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Page 50 of 57 <br /> tiff eurofins 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 /> Method: EPA 82608 <br /> Project: Cordes Ranch, Hansen Road,Tracy, CA Page 8 of 8 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 09942.796-8601 LCS Solid GC/MS Be 06/16/14 06/16/1412:05 140616L031 <br /> aram ter Scike Added Conc.Recovered LCS° Rec. %Rec CL Qualffiers <br /> Benzene 50.00 40.63 81 78-120 <br /> Ethylbenzene 50.00 45.70 91 <br /> 76-120 <br /> Toluene 50.00 41.80 84 <br /> 77-120 <br /> p/m-Xylene 100.0 93.48 93 75-125 <br /> o-Xylene 50.00 47.24 94 75-125 <br /> V <br /> ll <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 />