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' Quality Control Results <br /> Job Number: 720-14844-1 <br /> Client: Earth Tech, Inc. <br /> Method: 6010B <br /> Lab Control Spike/ <br /> Lab Control Spike Duplicate Recovery Report-Batch: 720-37214 Preparation: 30506 <br /> Varian ICP <br /> ID: <br /> LCS Lab Sample ID:LCS 720-37214/2-A Analysis Batch: 720-37263 Lab File Instrument nt <br /> Client Matrix: Solid Prep Batch: 720-37214 <br /> 1 0 Units: mg/Kg Initial Weight/Volume: 1 g <br /> Dilution: Final Weight/Volume: 50 mL <br /> ' Date Analyzed: 06/24/2008 1912 <br /> Date Prepared: 06/24/2008 1121 <br /> LCSD Lab Sample ID:LCSD 720-37214/3-A Analysis Batch: 720-37263 Instrument ID: Varian ICP <br /> Lab File ID: N/A <br /> Client Matrix: Solid Prep Batch: 720-37214 <br /> 1.0 Units: mg/Kg Initial Weight/Volume: 1 g <br /> Dilution: Final WeighWolume: 50 mL <br /> ' Date Analyzed: 06/24/2008 1916 <br /> Date Prepared: 06/24/2008 1121 <br /> Analyte <br /> LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 100 103 80- 120 4 20 <br /> Antimony20 <br /> Arsenic 109 110 80- 120 1 <br /> 106 106 80-120 0 20 <br /> Barium <br /> Beryllium 110 111 80-120 0 20 <br /> 108 108 80-120 0 20 <br /> Cadmium 20 <br /> Chromium 110 111 80-120 0 <br /> Cobalt 108 108 80- 120 0 20 <br /> 111 111 80- 120 1 20 <br /> Copper20 <br /> Lead 108 109 80-120 0 <br /> ' 112 112 80-120 0 20 <br /> Molybdenum <br /> Nickel 108 109 80- 120 0 20 <br /> 109 111 80-120 2 20 <br /> Selenium20 <br /> i Silver 105 105 80- 120 0 <br /> Thallium 107 107 80-120 0 20 <br /> Vanadium 111 111 80- 120 0 20 <br /> ' <br /> 107 107 80- 120 0 20 <br /> Zinc <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 25 of 30 <br />