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L <br /> �- <br /> - 386 EAST BEAMER STREET <br /> wEGE ESTERN WOODLAND, CA 95776-6003 <br /> GEO-ENGINEERS FAX (916) 662-0273 <br /> CALIF CONTRACTOR #513857 A CORPORATION ` (916) 668-5300 <br /> ! REGISTERED GEOLOGISTS <br /> Mr Larry Williams August 19, 1998 <br /> Senior Enviionmental Control Officer <br /> City of Stockton <br /> Dept of Municipal Utilities <br /> 2500 Navy Di ivc <br /> Stockton, CA 95206 <br /> (209) 944-8722 <br /> RE Wastewater Discharge Permit UPDATE #34 (or Wickland Piopertzes site 8603, located at <br /> 6425 Pacific Avenue, Stockton, California <br /> Dear Mi Williams <br /> This letter is the Update Status Report #34 concerning the above wastewater discharge pei mit No <br /> discharge occ rn red during; the month of July 1998 <br /> SPILL PREVENTION PLAN <br /> As required by the Wastewater Discharge Permit for this site, a spill prevention plan has been <br /> prepai eel <br /> The wa,,tc stn cam 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 tine well,,, through dedicated one inch Sell 40 PVC pipe, into a 100 gallon stainless steel tank <br /> 1 his water is then transferred to the "ConVault" for treatment by "tank aeration", with the vapor <br /> destruction accomplished using air stripping with activated carbon adsoiption The carbon is also <br /> concurrently destroying vapor being pulled from the soil LT I' has, for the time being, stopped <br /> (August 1993) purging monitor wells MW1, MW2, MW3, MW8 and MW10 We are still placing <br /> the condensate water produced from the vapor extraction system into the "ConVault" fol vacuunn <br /> stripping treatment <br /> IZ-603 W W1134 8119198 <br />