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— � Page 8 of 17 <br /> alscience • <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Shell Oil Pipeline Company LP Date Received: 09/25/09 <br /> P.O. Box 2648 Work Order No: 09-09-1933 <br /> Houston, TX 77252-2648 Preparation: EPA 1311 <br /> Method: EPA 8260B <br /> Proiect 25705 Patterson Pass Rd., Tracy, CA <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 09-09-0541-1 Solid GC/MS WW 09/22/09 09/29/09 090929501 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 121 120 72-120 0 0-20 3 <br /> Carbon Tetrachloride 157 162 63-135 3 0-20 3 <br /> Chlorobenzene 106 107 80-120 0 0-20 <br /> 1,2-Dibromoethane 106 109 80-120 3 0-20 <br /> 1,2-Dichlorobenzene 104 103 80-120 1 0-20 <br /> 1,1-Dichloroethene 125 125 60-132 0 0-24 <br /> Ethylbenzene 111 110 78-120 1 0-20 <br /> Toluene 112 93 74-122 5 0-20 <br /> Trichloroethene 125 125 69-120 0 0-20 3 <br /> Vinyl Chloride 123 126 58-130 2 0-20 <br /> Methyl-t-Butyl Ether(MTBE) 113 116 72-126 2 0-21 <br /> Tert-Butyl Alcohol(TBA) 103 99 72-126 4 0-20 <br /> Diisopropyl Ether(DIPE) 122 124 71-137 2 0-23 <br /> Ethyl-t-Butyl Ether(ETBE) 124 126 74-128 1 0-20 <br /> Tert-Amyl-Methyl Ether(TAME) 119 118 76-124 1 0-20 <br /> Ethanol 83 82 35-167 1 0-48 <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> U, A <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 • FAX: (714) 894-7501 <br />