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— • Page 6 of 17 <br /> alscience <br /> Z 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 3050B <br /> Method: EPA 6010B <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 /> 09-09-2172-1 Solid ICP 5300 09/30/09 09/30/09 090930 04 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 18 20 50-115 15 0-20 3 <br /> Arsenic 110 115 75-125 3 0-20 <br /> Barium 4X 4X 75-125 4X 0-20 Q <br /> Beryllium 107 108 75-125 1 0-20 <br /> Cadmium 97 98 75-125 1 0-20 <br /> Chromium 103 101 75-125 2 0-20 <br /> Cobalt 106 107 75-125 0 0-20 <br /> Copper 115 107 75-125 4 0-20 <br /> Lead 104 106 75-125 2 0-20 <br /> Molybdenum 100 101 75-125 1 0-20 <br /> Nickel 105 103 75-125 1 0-20 <br /> Selenium 87 90 75-125 4 0-20 <br /> Silver 122 120 75-125 2 0-20 <br /> Thallium 87 90 75-125 3 0-20 <br /> Vanadium 113 106 75-125 3 0-20 <br /> Zinc 58 46 75-125 3 0-20 3 <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 />