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[hwmn <br /> r� <br /> Chevron <br /> Chevron Products Company <br /> February 28, 1997 6001 Bollinger Canyon Road <br /> Building L <br /> San Ramon CA 94583 <br /> PO Box 6004 <br /> San Ramon CA 94583 0904 <br /> Mr Harlin Knoll <br /> San Joaquin County Public Health Services Marketing—Sales West <br /> P O Box 388 Phone 510 842 9500 <br /> Stockton, CA 95201-0388 <br /> Re Chevron Station# 9-2033 508 W Charter Way, Stockton CA <br /> Attached Groundwater Monitoring Report(Blaine Tech, 414196) <br /> Dear Mr Knoll <br /> Attached you will find a report dated April 4, 1996, which was prepared by Chevron's consultant, Blaine <br /> Tech Services Inc (Blaine Tech), to describe the results of groundwater momtonng that was performed at' <br /> the subject site on February 27, 1996 <br /> In February, Blaine Tech gauged and sampled all three site-related wells The measured direction of <br /> groundwater flow beneath the site was generally toward the south All groundwater samples collected <br /> were analyzed for the presence of TPHGas and BTEX constituents In addition, samples from well MW-1 <br /> were analyzed for waste oil constituents <br /> There were detections of dissolved petroleum hydrocarbons measured at wells MW-1 and MW-3 The <br /> measured concentrations of dissolved hydrocarbons were slightly lower than those previously detected at <br /> these wells The observed decrease in concentrations may be associated with groundwater levels being <br /> above the screened intervals in these wells (0 6 - 1 98 ft) There were no dissolved hydrocarbons detected <br /> at well MW-2 There were also detections of 1,2 Dichloroethane and TPHDieseI-range hydrocarbons at <br /> well MW-1 The measured levels were consistent with those detected previously <br /> If you have piny questions or comments, I can be reached at(5 10) 842-8695 <br /> Sincerely, <br /> / �_ ILS <br /> Brett L Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> Attachment <br /> cc Elizabeth Thayer, Central Valley RWQCB, Sacramento, CA <br /> Mrs Pearl Myer, 1120 South Hunter Street, Stockton, CA 95206 <br /> Bette Owen, Chevron Products Company, San Ramon, CA (w/o attachment) <br /> ; J, <br />