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F r nR - — - - — <br /> 7-Eleven Store#20632 <br /> • Offsite Assessment Report <br /> May 18, 2005 <br /> Page 5 <br /> reportable concentration of MtBE in SB-3A The lateral extent of petroleum hydrocarbons in soil <br /> has been defined to the south (SB-1 B) and to the southwest (SB-2B) <br /> Grab groundwater samples did not contain reportable concentrations of BTEX or TPHg Due to <br /> the high concentrations of MtBE and TBA present In SB-2A and the near non-detect <br /> concentrations in SB-113, SB-213 and SB-3B, it appears that the fill material associated with the <br /> EBMUD pipeline Immediately adjacent to the site may be acting as a conduit for flow of <br /> contaminated groundwater <br /> Due to the sensitive nature of working around the EBMUD pipeline, SECOR requests the <br /> opportunity to discuss possible remedial action with EBMUD, SJCEHD and the Regional Water <br /> Quality Control Board (RWQCB) <br /> Should you have any questions regarding this report, please contact the undersigned at (916) <br /> 861-0400 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Damon Brown Jaff Auchterlonle <br /> Staff Geologist 0 GE ZO Senior Geologist <br /> R, �cs' <br /> Daniel J avis, R G ,DWyi,S � <br /> Senior Geologist <br /> X60 6435 <br /> Figures <br /> Tables � r SFO <br /> Attachment A- Regulatory C F and Permits <br /> Attachment B - Field Notes <br /> Attachment C -Waste Disposal Documentation <br /> AttachmentD-Certified Laboratory Analytical Reports and Chairs-of-Custody Documentation <br /> cc File, 7-Eleven, Inc <br /> Mr James Brathovde, RWQCB <br /> 1 17-Elevenl7-11 5tores1206321Reports120632 Assessment Report 05-8-05 doc <br />