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CHEMWEST ANALYTICAL LABORATORIES <br /> HEXAVALENT CHROMIUM <br /> Date (s) Analyzed : 04/09/91 Case 7937 <br /> Matrix : Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 66217 7937-1 BRL <br /> 66218 7937-2 630 <br /> 66219 7937-3 920 <br /> 66220 7937-4 2300 <br /> 66221 7937-5 1600 <br /> 66222 7937-6 1100 <br /> 66223 7937-7 BRL <br /> 66224 7937-8 BRL <br /> 66225 7937-9 BRL <br /> 66226 7937-10 BRL <br /> 66227 7937-11 BRL <br /> 66228 7937-12 BRL <br /> ------------------------------------------------------------------ <br /> Spike Amount <br /> Client CHEMWEST Conc . 8 Detected <br /> ID ID (mg/L) Rec. (mg/L) <br /> ------------------------------------------------------------------ <br /> Method Blank MB BRL <br /> MBS MBS 0. 2 1018 <br /> MBSD MBSD 0. 2 978 <br /> ------------------------------------------------------------------ <br /> Relative 8 Difference = 48 <br /> The reporting limit for Hexavalent Chromium is 0. 05 mg/L. <br /> BRL: Below Reporting Limit . <br /> / Date Reported : <br /> Approved by: V`��� 04/24/91 REV3:1. 90 <br /> I <br /> COMPUCHEM WESTERN DMSION <br />