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Quality Control Results <br /> Job Number: 720-14844-1 <br /> Client: Earth Tech, Inc. <br /> LCS-Standard Reference Material -Batch: 720-37214 Method: 60108Preparation: 3050B <br /> ' <br /> Lab Sample ID: LCSSRM 720-37214/25-A Analysis Batch: 720-37263 Instrument ID: Varian ICP <br /> Lab File ID: N/A <br /> Client Matrix: Solid Prep Batch: 720-37214 <br /> Units: mg/Kg Initial Weight/Volume: 1.00 g <br /> Dilution: 1.0 Final Weight/Volume: 50 mL <br /> Date Analyzed: 06/25/2008 0504 <br /> Date Prepared: 06/24/2008 1121 <br /> Spike Amount Result %Rec. Limit Qual <br /> Analyte <br /> ' — 7.4 12.1 44 11 -101 <br /> Antimony 2 <br /> 222.7.7 <br /> 21.5 95 69-119 <br /> ' Arsenic 145 132 91 61 -117 <br /> 1.0 <br /> Barium .09 0.965 89 56- 102 <br /> Beryllium 42.2 40.4 96 67-118 <br /> Cadmium 246 <br /> 246 236 96 67- 121 <br /> ' Chromium 65.1 76.8 118 64- 133 <br /> Cobalt 66.2 113 68- 126 <br /> Copper 58.5 40.4 92 62-113 <br /> Lead 44.1 <br /> 61.0 56.8 93 62- 128 <br /> ' Molybdenum 96 90.5 93 65-117 <br /> 5 <br /> Nickel 159 96 63- 126 <br /> 795.5 <br /> Selenium 73.2 92 51 -130 <br /> Silver 79 5.9 55.4 99 64- 124 <br /> Thallium 5 55 1 97 67-123 <br /> Vanadium 566.7.7 89 62-110 <br /> Zinc 44.0 39.0 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> ' TestAmerica San Francisco Page 24 of 30 <br />