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+ s• <br /> 0 September 24, 2001 <br /> Mr. Sam Savig � U � <br /> San Joaquin County Public Health Services <br /> Environmental Health Division tHl K <br /> 304 East Weber Avenue, 3rd Floor PERMIT/SERVICES <br /> Stockton, California 95202 <br /> Re: Third Quarter 2001 Monitoring and Remediation Report <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, California <br /> Incident#9 8995 874 <br /> Cambria Project#243-0324-002 <br /> Jft SJCEHD Site Code: 506186 <br /> Dear Mr. Savig: <br /> On behalf of Equiva Services LLC (Equiva), Cambria Environmental Technology, Inc. (Cambria) <br /> is submitting this groundwater monitoring report in accordance with the reporting requirements of <br /> 23 CCR 2652d. <br /> THIRD QUARTER 2001 ACTIVITIES - <br /> Groundwater Monitoring: On July 10, 2001, Blaine Tech Services, Inc. (Blaine) of San Jose, <br /> California gauged and sampled all wells, and compiled the gasoline constituents data. Cambria <br /> prepared two groundwater elevation contour maps (Figures 1 and 2). Historic oxygenate <br /> analytical data are presented in Table 1, and compiled analytical data from the groundwater <br /> extraction (GWE) system are presented in Tables 2 and 3. Blaine's report, presenting the <br /> laboratory report and supporting field notes, is included as Attachment A. <br /> Interim Groundwater Remediation: Blaine began weekly purging of onsite monitoring well <br /> MW-1 on November 10, 1998 and onsite extraction well EW-1 on March 11, 1999. This practice <br /> continued until the GWE system was started in March 2000. <br /> Oakland, CA <br /> San Ramon, CA Groundwater Remediation System: Operation: Hydrocarbon and MTBE concentrations have <br /> S on o m a, CA been substantially reduced in extraction and monitoring wells across the site. During the <br /> Portland, 0R <br /> June 19, 2001 meeting with the Public Health Division of San Joaquin County Public Health <br /> Cambria ,Services, Equiva, and Cambria, it was agreed that Cambria will shut down the GWE system for <br /> Environmental the third and fourth quarters of 2001 and monitor groundwater concentrations. The GWE system <br /> Technology,Inc. <br /> was shut down on July 23, 2001. <br /> 04 65th Street <br /> Suite B <br /> Oakland,CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />