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CHEMWEST ANALYTICAL LABORATORIES <br /> HEXAVALENT CHROMIUM <br /> Date (s) Analyzed: 07/18/90 Case 6332 <br /> Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID. (mg/L) <br /> ------------------------------------------------------------------ <br /> 64629 6332-1 BRL <br /> 64630 6332-2 BRL <br /> 64631 6332-3 620 <br /> 64632 6332-4 680 <br /> 64633 6332-5 1900 <br /> 64634 6332-6 1000 <br /> 64635 6332-7 36 <br /> 64636 6332-8 BRL <br /> 64637 6332-9 BRL <br /> 64638 6332-10 BRL <br /> 64639 6332-11 BRL <br /> 64640 6332-12 BRL <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 0.2 101% <br /> MBSD 6332-MBSD 0.2 100% <br /> ----------------------------------------------------------- <br /> Relative % Difference = 1% <br /> The reporting limit for Hexavalent Chromium is 0. 05 mg/L. <br /> BRL: Below Reporting Limit. <br /> Approved by: ^IV REV3 : 1 . 90 <br /> COMRJCHEM WESTERN DMSION <br />