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Page 24 of 38 <br /> alscience �o ; yo; <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> ne <br /> Parsons Date Received: 04/09/09 <br /> 2121 North California Blvd., Suite 500 Work Order No: 09-04-0752 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 30508 <br /> Method: EPA 60108 <br /> Proiect Former Tracy MGP /444534.02000 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> E3-2-5 Solid ICP 5300 04/10/09 04/10/09 090410S03 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 8 12 50-115 40 0-20 3,4 <br /> Arsenic 88 89 75-125 1 0-20 <br /> Barium 4X 4X 75-125 4X 0-20 Q <br /> Beryllium 97 94 75-125 3 0-20 <br /> Cadmium 96 95 75-125 1 0-20 <br /> Chromium 91 96 75-125 3 0-20 <br /> Cobalt 97 94 75-125 2 0-20 <br /> Copper 99 98 75-125 1 0-20 <br /> Lead 98 97 75-125 1 0-20 <br /> Molybdenum 72 76 75-125 5 0-20 3 <br /> Nickel 93 86 75-125 3 0-20 <br /> Selenium 76 80 75-125 5 0-20 <br /> Silver 96 95 75-125 1 0-20 <br /> Thallium 94 93 75-125 2 0-20 <br /> Vanadium 91 90 75-125 0 0-20 <br /> Zinc 92 87 75-125 2 0-20 <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 />