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r � <br /> August 15, 2001 <br /> Ms, Margaret Lagorio AUG 2 0 2001 <br /> San Joaquin County Public Health Services <br /> Environmental Health Division E�11�1i , `"i H <br /> 304 East Weber Avenue, 3rd Floor F I, -' �[S <br /> Stockton, California 95202 <br /> Re: Second Quarter 2001 Monitoring and Remediation Report <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, California <br /> Incident#98995$74 <br /> Cambria Project#243-0324-002 <br /> SJCEHD Site Code: 506186 <br /> Dear Ms. Lagorio: <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 /> SECOND QUARTER 2001 ACTIVITIES <br /> Groundivater Monitoring: Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged <br /> and sampled all wells, and compiled the gasoline constituents data. Cambria prepared two <br /> groundwater elevation contour maps (Figures 1 and 2). Historic oxygenate analytical data are <br /> presented in Table 1, and compiled analytical data from the groundwater extraction (GWE) <br /> system are presented in Tables 2 and 3. Blaine's report, presenting the laboratory report and <br /> supporting field notes, is included as Attachment A. <br /> Interim Groundlvater Remediation: Blaine began weekly purging of onsite monitoring well <br /> 0 a k I a n d, CA MW-1 on November 10, 1998 and onsite extraction well EW-1 on March 11, 1999. This practice <br /> San Ramon, CA continued until the GWE system was started in March 2000. <br /> Sonoma, .CA. <br /> Cambria Groundwater Remediation: The GWE system, which extracts groundwater from well EW-1 at <br /> .s <br /> Environmernai approximateiy 5 gaiions per minute, was staried on March i0, 2000. Analyhcal tesuii� tlruut LIX <br /> Technology,Inc. GWE system are summarized in Table 2. Laboratory analytical reports for GWE system <br /> 044 65th Street sampling are included as Attachment B. An estimate of contaminant mass removed by the GWE <br /> Suite B system through March 27,2001 is included in Table 3 and summarized in the following table. <br /> Oakland.CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />