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r,i n <br /> iMs Lan Duncan <br /> February 9, 2004 <br /> Page 6 <br /> Process Flow <br /> Ozone Injection tubing (approximately 318-Inch diameter), doubly-contained within PVC tubing, will <br /> connect each OS well to a 6-point panel, located in a small remediation compound at the location <br /> shown on Figure 2 The panel will be plumbed to a 6-point Injection solenoid within the OS unit, <br /> allowing rotation of the Injection lines between the 6 OS points at a rate of 6 standard cubic feet per <br /> minute (scfm) The OS unit will be equipped with a compressor rated to deliver 6 scfm at 10 pounds <br /> per square inch (psi) The proposed layout of the OS system is presented as Figure 2 <br /> Remediation System Permitting and Installation <br /> Z <br /> Following approval if the IR /P OS well construction permits will be obtained from San Joaquin <br /> County Environmental Health -Division (SJCEHD) Construction of the remediation system will begin, r <br /> following the approval of permits, revision of the existing encroachment permit with the City of s <br /> Stockton, and completion of an access between Atlantic Richfield Company and the Taco Bell <br /> property owner for the Installation of the ozone remedial compound on their property <br /> Remediation System Troubleshooting and Startup <br /> Upon completion of the OS system installation, the OS system will be brought on-line to verify the <br /> correct operation of process equipment and controls, and to troubleshoot and repair any component <br /> of the system not operating correctly Once the system is fully operable, official startup will be <br /> performed Data from the OS system start-up will be tabulated to evaluate the remediation system ry <br /> performance <br /> 3 <br /> Remediation System Operation and Reporting <br /> Reports documenting the performance of the OS system will be submitted quarterly The <br /> remediation system will be checked, and maintenance activities will be performed on a monthly basis <br /> to ensure that the system is operating properly and effectively As part of the system operation and It <br /> maintenance, SECOR will check and maintain equipment, and monitor the OS system for fugitive <br /> ozone emissions In lateral piping trenches and well boxes The OS system will be operated untilF <br /> remediation goals are achieved, or until the remediation effort is shown to no longer be technically or <br /> economically feasible I-V <br /> fir, d <br /> Future quarterly remedial report submittals will include a summary of remediation system <br /> performance, and an evaluation of dissolved petroleum hydrocarbon concentrations detected In site -� <br /> groundwater monitoring wells to determine whether OS is an effective technique for a� <br /> reducing/removing petroleum hydrocarbons In sod and groundwater beneath the site ; e <br /> WORK PLAN FOR ADDITIONAL OFF-SITE ASSESSMENT AND OS WELL <br /> INSTALLATION Al <br /> As discussed above, a total of 6 OS wells (OS-1 through OS-6) are proposed across the site as part <br /> of a revised interim remedial action plan to control off-site migration of source area impacts, and to <br /> remediate residual petroleum hydrocarbons and MtBE beneath the site Locations of proposed OS ;°_ <br /> 11ARM49324orkplans%Revised TRAP&WP doo <br />