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CHEMWEST ANALYTICAL LABORATORIES <br /> HEXAVALENT CHROMIUM <br /> EPA METHOD 7196 <br /> Date (s) Analyzed: 01/29/92 Case: 9226 PG1 <br /> Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected RL <br /> ID ID (MG/L) (MG/L) <br /> ---------------------------------------------------------------- <br /> L5A 9226-1 BRL 0. 020 <br /> L246 9226-2 544 0. 020 <br /> L248 9226-3 635 0. 020 <br /> L242 9226-4 809 0. 020 <br /> L243 9226-5 1110 0. 020 <br /> L244 9226-6 611 0.020 <br /> L232 9226-7 BRL 0. 020 <br /> L233 9226-8 BRL 0. 020 <br /> L234 9226-9 BRL 0. 020 <br /> L239 9226-10 BRL 0. 020 <br /> L240 9226-11 BRL 0. 020 <br /> L241 9226-12 BRL 0. 020 <br /> ---------------------------------------------------------------- <br /> Spike Amount <br /> Client CHEMWEST Conc. Detected % <br /> ID ID (MG/L) (MG/L) Rec. <br /> ---------------------------------------------------------------- <br /> Method Blank MB BRL <br /> LQCS LQCS 0. 30 0. 2784 92 . 80 <br /> LQCSD LQCSD 0. 30 0. 2806 95 . 40 <br /> ---------------------------------------------------------------- <br /> Relative % Difference = 2 . 8% <br /> BRL: Below Reporting Limit. <br /> Date Reported: <br /> Approved by: 02/10/92 REV5 : 12 . 91 <br /> COMPUCHEM WESTERN DMSION <br />