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HARGI�S+ASSOCIATES INC. Dodd R. Hargis, Ph.D., R G <br /> / Michael R. Long, R.G. <br /> Consultants in Hydrogeology Terry M Turner, R G. <br /> Roger A.Niemeyer, R.G. <br /> 2223 Avenida De La Playa Suite 300 Leo s Leonli Ph.D, R.G. <br /> Lancto Jolla, California 92037 Pete,T Raymond <br /> Peter Quinlan <br /> (619) 454-0165 <br /> pi <br /> lelecoer(619)454-5839 <br /> September 2, 1988 <br /> VIA FEDERAL EXPRESS <br /> R , StKv <br /> Ms. Laurie Cotulla <br /> SAN JOAQUIN LOCAL HEALTH DISTRICT <br /> 1601 E. Hazelton Avenue <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Exploratory Boring Near California Water Service Well CWS20 <br /> Marley Cooling Tower Company Facility, Stockton, California <br /> Dear Ms. Cotulla: <br /> As Gary Reents and Gary Vargas have discussed with you, Hargis + <br /> Associates, Inc. plans to drill an exploratory boring adjacent to California <br /> Water Service Well CWS20 as part of our continuing groundwater investigation <br /> at the Marley Cooling Tower Company facility. <br /> The exploratory boring will be drilled using mud rotary drilling method <br /> to a total depth of approximately 500 feet. The exploratory boring will be <br /> a maximum of 6 inches in diameter. It is anticipated that the drilling of <br /> the exploratory borehole will take three to four days. Positive hydrostatic <br /> pressure will be maintained in the borehole 24 hours a day. Upon reaching <br /> the total depth of the boring it will be geophysically logged. Immediately <br /> following the geophysical logging of the exploratory boring, it will be <br /> abandoned by pressure grouting the borehole with neat cement from the bottom <br /> to land surface using a tremie pipe. <br /> The exploratory boring will be located approximately 100 feet east of <br /> Oro Avenue in east Stockton (Figure 1). The boring will be at least 50 feet <br /> away from California Water Service Well CWS20 and 10 feet away from the <br /> property boundaries. <br /> If you have any questions, please contact me at the Marley Cooling <br /> Tower Company facility at (209) 465-3451 from Tuesday, September 6 through <br /> Friday, September 9. <br /> Sincerely, <br /> HARGIS + ASSOCIATES, INC. <br /> K 4� Fo/2 <br /> Peter T. Quinlan <br /> Senior Hydrogeologist <br /> PTQ/bm Phoenix office: Tucson office: <br /> Enclosure 2222 South Dobson Road Suite 401 3385 North Campbell Avenue Suite 121 <br /> Mesa,Arizona 85202 Tucson,Arizona 85719 <br /> (602)345-0888 (602)881-7300 <br />