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Chemn <br /> Chevron <br /> Y c, <br /> ` Vl <br /> 30 Chovron U.SA Products Company <br /> 6001 Ballinger Canyon Rd., Bldg. L <br /> P.O. Box 5004 <br /> San Raman,CA 94583-0804 <br /> Site Assessment&Remediation Group <br /> Phone(510)842-9500 <br /> October 6, 1995 <br /> Ms. Diane Hinson <br /> San Joaquin County Environmental Health <br /> P.O.Box 388 <br /> Stockton, CA 95201-0388 <br /> Re: Chevron Station#9-1452, 334 E.Main St.,Ripon, CA <br /> Attached Soil Analytical Results(Sequoia Analytical) <br /> Dear Ms.Hinson: <br /> By way of this letter, Chevron would like to propose a plan for your acceptance to offhaul and dispose of <br /> soil stockpiles that have been generated at the subject site during recent underground storage tank(UST) <br /> removal and additional soil excavation activities. <br /> There were approximately two hundred cubic yards of soil stockpiled at the subject site as a result of fuel <br /> UST(and associated piping)removal activities that occurred on September 27, 1995. Eight grab soil <br /> samples,each representing approximately twenty five cubic yards,were collected from this stockpile by a <br /> representative of Touchstone Developments under the supervision of Robert McClellon(San Joaquin <br /> County Public Health Services, SJCPHS)on September 27, 1995.The samples were designated as SP-la <br /> through SP-ld and SP-2a through SP-2d.The eight samples were composited into two separate samples <br /> (SP-1 a-d and SP-2 a-d)at a state-certified laboratory and analyzed for TPHGas,BTEX and total lead in <br /> accordance with Chevron's designated landfill requirements. Copies of the respective chain of custody and <br /> analytical results are attached for your review. <br /> There were approximately 30-40 cubic yards of soil stockpiled at the subject site as a result of the used oil <br /> UST removal on September 27, 1995.Four composite samples(DOSP-1 a-d)were collected by <br /> Touchstone and witnessed by SJCPHS on that same day. The samples were later composited in the <br /> laboratory and analyzed for volatile organic compounds(EPA 8240), semi-volatile organic compounds <br /> (EPA 8270),total recoverable petroleum hydrocarbons(EPA 418.1),total lead,and CAM 17 metals to <br /> meet landfill acceptance criteria.The respective chain of custody and analytical results are attached for <br /> your review. <br /> In addition to the above-mentioned soil volumes,Chevron proposes to offhaul and dispose of two <br /> additional soil stockpiles. One stockpile represents approximately forty cubic yards of soil that was <br /> generated on October 2, 1995 during the removal of excess bacMI remaining in the former fuel UST pit <br /> and during the deepening of the same pit from approximately thirteen feet below ground surface to <br /> approximately seventeen feet below ground surface beneath the location of Touchstone's previously <br />