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CHEMWEST ANALYTICAL LABORATORIES <br /> TOTAL COPPER <br /> Date(s) Analyzed: 11/18/91 Case 8888 <br /> thru: 11/19/91 Matrix: Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> L242 8888-1 BRL <br /> L243 8888-2 BRL <br /> L247 8888-3 0. 15 <br /> L248 8888-4 470 <br /> L5A 8888-5 BRL <br /> L244 8888-6 0. 16 <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 1. 25 1. 2170 97 . 4% <br /> MBSD MBSD 1. 25 1. 2247 98. 0% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 0. 6% <br /> The reporting limit for Total Copper is 0. 1 mg/L. <br /> BRL: Below Reporting Limit. <br /> -/ Date Reported: <br /> Approved by: 'V.7�, 11/27/91 REV4 : 10.91 <br /> COMRJCHEM WESTERN DMSION <br />