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Page 5 of 12 <br /> alscience <br /> _nvironmental Quality Control - Spike/Spike Duplicate <br /> rmw aboratories, Inc. nei c ' <br /> Kiff Analytical Date Received: 03/17/07 <br /> 2795 2nd Street, Suite 300 Work Order No: 07-03-1184 <br /> Davis, CA 95616-6593 Preparation: EPA 3050B <br /> Method: EPA 60108 <br /> Project Tracy Hiqh School <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument <br /> Prepared Analyzed Number <br /> 07-03.12243 Solid ICP 5300 03/19/07 03/20/07 070319511 <br /> Parameter MS%REG MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Cadmium 101 99 75.125 2 0-20 <br /> Chromium 111 112 75-125 1 0-20 <br /> Lead 4X 4X 75-125 4X 0-20 Q <br /> Nickel 106 104 75-125 2 0-20 <br /> Zinc 106 109 75-125 2 0-20 <br /> RPDRelative Percent Difference. CL-Control Limit <br /> ����J v v. V-'`/ " <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714)895-5494 FAX: (714)894-7501 <br />