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IL 1 A S <br /> C A M B R I A <br /> March 22, 2004 <br /> Ms Vickie Mc Cartney <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, 3 Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report— First Quarter 2004 <br /> MAR 2 4 2004 <br /> Shell-branded Service Station ENVIR)NMECJ HEALTH <br /> 1071 North Main Street PERMIT/SERVICES <br /> Manteca, California <br /> SAP Code 135570 f L`1169 q <br /> Incident No 98995643 1 <br /> SJCEHD Site Code 506313 <br /> Dear Ms McCartney <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equilon <br /> Enterprises LLC dba Shell Oil Products US (Shell) in accordance with the quarterly reporting <br /> requirements of 23 CCR 2652d <br /> • FIRST QUARTER 2004 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells and <br /> prepared a summary table of field gauging and laboratory analytical data Cambria prepared an <br /> area well survey map (Figure 1) and a groundwater contour/chemical concentration map <br /> (Figure 2) Blaine's report, presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED SECOND QUARTER 2004 ACTIVITIES <br /> Blaine will gauge and sample the site wells and tabulate the data Cambria will prepare a <br /> monitoring report We will evaluate this site for closure per San Joaquin County Environmental <br /> Health Department's November 12, 2003 letter <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> The concentration of gasoline constituents detected in groundwater samples during this quarter's <br /> Cambria monitoring event are consistent with the historical norm for this site <br /> Environmental <br /> Technology, Inc <br /> Werkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95416 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />