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Page 13 of 19 <br /> OF eurofins Quality Control - LCS <br /> Calscience <br /> Conestoga-Rovers&Associates Date Received: 06/28/14 <br /> 19449 Riverside Drive, Suite 230 Work Order: 14-06-2155 <br /> Sonoma, CA 95476-6955 Preparation: EPA 5030C <br /> Project: Cordes Ranch, Hansen Road, Tracy, CA Method: EPA 8260BPage 3 of 3 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099.14-001-14586 LCS Aqueous GC/MSZ 07/01/14 07/01/1410:25 140701 L050 <br /> Parameter Soike Added Conc.Recovered LCS%Rec <br /> Rec CL Qualifiers <br /> Benzene <br /> 50.00 50.46 101 80-120 <br /> Ethylbenzene 50.00 52.05 104 80-123 <br /> Toluene 50.00 <br /> 51.94 104 80-120 <br /> p/m-Xylene 100.0 <br /> o-Xylene 105.7 106 75-123 <br /> 50.00 56.21 112 74-122 <br /> U <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 />