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CHEMWEST ANALYTICAL LABORATORIES <br /> TOTAL CHROMIUM <br /> Date (s) Analyzed: 08/01/91 Case 8477 <br /> thru: 08/02/91 Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 67837 8477-1 BRL <br /> 67838 8477-2 0.088 <br /> 67839 8477-3 589 <br /> 67840 8477-4 1750 <br /> 67841 8477-5 712 <br /> 67842 8477-6 1470 <br /> 67843 8477-7 810 <br /> 67844 8477-8 0.024 <br /> 67845 8477-9 BRL <br /> 67846 8477-10 BRL <br /> 67847 8477-11 BRL <br /> 67848 8477-12 BRL <br /> ------------------------------------------------------------------ <br /> Spike Amount <br /> Client CHEMWEST Conc. Detected <br /> ID ID (mg/L) (mg/L) Rec. <br /> ------------------------------------------------------------------ <br /> Method Blank MB BRL <br /> MBS MBS 0.50 0.47 92 .9% <br /> MBSD MBSD 0.50 0.46 91.7% <br /> -----=------------------------------------------------------------ <br /> Relative % Difference = 1. 3% <br /> The reporting limit for Total Chromium is 0.02 mg/L. <br /> BRL: Below Reporting Limit. <br /> 1 Date Reported: <br /> Approved by• h1 08/16/91 REV3 : 1.90 <br /> 1 <br /> COMFUCHEM WES7.N DMSION <br />