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a <br /> WESTERN 1386 LAS I I3I AMER S MIA I <br /> GEQ-ENGINEERS wcx�1�I AMS CA 95776-0003 <br /> (530) 668-538-53 00,, <br /> CAI.II CONIRAC I OR#513857 I AX(530)662-0273 <br /> RFGISI ERLD GE01 ObISTS xvLgc@Pniother Lonl <br /> Mr Larry Williams APR 15 1999 April 7, 1999 <br /> Senior Environmental Control Officer <br /> .4\/IPt�I�1vIENTAL HEALTO <br /> City of Stockton _1SERVICES <br /> Dept of Municipal Utilities PERMIT 1 <br /> -,2500 Navy Drive <br /> Stockton, CA 95206 <br /> (209) 944-8722 <br /> RE Wastewater Discharge Permit UPDATE ##42 for Wickland Properties site 8603, located at <br /> 6425 Pacific Avenue, Stockton, California <br /> Dear Mr Williams <br /> This letter is the Update Status Report##42 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 MW10, 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 MW1, 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 /> 1 R-603 WW#42 4/07199 <br />