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Page 31 of 40 <br /> alscience <br /> nvironmenta/ Quality Control - LCS <br /> aboratories, Inc. <br /> Conestoga-Rovers&Associates Date Received: 07/17/13 <br /> 19449 Riverside Drive, Suite 230 Work Order: 13-07-1058 <br /> Sonoma, CA 95476-6955 Preparation: EPA 5030C <br /> Method: EPA 82608 <br /> Project: Cordes Ranch, Hansen Road,Tracy, CA Page 3 of 4 <br /> Quality Control Sample ID Matrix Instrument Date Analyzed LCS Batch Number <br /> 099-14-001-11450 Aqueous GUMS JJ 0711911314:35 1307191-01 <br /> Parameter Spike Added Cone.Recovered LCS%Rec. ° Rec.CL Quallfiers <br /> Benzene 50.00 45.50 91 80-120 <br /> Ethylbenzene 50.00 49.45 99 80-123 <br /> Toluene 50.00 47.12 94 79-121 <br /> p/m-Xylene 100.0 96.97 97 75-125 <br /> o-Xylene 50.00 47.63 95 75-125 <br /> E <br /> e <br /> K <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 />