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URS <br /> Ms.Kathleen Amaru Page 5 <br /> Regional Water Quality Control Board—Central Valley Region <br /> ' July 31,2009 <br /> groundwater concentrations. The impacts appear to be migrating to the north, likely with the <br /> groundwater flow. Groundwater flow fluctuates from north to south with a varying shallow gradient <br /> (0.0002 to 0.002 feet/foot). Based on this data, it does not appear that the impacted groundwater is using <br /> the sewer lines as a preferential pathway. <br /> If you have any questions or comments regarding this report,please contact Mr. Vem Elarth at <br /> ' (916) 679-2299. <br /> Sincerely, <br /> URS Corporation Am 'cas �FtED Gfp�o <br /> PAUL <br /> ' No. 712 x <br /> Mar aret Ho aboom * Exp. 1 10 <br /> g Vernon Elarth,R.G.#7120 <br /> ' Geologist (P OF CAOFProgram Manager <br /> Enclosures: <br /> ' Figure 1 Site Vicinity Map <br /> Attachment A RWQCB Correspondence dated March 26,2009 <br /> ' Attachment B URS Correspondence Response to RWQCB Comments dated April 13, 2009 <br /> Attachment C GORE Surveys Final Report <br /> ' cc: Mr.A.K Jain—RESD <br /> Ms. Deborah Regoli—DVI <br /> Mr. Don Wilcoxen—DVI <br /> ' Mr. Jeff Palumbo—DVI <br /> Mr. Larry Anthony—DVI <br /> Mr. Jeremiah Peacock—Department of Corrections <br /> Mr. Gregor Larabee—Department of Corrections <br /> Mr. Bill Ott—Department of Corrections <br /> Ms. Lori Duncan—San Joaquin County Environmental Health Department <br /> ' Project File <br /> ' K9WpromsUkESDDVI-Rum Pil@009 Passive SG\Passive Sol Gm Survey Repon.doc <br />