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Chevron <br /> Chevron U.S.A. Inc. <br /> 2410 Camino Ramon, San Ramon, California•Phone 14151842-9500 <br /> Wo Mail Address:P.O.Box 5004,San Ramon,CA 94583-0804 knf� oI ',.gg <br /> Marketing Oepartment SEP 16 144I <br /> ENVIPNO,i'--]IViENT AL 1-1EALTN <br /> PERMiT/SERVICES <br /> September 12, 1991 <br /> Ms. Mary Meays <br /> San Joaquin County Environmental Health <br /> P.O. Box 2009 <br /> Stockton, CA .95201 <br /> Re: Former Chevron Station#9-1918 <br /> 45 E. Harding Way,Stockton, CA <br /> l <br /> Dear Ms. Meays: <br /> Enclosed is a report dated August 21, 1991 -which was prepared by Chevron's consultant, <br /> Groundwater Technology, Inc. (GTI),to describe the installation and sampling of one groundwater <br /> monitoring well on July 16, 1991 at the site referenced above. € <br /> Soil samples from the boring were collected at five feet intervals for laboratory,analysis. The <br /> results indicate that the concentrations of hydrocarbons in the subsurface soils have decreased <br /> significantly since a vapor extraction and treatment system began operation in November 1990. <br /> The boring was completed as a groundwater monitoring well and a groundwater sample was <br /> collected for laboratory analysis. The results indicate that the groundwater does not contain <br /> benzene above the detection limit, nor does the ground contain levels of any BTEX <br /> constituent above California drinking water.standards. <br /> If you have any questions or comments, you may contact me at(510) 842-8658. <br /> Sincerely, <br /> Clint B. Rogers <br /> Environmental Engineer <br /> Enclosure <br /> cc: Elizabeth Thayer,Central Valley RWQCB,Sacramento, CA <br /> Geoffrey Bain(for Richard Blewett), 2146 Crestmoor Dr., San Bruno, CA 94066 <br /> Doug Oram, EA Engineering, Lafayette, CA <br /> r <br /> } <br />