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1-11:1k GROUNDWATER <br /> E:]E:]E] TECHNOLOGY, INC. <br /> OIL RECOVERY SYSTEMS 1832 Tribute Road,Suite G,Sacramento,California 95815(916)921-1800 <br /> May 12 , 1988 <br /> Project Number 202/029000-080 <br /> NQS/11W�3� <br /> Mr . Dave Karls <br /> San Joaquin Local Health District Hld H <br /> 749 North Sierra Nevada Street ��� �dW <br /> Stockton, CA 95205 <br /> RE: PRELIMINARY SUBSURFACE INVESTIGATION <br /> PACIFIC GAS AND ELECTRIC DEHYDRATOR STATION <br /> LATHROP, CALIFORNIA <br /> Dear Mr . Karls : <br /> This letter, prepared by Groundwater Technology, Inc . (GTI ) <br /> summarizes information required to commence a preliminary <br /> subsurface investigation at the above referenced site (see Figure <br /> 1 , Site Location Map) . This letter was written to comply with <br /> guidelines of the California Regional Water Quality Control Board <br /> (CRWQCB) , Central Valley Region, and the San Joaquin Local Health <br /> District (SJLHD) . <br /> BACKGROUND <br /> The site is located on the northwest corner of the intersection <br /> of Vadine Road and Willow Glenn Road in Lathrop, California. <br /> Figure 2 (Site Plan) shows the layout of the site, including all <br /> equipment associated with the natural gas dehydration/odorization <br /> process . <br /> The site is situated in the southern portion of the Sacramento <br /> River Delta on flat , low lying fluvial deposits consisting of <br /> sands, silts and clays . Nearby surface waters include the Middle <br /> River, approximately 1000 feet to the west and the Old River, <br /> approximately 1 mile to the south. Site elevation is <br /> approximately 15 (mean sea level datum) . Depth to groundwater is <br /> approximately 10 feet below ground surface. <br /> The locations of nearby irrigation, domestic and municipal wells <br /> are presently unavailable, but would be included in future <br /> reports . <br /> Offices throughout the U.S., Canada and Overseas <br /> Western offices in: Tempe, AZ; Concord, CA; Sacramento, CA; San Diego, CA; <br /> Torrance, CA; Ventura, CA;Englewood, CO;Renton, WA <br />