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CAMBRIA <br /> ,ENVIRONMENTAL HEA,JeT b'b$0N, 1998 <br /> 304 E tiWpber Ave Third Floor <br /> e ti P O'Box 388, Stockton CA 95201-0388 <br /> Mr Ron Rowe s Approved <br /> San Joaquin County Public Health Services Denied <br /> Environmental Health Division I,/ Conditions <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95201-0388 Datby <br /> Re Third Quarter 1998 Monitoring Report 1 � 517 vrHh 4-u-t,--�zATW <br /> Shell-branded Service Station 2 �� Q ,� �-moi Uri <br /> 341 East Main Street <br /> Ripon, California <br /> WIC #204-6562-0804 3 f N '-IhA- VWrtw r lUw- "A S <br /> Cambna Project#24-314-398 A--she 'IM 1)&-v e LJ P G ` `:�, <br /> wtUa�1PTuY+1'�— i�.o�� Tp P��z-i <br /> Dear Mr Rowe S <br /> On behalf of Equilon Enterprises LLC, Cambria Environmental Technology, Inc (Cambna) is <br /> submitting this ground water monitoring report in accordance with the reporting requirements of <br /> 23 CCR 2652d <br />. THIRD QUARTER 1998 ACTIVITIES <br /> Ground Water Monitoring Blaine Tech Services,Inc (Blaine)of San Jose,California gauged and <br /> sampled well MW-1 As requested by the San Joaquin County Public Health Services (SJCPHS), <br /> the ground water sample was analyzed for ethylene dibromide and 1,2-dichloroethane by EPA <br /> Method 8010 in addition to the existing analytes Cambria compiled the analytical data (Tables 1 <br /> and 2) and prepared a depth to ground water map (Figure 1) The Blaine report, presenting the <br /> laboratory report and supporting field notes, is included as Attachment A <br /> Soil and Ground Water Investigation Further subsurface investigation was requested by the <br /> SJCPHS in letters dated May 28, 1998 and July 7, 1998 The scope of work was outlined in <br /> Oakland CA Cambria's June 29, 1998 Investigation Work Plan Addendum #3 and July 10, 1998 Investigation <br /> Sonoma CA <br /> Portland, OR testing penetrometer Work Plan Addendum #4 and included cone 1� $ )(CPT , periodic ground water <br /> Seattle WA pumping from MW-1, and sampling of offsite wells Investigation Work Plan Addendum #4 also <br /> included a study of potential vertical and horizontal conduits and the results of a well survey that I <br /> Cambna <br /> Environmental Cambna performed of wells in the surrounding area The results of this phase of the investigation <br /> Technology, Inc were summarized in Cambria's August 17, 1998 CPT Investigation Report <br /> 1144 6511 Street <br /> Suite B <br /> Oakland CA 94608 <br /> Tel (510) 420-070o <br /> Fax (510) 420-9170 <br />