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i <br /> • WESTERN 1186 LAS I BLAMER S IRLI I <br /> WOODI AND CA 95776-6003 <br /> H'0�'+ GEO-ENGINEERS (530) 668-5300, <br />. r 7 7 CALIF CONI'RAC 4OR#513857P 1 AX(530)662-0273 <br /> RI-GI831✓R1-D Gr01,CX&;TS 16 N%Lg1-@'111otlur coni <br /> i <br /> Mr Larry Williams November 20, 1998 I <br /> Senior Environmental Control Officer <br /> City of Stockton <br /> Dept of Municipal Utilities <br /> 2500 Navy Dr ive <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 Williams <br /> This letter is the Update Status Report##38 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 sti cam is treated groundwater condensate produced from the vapor extraction of monitoi <br /> wells MW 1, 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 /> 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 I, 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 />• <br /> 1 R-603 WW1438 11/20/98 <br />