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Page 57 of 89 <br /> alscience 04X90 <br /> nvironmental Quality Control - Spike/Spike Duplicate Q° <br /> aboratories, Inc. _ ne6 <br /> Parsons Date Received- 07/11/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-07-1058 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Proiect Former Tracy MGP <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 1132-1-5 Solid ICP 5300 07/14/08 07/14/08 080714508 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 20 17 50-115 16 0-20 3 <br /> Arsenic 84 87 75-125 2 0-20 <br /> Barium 4X 4X 75-125 4X 0-20 Q <br /> Beryllium 99 95 75-125 4 0-20 <br /> Cadmium 98 94 75-125 4 0-20 <br /> Chromium 111 98 75-125 6 0-20 <br /> Cobalt 101 95 75-125 4 0-20 <br /> Copper 107 100 75-125 4 0-20 <br /> Lead 110 104 75-125 5 0-20 <br /> Molybdenum 68 67 75-125 1 0-20 3 <br /> Nickel 130 115 75-125 6 0-20 3 <br /> Selenium 82 85 75-125 4 0-20 <br /> Silver 94 90 75-125 4 0-20 <br /> Thallium 94 89 75-125 6 0-20 <br /> Vanadium 74 67 75-125 3 0-20 3 <br /> Zinc 54 37 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 />