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WESTERN ,' i`i 1386 EAST"REAMER STREET <br /> f- ':- A . " L -. WOODLAND CA 95776-6003 <br /> GEO-ENGINEERS (530) X68-5300, <br /> CALIF.qONTRAC-rOR#.51;39577 FAX(530)662-0273 <br /> R1 Cj�IS`]ERM, GEOLbG'R,TS wege@mother-com <br /> Mr. Larry Williams February 9, 1999 <br /> s Senior Environmental Control Officer <br /> City of Stockton <br /> l Dept. of Municipal Utilities <br /> 2500 Navy Drive <br /> Stockton, CA' 95206 <br /> (209) 944-8722 <br /> RE: Wastewater Discharge Permit UPDATE #40 for Wickland Properties site R603, located at <br /> 6425 Pacific Avenue, Stockton, California. <br /> Dear Mr. Williams: <br /> This letter is the Update Status Report#40 concerning the above wastewater discharge permit. <br /> SPILL PREVENTION PLAN <br /> As required by the Wastewater Discharge Permit for this site, a spill prevention plan has been <br />' prepared. <br /> The waste stream is treated groundwater condensate produced from the vapor extraction of monitor <br /> wells MW I, MW2, MW3, and MW 10, and the purged water produced during the quarterly ground <br /> water sampling of all the wells associated with this site. <br /> Lawrence Tank Testing's (LTT) vacuum pump service uses their vacuum pump to pull the water <br /> from MW8 and MW12, through dedicated one inch Sch 40 PVC pipes, into a 100 gallon stainless <br /> f steel tank. <br /> k This water is then transferred to the "ConVault" for treatment by "tank aeration", with the vapor <br /> destruction accomplished using air stripping. LTT has stopped (August 1993) purging monitor <br /> wells MW 1, MW2, MW3 and MW10. We are still placing the condensate water produced from the <br /> vapor extraction system into the "ConVault" for vacuum stripping treatment. <br /> i <br />! e <br /> i l <br /> 1 R-603 WW#40 2109/99 <br />