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Page 10 of 15 <br /> tiff eurofins Quality Control - LCS/LCSD <br /> Calscience <br /> Conestoga-Rovers&Associates Date Received: 07/30/14 <br /> 19449 Riverside Drive, Suite 230 Work Order: 14-07-2003 <br /> Sonoma, CA 95476-6955 Preparation: EPA 3510C <br /> Method: EPA 80158 (M) <br /> Project: Cordes Ranch, Hansen Road, Tracy, CA Page 1 of 2 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS/LCSD Batch Number <br /> 099.15.314-36 LCS Aqueous GC 47 08/01/14 0810211404:49 140801801 <br /> 099.15.314.36 LCSD Aqueous GC 47 08/01/14 0810211405:05 140801801 <br /> Parameter Spike Added LCS Conc. LCS LCSD Conc. LCSD ° Rea CL RPD RPD CL Qualifiers <br /> ° Rec. ° Rec. <br /> TPH as Crude Oil 2000 1946 97 1913 96 75-117 2 0-13 <br /> RPD:Relative Percent Difference. CL:Control Limits <br /> 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 <br />