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C A M B R I A <br /> September 8, 2004 <br /> Ms.Lori Duncan G ti L <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue,Third Floor $E (1 u4 <br /> Stockton,California 95202 <br /> Re: Well Destruction Report pEp;,;; <br /> Shell-branded Service Station <br /> 7910 Lower Sacramento Road <br /> Stockton, California <br /> SAP Code 136139 <br /> Incident No. 98996180 <br /> SJCEHD Site Code 1660 <br /> Dear Ms.Duncan: <br /> Cambria Environmental Technology, Inc. (Cambriay prepared this report on behalf of Equilon <br /> Enterprises LLC dba Shell Oil Products US to document the recent destruction of three <br /> groundwater monitoring wells (MW-1 through MW-3) at the referenced site. This work was <br /> performed in response to the San Joaquin County Environmental Health Department's <br /> (SJCEHD's) May 25,2004 letter, which recommended the destruction of existing site wells in <br /> order to proceed with case closure. Well destructions were performed to comply with SJCEHD <br /> and California Well Standards Well Destruction Guidelines. <br /> Site Description <br /> The site is an operating service station located on the northeastern corner of the intersection of <br /> Lower Sacramento Road and Hammer Lane in a commercial area of Stockton, California <br /> (Figure 1). The site layout consists of a service station building, three dispenser islands, three <br /> existing underground fuel storage tanks(USTs), and a former fuel UST complex(Figure 2). <br /> Monitoring Well Destructions <br /> Cambria obtained SJCEHD well destruction permit No. 38527 (Appendix A). On July 2, 2004, <br /> Cambria field staff observed Gregg Drilling and Testing, Inc. (Gregg) of Martinez, California <br /> Cambria destroy wells MW-1 through MW-3 by pressure-grouting. The well casings were filled with neat <br /> Environmental cement grout from the bottom up. Once the casings were filled with grout, pressure seals were <br /> Technology,Inc. placed on top of the well casings and additional cement grout was pumped under pressure into <br /> IsPerkins Street the well casings. This forces the grout through the well screens out into the filter pack material. <br /> P 0 Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />