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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 remediation <br /> compound is show 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 standard cubic feet per minute (scfin) blower <br /> with 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-sefm 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 cfm 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 Secoi'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 through DW-4) and one destroyed domestic water supply <br /> (DW-2R) well are located within 340 feet of the former tank pit(Figure 2) <br />' Well 4 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 Downgradtent of tank pit <br /> DW-4 340 feet south of tank pit Downgradtent 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 concenti ations of MTBE, the well was taken out of service and replaced with DW-2R <br /> • <br /> Project No 58643-06 01 -3- November 3 2003 <br />