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Page 9 of 15 <br /> alscience <br /> r 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 1 of 3 <br /> Quality Control Sample ID Matrix Instrument Date Prepared Date Analyzed LCS/LCSD Batch Number <br /> 099-12-983-3160 Air GCIMS K N/A 11/06/1318:07 13110611-02 <br /> Parameter Spike LCS LCS LCSD LCSD %Rec.CL RPD RPD CL Qualifiers <br /> Added Conc. %Rec. Conc. %Rec. <br /> Benzene 0.07987 0.07888 99 0.07885 99 60-156 0 0-40 <br /> Toluene 0.09421 0.09380 100 0.09575 102 56-146 2 0-43 <br /> Ethylbenzene 0.1086 0.1079 99 0.1081 100 52-154 0 0-38 <br /> p/m-Xylene 0.2171 0.2207 102 0.2215 102 42-156 0 0-41 <br /> o-Xylene 0.1086 0.1082 100 0.1087 100 52-148 0 0-38 <br /> Methyl-t-Butyl Ether(MTBE) 0.09013 0.08742 97 0.08842 98 50-150 1 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 />