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• <br />DUPLICATE CONTROL SAMPLE REPORT <br />Metals Analysis and Preparation <br />Analyte <br />Category: PB -FAA -AD <br />Matrix: AQUEOUS <br />QC Lot: 28 JAN 92-X <br />Concentration Units: mg/L <br />Lead <br />Category: ICP -AT <br />Matrix: AQUEOUS <br />QC Lot: 17 JAN 92-X <br />Concentration Units: mg/L <br />Enseco <br />A Coming Company <br />Concentration Accuracy Precision <br />Spiked Measured Average(Z,)(RPD) <br />DCSI DCS2 AVG DCS Limits DCS Limit <br />0.02 0.0187 0.0190 0.0188 94 75-125 1.6 20 <br />Aluminum <br />2.00 <br />2.00 <br />2.00 <br />2.00 <br />100 <br />85-115 <br />0.1 <br />10 <br />Antimony <br />0.50 <br />0.491 <br />0.491 <br />0.491 <br />98 <br />85-115 <br />0.0 <br />10 <br />Arsenic <br />0.5 <br />0.502 <br />0.489 <br />0.495 <br />99 <br />85-115 <br />2.6 <br />10 <br />Barium <br />2.0 <br />2.00 <br />1.99 <br />2.00 <br />100 <br />85-115 <br />0.4 <br />10 <br />Beryllium <br />0.050 <br />0.0481 <br />0.0479 <br />0.0480 <br />96 <br />80-115 <br />0.5 <br />10 <br />Boron <br />1.0 <br />0.918 <br />0.907 <br />0.912 <br />91 <br />85-115 <br />1.2 <br />10 <br />Cadmium <br />0.050 <br />0.0472 <br />0.0464 <br />0.0468 <br />94 <br />81-118 <br />1.7 <br />10 <br />Calcium <br />100 <br />105 <br />105 <br />105 <br />105 <br />85-115 <br />0.3 <br />10 <br />Chromium <br />0.20 <br />0.196 <br />0.195 <br />0.196 <br />98 <br />85-115 <br />0.8 <br />10 <br />Cobalt <br />0.50 <br />0.496 <br />0.499 <br />0.498 <br />100 <br />85-115 <br />0.6 <br />10 <br />Copper <br />0.25 <br />0.249 <br />0.249 <br />0.249 <br />100 <br />85-115 <br />0.2 <br />10 <br />Iron <br />1.0 <br />0.995 <br />0.990 <br />0.993 <br />99 <br />85-115 <br />0.6 <br />10 <br />Lead <br />0.50 <br />0.515 <br />0.508 <br />0.511 <br />102 <br />85-115 <br />1.3 <br />10 <br />Lithium <br />0.20 <br />0.204 <br />0.202 <br />0.203 <br />101 <br />85-115 <br />1.1 <br />10 <br />Magnesium <br />50 <br />53.1 <br />52.9 <br />53.0 <br />106 <br />85-115 <br />0.5 <br />10 <br />Manganese <br />0.50 <br />0.491 <br />0.490 <br />0.490 <br />98 <br />85-115 <br />0.3 <br />10 <br />Molybdenum <br />0.20 <br />0.200 <br />0.198 <br />0.199 <br />100 <br />85-115 <br />0.9 <br />10 <br />Nickel <br />0.50 <br />0.493 <br />0.495 <br />0.494 <br />99 <br />83-115 <br />0.4 <br />10 <br />Potassium <br />50 <br />51.4 <br />51.4 <br />51.4 <br />103 <br />83-115 <br />0.1 <br />10 <br />Selenium <br />2.0 <br />2.01 <br />2.02 <br />2.02 <br />101 <br />85-115 <br />0.6 <br />10 <br />Silver <br />0.050 <br />0.0479 <br />0.0496 <br />0.0488 <br />98 <br />56-116 <br />3.5 <br />35 <br />Sodium <br />100 <br />103 <br />103 <br />103 <br />103 <br />85-115 <br />0.5 <br />10 <br />Thallium <br />2.0 <br />2.08 <br />2.07 <br />2.07 <br />104 <br />84-118 <br />0.5 <br />10 <br />15 <br />Tin <br />4.0 <br />3.82 <br />3.86 <br />3.84 <br />96 <br />80-115 <br />1.0 <br />Titanium <br />2.0 <br />0.50 <br />1.89 <br />0.499 <br />1.88 <br />0.498 <br />1.89 <br />0.498 <br />94 <br />100 <br />85-115 <br />82-115 <br />0.3 <br />0.0 <br />10 <br />20 <br />Vanadium <br />Zinc <br />0.50 <br />0.494 <br />0.491 <br />0.493 <br />99 <br />80-115 <br />0.7 <br />20 <br />Calculations are performed before rounding to avoid round -off errors in calculated results. <br />