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! t. <br /> CAMBRIA ' <br /> ,) + <br /> r � r ` <br /> January 7, 2005 <br /> Ms Vicki McCartney <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, 3rd Floor r 1 <br /> Stockton, California 95202-2708 <br /> Re Groundwater Monitoring Report -Third Quarter 2004 <br /> Shell-branded Service Station 3 <br /> 341 East Main Street �p�a <br /> Ripon, California <br /> SAP Code 135816 <br /> Incident No 98995874 <br /> SJCEHD Site Code 506186 <br /> Dear Ms McCartney Q <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 /> THIRD 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/chemical concentration map for <br /> the deep zone(Figure 2)and for the shallow zone (Figure 3) Blaine's report, presenting the third <br /> quarter 2004 laboratory report, supporting field notes, and the additional May- and June 20041 <br /> fvrr- <br /> monthly sampling results for well MW-6A, are included as Appendix A �s l <br /> The regular quarterly sampling event took place on July 1, 2004 -The analytical results for this <br /> sampling event contained sporadic low level detections of total petroleum hydrocarbons as <br /> gasoline (TPHg) and benzene,toluene, ethylbenzene, xylenes (BTEX) in all but one of the wells ` y <br /> These detections seemed anomalous and therefore the wells were resampled on <br /> September 1,2004 Laboratory reports for both sampling events are included in Appendix A, and <br /> the September 1, 2004 data is recorded in Blaine's table (Appendix A) <br /> vire <br /> .,/ <br /> Cambria We received the San Joaquin County Environmental Health Department letter dated <br /> Environmental <br /> Technology,Inc February 11, 2004 requesting that groundwater samples be analyzed on an annual basis for the <br /> seven fuel oxygenates and for lead scavengers This additional analysis occurred during the <br /> Perkins Street <br /> P 0 Box 259 second quarter 2004 sampling event and is shown on Blaine's table in Appendix A <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />