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Page 21 of 38 <br /> &'!,,science <br /> � � \N RCCpq� <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. " <br /> t 3 <br /> Cardno ERI Date Received: 12/03/11 <br /> 601 North McDowell Blvd. Work Order No: 11-12-0206 <br /> Petaluma, CA 94954-2312 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> Project ExxonMobil99CAS/022789C <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 11^12"0208-1 Aqueous GCINIS L 12/05111 12/85111 111205541 <br /> Parameter SPIKE ADDED MS%REC MSD %REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 10.00 86 89 76-124 4 0-20 <br /> Toluene 10.00 92 93 80-120 1 0-20 <br /> Ethylbenzene 10.00 90 89 78-126 1 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 10.00 81 88 67-121 7 0-49 <br /> Tert-Butyl Alcohol(TBA) 50.00 87 92 36-162 7 0-30 <br /> Diisopropyl Ether(DIPE) 10.00 79 88 60-138 10 0-45 <br /> Ethyl-t-Butyl Ether(ETBE) 10.00 82 86 69-123 5 0-30 <br /> Tert-Amyl-Methyl Ether(TAME) 10.00 87 88 65-120 1 0-20 <br /> Ethanol 100.0 69 95 30-180 32 0-72 <br /> 1,2-Dibromoethane 10.00 88 84 80-120 5 0-20 <br /> 1,2-Dichloroethane 10.00 93 97 80-120 4 0-20 <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714)895-5494 • FAX: (714)894-7501 <br />