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'Am AIII l-nvirunmentul Network <br /> PAGE 8 OF 9 <br /> QUALITY CONTROL DATA <br /> MATRIX: WATER AEN JOB NOS: 9307249, <br /> 9307250 <br /> CLIENT PROJ. ID: 2963.00-01 <br /> MATRIX SPIKE RECOVERY SUMMARY <br /> QC CONTROL LIMITS <br /> OBSERVED RECOVERIES <br /> INST./ SAMPLE SAMPLE SPIKE (mg/L) % REC. RPD <br /> COMPOUND METHOD SPIKED RESULT ADDED MS MSD % REC. RPD LIMIT LIMIT <br /> Ca, Calcium ICP/6010 9307204-03A 10.6 50.0 61.1 60.7 101 1 75-125 20 <br /> Cr, Chromium ICP/6010 9307204-03A ND 0.20 0.197 0.197 99 <1 77-115 5 <br /> Cu, Copper ICP/6010 9307204-03A 0.796 0.25 1.029 1.017 91 1 85-113 5 <br /> Fe, Iron ICP/6010 9307204-03A 0.221 10.0 10.34 10.28 101 1 75-125 20 <br /> Hexavalent <br /> Chromium NOVASPEC/7196 9307249-04A ND 0.2 0.188 0.188 94 <1 71-123 7 <br /> Mg, Magnesium ICP/6010 9307204-03A 1.33 50.0 51.5 51.2 100 1 75-125 20 <br /> Mn, Manganese ICP/6010 9307204-03A 0.007 0.5 0.522 0.520 103 <1 75-125 20 <br /> Na, Sodium ICP/6010 9307204-03A 3.69 50.0 52.8 52.3 98 1 75-125 20 <br /> Zn, Zinc ICP/6010 9307204-03A 0.127 0.50 0.613 0.603 96 2 77-116 5 <br /> Chloride DIONEX/300 9307250-02A 84.21 50.0 142 145 119 2 75-135 5 <br /> Sulfate DIONEX/300 9307250-02A 146 100 251 257 108 3 75-125 5 <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RSP = Relative Percent Difference <br /> ND = Not Detected <br /> < = Less Than <br />