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Page 12 of 20 <br />alscience <br />Environmental Quality Control - Spike/Spike Duplicate <br />aboratories, Inc. <br />Cardno ERI Date Received: 09/28/11 <br />601 North McDowell Blvd. Work Order No: 11-09-1798 <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 />11-09-1725-7 Solid GC/MS XX 09/27/11 09/29/11 110928502 <br />Parameter <br />SPIKE ADDED <br />MS %REC <br />MSD %REC <br />%REC CL <br />RPD <br />RPD CL Qualifiers <br />Benzene <br />0.05000 <br />94 <br />96 <br />61-127 <br />2 <br />0-20 <br />Toluene <br />0.05000 <br />91 <br />93 <br />63-123 <br />2 <br />0-20 <br />Ethylbenzene <br />0.05000 <br />94 <br />96 <br />57-129 <br />2 <br />0-22 <br />Methyl -t -Butyl Ether (MTBE) <br />0.05000 <br />89 <br />90 <br />57-123 <br />2 <br />0-21 <br />Tert-Butyl Alcohol (TBA) <br />0.2500 <br />90 <br />93 <br />30-168 <br />3 <br />0-34 <br />Diisopropyl Ether (DIPE) <br />0.05000 <br />89 <br />91 <br />57-129 <br />2 <br />0-20 <br />Ethyl -t -Butyl Ether (ETRE) <br />0.05000 <br />90 <br />93 <br />55-127 <br />3 <br />0-20 <br />Tert-Amyl-Methyl Ether (TAME) <br />0.05000 <br />94 <br />96 <br />58-124 <br />2 <br />0-20 <br />Ethanol <br />0.5000 <br />117 <br />111 <br />17-167 <br />5 <br />0-47 <br />1,1-Dichloroethene <br />0.05000 <br />101 <br />103 <br />47-143 <br />2 <br />0-25 <br />1,2-Dibromoethane <br />0.05000 <br />97 <br />98 <br />64-124 <br />2 <br />0-20 <br />1,2 -Dichlorobenzene <br />0.05000 <br />84 <br />86 <br />35-131 <br />1 <br />0-25 <br />1,2-Dichloroethane <br />0.05000 <br />107 <br />108 <br />80-120 <br />1 <br />0-20 <br />Carbon Tetrachloride <br />0.05000 <br />80 <br />88 <br />51-135 <br />10 <br />0-29 <br />Chlorobenzene <br />0.05000 <br />92 <br />93 <br />57-123 <br />2 <br />0-20 <br />Trichloroethene <br />0,05000 <br />98 <br />100 <br />44-158 <br />2 <br />0-20 <br />Vinyl Chloride <br />0.05000 <br />97 <br />98 <br />49-139 <br />1 <br />0-47 <br />RPD - Relaii�e Percent Difference . C� - C,antrpl l.imii <br />7440 Lincoln Way, Garden Grove, CA 92841-1427. TEL:(714) 895-5494 FAX: (714) 894-7501 <br />