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alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Kiff Analytical Date Received: 12/16/04 <br /> 2795 2nd Street, Suite 300 Work Order No: 04-12-1003 <br /> Davis, CA 95616-6593 Preparation: EPA 3050B <br /> Method: EPA 6010E <br /> Project 7910 Lower Sacramento Rd., Stockton, CA <br /> Date Date MSIMSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> U4€C3-7-1A Solid IC0:336 12/161A4: ;:12I171i)4 441216503 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 73 72 50-115 3 0-20 <br /> Arsenic 103 106 75-125 2 0-20 <br /> Barium 100 103 75-125 1 0-20 <br /> Beryllium 104 107 75-125 2 0-20 <br /> Cadmium 106 108 75-125 2 0-20 <br /> Chromium(Total) 105 106 75-125 1 0-20 <br /> Cobalt 105 107 75-125 1 0-20 <br /> Copper 205 139 75-125 30 0-20 3,4 <br /> Lead 103 106 75-125 3 0-20 <br /> Molybdenum 99 101 75-125 2 0-20 <br /> Nickel 104 106 75-125 2 0-20 <br /> Selenium 98 100 75-125 2 0-20 <br /> Silver 107 109 75-125 2 0-20 <br /> Thallium 99 103 75-125 4 0-20 <br /> Vanadium 103 104 75-125 1 0-20 <br /> Zinc 146 121 75-125 13 0-20 3 <br /> RPD-Relative Percent Difference , CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 9284 1-1 427 TEL-.(714) 895-5494 FAX: (714) 894-7501 <br />