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CHEMWEST ANALYTICAL LABORATORIES <br /> TOTAL CHROMIUM <br /> Date (s) Analyzed: 10/26/90 Case 6934 <br /> Matrix: Waste Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 62751 6934-1 670 <br /> 62752 6934-2 870 <br /> 62753 6934-3 4100 <br /> 62754 6934-4 1800 <br /> 62755 6934-5 1100 <br /> 62756 6934-6 55 <br /> 62757 6934-7 BRI, <br /> 62758 6934-8 BRL <br /> 62759 6934-9 BRL <br /> 62760 6934-10 BRL <br /> 62761 6934-11 BRL <br /> 62759 DUP 6934-9D BRL <br /> 62759 MS 6934-9MS 53 <br /> 62759 MSD 6934-9MSD 54 <br /> ------------------------------------------------------------------ <br /> Spike Amount <br /> Client CHEMWEST Conc. % Detected <br /> ID ID (mg/L) Rec. (mg/L) <br /> ------------------------------------------------------------------ <br /> Method Blank MB BRL <br /> MBS MBS 0. 050 96% <br /> MBSD MBSD 0. 050 96% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 0% <br /> Spike <br /> Client CHEMWEST Conc. % <br /> ID ID (mg/L) Rec. <br /> ------------------------------------------------------------------ <br /> 62759 MS 6934-9MS 50 106% <br /> 62759 MSD 6934-9MSD 50 107% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 1% <br /> BRL: Below Reporting Limit. <br /> _/ Date Reported: <br /> Approved by: 9�, 10/31/90 REV3 : 1.90 <br /> COMPUCHEM WESTEPN DIVISION <br />