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CHEMWEST ANALYTICAL LABORATORIES <br /> NITRATE-N <br /> Date (s) Analyzed : 04/17/91 Case 7937 <br /> thru: 04/18/91 Matrix : Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 66217 7937-1 38 <br /> 66218 7937-2 2. 2 <br /> 66219 7937-3 4. 7 <br /> 66220 7937-4 24 <br /> 66221 7937-5 23 <br /> 66222 7937-6 9. 8 <br /> 66223 7937-7 19 <br /> 66224 7937-8 17 <br /> 66225 7937-9 38 <br /> 66226 7937-10 3. 4 <br /> 66227 7937-11 4. 1 <br /> 66228 7937-12 3. 6 <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. 25 1208 <br /> MBSD MBSD 0. 25 116% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 38 <br /> The reporting limit for Nitrate-N is 0. 10 mg/L. <br /> BRL: Below Reporting Limit. <br /> Date Reported: <br /> Approved by: 04/24/91 REV3 : 1. 90 <br /> t <br /> COMPUCHEM WESTERN DNISION <br />