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LrisW. <br /> eco <br /> t-� <br /> -,DUPLICATE CONTROL SAMPLE REPORT <br /> Metals Analysis and Preparation <br /> Concentration Accuracy Precision <br /> Spiked Measured Average(%) (RPD) <br /> DCS1 DCS2 AVG DCS Limits DCS Limit <br /> Analyte <br /> Category: PB-FAA-S <br /> Matrix: SOIL <br /> QC Lot: 03 SEP 91-N <br /> Concentration Units: mg/kg <br /> Lead 2.0 2.33 2.27 2.30 115 80-120 2.6 20 <br /> Category: PS-FAA-AT <br /> Matrix: AQUEOUS <br /> QC Lot: 12 SEP 91-N <br /> - Concentration Units: mg/L <br /> 0.020 0.0213 0.0214 0.0214 107 82-115 0.5 11 <br /> Lead <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br />