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Page 23 of 31 <br /> a/science <br /> =nvironmental Quality Control - LCS/LCS Duplicate <br /> aboratories, Inc. <br /> STANTEC Date Received: N/A <br /> 3017 Kilgore Road, Suite 100 Work Order No: 10-12-0722 <br /> Rancho Cordova, CA 95670-6141 Preparation: EPA 5030C <br /> Method: EPA 82608 <br /> Project: ARCO Service Station No. 6080 <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-12-709-449 Solid GC/MS Z 12/09/10 12/09/10 101209L01 <br /> Parameter LCS %REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> p-Isopropyltoluene 93 91 80-120 73-127 3 0-20 <br /> Methylene Chloride 92 92 80-120 73-127 1 0-20 <br /> Naphthalene 83 83 80-120 73-127 0 0-20 <br /> n-Propylbenzene 95 94 80-120 73-127 1 0-20 <br /> Styrene 93 92 80-120 73-127 1 0-20 <br /> Ethanol 96 90 56-140 42-154 7 0-20 <br /> 1,1,1,2-Tetrachloroethane 92 92 80-120 73-127 1 0-20 <br /> 1,1,2,2-Tetrachloroethane 94 92 80-120 73-127 2 0-20 <br /> Tetrachloroethene 104 107 80-120 73-127 3 0-20 <br /> Toluene 89 88 77-120 70-127 1 0-20 <br /> 1,2,3-Trichlorobenzene 87 85 80-120 73-127 3 0-20 <br /> 1,2,4-Trichlorobenzene 88 84 80-120 73-127 5 0-20 <br /> 1,1,1-Trichloroethane 91 92 80-120 73-127 1 0-20 <br /> 1,1,2-Trichloroethane 94 94 80-120 73-127 0 0-20 <br /> Trichloroethene 94 93 80-120 73-127 1 0-20 <br /> Trichlorofluoromethane 106 105 80-120 73-127 1 0-20 <br /> 1,2,3-Trichloropropane 93 94 80-120 73-127 2 0-20 <br /> 1,2,4-Trimethylbenzene 92 90 80-120 73-127 2 0-20 <br /> 1,3,5-Trimethylbenzene 93 93 80-120 73-127 1 0-20 <br /> Vinyl Acetate 87 87 80-120 73-127 0 0-20 <br /> Vinyl Chloride 94 94 68-122 59-131 0 0-20 <br /> Xylenes(total) 92 91 80-120 73-127 1 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 90 91 77-120 70-127 1 0-20 <br /> Tert-Butyl Alcohol(TBA) 91 88 68-122 59-131 3 0-20 <br /> Diisopropyl Ether(DIPE) 91 91 78-120 71-127 0 0-20 <br /> Ethyl-t-Butyl Ether(ETBE) 93 92 78-120 71-127 1 0-20 <br /> Tert-Amyl-Methyl Ether(TAME) 92 93 75-120 68-128 1 0-20 <br /> Total number of LCS compounds: 65 <br /> Total number of ME compounds : 1 <br /> Total number of ME compounds allowed: 3 <br /> LCS ME CL validation result: Pass <br /> RPD-Relative Percent Difference. CL-Control Limit <br /> W4� <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL.(714) 895-5494 . FAX. (714) 894-7501 <br />