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f r <br /> �. Ms.Lori Duncan <br /> June 12,2007 <br /> CONESTOGA-ROVERS <br /> &ASSOCIATES <br /> CLOSING <br /> If you have any questions regarding the contents of this document,please call Mike Murphy at(707)933- <br /> 2367. <br /> I, Sincerely, <br /> Cambria Environmental Technology, In C. <br /> r k �_ <br /> r� <br /> � g <br /> a C kAf dYL s <br /> Aq w <br /> Mike Murphy Dan Lescure u" Il'� ,i�� <br /> 211Figures: 1 -Vicinity Map <br /> 2—Groundwater Contour and Chemical Concentration Map_ <br /> 3—Geologic Cross Section A-A' <br /> 4--First Quarter 2007 MTBE"Isoconcentration Contour Map <br /> Tables: l W,]I/Boring Data . <br /> 2—Estimated MTBE Mass Remaining in Groundwater <br /> 3—Mass Removal Data I <br /> Attachments: A-Historical-Groundwater Monitoring Data <br /> I <br /> cc: Mr,Denis Brown, Shell . <br /> i Mr. James Barton,Regional Water Qgality Control Board <br /> BSonoma.ShelllTracy 2375 west Grant Line RoadIREPORTSWass Flux Eva111667 Mass Flux Evaluation,doc <br /> Conestoga-Rovers&Associates(CRA)prepared this document for use by our client and-appropriate regulatory agencies. It is <br /> based partially on information available to CRA from outside sources and/or in the public domain,and partially on information <br /> supplied by CRA and its subcontractors."CRA makes no warranty or guarantee,expressed or implied,included or intended in <br /> this document, with respect to the accuracy of information-obtained from these outside sources or the public domain,or any <br /> conclusions or recommendations based.on information that was not independently verified by-CRA. This document represents <br /> the best professional judgment of CRA. None of the work performed hereunder constitutes-or shall be represented as a legal <br /> opinion of any kind or nature. <br /> 1667 8 <br /> Worldwide Engineering,Environmental,Construction,and IT Services <br />