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Chevron <br /> Chevron U.S.A. Products.Company <br /> 2410 Camino Ramon, San Ramon,.California•Phone (510).842-9500 <br /> Mail Addrem P0.Box 5004,San Aamon,CA 94583-0804rr <br /> . <br /> 4 I7t _ Yµs <br /> July 13, 1992 J U L 1 7 1992 j <br /> rz�aV_I^lO_QNP1AL-i:fNTA }fHIriALTi4 1 <br /> iA <br /> Ms. Mary Meays <br /> San Joaquin County Environmental Health'Department <br /> P.O. Box 2009 <br /> Stockton; CA 95201 <br /> Re: Former Chevron Station#9-7780 3246 East Fremont Street Stockton CA <br /> Attached groundwater monitoring report(Alton,-6/2/92) <br /> Request for closure <br /> Dear Ms.Meays: <br /> Attached is a report dated June,2, 1992, which was prepared by Chevron's consultant, Alton <br /> Geoscience(Alton),.to describe groundwater monitoring performed at the subject site on May 19, <br /> 1992. The monitoring event was requested in letters from San,Joaquin County (SJC) dated <br /> August 30, 1991 (attached) and the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) dated July 30, 1991 (attached). SJC and the.CVRWQCB indicated in these letters <br /> that site closure maybe granted after,completion of,"soil sampling in the former tank pit area and <br /> two rounds of groundwater sampling if no hydrocarbons were detected. <br /> The soil sampling was described in a report prepared by Chevron's consultant, Groundwater <br /> Technology Inc. (GTI), dated_ December 20, 1991. Soil samples were obtained every five feet <br /> from a depth of twenty feet down.to the groundwater table. None of the samples contained <br /> detectable levels'of total purgeable-hydrocarbons in the gasoline range (TPH-Gas) or benzene, <br /> toluene, ethylbenzene, or xylene (BTEX) with the exception'of the sample at 70 feet which <br /> contained only 0.013 parts-per milliod(ppm) xylene. <br /> Groundwater monitoring on October 18, 1991 and on May 19, 1992 did not detect any TPH-Gas <br /> or BTEX. <br /> In accordance with the.stipulations established by the CVRWQCB and SJC, Chevron believes that <br /> this site should now be closed and Would.appreciate your consideration of this;request. Upon your <br /> concurrence, Chevron will arrange for the proper abandonment of all'the groundwater monitoring <br /> wells at the site. If you have-any questions or comments, I can be reached at(510) 842-8658. <br /> Sincerely, <br /> Clint B_ Rogers <br /> Environmental.Engineer <br /> Site Assessment and Remediation <br />