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Page 27 of 36 <br /> alscience ttA ACCO4 <br /> .0qr <br /> nvironmental Quality Control - LCS/LCS Duplicate <br /> aboratories, Inc. x <br /> Cardno ERI Date Received: N/A <br /> 601 North McDowell Blvd. Work Order No: 12-03-1242 <br /> Petaluma, CA 94954-2312 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> Project: ExxonMobil99CAS/022789C <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-12-884-821 Aqueous GC/MS L 03/22/12 03122112 120322L01 <br /> Parameter SPIKE ADDED LCS%REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> Benzene 10.00 100 98 80-120 73-127 2 0-20 <br /> Toluene 10.00 99 98 80-120 73-127 1 0-20 <br /> Ethylbenzene 10.00 100 100 80-120 73-127 1 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 10.00 104 101 69-123 60-132 3 0-20 <br /> Tert-Butyl Alcohol(TBA) 50.00 104 102 63-123 53-133 2 0-20 <br /> Diisopropyl Ether(DIPE) 10.00 102 97 59-137 46-150 6 0-37 <br /> Ethyl-t-Butyl Ether(ETBE) 10.00 104 97 69-123 60-132 7 0-20 <br /> Tert-Amyl-Methyl Ether(TAME) 10.00 101 97 70-120 62-128 4 0-20 <br /> Ethanol 100.0 92 102 28-160 6-182 11 0-57 <br /> 1,2-Dibromoethane 10.00 98 98 79-121 72-128 0 0-20 <br /> 1,2-Dichloroethane 10.00 101 98 80-120 73-127 3 0-20 <br /> Total number of LCS compounds: 11 <br /> Total number of ME compounds: 0 <br /> Total number of ME compounds allowed: 1 <br /> LCS ME CL validation result: Pass <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> h" <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 - FAX: (714)894-7501 <br />