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Page 19 of 29 <br /> alscience <br /> =nvironmental Quality Control - LCS/LCS Duplicate <br /> Aw aboratories, Inc. <br /> Parsons Date Received: N/A <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-10-1812 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Project: Tracy SPCC/444692 <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 097-01-002-11,643 Solid ICP 5300 10/21/08 10/21/08 0810211-02 <br /> Parameter LCS%REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> Antimony 95 109 80-120 73-127 14 0-20 <br /> Arsenic 89 95 80-120 73-127 7 0-20 <br /> Barium 107 107 80-120 73-127 0 0-20 <br /> Beryllium 101 99 80-120 73-127 2 0-20 <br /> Cadmium 104 108 80-120 73-127 4 0-20 <br /> Chromium 100 105 80-120 73-127 6 0-20 <br /> Cobalt 105 110 80-120 73-127 5 0-20 <br /> Copper 101 111 80-120 73-127 9 0-20 <br /> Lead 108 106 80-120 73-127 2 0-20 <br /> Molybdenum 101 104 80-120 73-127 3 0-20 <br /> Nickel 106 107 80-120 73-127 1 0-20 <br /> Selenium 96 89 80-120 73-127 8 0-20 <br /> Silver 100 103 80-120 73-127 2 0-20 <br /> Thallium 94 101 80-120 73-127 7 0-20 <br /> Vanadium 100 103 80-120 73-127 3 0-20 <br /> Zinc 109 106 80-120 73-127 3 0-20 <br /> Total number of LCS compounds: 16 <br /> Total number of ME compounds : 0 <br /> Total number of ME compounds allowed: 1 <br /> LCS ME CL validation result: Pass <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 />