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CHEMWEST ANALYTICAL LABORATORIES <br /> HEXAVALENT CHROMIUM <br /> Date(s) Analyzed: 11/06/91 Case 8888 <br /> thru: 11/25/91 Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> L242 8888-1 1370 <br /> L243 8888-2 1330 <br /> L247 8888-3 2500 <br /> L248 8888-4 690 <br /> L5A 8888-5 0. 39 <br /> L244 8888-6 950 <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. 30 0. 3176 105. 9% <br /> MBSD MBSD 0. 30 0. 3030 101. 0% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 4 . 7% <br /> The reporting limit for Hexavalent Chromium is 0 . 050 mg/L. <br /> BRL: Below Reporting Limit. <br /> Date Reported: <br /> Approved by: 11/27/91 REV4 : 10.91 <br /> COMPUCHEM WESTERN DMSION <br />