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Page 9 of 26 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Parsons Date Received: 10/24/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-10-2147 <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 /> 08-10-2149-1 Solid ICP 5300 10/24/08 10/24/08 081024S03 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 13 16 50-115 17 0-20 3 <br /> Arsenic 87 85 75-125 2 0-20 <br /> Barium 4X 4X 75-125 4X 0-20 Q <br /> Beryllium 95 99 75-125 4 0-20 <br /> Cadmium 96 98 75-125 2 0-20 <br /> Chromium 82 88 75-125 2 0-20 <br /> Cobalt 98 99 75-125 0 0-20 <br /> Copper 100 106 75-125 3 0-20 <br /> Lead 96 123 75-125 16 0-20 <br /> Molybdenum 77 76 75-125 1 0-20 <br /> Nickel 102 96 75-125 3 0-20 <br /> Selenium 83 77 75-125 7 0-20 <br /> Silver 88 91 75-125 3 0-20 <br /> Thallium 38 65 75-125 51 0-20 3,4 <br /> Vanadium 93 93 75-125 0 0-20 <br /> Zinc 64 58 75-125 2 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 />