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Page 11 of 15 <br /> tiff eurofins Quality Control - LCS <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 5030C <br /> Method: EPA 82606 <br /> Project: Cordes Ranch, Hansen Road, Tracy, CA Page 2 of 2 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099-14-001.14774 LCS Aqueous ,GCIMS V V 07/30/14 07/30114 23:50 140730L038 . r'.. <br /> Parameter Spike Added Cone.Recovered LCS°/Rec. %Rec.CL Qualifiers <br /> Benzene 50.00 52.06 104 80-120 <br /> Ethylbenzene 50.00 54.21 108 80-123 <br /> Toluene 50.00 52.59 105 80-120 <br /> p/m-Xylene 100.0 111.0 111 75-123 <br /> o-Xylene 50.00 59.74 119 74-122 <br /> 8 <br /> rc <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 />