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i <br /> 1CAMBRIA <br /> � March 6, 2000 <br /> Mr. Ron Rowe <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95201-0388 <br /> Re: Fourth Quarter 1999 Monitoring and Remediation Report <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, California <br /> Incident#98995874 <br /> Cambria Project#242-0324-002 <br /> SJCEHD Site Code: 506186 <br /> Dear Mr. Rowe: <br /> On behalf of Equiva Services LLC, Cambria Environmental Technology, Inc. (Cambria) is <br /> submitting this ground water monitoring report in accordance with the reporting requirements of <br /> 23 CCR 2652d. <br /> FOURTH QUARTER 1999 ACTIVITIES <br /> Ground Water Monitoring: Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged <br /> and sampled all wells and compiled the gasoline constituents data. Cambria compiled the <br /> additional constituents analytical data (Tables 1 and 2) and prepared a ground water elevation <br /> contour map (Figure 1). The Blaine report, presenting the laboratory report and supporting field <br /> notes, is included as Attachment A. <br /> Oakland, CA Interim Ground Water Remediation: Blaine began weekly purging of onsite monitoring <br /> well <br /> Sonoma, CA MW-1 on November 10, 1998, and onsite extraction well EW-1 on March 11, 1999. Cambria <br /> Portland, OR compiled the number of gallons removed and the analytical data on Table 1 and the oxygenate <br /> Seattle, WA compounds analytical data on Table 2. <br /> Cambria Ground Water Remediation: Cambria designed and installed a ground water extraction (GWE) <br /> Fnvirnnmon4al <br /> Technology, Inc. and treatment system. Permitting for the system is ongoing. <br /> W4 651h Street Well Installation: Cambria installed four ground water monitoring wells onsite and two <br /> Suite B <br /> Oakland, CA 946o8 monitoring wells offsite during the fourth quarter 1999. <br /> Tel (510) 420-0700 <br /> Fax(5io) 420-9170 <br />