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r-T- i 13 BEAMER STREET <br /> I WE ESTERN R E r " D, CA 95776-6003 <br /> GEO-ENGINEERS APR 14 1993 FAX (9 16) -5 3 73 <br /> CALIF CONTRACTOR#513857 A CORPO 916) 6688-5300 <br /> REGISTERED GEOLOGISTS PERMv /SERVICES <br /> Mr. Larry Williams April 12 , 1993 <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 : Wastewater Discharge Permit UPDATE #3 for former Regal <br /> Station located at 6425 Pacific Avenue, Stockton, California <br /> Dear Mr Williams : <br /> The following letter is the Monthly Status Report concerning the <br /> above wastewater discharge permit <br /> SPILL PREVENTION PLAN <br /> As required by the Wastewater Discharge Permit for this site, a <br /> spill prevention plan has been prepared <br /> The waste stream is treated ground water produced from interim <br /> purging (twice weekly) of monitor wells MW1, MW2, MW3 , MW8 and <br /> MW10 <br /> Lawrence Tank Testings (LTT) vacuum pump service is purging the <br /> above mentioned wells to depletion. A vacuum- pump pulls the <br /> water from the wells through dedicated one inch Sch 40 PVC pipe <br /> into a 100 gallon stainless steel tank This water is then <br /> transferred to the "ConVault" for treatment by "tank aeration" <br /> with the vapor destruction accomplished using the incinerator. <br /> The incinerator is concurrently destroying vapor being pulled <br /> from the soil <br /> If evaluations indicate that a continuous ground water pumping <br /> 4 <br />