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.f <br /> WESTERN 1386 I-AS 1 131 AMLR S I R1 I I <br /> WOODI AND CA 95776-6001 <br /> -WHO,�+ GEO-ENGINEERS (530) 668-5300 <br />. CA] IIS CON I1ZAC loft 9513857 1 AX(530)662-0273 <br /> IM-61S]1--R3.D GLOLO(AS IS Lnm <br /> Mr Larry Williams July 13, 1999 <br /> Senior Environmental Control Officer <br /> City of Stockton <br /> Dept of Municipal Utilities <br /> 2500 Navy Drive <br /> Stockton, CA 95206 <br /> (209) 944-8722 <br /> RE Wa4tewatcr Discharge Permit UPDATE #45 for Wicklatid Propci tics site R603, located at <br /> 6425 Pacific Avenue, Stockton, California <br /> Dear Mr Williams <br /> This letter is the Update Status Report #45 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 sticam is treated groundwater condensate produced from the vapor extraction of monitor <br /> wells MW 1, MW2, MW3, and M W 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 pu np 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 MW1, MW2, MW3 and MWIO The vapor extraction system has been temporarily turned <br /> off awaiting the San Joaquin County Ilcalth decision for no further action at this site Condensate <br /> water produced from the vapor extraction system is placed into the "ConVault" for vacuum <br /> stripping treatment <br /> 1 R-603 W W 445 7/13/99 <br />