2014-01-24_REPORT - C1981028 (2)

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Client: Coors Energy Company Project/Site: Keenesburg Mine, CO Job ID: 280 - 26708 -1 Laboratory: TestAmerica Denver Narrative Case Narrative TestAmerica Job ID: 280 - 26708 -1 F47 CASE NARRATIVE Client: Coors Energy Company Project: Keenesburg Mine, CO Report Number: 280 - 26708 -1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In some cases, due to interference or analytes present at high concentrations, samples were diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. Calculations are performed before rounding to avoid round -off errors in calculated results. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the individual sections below. RECEIPT The samples were received on 03/16/2012; the samples arrived in good condition, properly preserved, and on ice. The temperature of the coolers at receipt was 1.9 °C. A sample ID discrepancy was noted between the information listed on the Chain of Custody and the sample container labels for all samples. The container labels listed the sample ID's ending with a B, which was not reflected on the Chain of Custody. The samples were logged without the B per the Chain of Custody. DISSOLVED METALS (ICP) Samples FPW (280- 26708 -1), DH -96 (280- 26708 -2), DH -122 (280- 26708 -3), AMW -1 (280- 26708 -4), AMW -2 (280- 26708 -5), and SMW -2 (280- 26708 -6) were analyzed for dissolved metals (ICP) in accordance with EPA Method 200.7. The samples were prepared on 03/20/2012 and analyzed on 03/22/2012. No difficulties were encountered during the metals analyses. All quality control parameters were within the acceptance limits. SODIUM ABSORPTION RATIO Samples FPW (280- 26708 -1), DH -96 (280- 26708 -2), DH -122 (280- 26708 -3), AMW -1 (280- 26708 -4), AMW -2 (280- 26708 -5), and SMW -2 (280- 26708 -6) were analyzed for Sodium Absorption Ratio in accordance with USDA Handbook 60 - 20B. The samples were analyzed on 03/23/2012. No difficulties were encountered during the SAR analyses. All quality control parameters were within the acceptance limits. ALKALINITY Samples FPW (280- 26708 -1), DH -96 (280- 26708 -2), DH -122 (280- 26708 -3), AMW -1 (280- 26708 -4), AMW -2 (280- 26708 -5), and SMW -2 (280- 26708 -6) were analyzed for Alkalinity in accordance with SM20 2320B. The samples were analyzed on 03/22/2012. No difficulties were encountered during the alkalinity analyses. All quality control parameters were within the acceptance limits. TestAmerica Denver Page 4 of 31 3/27/2012