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_ PRECISION <br /> INDUSTRIES <br /> June 15, 1987 <br /> I i <br /> VINC <br /> G E N E R A L City of Stockton <br /> ENGINEERING Public Works Department <br /> CONTRACTORS 425 N El Dorado <br /> & S E R V I C E Stockton, CA 95202 <br /> S T A T I O N <br /> MAINTENANCE Attention Director of_Uti_h_ty_D-1y]5ion__ <br /> LICENSE NO 467293 <br /> Re Safeway Stores , Inc. Meat Processing Department <br /> 1111 Navy Drive, Stockton, CA 95204 _ <br /> Dear Sir, <br /> My firm, Precision Industries Inc. , has been engaged for the <br /> purpose of removing four 12,000 gallon underground storage tanks <br /> at the above named facility 1 <br /> All four tanks were new when installed and have contained <br /> diesel fuel only since that <br /> In the course of our work we have found that one tank, tank <br /> #3, has been subject to ground water intrusion It is our <br /> assumption that the water has entered the vessel through a break <br /> in the tank wall . <br /> e process o umping tank #3 free of diesel after <br /> discovering the leak , some water was inadvertently added to tank <br /> #4. <br /> Approximately 12,000 gallons of water is present in both j <br /> tanks combined. We propose that the water be treated with a <br /> water oil separator system and an activated charcoal bed <br /> manufactured by Nelson Franklin Company. This proceedure will <br /> render the water free of hydrocarbons above 3 parts per million. <br /> To verify hydrocarbon levels , the water will by held in <br /> above ground tanks on site with samples taken for analysis of <br /> total hydrocarbons. Weiss Associates, a geotQchnical firm, will <br /> be responsible for taking samples and chain of custody Brown <br /> and Caldwell , a state certified water lab, will perfotm the <br /> analysis. <br /> The results of sampling will be submitted to the director of <br /> utilities before the water can be released into the sanitary <br /> 2191 NAVY DR S FOC K TON CAUrC)RNiA 95206 209 r 462-9911 100/332-50u() <br />