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TEG Northern Eallfurnia Inc. <br /> 17 November 2010 <br /> Mr. Dan Schreiner <br /> Stantec Consulting <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> SUBJECT: DATA REPORT - Stantec Consulting #211402828.300.260 <br /> 666 West Weber Avenue, Stockton, California <br /> TEG Project#01022F <br /> Mr. Schreiner: <br /> Please find enclosed a data report for the samples analyzed from the above referenced project for <br /> Stantec Consulting. The samples were analyzed on site in TEG's mobile laboratory. TEG conducted a <br /> total of 30 analyses on 15 soil vapor samples. <br /> -- 15 analyses on soil vapors for BTEX, naphthalene, 5 oxygenates and TPH by EPA method 8260B. <br /> -- 15 analyses on soil vapors for methane by GC/TCD. <br /> The results of the analyses are summarized in the enclosed tables. Applicable detection limits and QA/QC <br /> data are included in the tables. <br /> 1,1 difluoroethane was used as a leak check compound during the soil vapor sampling. No <br /> 1,1 difluoroethane was detected in any of the vapor samples reported at or above the DTSC recommended <br /> leak check compound reporting limit of 10 µg/L of vapor. <br /> TEG appreciates the opportunity to have provided analytical services to Stantec Consulting on this project. <br /> If you have any further questions relating to these data or report, please do not hesitate to contact us. <br /> Sincerely, <br /> Mark Jerpbak I <br /> Director, TEG-Northern California NOV 2 2 2010 <br /> B'I ---- <br /> 1135❑ Monier Park Place. Rancho Cordova, CA 95742 Phone [9151 053.0010 Pax (915) 853-8020 <br />