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� ' -" _-� - .'a.' ,�•; ..-- ,•�,,r - _ s' �s._'` 5. ;�-' .r- ,. _.*_ ""' .f SYr ' mss <br /> L <br /> -'-- GROUNDWATER <br /> TECHNOLOGY INC. <br /> 140i Haly-anl Urise,Suite 140,Brest Sacramento,CA 95691,016)372-4700 <br /> rAS1910372-8781 <br /> August 14, 1990 Project No. 2021150-4150 <br /> Ms. blanc Hinson <br /> ED <br /> San Joaquin Public Health Services AUG 1 6 1990 <br /> Environmental Health Division <br /> P. o. Box 2009 ENVIRONMENTAL HEALTH <br /> Stockton, CA 95201 PERMIT/SERVICES <br /> RE: TEXACO SERVICE STATION <br /> 440 WEST CHARTER WAY <br /> STOCKTON,CALIFORNIA <br /> Dear Ms. Hinson: <br /> Enclosed are the laboratory results of the fecal coliform analyses for monitoring wells(MWs) 6 and 7 at <br /> the above-referenced site, As required by San Joaquin Public Health Services,fecal coliform analyses <br /> were conducted on these wells because their locations were not in conformance with the setback <br /> requirement of 50 feet from a sanitary sewer. MW-10 was not sampled because of an obstruction within <br /> the well <br /> Sampling of these wells was conducted on July 19, 1990. Laboratory analyses indicate fecal coliform <br /> concentrations of<2 colony count per 100 milliliters of samples. A copy of the laboratory report has been ' <br /> enclosed for your reference. <br /> These wells have not contained detectable concentrations of fecal coliform in any of the three sampling <br /> events, (May,June,and July 1990). Therefore, Groundwater Technology would like to request that the <br /> sampling frequency be reduced to every six months. If the request meets with your approval, please <br /> notify our office at your earliest convenience. <br /> Please contact Grcundwater Technology's West Sacramento office if you have questions or comments, <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY, !NC. <br /> MARTIN J. STENDORF J N E. BOWER <br /> Project Geologist Envircri ental Geologist <br /> Project Manager <br /> MJO/JEB:rs <br /> Enclosures <br /> cc: Mr. R.W.Conlon,Texaco Refining and Marketing Inc, <br /> Mr.Dave Heinrich,Texaco Refining and Marketing,:ne, <br /> Offices 1hn:uyhwif the U3.,Canada and Orerseas <br />