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'1 V!IE <br /> C A M B R I A JUL 2 6 2001 <br /> ENVi�. 1 1'1ALTH <br /> PLKi I, ._tI ICES July 24, 2001 <br /> Mr Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report — Second Quarter 2001, and <br /> Proposal for Water Well Destruction <br /> Shell-branded Service Station <br /> 3725 Tracy Boulevard <br /> Tracy, California <br /> SAP Code 136186 <br /> Incident No 98996222 <br /> Dear Mr Knoll <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equiva <br /> Services LLC in accordance with quarterly reporting guidelines issued by the Central Valley <br /> Regional Water Quality Control Board and San Joaquin County Public Health Services, <br /> Environmental Health Division (SJCPHS) <br /> SECOND QUARTER 2001 ACTIVITIES <br /> Groundwater Monitoring Blaine Tech Services, Inc (Blaine) of San Jose, California gauged <br /> and sampled all site wells and prepared a summary table of field gauging data and gasoline <br /> constituents Cambria prepared a site vicinity map (Figure 1) and a groundwater <br /> contour/chenucal concentration map (Figure 2) Blaine's report, presenting the laboratory report, <br /> is included as Appendix A <br /> Groundwater Remediatton Monthly groundwater extraction (GWE) using a vacuum truck <br /> began February 7, 2000 During the second quarter of 2001, a total of 22,709 gallons of <br /> groundwater was removed from wells MW-lA and BF-1 A summary of the volume of <br /> groundwater extracted at the site and an estimate of the amount of total purgeable hydrocarbons <br /> San Ramon, <br /> n, CA <br /> Oakland t A as gasoline (TPHg), benzene, and methyl tertiary butyl ether (MTBE) removed is presented in <br /> Sonoma CA Table I <br /> I <br /> Cambria Onsite Abandoned Water Well. During April 2001, Cambria located an abandoned water well <br /> Environmental <br /> Technology,Inc at the subject site The well is located in the planter along Tracy Boulevard (Figure 2) It is <br /> constructed of six-inch diameter steel casing and had a steel cap welded on top of the casing <br /> Perkins Street <br /> P 0 Box 259 The cap appeared to be to good condition and to be providing a good seal On May 23, 2001 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />