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• Page 22 of 29 <br /> r a/science <br /> a=- <br /> =nvironmental Quality Control - LCS/LCS Duplicate <br /> :s aboratories, Inc. <br /> STANTEC Date Received: N/A <br /> 3017 Kilgore Road, Suite 100 Work Order No: 10-12-1102 <br /> Rancho Cordova, CA 95670-6141 Preparation: EPA 5030C <br /> Method: EPA 82606 <br /> Project: ARCO Service Station No. 6080 <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 1099-12-709452 Solid GC/MS Z 12/14110 12/14/10 1012141-01 <br /> Parameter LCS%REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> p-Isopropyltoluene 90 91 80-120 73-127 1 0-20 <br /> Methylene Chloride 82 85 80-120 73-127 4 0-20 <br /> Naphthalene 84 87 80-120 73-127 3 0-20 <br /> n-Propylbenzene 93 93 80-120 73-127 0 0-20 <br /> Styrene 91 92 80-120 73-127 1 0-20 <br /> Ethanol 72 77 56-140 42-154 7 0-20 <br /> 1,1,1,2-Tetrachloroethane 93 92 80-120 73-127 0 0-20 <br /> 1,1,2,2-Tetrachloroethane 89 92 80-120 73-127 3 0-20 <br /> Tetrachloroethene 109 114 80-120 73-127 4 0-20 <br /> Toluene 87 89 77-120 70-127 2 0-20 <br /> 1,2,3-Tri.-hlorobenzene 85 87 80-120 73-127 3 0-20 <br /> 1,2,4-Tochlorobenzene 86 87 80-120 73-127 1 0-20 <br /> 1,1,1-Trichloroethane 92 95 80-120 73-127 3 0-20 <br /> 1,1,2-Trichloroethane 90 90 80-120 73-127 0 0-20 <br /> Trichloroethene 92 95 80-120 73-127 3 0-20 <br /> Trichlorcfluoromethane 103 103 80-120 73-127 1 0-20 <br /> 1,2,3-'rrichloropropane 91 91 80-120 73-127 0 0-20 . <br /> 1,2,4-Tiimethylbenzene 91 93 80-120 73-127 1 0-20 <br /> 1,3,5-:i Jmethylbenzene 93 94 80-120 73-127 1 0-20 <br /> Vinyl Acetate 84 86 80-120 73-127 2 0-20 <br /> Vinyl Chloride 94 98 68-122 59-131 4 0-20 <br /> Xylenes(total) 91 92 80-120 73-127 1 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 91 92 77-120 70-127 1 0-20 <br /> Tert-Butyl Alcohol(TBA) 85 86 68-122 59-131 1 0-20 <br /> Diisopropyl Ether(DIPE) 87 89 78-120 71-127 3 0-20 <br /> Ethyl-t-Butyl Ether(ETBE) 92 93 78-120 71-127 1 0-20 <br /> Tert-Amyl-Methyl Ether(TAME) 91 94 75-120 68-128 4 0-20 <br /> Total number of I.CS compounds: 65 <br /> Total nurnber of ME compounds: 0 <br /> Total number of ME compounds allowed: 3 <br /> LCS ME CL validation result: Pass <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> LLk"'— <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />