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HARGIS+ASSOCIATES, INC. <br /> Consultants in Hydrogeology <br /> 2223 Avenida De Lo Playa Suite 300 <br /> Lo Jolla,California 92037 <br /> (619)454-0165 <br /> August 11, 1987 <br /> Thomas A. Hickey <br /> BLACK & VEATCH <br /> 1500 Meadow Lake Parkway <br /> Kansas City, MO 64114 <br /> RE: Off-Site Well Sampling, July 1987 <br /> Dear Mr. Hickey: <br /> In accordance with your letter of June 29, 1987, Hargis + Associates, <br /> Inc. conducted an off-site well sampling program for the Marley Cooling <br /> Tower Company Facility, Stockton, California, during July 1987. Seven <br /> off-site wells were identified for sampling. Six of the wells were sampled. <br /> The off-site well , at 328 North Lillian, was identified by the owner as <br /> being inoperable since 1973. Residents and the California Water Service <br /> were notified of the sampling and permission to enter obtained prior to <br /> sampling. The California Department of Health Services was also notified <br /> prior to sampling. <br /> Water samples were collected from the tap closest to the well head <br /> after flushing the pipeline for at least one minute. A representative <br /> sample was collected in a clean one-gallon polyethylene bottle and filtered <br /> through a 0.45-micron millipore filter into 2 one-liter polyethylene <br /> bottles. One of the bottles contained a small amount of 1N nitric acid to <br /> preserve the sample. The other bottle contained no perservative. Water <br /> samples were analyzed in the field for pH, temperature and conductivity. <br /> Proper chain-of-custody (COC) procedures were followed to ensure <br /> integrity of the samples from the time of collection to reporting of <br /> analytical results. The components of the custody procedure included: <br /> sample labels, sample seals, field log and sample transmittal documents in <br /> accordance with your letter of June 29, 1987. <br /> At least 2 one-liter water samples were collected from each off-site <br /> well , one containing 1N nitric acid, the other empty. The acidified water <br /> sample was analyzed for arsenic, copper and total chromium. The other water <br /> Phoenix olflce. Tucson office. <br /> 2222 South Dobson Road Suite 401 1735 East For LoN,eRoz S„'e 5 <br /> Mesa,Anzonc 85202 Tucson, Anzone 85'19 <br /> (602) 345-0888 (602) 8817300 <br />