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�Ense o <br />. COPNwO C ­ <br />DUPLICATE CONTROL SAMPLE REPORT <br />Wet Chemistry Analysis and Preparation <br />Analyte <br />Category: S-A <br />Matrix: AQUEOUS <br />QC Lot: 23 OCT 89-A <br />Concentration Units: mg/L <br />Sulfide, Total <br />Category: TOC -A <br />Matrix: AQUEOUS <br />QC Lot: 31 OCT 89-B <br />Concentration Units: mg/L <br />Total Organic Carbon <br />Category: IC -A <br />Matrix: AQUEOUS <br />QC Lot: 21 OCT 89-B <br />Concentration Units: mg/L <br />Fluoride <br />Chloride <br />Nitrite as N <br />Bromide <br />Nitrate as N <br />Sulfate <br />Orthophosphate as P <br />Category: CR6-A <br />Matrix: AQUEOUS <br />QC Lot: 20 OCT 89-A <br />Concentration Units: mg/L <br />Chromium VI <br />Concentration Accuracy Precision <br />Spiked Measured Average(%) (RPD) <br />DCS1 DCS2 AVG DCS Limits DCS Limit <br />0.20 0.183 0.186 0.184 92 68-127 1.6 12 <br />10.0 9.57 9.52 9.54 95 85-111 0.5 18 <br />2.0 <br />NA <br />NA <br />NC <br />NC <br />84-105 <br />NC <br />3.0 <br />2.65 <br />2.65 <br />2.65 <br />88 <br />83-116 <br />0.0 <br />2.0 <br />NA <br />NA <br />NC <br />NC <br />85-115 <br />NC <br />2.0 <br />NA <br />NA <br />NC <br />NC <br />85-115 <br />NC <br />2.0 <br />2.21 <br />2.15 <br />2.18 <br />109 <br />85-115 <br />2.8 <br />8.0 <br />7.69 <br />8.14 <br />7.92 <br />99 <br />85-115 <br />5.7 <br />10.0 <br />NA <br />NA <br />NC <br />NC <br />85-115 <br />NC <br />19 <br />15 <br />10 <br />12 <br />12 <br />13 <br />0.1 0.100 0.101 0.100 101 87-117 1.0 10 <br />NO = Not detected. <br />NC = Not calculated, calculation not applicable. <br />NA = Not applicable. <br />Calculations are performed before rounding to avoid round -off errors in calculated results <br />