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a , <br /> *CA MB R I A <br /> 71 <br /> F-1 <br /> January 30;2001 <br /> Mr Jeffrey Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division o - <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report — Fourth Quarter 2000 <br /> Former Shell Service Station <br /> 880 Victor Road <br /> Lodi, California <br /> SAP Code 135446 <br /> Incident No 98995526 <br /> SJCPHS/EHD Site Code 1746 <br /> Dear Mr Wong <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equiva <br /> Services LLC (Equiva) in accordance with quarterly reporting guidelines issued by the Central <br /> Valley Regional Water Quality Control Board and San Joaquin County Public Health Services, <br /> Environmental Health Division (SJCPHS/EHD) <br /> FOURTH QUARTER 2000 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells <br /> and prepared a summary table of field gauging data and gasoline constituents (Appendix A) <br /> Cambria compiled the oxygenate and lead scavenger data (Table 1), prepared a site vicinity <br /> map (Figure 1), and prepared a groundwater contour/chemical concentration map (Figure 2) <br /> Blaine's report, presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED FIRST QUARTER 2001 ACTIVITES <br /> Blaine will gauge and sample the site wells according to the existing sampling schedule and will <br /> tabulate the data Cambria will prepare a groundwater monitoring report <br /> Oakland CA CONCLUSIONS AND RECOMMENDATIONS <br /> San Ramon CA <br /> Sonoma, CA <br /> Groundwater flow direction this quarter is northeasterly Past monitoring events indicate <br /> Cambria that the groundwater gradient is very flat and flow direction fluctuates beneath the site, <br /> Environmental <br /> nology,Inc although the predominant groundwater flow direction beneath the site appears to be to the <br /> northeast <br /> VO PerkmS Street <br /> r <br /> P O Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />