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Page 24 of 33 <br /> alscience <br /> AQ nvironmental Quality Control - LCS <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 82606 <br /> Project: Cordes Ranch, Hansen Road,Tracy, CA Page 3 of 4 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099-12-796-8521 LCS Solid GC/MSQ 05/28/14 05/29/1400:10 140528L033 <br /> Parameter Soike Added Conc.Recovered LCS%Rec <br /> Benzene ec CL Qualifiers <br /> 50.00 47.85 96 78-120 <br /> Ethylbenzene 50.00 48.48 97 76-120 <br /> Toluene 50.00 49.54 99 <br /> 77-120 <br /> p/m-Xylene <br /> 100.0 98.74 99 75-125 <br /> o-Xylene 50.00 50.43 101 <br /> 75-125 <br /> 0 <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 />