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Page 48 of 57 <br /> tiff euroflflS I 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 /> Project: Cordes Ranch, Hansen Road, Tracy, CA Method: EPA 82606 <br /> Page 6 of 8 <br /> Quality Control sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099.17796.8598 LCS Solid GC/MS Q 06/18/14 06/18/1411:13 1406181-012 <br /> Parameter Spike Added Conc.Recovered LCS° R c. ec <br /> Benzene %R Cl <br /> Qualifiers <br /> 50.00 48.86 98 78_120 <br /> Ethylbenzene 50.00 50.75 101 76-120 <br /> Toluene <br /> 50.00 49.55 gg <br /> 77-120 <br /> p/m-Xylene <br /> 100.0 104.6 105 75-125 <br /> o-Xylene 50.00 53.52 107 <br /> 75-125 <br /> U <br /> E <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 />