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'o-ECENEDD <br /> 4 t <br /> AUG 1 1 2004 <br /> 41 A M B R I A ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> August 9, 2004 <br /> Ms Vickie McCartney Z.� <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95202 �� t <br /> Re Groundwater Monitoring Report- Second Quarter 2004 <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, California <br /> SAP Code 135816 <br /> Incident No 98995874 <br /> SJCEHD Site Code 506186 <br /> Dear Ms McCartney <br /> Cambria Environmental Technology, Inc (Cambria) is submitting this groundwater monitoring <br /> report on behalf of Equilon Enterprises LLC dba Shell Oil Products US (Shell) in accordance <br /> with the quarterly reporting requirements of 23 CCR 2652d <br /> • SECOND QUARTER 2004 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled selected wells <br /> and prepared a summary table of field gauging and laboratory analytical data Cambria prepared <br /> an area well survey map (Figure 1) and a groundwater contour/chen-ncal concentration map for <br /> the deep zone (Figure 2) and for the shallow zone (Figure 3) Blaine's report, presenting the <br /> second quarter 2004 laboratory report, supporting field notes, and the additional February and <br /> March 2004 monthly sampling results for well MW-6A, are included as Appendix A <br /> We received the San Joaquin County Environmental Health Department letter dated <br /> February 11,2004 requesting that groundwater samples be analyzed on an annual bans for the <br /> seven fuel oxygenates and for lead scavengers This additional analysis occurred during the <br /> second quarter 2004 sampling event and is shown on Blaine's table in Appendix A <br /> GROUNDWATER REMEDIATION <br /> Cambria Interim Groundwater Remediation Blaine began weekly purging of onsite monitoring well <br /> e.... ....+moi <br /> ivi -i on Novemner 10, 1998 ani onsite extraction well hw-1 on March 11, 1999 This practice <br /> Technology,Inc ' <br /> continued until the groundwater extraction (GWE) system was started during March 2000 <br /> *PerkinsStTeel <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />