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Detailed Analytical Report Analytica Environmental Laboratories, Inc. <br />Workorder (SDG): B1009086 <br />Project: M-1977-300 <br />Client: Colorado Division of Reclamation, Mining & Safety <br />Client Project Number: None <br />Tests Run at: Analytica Environmental Laboratories - Thornton, Colorado <br />Workorder (SDG): B1009086 <br />Project: M-1977-300 <br />Project Number: QUALITY CONTROL REPORT <br />Prep Batch: T100915013 <br />MS REPORT <br />Analysis: Inorganic Anions by Ion Chromatography - Anions by IC Parent: B1009086-OIC <br />Prep Date: 9/15/2010 <br />Samp. Anal. Date: 9/15/2010 8:59:14PM Units: mg/L <br />MS Anal. Date: 9/15/2010 9:31:51PM Matrix: Drinking Water <br />Analyte Name SampResult MSRes. SPLev Recov. Recov Lim Flag <br />Nitrate as N 0.660 3.43 2.50 110.8 70 - 130 <br />Sulfate 558 776 188 116.3 70- 130 <br />Total Nitrate & Nitrite as N ND 5.93 5.00 118.6 70 - 130 <br />Prep Batch: T100921012 <br />LCS REPORT <br />Analysis: SM4500-CNE - Cyanide, Colorimetric Method - Total CN MB: T100921012-MB <br />Prep Date: 9/21/2010 <br />MB Anal. Date: 9/21/2010 4:00:OOPM Units: mg/L <br />LCS Anal. Date: 9/21/2010 4:00:OOPM Matrix: Aqueous <br />Analyte Name SampResult LCSRes. SPLev Recov. Recov Lim RPDLim Flag <br />Cyanide ND 0.0414 0.0400 103.5 83 - 107 <br />FOOTNOTES TO QC REPORT <br />Note 1: Results are shown to three significant figures to avoid rounding errors in calculations. <br />Note 2: If the sample concentration is greater than 4 times the spike level, a recovery is not meaningful, and the result <br />should be used as a replicate. In such cases the spike is not as high as expected random measurement variability of the <br />sample result itself. <br />Note 3: For sample duplicates, if the result is less than the PQL, the duplicate RPD is not applicable. If the sample and duplicate results are not <br />five times the PQL or greater, then the RPD is not expected to fall within the window shown and the comparison should be made on the basis of <br />the absolute difference. Analytica uses the criterion that the absolute difference should be less than the PQL for water or less than 2XPQL for <br />other matrices. <br />Note 4: For serial dilutions, if the result is less than the PQL, the duplicate RPD is not applicable. If the sample result is not 50 times the MDL <br />or greater, then the fact that the RPD does not meet the 10% criterion has little signifcance. Otherwise it indicates that a matrix bias may <br />exist at the analytical step. <br />Page 19 of 25