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CHEMWEST ANALYTICAL LABORATORIES <br /> TOTAL CHROMIUM <br /> Date(s) Analyzed: 07/18/90 Case 6332 <br /> thru: 07/20/90 Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 64629 6332-1 0. 05 <br /> 64630 6332-2 0. 07 <br /> 64631 6332-3 690 <br /> 64632 6332-4 700 <br /> 64633 6332-5 1900 <br /> 64634 6332-6 980 <br /> 64635 6332-7 38 <br /> 64636 6332-8 0.04 <br /> 64637 6332-9 0. 02 <br /> 64638 6332-10 0. 06 <br /> 64639 6332-11 BRL <br /> 64640 6332-12 BRL <br /> 64634-D 6332-6DUP 970 <br /> 64634-MS 6332-6MS 1080 <br /> 64634-MSD 6332-6MSD 1090 <br /> ------------------------------------------------------------------ <br /> Spike Amount <br /> Client CHEMWEST Conc. % Detected <br /> ID ID (mg/L) Rec. (mg/L) <br /> ------------------------------------------------------------------ <br /> Method Blank 6332-MB BRL <br /> MBS 6332-MBS 1. 0 107% <br /> MBSD 6332-MBSD 1. 0 109% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 2% <br /> Spike <br /> Client CHEMWEST Conc. % <br /> ID ID (mg/L) Rec. <br /> ------------------------------------------------------------------ <br /> 64634-MS 6332-6MS 100 101% <br /> 64634-MSD 6332-6MSD 100 115% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 13% <br /> The reporting limit for Total Chromium is 0. 02 mg/L. <br /> BRL: Below Reporting Limit. <br /> Approved by: _ REV3:1.90 <br /> COMPUCHEM WESTERN DMSION <br />