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4 <br /> Ozone Mrcrosparge System Frrst Semi-Annual Status Report—76 Branded(Former BP)Facility No 11192,Stockton,California <br /> September 2 2003 <br /> The current ozone infection addresses the dissolved impact onsite and also acts as a barrier to <br /> mitigate any continuing migration of dissolved hydrocarbons offsite The ozone microsparge <br /> system will continue to operate and monitoring wells MW-3 and MW-4 will continue to be <br /> sampled on a monthly basis An additional semi-annual status report will be prepared and <br /> submitted following the receipt of 4h quarter 2003 data <br /> System Information <br /> T - <br /> Startup Date December 20, 2002 <br /> Months of Operation 7 <br /> Number of ozone mjection points 10 (SP-A through SP-H, SP-3, and SP-K) <br /> Periodic groundwater sampling MW-3, MW-4 <br /> 140245 10 5 <br />