Figure 2). . <br /> Well # Location from Tank Pit Comments <br /> DW-1 90 feet west Upgradient of tank pit(onsite well) <br /> DW-IR 120 feet west Upgradient of tank pit(onsite well) <br /> DW-2 120 feet south Downgradient well (well destroyed) <br /> DW-3 245 feet south Downgradient of:tank pit <br /> DW-4 340 feet south Downgradient of tank pit <br /> DW-2R 200 feet south Downgradient of tank pit(well installed <br /> December 2000 to replace DW-2) <br /> Water samples collected from domestic wells have been analyzed for the presence of TPHg, BTEX, <br /> five oxygenates, 1,2-DCA, and EDB. Since water samples collected from DW-2 contained <br /> reportable concentrations of MTBE, the well was taken out of service and replaced with DW-2R. <br /> Domestic well DW-1 is considered a public water supply because it services a retail store (Ranch <br /> Market). The nitrate concentrations detected in water'sainples collected from DW-1 exceeded the <br /> Project No.S8643-06-01 -3 December 30,2004 <br />