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Page 10 of 15 <br /> aiscience <br /> nvironmental Quality Control - LCS/LCSD <br /> aboratories, Inc. <br /> Cardno ERI Date Received: 11/06/13 <br /> 601 North McDowell Blvd. Work Order: 13-11-0353 <br /> Petaluma, CA 94954-2312 Preparation: N/A <br /> Method: EPA TO-15M <br /> Project: ExxonMobil 99CAS/022789C Page 2 of 3 <br /> Quality Control Sample ID Matrix Instrument Date Prepared Date Analyzed LCS/LCSD Batch Number <br /> 099-12-983-3161 Air GC/MS AA N/A 11106113 03:32 1311061-02 <br /> Parameter Spike LCS LCS LCSD LCSD %Rec.CL RPD RPD CL Qualifiers <br /> Added Conc. %Rec. Conc. %Rec. <br /> Benzene 0.07987 0.08420 105 0.08454 106 60-156 0 0-40 <br /> Toluene 0.09421 0.1095 116 0.1117 119 56-146 2 0-43 <br /> Ethylbenzene 0.1086 0.1306 120 0.1332 123 52-154 2 0-38 <br /> p/m-Xylene 0.2171 02663 123 0.2724 125 42-156 2 0-41 <br /> o-Xylene 0.1086 0.1298 120 0.1321 122 52-148 2 0-38 <br /> Methyl-t-Butyl Ether(MTBE) 0.09013 0.09312 103 0.09336 104 50-150 0 0-35 <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 />