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Page 7 of 12 <br /> alscience <br /> �_nvironmental Quality Control - Laboratory Control Sample <br /> ,um aboratories, Inc. <br /> Kiff Analytical Date Received: N/A <br /> 2795 2nd Street, Suite 300 Work Order No: 05-03-1809 <br /> Davis, CA 95616-6593 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Project: 7700 Moreland Street, Stockton, CA <br /> Quality Control Sample ID Matrix Instrument Date Analyzed Lab File ID LCS Batch Number <br /> 097-01-002-6,255 Solid ICP 3300 03/29/05 050329-1-01 050329L01 <br /> Parameter Conc Added Conc Recovered LCS%Rec %Rec CL Qualifiers <br /> Antimony 50.0 49.2 98 80-120 <br /> Arsenic 50.0 50.5 101 80-120 <br /> Barium 50.0 53.0 106 80-120 <br /> Beryllium 50.0 49.4 99 80-120 <br /> Cadmium 50.0 51.5 103 80-120 <br /> Chromium(Total) 50.0 50.9 102 80-120 <br /> Cobalt 50.0 52.7 105 80-120 <br /> Copper 50.0 49.5 99 80-120 <br /> Lead 50.0 53.5 107 80-120 <br /> Molybdenum 50.0 51.9 104 80-120 <br /> Nickel 50.0 52.2 104 <br /> 80-120 <br /> Selenium 50.0 48.7 97 80-120 <br /> Silver 25.0 23.4 94 80-120 <br /> Thallium 50.0 51.6 103 80-120 <br /> Vanadium 50.0 47.9 96 80-120 <br /> Zinc 50.0 52.4 105 80-120 <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 />