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i <br /> hI <br /> 12 June 2007 <br /> Mr. Eric Phce opy . <br /> Geological Technics Inc. <br /> 1101 7"' Street <br /> Modesto, CA 95354 <br /> :SUBJECT: DATA REPORT - Geological Technics Inc. Project# 1030.2 <br /> 3780 West Linne Road, Tracy, California <br /> I <br /> TEG Project#70524F <br /> Mr. Price: <br /> Please find enclosed a data report for the samples analyzed from the above referenced project for <br /> Geological Technics Inc. The samples were analyzed on site in TEG's mobile laboratory. TEG conducted a <br /> total of 6 analyses on 6 soil vapor samples. <br /> -- 6 analyses on soil vapors for aromatic volatile hydrocarbons (BTEX), methyl-t=butyl ether(MTBE), and <br /> total petroleum hydrocarbons-gasoline by EPA method 82648. <br /> The results of the analyses are summarized in the enclosed tables. Applicable detection limits and <br /> calibration data are included in the tables. <br /> i; <br /> 4 1,1 difluoioethane was used as a leak check compound around the probe rods during the soil vapor <br /> sampling? No 1,1 difluoroethane was detected in any of the vapor samples reported at or above the.DISC <br /> i, recommended leak check compound"rreporting limit of 10µglL of vapor: <br /> i <br /> TEG appreciates the opportunity to have provided analytical services to Geological Technics Inc. on this <br /> project. If you have any further questions relating to these data or report, please do not hesitate to contact <br /> us. <br /> Sincerely; <br /> Mark Jerpbak <br /> Director, TEG-Northern California <br /> Mobile and i_aboratoryAnalyticaIServices Environme.ntalSubconsulting Geochemical11&D Soil Vapor Surveys. AlrMonitoring <br /> 11350 Monier Park Place, Rancho Cordova, CA 95742 Phone: (916) 853-8010 Fax: (916) 853-8020 <br /> i <br />