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Page 25 of 31 <br /> alscience <br /> nvironmental Quality Control - LCS <br /> F. aboratories, Inc. <br /> Conestoga-Rovers&Associates Date Received: 05122/14 <br /> 19449 Riverside Drive, Suite 230 Work Order: 14-05-1684 <br /> Sonoma, CA 95476-6955 Preparation: EPA 5030C <br /> Method: EPA 82608 <br /> Project: Cordes Ranch, Hansen Road, Tracy, CA Page 4 of 4 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099.12-796-8510 LCS Solid GC/IVIS Q 05123/14 0512311413:20 140523L035 <br /> Parameter Soike Added Conc.Recovered LCS°/Rec. %Rec.CL Qualifiers <br /> Benzene 50.00 51.07 102 78-120 <br /> Ethylbenzene 50.00 48.73 97 76-120 <br /> Toluene 50.00 49.79 100 77-120 <br /> p1m-Xylene 100.0 95.53 96 75-125 <br /> o-Xylene 50.00 49.64 99 75-125 <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 />