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WESTERN 1 380 EA5"1-13EAWR S'1RETIT <br /> GEO-ENGINEERS W(M)LAND CA 95776-0003 <br /> (530) 668-5300, <br /> CALIF.CON"I.12ACi'Olt#513857 FAX(530)662-0273 <br /> 10"MSTLUD GE01.061STS �vcge!n'inoihcr.ca3n <br /> Mr. Lar WilliamsLarry November 20, 1998 <br /> t Senior Environmental Control Officer <br /> j City of Stockton <br /> Dept. of Municipal Utilities <br /> 2500 Navy Drive <br /> Stockton, CA. 95206 <br /> (209) 944-8722 <br /> RE: Wastewater Discharge Permit UPDATE #38 for Wickland Properties site R603, located at <br /> 6425 Pacific Avenue, Stockton, California. <br /> Dear Mr. Willi:�ms: <br /> This letter is the Update Status Report #38 concerning the above wastewater discharge permit <br /> 1 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 thevapor extraction of monitor <br /> wells MW1, MW2, MW3, and MW10, and the purged water produced during the quarterly ground <br /> I 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 I00 gallon stainless <br /> steel tank. <br /> 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 MW 10. We are still placing the condensate water produced from the <br /> vapor extraction system into the "ConVault" for vacuum stripping treatment. <br /> v <br /> I R-603 WW#38 11/20/98 <br />