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I Enseco CORNING C11-1 DUPLICATE CONTROL SAMPLE REPORT �'EP :fig 1g3 Metals Analysis and Preparation C��1�r'ROPvi��EPvTiiL HEALTH Concentration PERPOff%SERVICES Accuracy Precision Analyte Spiked Measured Average(%) (RPD) DCS1 DCS2 AVG DCS Limits DCS Limit Category: ICP-A Matrix: AQUEOUS QC Lot: 08 SEP 89-A Concentration Units: mg/L Aluminum 2.00 1 .98 2.00 1 .99 100 85-115 1 .0 10 Antimony 0.50 0.539 0.536 0.538 108 85-115 0.6 10 Arsenic 2.0 1 .81 1 .91 1 .86 93 85-115 5.4 10 Barium 2.0 2.01 2.06 2.04 102 85-115 2.5 10 Beryllium 0.050 0.0510 0.0530 0.0520 104 80-115 3.8 10 Boron 1 .0 0.980 1 .03 1 .00 101 85-115 5.0 10 Cadmium 0.050 0.0490 0.0490 0.0490 98 80-117 0.0 10 Calcium 100 97.0 99.2 98. 1 98 85-115 2.2 10 Chromium 0.20 0. 190 0. 194 0. 192 96 85-115 2. 1 10 Cobalt 0.50 0.500 0.507 0.504 101 85-115 1 .4 10 Copper 0.25 0.282 0.290 0.286 114 85-115 2.8 10 Iron 1 .0 0.956 0.978 0.967 97 85-115 2.3 10 Lead 0.50 0.453 0.444 0.448 90 85-115 2.0 10 Lithium 0.20 0.209 0.216 0.212 106 85-115 3.3 10 Magnesium 50 47.9 48.9 48.4 97 85-115 2. 1 10 Manganese 0.50 0.490 0.503 0.496 99 85-115 2.6 10 Molybdenum 0.20 0.201 0.201 0.201 101 85-115 0.0 10 Nickel 0.50 0.482 0.489 0.486 97 83-115 1 .4 10 Potassium 50 49.4 50.3 49.8 100 83-115 1 .8 10 Selenium 2.0 2. 12 2. 16 2. 14 107 85-115 1 .9 10 Silver 0.050 0.0480 0.0500 0.0490 98 56-116 4. 1 35 Sodium 100 99.7 102 101 101 85-115 2.3 10 Thallium 2.0 2.08 2. 16 2. 12 106 84-118 3.8 10 Tin 0.40 0. 192 0.247 0.220 55# 80-115 25* 15 Titanium 0.20 0.201 0.208 0.204 102 85-115 3.4 10 Vanadium 0.50 0.484 0.492 0.488 98 82-115 1 .6 20 Zinc 0.50 0.480 0.487 0.484 97 80-115 1 .4 20 Category: PB-FAA-A Matrix: AQUEOUS QC Lot: 08 SEP 89-A Concentration Units: mg/L Lead 0.020 0.0196 0.0195 0.0196 98 82-115 0. 5 11 # = Recovery outside QC Limits * = RPD outside QC Limits Calculations are performed before rounding to avoid round-off errors in calculated results.