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Page 13 of 23 <br /> alscience <br /> �_nvironmental Quality Control - Laboratory Control Sample <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 /> Quality Control Sample ID Matrix Instrument Date Analyzed Lab File ID LCS Batch Number <br /> 097-01-002-11,648 Solid ICP 5300 10/22/08 081022-1-01 081022L01 <br /> Parameter Conc Added Conc Recovered LCS%Rec %Rec CL ME CL Qualifiers <br /> Antimony 25.0 26.3 105 80-120 73-127 <br /> Arsenic 25.0 23.3 93 80-120 73-127 <br /> Barium 25.0 25.7 103 80-120 73-127 <br /> Beryllium 25.0 23.7 95 80-120 73-127 <br /> Cadmium 25.0 25.8 103 80-120 73-127 <br /> Chromium 25.0 25.0 100 80-120 73-127 <br /> Cobalt 25.0 26.6 106 80-120 73-127 <br /> Copper 25.0 26.0 104 80-120 73-127 <br /> Lead 25.0 25.2 101 80-120 73-127 <br /> Molybdenum 25.0 25.4 102 80-120 73-127 <br /> Nickel 25.0 26.5 106 80-120 73-127 <br /> Selenium 25.0 22.0 88 80-120 73-127 <br /> Silver 12.5 12.3 98 80-120 73-127 <br /> Thallium 25.0 24.7 99 80-120 73-127 <br /> Vanadium 25.0 24.7 99 80-120 73-127 <br /> Zinc 25.0 25.1 101 80-120 73-127 <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 />