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Quality Control Results <br /> Client: Chemical Data Management Job Number: 720-25330-1 <br /> Lab Control Sample/ Method: 6010B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-64503 Preparation: 3010A <br /> LCS Lab Sample ID: LCS 720-64503/2-A Analysis Batch: 720-64622 Instrument ID: Thermo 6500 ICP <br /> Client Matrix: Water Prep Batch: 720-64503 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial WeighWolume: 40 mL <br /> Date Analyzed: 01/20/2010 2127 Final WeighWolume: 40 mL <br /> Date Prepared: 01119/2010 1405 <br /> LCSD Lab Sample ID: LCSD 720-6450313-A Analysis Batch: 720-64622 Instrument ID: Thermo 6500 ICP <br /> Client Matrix: Water Prep Batch: 720-64503 Lab File ID: N/A <br /> Dilution: 1.0 Units: mg/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 01/20/2010 2132 Final WeighWolume: 40 mL <br /> Date Prepared: 01/19/2010 1405 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Antimony 98 98 _ 80-120 1 20 <br /> Arsenic 98 97 80-120 0 20 <br /> Barium 101 102 80-120 0 20 <br /> Beryllium 102 101 80-120 1 20 <br /> Cadmium 100 100 80-120 1 20 <br /> Chromium 104 104 80-120 1 20 <br /> Cobalt 102 101 80-120 1 20 <br /> Copper 102 102 80-120 0 20 <br /> Lead 101 100 80-120 1 20 <br /> Molybdenum 104 103 80-120 1 20 <br /> Nickel 102 101 80-120 1 20 <br /> Selenium 93 93 80-120 0 20 <br /> Silver 98 99 80-120 1 20 <br /> Thallium 100 99 80-120 1 20 <br /> Vanadium 103 103 80-120 0 20 <br /> Zinc 99 98 80-120 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 12 of 16 <br />