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Page 12 of 29 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Parsons Date Received: 10/21/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-10-1812 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 30508 <br /> Method: EPA 60108 <br /> Proiect Tracv SPCC/444692 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> SPCC-B-1-4 Solid ICP 5300 10/21/08 10/21/08 081021S02 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 25 27 50-115 8 0-20 3 <br /> Arsenic 92 98 75-125 4 0-20 <br /> Barium 4X 4X 75-125 4X 0-20 Q <br /> Beryllium 96 100 75-125 5 0-20 <br /> Cadmium 96 101 75-125 5 0-20 <br /> Chromium 94 106 75-125 5 0-20 <br /> Cobalt 94 102 75-125 5 0-20 <br /> Copper 105 121 75-125 6 0-20 <br /> Lead 94 101 75-125 5 0-20 <br /> Molybdenum 74 73 75-125 1 0-20 3 <br /> Nickel 86 103 75-125 6 0-20 <br /> Selenium 85 90 75-125 6 0-20 <br /> Silver 95 100 75-125 5 0-20 <br /> Thallium 85 94 75-125 9 0-20 <br /> Vanadium 95 105 75-125 4 0-20 <br /> Zinc 38 48 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 />