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1 • • <br /> 1 30 December 1998 <br /> AGE-NC Project No 95-0173 <br /> 1 Page 11 of 12 <br /> 1 4 3 2 In-situ Air Sparging Piping Systeem—� <br /> An electric air compressor will operate n� d ende o This will allow for control <br /> 1 of air flow to each IAS well and "surging" of the IAS system, if necessary, to prevent mounding <br /> and/or migration of the dissolved hydrocarbons A separate electrical source and meter will be <br /> necessary for the IAS system <br /> 1 A network of one-inch diameter, schedule 40 PVC piping will be installed in 6-inch wide by 12-inch <br /> deep trenches at the site The PVC piping will be routed from each IAS well head to an air <br /> rcompressor A PVC ball valve will be installed at each IAS well head so that air flow can be <br /> depressed independently A plan of the proposed air sparging piping system is depicted in Figure <br /> r5 <br /> The location of the air compressor is proposed near the southwest corner at the site (Figure 5) The <br /> r air compressor will be secured by a chain-linked, gated enclosure with measurements 15 feet wide <br /> by 20 feet long and six feet in height <br /> r• 4 3 3 In-situ Air Sparging Monitoring Activities <br /> r Quarterly ground water monitoring and sampling is proposed throughout the remediation period <br /> However, we recommen on measurements of ground water depth and dissolved oxygen from <br /> ground water monitoring wells at the site to determine if ground water mounding is occurring as a <br /> result of the IAS system operation <br /> 44 PERMITTING <br /> I An application for a site specific permit will be submitted to the San Joaquin Valley Air Pollution. <br /> Control District (SJVAPCD) prior to initiation of the remediation project In addition, proper <br /> building permits will be obtained from the City of Stockton Building Department for necessary <br /> construction work, including natural gas and electrical source installations <br /> All necessary well/boring permits will be submitted to the PHS-EHD prior to any drilling activities <br /> A minimum of 48 hours notice will be given to the PHS-EHD prior to performing any field work <br /> 45 SOIL VAPOR EXTRACTION/IN-SITU AIR SPARGING SYSTEM MAINTENANCE <br /> iThe SVE/IAS system will be maintained on a weekly basis, according to manufacturers <br /> Advanced CeoEnvironmental,Inc <br /> f <br />