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4Z <br /> 'n-W <br /> 4 <br /> so <br /> DEC 719,99 <br /> FE GROUNDWATER ENV' IROi� A 1- r,1' T­1 <br /> ❑❑❑ TECHNOLOGY, INC. P E R Ivi i 4080-D Pike Lane,Concord,CA 94520 <br /> (415)671-2387 <br /> December 5, 1989 <br /> Job No. 203 475 2894 . 02 <br /> Mr. Morris L. Allen <br /> Department of municipal Utilities ; <br /> 2500 Navy Drive <br /> Stockton, CA 95206 <br /> Re: Monthly Monitoring Report of]Wastewater Discharge <br /> at 7-Eleven No. 20680, 9110 Thornton Road, <br /> Stockton, California. <br /> Dear Mr. Allen: <br /> iI <br /> This letter is to report data collected from monitoring performed <br /> at the above-mentioned site by Groundwater Technology, Inc. (GTI) <br /> for the month of November 1989. During this period of time, <br /> 34, 560 gallons of wastewater were Idischarged to the sanitary <br /> sewer. The average rate of wastewater for discharge was <br /> 0. 8-gallons per minute. Water samples from the air-stripper <br /> influent and effluent lines were collected once during this <br /> period. A second set of samples was collected on December 1, <br /> 1989 and the results of the analy I�;es will be reported in the next <br /> monthly monitoring report. <br /> The groundwater extraction treatment system was inoperable during <br /> the period of October 25 and November 1, 1989 due to a mechanical <br /> failure of the water table depression pump. The system is <br /> presently at full operation and future sampling will be conducted <br /> in accordance with the normal schedule. <br /> Table 1 lists a summary of the laboratory analyses results. <br /> Copies of the original laboratory results are attached. <br /> Offices throughout the U.S.,Canada and Overseas <br /> I I "I <br />