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Page 49 of 57 <br /> eurofins Quality Control - LCS <br /> Calscience <br /> Conestoga-Rovers&Associates Date Received: 06/14/14 <br /> 19449 Riverside Drive, Suite 230 Work Order: 14-06-1139 <br /> Sonoma, CA 95476-6955 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> Project: Cordes Ranch, Hansen Road,Tracy, CA Page 7 of 8 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099-12-796-8599 LCS Solid GC/MS Q 06/18/14 0611811411:13 14061SL022 <br /> Parameter Spike Added Conc.Recovered LCS%Rec. ° Rec.CL Qualifiers <br /> Benzene 50.00 48.86 98 78-120 <br /> Ethylbenzene 50.00 50.75 101 76-120 <br /> Toluene 50.00 49.55 99 77-120 <br /> p/m-Xylene 100.0 104.6 105 75-125 <br /> o-Xylene 50.00 53.52 107 75-125 <br /> U <br /> K <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 />