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I <br /> R603 SEWER 6 8-31-93 <br />{ <br /> the centrifugal pump through a totalizer water meter. The water <br /> is then passed through a chamber containing an LEL meter relay <br /> calibrated to shut down the system if vapors from the effluent <br /> ever reach the 10% LEL level . The clean treated water is <br /> discharged to the 3" sewer clean out . Visual inspections for <br /> leaks on above ground lines, tanks and double contained system <br /> will occur during all site visits . <br /> UPDATE STATUS REPORT #6 <br /> Interim ground water treatment started December 1, 1992 . LTT is <br /> vacuum lifting (purging) monitor wells MW1, MW2 , MW3 , MWS and <br /> MW10 twice a week. Before the well purging commenced, water <br /> samples were obtained from the "ConVault" tank aerator before <br /> dumping 800 gallons of this treated water to the sewer lateral, <br /> see Update Status Report #1 The last dumping was for 700 <br /> gallons, making a total of 5172 gallons of treated ground water <br /> dumped to the sewer as of August 23, 1993 . A continuous LEL <br /> reading of the discharge water was observed and noted on the <br /> following table All discharge requirements were met <br /> No treated water was dumped to the sewer during the month of July, <br /> 1993 <br /> Sincerel yours <br /> George Converse <br /> Proms t Manager <br /> cc Mr John Margowski, Wickland Properties <br /> Ms . Mary Meays, Public Health San Joaquin Co. <br /> page 2 <br />