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arevron <br /> a Chevron <br /> r <br /> Chevron Products Company <br /> March 3, 1997 6001 Bollinger Canyon Road <br /> Building L <br /> San Ramon CA 94583 <br /> P 0 Box 6004 <br /> San Ramon CA 94583-0904 <br /> Mr Ron Rowe <br /> San Joaquin County Public Health Services Phone 510 4 Sales West <br /> q t3' Phone 510 842-9500 <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> Re Chevron Station #9-1452 334 E Main St Ripon, CA <br /> Attached Groundwater Monitoring Report(Blaine Tech, 12/3/96) <br /> Dear Mr Rowe <br /> Please find attached a report dated December 3, 1996,which was prepared by Chevron's consultant, <br /> Blaine Tech Services, Inc (Blaine Tech),to describe the results of groundwater monitoring that was <br /> performed at the subject site on November 5, 1996 <br /> .1 <br /> Blaine Tech gauged and sampled three of the four site-related wells during their November site visit Well <br /> MW-3 was inaccessible Groundwater samples were each analyzed for TPHGas, BTEX constituents and <br /> MTBE The measured direction of groundwater flow was southwesterly There were no detectable <br /> concentrations of petroleum hydrocarbons or MTBE measured at any of the wells These data are <br /> consistent with previous site monitoring data <br /> The historic sampling results have demonstrated that there are no motor fuel hydrocarbons in <br /> groundwater These results also suggest that there are no residual sources of hydrocarbons remaining in <br /> soil This information agrees with soil data obtained during UST removal activities and subsequent site <br /> investigations As such, Chevron recommends that this site be considered for case closure In order to <br /> facilitate your consideration, Chevron will instruct its consultant to prepare a case closure summary <br /> report The summary report will be submitted to your agency on or before April 15, 1997 Included in the <br /> summary report will be groundwater monitoring data that was collected last month In the meantime all <br /> further groundwater monitoring will be suspended <br /> If you have any questions or comments, please contact me at(510) 842-8695 <br /> Sincerely, <br /> & 14YJ- <br /> • Brett L Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br />