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Page 9 of 26 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Parsons Date Received: 10/23/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-10-2038 <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 /> 08-10-1832-31 Solid ICP 5300 10/23/08 10/24/08 081023S03 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 72 65 50-115 10 0-20 <br /> Arsenic 105 107 75-125 1 0-20 <br /> Barium 128 122 75-125 1 0-20 3 <br /> Beryllium 109 105 75-125 3 0-20 <br /> Cadmium 109 104 75-125 4 0-20 <br /> Chromium 103 100 75-125 2 0-20 <br /> Cobalt 110 105 75-125 3 0-20 <br /> Copper 110 107 75-125 2 0-20 <br /> Lead 103 100 75-125 2 0-20 <br /> Molybdenum 102 100 75-125 2 0-20 <br /> Nickel 107 106 75-125 0 0-20 <br /> Selenium 104 103 75-125 1 0-20 <br /> Silver 105 99 75-125 5 0-20 <br /> Thallium 92 87 75-125 6 0-20 <br /> Vanadium 101 98 75-125 1 0-20 <br /> Zinc 127 141 75-125 6 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 />