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Enseco w <br /> A Coming Company <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Metals Analysis and Preparation <br /> Concentration Accuracy)) Precision <br /> Analyte Spiked DCS1 Me DC 2d AVG DCS Averagg (%ts DCSPDjmit <br /> Cateory: ICP-S <br /> Matr?x: SOIL <br /> QC Lot: 19 JUN 91-N <br /> Concentration Units: mg/kg <br /> Aluminum 200 190 189 190 95 84-115 0.5 11 <br /> Antimony 50 49.9 49.0 49.5 99 81-115 1.8 10 <br /> Arsenic 50 46.0 46.4 46.2 92 82-115 1.0 10 <br /> Barium 200 202 198 200 100 85-115 2.0 10 <br /> Beryllium 5.0 5.14 5.01 5.08 102 70-110 2.7 10 <br /> Boron 100 102 102 102 102 85-115 0.2 10 <br /> Cadmium 5.0 4.57 4.48 4.52 90 81-118 2.0 15 <br /> Calcium 10000 10200 10100 10100 101 85-115 0.7 10 <br /> Chromium 20 19.7 19.4 19.5 98 84-115 1.5 17 <br /> Cobalt 50 49.2 47.9 48.6 97 80-115 2.7 10 <br /> Copper 25 26.6 26.2 26.4 106 81-115 1.7 10 <br /> Iron 100 94.7 94.0 94.4 94 85-115 0.7 14 <br /> Lead 50 47.7 48.4 48.0 96 80-115 1.5 11 <br /> Lithium 20.0 20.4 20.2 20.3 102 85-115 0.7 10 <br /> Magnesium 5000 5220 5160 5190 104 85-115 1.0 10 <br /> Manganese 50.0 49.1 48.5 48.8 98 80-115 1.4 10 <br /> Molybdenum 20.0 19.6 19.4 19.5 97 85-115 1.2 10 <br /> Nickel 50.0 49.8 48.2 49.0 98 80-115 3.3 10 <br /> Potassium 5000 5130 5060 5090 102 82-115 1.4 10 <br /> Selenium 200.0 188 182 185 93 84-115 3.1 10 <br /> Silver 5.0 4.49 4.44 4.46 89 62-115 1 .1 10 <br /> Sodium 10000 10200 10000 10100 101 85-115 1 .5 10 <br /> Thallium 200 193 192 192 96 68-110 0.8 10 <br /> Tin 400 373 369 371 93 80-122 1.1 10' <br /> Titanium 200.0 194 191 193 96 85-115 1.4 10 <br /> Vanadium 50.0 49.3 48.7 49.0 98 85-115 1.3 10 <br /> Zinc 50 46.8 46.5 46.6 93 82-115 0.6 10 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br />