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CHEMWEST ANALYTICAL LABORATORIES <br /> TOTAL CHROMIUM <br /> Date (s) Analyzed : 04/16/91 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 7937-3 930 <br /> 66220 7937-4 2000 <br /> 66221 7937-5 1500 <br /> 66222 7937-6 1000 <br /> 66223 7937-7 0. 08 <br /> 66224 7937-8 0. 02 <br /> 66225 7937-9 BRL <br /> 66226 7937-10 0.16 <br /> 66227 7937-11 BRL <br /> 66228 7937-12 BRL <br /> 66218 DUP 7937-2 DUP 630 <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. 1 958 <br /> MBSD MBSD 0.1 95% <br /> ------------------------------------------------------------------ <br /> Relative 8 Difference = 08 <br /> Spike <br /> Client CHEMWEST Conc . % <br /> ID ID (mg/L) Rec. <br /> ------------------------------------------------------------------ <br /> 66218 MS 7937-2MS 10 1018 <br /> 66218 MSD 7937-2MSD 10 878 <br /> ------------------------------------------------------------------ <br /> Relative 8 Difference = 158 <br /> The reporting limit for Total Chromium is 0. 02 mg/L. <br /> BRL: Below Reporting Limit . <br /> Date Reported : <br /> Approved by: 04/24/91 REV3 : 1. 90 <br /> I <br /> COMPUCHEM WESTERN DIVISION <br />