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Page 25 of 31 <br /> alscience <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 /> 099-12-709-448 Solid GC/MS UU 12109/10 12/09/10 101209L01 <br /> Parameter LCS%REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> p-Isopropyltoluene 101 103 80-120 73-127 2 0-20 <br /> Methylene Chloride 95 95 80-120 73-127 0 0-20 <br /> Naphthalene 101 103 80-120 73-127 2 0-20 <br /> n-Propylbenzene 104 102 80-120 73-127 3 0-20 <br /> Styrene 105 105 80-120 73-127 0 0-20 <br /> Ethanol 103 109 56-140 42-154 6 0-20 <br /> 1,1,1,2-Tetrachloroethane 103 100 80-120 73-127 3 0-20 <br /> 1,1,2,2-Tetrachloroethane 106 107 80-120 73-127 1 0-20 <br /> Tetrachloroethene 96 97 80-120 73-127 1 0-20 <br /> Toluene 99 96 77-120 70-127 3 0-20 <br /> 1,2,3-Trichlorobenzene 99 98 80-120 73-127 1 0-20 <br /> 1,2,4-T rich lorobenzene 96 99 80-120 73-127 3 0-20 <br /> 1,1,1-Trichloroethane 98 97 80-120 73-127 0 0-20 <br /> 1,1,2-Trichloroethane 101 100 80-120 73-127 1 0-20 <br /> Trichloroethene 98 99 80-120 73-127 2 0-20 <br /> Trichlorofluoromethane 105 103 80-120 73-127 2 0-20 <br /> 1,2,3-Trichloropropane 100 98 80-120 73-127 1 0-20 <br /> 1,2,4-Trimethylbenzene 101 103 80-120 73-127 2 0-20 <br /> 1,3,5-Trimethylbenzene 104 102 80-120 73-127 3 0-20 <br /> Vinyl Acetate 95 95 80-120 73-127 0 0-20 <br /> Vinyl Chloride 106 106 68-122 59-131 0 0-20 <br /> Xylenes(total) 102 101 80-120 73-127 2 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 98 98 77-120 70-127 0 0-20 <br /> Tert-Butyl Alcohol(TBA) 100 99 68-122 59-131 1 0-20 <br /> Diisopropyl Ether(DIPE) 97 97 78-120 71-127 0 0-20 <br /> Ethyl-t-Butyl Ether(ETBE) 95 97 78-120 71-127 2 0-20 <br /> Tert-Amyl-Methyl Ether(TAME) 98 98 75-120 68-128 0 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 /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />