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CHEMWEST ANALYTICAL LABORATORIES <br /> HEXAVALENT CHROMIUM <br /> Date Analyzed: 07/25/91 Case 8477 <br /> thru: 07/26/91 Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 67837 8477-1 BRI, <br /> 67838 8477-2 0. 063 <br /> 67839 8477-3 595 <br /> 67840 8477-4 1440 <br /> 67841 8477-5 715 <br /> 67842 8477-6 1540 <br /> 67843 8477-7 850 <br /> 67844 8477-8 BRL <br /> 67845 8477-9 BRL <br /> 67846 8477-10 BRL <br /> 67847 8477-11 BRI, <br /> 67848 8477-12 BRI, <br /> ------------------------------------------------------------------ <br /> Spike Amount <br /> Client CHEMWEST Conc. % Detected <br /> ID ID (mg/L) Rec. (mg/L) <br /> ------------------------------------------------------------------ <br /> Method Blank 8477-MB BRL <br /> MBS 8477-MBS 0.20 97% <br /> MBSD 8477-MBSD 0.20 98% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 1% <br /> The reporting limit for Hexavalent Chromium is 0. 050 mg/L. <br /> BRL: Below Reporting Limit. <br /> 7 Date Reported: <br /> Approved by: 1 09/04/91 REV3 : 1.90 <br /> COMPUCHEM WESTERN DMSION <br />