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Remedial Well System Installation <br />' The lateral ozone infection lines, soil vapor extraction lines, and remediation compound were <br /> Installed following installation of the ozone sparge and SVE wells The location of the remediation <br /> compound is shown on Figure 3 The SVE lines were stubbed up into a manifold in the remediation <br />' compound The Initial SVE system consisted of a 500 cubic feet per minute (cfm) blower with <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 The catalytic oxidizer unit <br /> was replaced in June 2003 with a 300-efm blower using granular activated carbon (GAC) to abate <br /> contaminants <br />' The 20 ozone sparge pipes were stubbed up into a manifold and connected to the 6 cfin ozone sparge <br /> skid Ozone sparging was initiated at the Site on November 20, 2002 <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 />' Domestic Wells <br /> Four domestic water supply wells (DW-1, DW-2R, DW-3 and DW-4) and one destroyed domestic <br /> water supply(DW-2) well are located within 340 feet of the former tank pit(Figure 2) <br />' Well# Location from Tank Pit Comments <br /> DW-1 90 feet west of tank pit Upgradient of tank pit(onsite well) <br /> DW-2 120 feet south of tank pit Downgradient well (well destroyed) <br /> DW-3 245 feet south of tank pit Downgradient of tank pit <br /> DW-4 340 feet south of tank pit Downgradient of tank pit <br />' DW-2R 200 feet south of tank pit 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 BTEX, TPHg, <br /> five oxygenates, 1,2-DCA, and EDB Since water samples collected from DW-2 contained <br />' reportable concentrations of MTB1a, the well was taken out of service and replaced with DW-2R <br />' ProiLct No 58643-06-01 -3- February 18,2004 <br />