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Chevron <br /> Chevron U.S.A. Inc. <br /> 2410 Camino Ramon, San Ramon, California • Phone 15101 B42-9600 <br /> Mail Address:P.O.Bax 5004,San Ramon,CA 94583-0904 ' <br /> 1 <br /> NOV 1 2 1991 <br /> Marketing Department <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES 7, 1991 <br /> Mr. Harlin Knoll <br /> San Joaquin County Environmental Health Department <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Chevron Station #9-8632 <br /> 575 West Grant Line Road(intersection of Grant Line and Tracy Blvd.),Tracy, CA <br /> Dear Mr. Knoll: <br /> This letter is in response to your letter to me dated September 12, 1991 regarding the site <br /> referenced above. As we discussed on the telephone on November 5, 1991, I do not feel that the <br /> groundwater information which I have reviewed compels me to initiate an investigation at the <br /> Chevron site. <br /> While it is true that groundwater samples from well MW-8, which is located on the sidewalk along ! <br /> the western boundary of the Chevron site, contain dissolved volatile hydrocarbons, it is also <br /> apparent that this well is located in a direction which is somewhat downgradient from the former <br /> Mobil branded station at 2375 Tracy Blvd. which has documented a release and has commenced <br /> investigative measures. Well MW-8 is also located in a direction which is directly downgradient of { <br /> an Exxon branded station at this intersection. I would like to point out that the groundwater <br /> information which I have reviewed (Alton Geoscience report for Mobil Oil dated December 17, <br /> 1990)indicates that the location of MW-8 is cross-gradient from the Chevron site. <br /> The purpose of this letter is not to "point fingers" at other parties in the vicinity, but merely to I <br /> explain why I do not feel at this time that an investigation b Chevron is justified <br />� P Y ga y based upon the <br /> circumstances described above. <br />! If you have any questions or comments, you may contact me at(510) 842-8658, <br /> Sincerely, i <br /> fi <br /> Clint B. Rogers <br /> Environmental Engineer <br /> J <br /> cc: Elizabeth Thayer, Central Valley RWQCB, Sacramento, CA <br /> David Noe, Mobil, 3800 W.Alameda Ave., Ste. 700, Burbank, CA 91505-4331 <br /> Peter DeSantis,BP, 2868 Prospect Park, Ste. 360, Rancho Cordova, CA 95670-6020 <br /> Al Sevilla,Alton Geoscience, Concord, CA <br /> #r <br /> f <br />