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Page 13 of 17 <br />Lr alscience <br />_nvironmental Quality Control - LCS/LCS Duplicate <br />Alm aboratories, Inc. <br />Cardno ERI Date Received: N/A <br />601 North McDowell Blvd. Work Order No: 11-08-1795 <br />Petaluma, CA 94954-2312 Preparation: EPA 5030C <br />Method: EPA 8260B <br />Project: ExxonMobil99CAS/022789C <br />Total number of LCS compounds : 17 <br />Total number of ME compounds : 0 <br />Total number of ME compounds allowed <br />LCS ME CL validation result: Pass <br />RPD - Relative Parcent Difference , CL -Control Limit <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />U <br />z <br />Date <br />Date <br />LCS/LCSD Batch <br />Quality Control Sample ID <br />Matrix <br />Instrument <br />Prepared <br />Analyzed <br />Number <br />099-12-882-1,118 <br />Solid <br />GUMS V V <br />08/30/11 <br />08/30/11 <br />110830L03 <br />Parameter <br />LCS %REC <br />LCSD %REC <br />%REC CL <br />ME CL RPD <br />RPD CL Qualifiers <br />Benzene <br />100 <br />99 <br />78-120 <br />71-127 <br />1 0-20 <br />Toluene <br />101 <br />100 <br />77-120 <br />70-127 <br />1 0-20 <br />Ethylbenzene <br />103 <br />101 <br />76-120 <br />69-127 <br />2 0-20 <br />Methyl -t -Butyl Ether (MTBE) <br />97 <br />96 <br />77-120 <br />70-127 <br />0 0-20 <br />Tert-Butyl Alcohol (TBA) <br />99 <br />97 <br />68-122 <br />59-131 <br />2 0-20 <br />Diisopropyl Ether (DIPE) <br />92 <br />92 <br />78-120 <br />71-127 <br />1 0-20 <br />Ethyl -t -Butyl Ether (ETBE) <br />98 <br />98 <br />78-120 <br />71-127 <br />0 0-20 <br />Tert-Amyl-Methyl Ether (TAME) <br />100 <br />100 <br />75-120 <br />68-128 <br />0 0-20 <br />Ethanol <br />84 <br />86 <br />56-140 <br />42-154 <br />3 0-20 <br />1, 1 -Dichloroethene <br />92 <br />90 <br />74-122 <br />66-130 <br />2 0-20 <br />1,2-Dibromoethane <br />104 <br />103 <br />80-120 <br />73-127 <br />1 0-20 <br />1,2 -Dichlorobenzene <br />100 <br />99 <br />75-120 <br />68-128 <br />1 0-20 <br />1,2-Dichloroethane <br />101 <br />101 <br />80-120 <br />73-127 <br />1 0-20 <br />Carbon Tetrachloride <br />96 <br />96 <br />49-139 <br />34-154 <br />0 0-20 <br />Chlorobenzene <br />102 <br />100 <br />79-120 <br />72-127 <br />2 0-20 <br />Trichloroethene <br />100 <br />98 <br />80-120 <br />73-127 <br />1 0-20 <br />Vinyl Chloride <br />95 <br />95 <br />68-122 <br />59-131 <br />1 0-20 <br />Total number of LCS compounds : 17 <br />Total number of ME compounds : 0 <br />Total number of ME compounds allowed <br />LCS ME CL validation result: Pass <br />RPD - Relative Parcent Difference , CL -Control Limit <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />U <br />z <br />