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Page 25 of 33 <br /> Calscience <br /> Quality Control - LCS <br /> environmental <br /> aboratories, Inc. <br /> Conestoga-Rovers&Associates Date Received: 05/28/14 <br /> 19449 Riverside Drive, Suite 230 Work Order: 14-05-1970 <br /> Sonoma, CA 95476-6955 Preparation: EPA 5030C <br /> Method: EPA 82609 <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 /> 099-12-796-8523 LCS Solid GC/1VIS XX 05/29114 0512911410:29 1405291.005 <br /> Parameter Spike Added Conc.Recovered LCS%Rec. ° Rea CL Qualifiers <br /> Benzene 50.00 45.29 91 78-120 <br /> Ethylbenzene 50.00 49.46 99 76-120 <br /> Toluene 50.00 46.61 93 77-120 <br /> p/m-Xylene 100.0 105.4 105 75-125 <br /> o-Xylene 50.00 54.64 109 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 />