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Page 12 of 22 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Kiff Analytical Date Received: 01/17/09 <br /> 2795 2nd Street, Suite 300 Work Order No: 09-01-1418 <br /> Davis, CA 95616-6593 Preparation: EPA 30508 <br /> Method: EPA 60109 <br /> Proiect Stockton Promenade <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 09-01-1489-7 Solid ICP 5300 01/21/09 01/22/09 090121S05 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Cadmium 101 101 75-125 0 0-20 <br /> Chromium 98 97 75-125 1 0-20 <br /> Lead 100 101 75-125 0 0-20 <br /> Nickel 104 98 75-125 3 0-20 <br /> Zinc 140 106 75-125 9 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 />