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_ w r <br /> Chevron <br /> mT <br /> U�! • ,y <br /> 0: 12 1 <br /> Chevron U.S.A.Products Company <br /> 6001 Ballinger Canyon-Road <br /> July 17, 1996 Building L <br /> San Ramon,CA 94583 <br /> PO.'Box 5004 <br /> San Ramon,CA 94583-0804 , <br /> Mr. Harlin Knoll Marketing—Northwest Region <br /> San Joaquin County Public Health Services Phone 510 842 9500 <br /> P.O.-Box 388 r <br /> Stockton, CA 95201-0388 <br /> Re: Chevron Station#94183, 236'N,Ham Lane,Lodi,CA l <br /> Attached Groundwater Monitoring Rep oil(Blaine Tech, 3128196) 'II <br /> . i <br /> 1 <br /> i <br /> Dear Mr..Knoll: <br /> , <br /> Please find attached a report dated March 28, 1996,which was prepared by Chevron's consultant,Blaine <br /> Tech Services,Inc. (Blaine tech),to describe the results of groundwater.monitoring that was performed at <br /> the subject site on February 22, 1996- <br /> During their February site visit.Blaine Tech gauged and sampled all four,site-related wells. The measured. <br /> direction of groundwater flow was toward the southwest. Groundwater samples from all four-wells were - <br /> analyzed for the presence of TPHGas,BTEX.constituents,and MTBE. In addition,-samples from well <br /> MW-3 were analyzed for TPHDiesel;halogenated volatile organic.compounds(14VOC's), semi-volatile <br /> organic compounds(SVOC's),and dissolved metals. There.were no detectable concentrations of <br /> petroleum hydrocarbons measured at any well. A single.detection(4.5 ppb)of MTBE was measured'at <br /> well MW 2. Trace concentrations of tetrachloroethene were detected at well MW-3. No SVOC's were <br /> detected. The measured concentration of dissolved Zinc at MW-3 is thought to be representative of <br /> background levels. All other metals were non-detect:These analytical results,were presented in Blaine <br /> Tech's report dated June 7, 1996, which has already been submitted to your agency. <br /> I apologize for the late transmittal of this report. If you have any questions or comments, I can be reached" <br /> at(510) 842-8695. <br /> Sincerely, <br /> Brett L.Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br />