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CHEMWEST ANALYTICAL LABORATORIES <br /> NITRATE-N <br /> Date(s) Analyzed: 10/19/90 Case 6934 <br /> Matrix: Waste Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 62751 6934-1 3 .7 <br /> 62752 6934-2 6.2 <br /> 62753 6934-3 52 <br /> 62754 6934-4 24 <br /> 62755 6934-5 8 . 8 <br /> 62756 6934-6 19 <br /> 62757 6934-7 16 <br /> 62758 6934-8 18 <br /> 62759 6934-9 2 .7 <br /> 62760 6934-10 3 . 2 <br /> 62761 6934-11 1. 5 <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 1. 0 96% <br /> MBSD MBSD 1. 0 96% <br /> ------------------------------------------------------------------ <br /> Relative % Difference = 0% <br /> The reporting limit for Nitrate-N is 0. 1 mg/L. <br /> BRL: Below Reporting Limit. <br /> I/ Date Reported: <br /> Approved by: 'U �1 10/31/90 REV3 : 1. 90 <br /> COMPUCHEM WESTERN DIVISION <br />