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Page 24 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 GCIMS UU 12109/10 12109110 1012091-01 <br /> Parameter LCS %REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> Benzene 99 101 78-120 71-127 2 0-20 <br /> Bromobenzene 104 100 80-120 73-127 3 0-20 <br /> Bromochloromethane 97 99 80-120 73-127 2 0-20 <br /> Bromodichloromethane 98 101 80-120 73-127 3 0-20 <br /> Bromoform 104 106 80-120 73-127 3 0-20 <br /> Bromomethane 85 84 80-120 73-127 2 0-20 <br /> n-Butylbenzene 99 102 77-123 69-131 3 0-25 <br /> sec-Butylbenzene 101 105 80-120 73-127 3 0-20 <br /> tert-Butylbenzene 105 107 80-120 73-127 1 0-20 <br /> Carbon Disulfide 90 91 80-120 73-127 1 0-20 <br /> Carbon Tetrachloride 100 99 49-139 34-154 1 0-20 <br /> Chlorobenzene 97 98 79-120 72-127 1 0-20 <br /> Chloroethane 106 108 80-120 73-127 2 0-20 <br /> Chloroform 97 96 80-120 73-127 1 0-20 <br /> Chloromethane 102 104 80-120 73-127 1 0-20 <br /> 2-Chlorotoluene 101 97 80-120 73-127 4 0-20 <br /> 4-Chlorotoluene 102 103 80-120 73-127 1 0-20 <br /> Dibromochloromethane 101 102 80-120 73-127 1 0-20 <br /> 1,2-Dibromo-3-Chloropropane 110 114 80-120 73-127 3 0-20 <br /> 1,2-Dibromoethane 102 102 80-120 73-127 0 0-20 <br /> Dibromomethane 100 100 80-120 73-127 0 0-20 <br /> 1,2-Dichlorobenzene 97 99 75-120 68-128 2 0-20 <br /> 1,3-Dichlorobenzene 99 101 80-120 73-127 2 0-20 <br /> 1,4-Dichlorobenzene 96 98 80-120 73-127 2 0-20 <br /> Dichlorodifluoromethane 122 122 80-120 73-127 0 0-20 <br /> 1,1-Dichloroethane 97 97 80-120 73-127 1 0-20 <br /> 1,2-Dichloroethane 96 97 80-120 73-127 2 0-20 <br /> 1,1-Dichloroethene 96 95 74-122 66-130 1 0-20 <br /> c-1,2-Dichloroethene 101 99 80-120 73-127 1 0-20 <br /> t-1,2-Dichloroethene 99 98 80-120 73-127 1 0-20 <br /> 1,2-Dichloropropane 99 99 79-115 73-121 0 0-25 <br /> 1,3-Dichloropropane 100 99 80-120 73-127 1 0-20 <br /> 2,2-Dichloropropane 97 96 80-120 73-127 1 0-20 <br /> 1,1-Dichloropropene 98 99 80-120 73-127 1 0-20 <br /> c-1,3-Dichloropropene 109 111 80-120 73-127 2 0-20 <br /> t-1,3-Dichloropropene 112 110 80-120 73-127 1 0-20 <br /> Ethylbenzene 102 101 76-120 69-127 2 0-20 <br /> Isopropylbenzene 107 106 80-120 73-127 1 0-20 <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 />