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S f <br /> C A M B R I A 0W1 D <br /> FEB Z 9 2002 <br /> ENVIRUIIIMENI HIALTH February 14, 2002 <br /> Mr Harlin Knoll PERMIT/SERVICES <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E Weber Avenue,Third Floor <br /> Stockton,California 95202 <br /> Re Groundwater Monitoring Report - Fourth Quarter 2001 <br /> Shell-branded (Independent) Service Station <br /> 420 West Kettleman Lane <br /> Lodz,California <br /> SAP Code 135445 <br /> Incident No 98995525 <br /> SJCPHS/EHD Site Code 19061 <br /> Dear Mr Knoll <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 (RWQCB) and San Joaquin County Public Health <br /> Services,Environmental Health Division(SJCPHS/EHD) <br /> FOURTH QUARTER 2001 ACTIVITES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells <br /> monthly The November 2001 event was coordinated with the former Chevron station located at <br /> 301 West Kettleman Lane Blaine prepared a summary table of field gauging data and gasoline <br /> constituents Cambria prepared a site vicinity map (Figure 1), an extended site trap (Figure 2), <br /> and a groundwater elevation or contour/chemical concentration map for each month (Figures 3 <br /> through 5) Blaine's report, presenting the laboratory reports, is included as Appendix A, and <br /> tables summarizing the former Chevron well gauging and analytical data for November 2001 are <br /> included as Appendix B <br /> The groundwater contour snap was prepared using the November 2001 data from both the Shell <br /> Oakland CA and Chevron sites A review of the Shell data only for all three months indicates that onsite <br /> San Ramon CA <br /> Sonoma CA groundwater flow direction beneath the Shell site remains toward the southwest Please note that <br /> the groundwater elevations for the Shell wells reported in the second and third quarter 2001 <br /> cambria groundwater monitoring reports were incorrect The erroneous survey data and groundwater <br /> Environmental <br /> OeTkins <br /> echnology,Inc elevations have been corrected in Blaine's table (Appendix A) <br /> Street <br /> P o Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />