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August 4, 2009 <br />D2B <br />D2B2 <br />Date <br />pH <br />TSS <br />pH <br />TSS <br />December 27, 2012 <br />9.19 <br />85 mg /1 <br />NA <br />NA <br />October 5, 2011 <br />8.5 <br />22 mg /1 <br />N/A <br />N/A <br />November 18, 2010 <br />9.11 <br />23 mg /1 <br />N/A <br />N/A <br />October 15, 2009 <br />8.44 <br />17 mg /1 <br />Not available <br />Not available <br />December 31, 2008 <br />8.69 <br />38 mg /1 <br />Not available <br />Not available <br />December 31, 2007 <br />8.72 <br />17 mg /1 <br />8.49 <br />14 mg /1 <br />June 13, 2006 <br />8.58 <br />12 mg /1 <br />8.15 <br />39 mg /1 <br />June 6, 2005 <br />8.57 <br />10 mg /1 <br />NA <br />NA <br />December 28, 2004 <br />8.53 <br />6 mg /1 <br />NA <br />NA <br />August 4, 2009 <br />6060 <br />Borehole is sealed <br />October 26, 2009 <br />6059 <br />Borehole is sealed <br />June 15, 2010 <br />6057.8 <br />Borehole is sealed <br />August 6, 2010 <br />6056.8 <br />Borehole is sealed <br />June 30, 2011 <br />6057 <br />Borehole is sealed <br />October 7, 2011 <br />6057 <br />Borehole is sealed <br />June 19, 2012 <br />6055 <br />Borehole is sealed <br />November 21, 2012 <br />6057 <br />Borehole is sealed <br />The data suggests that changes to B seam water level have occurred likely not only from mine <br />water transfers but natural sources as well. See also the discussion regarding the H -10 well <br />where that monitor well indicates a variable water level in the old Somerset Mine B seam <br />workings. <br />Initially, once a year, samples of water are taken of water transferred to D2B and D2B2 and <br />summarized below. The access to the pumps leading to D2B2 is permanently sealed with the <br />sealing of the West District. No issues have been encountered with respect to the analytical <br />results. <br />SC -1 Well — Rollins Sandstone <br />Monitor well SC -1 is located just east of the reclaimed Sanborn Creek mine portal area. <br />Well SC -1 was completed in the Rollins Sandstone, which is located 40 to 50 feet below the B- <br />Seam. Monitoring data were historically collected from well SC -1 prior to any substantial <br />mining in the B -Seam of the Sanborn Creek Mine. The SC -1 well is located up- gradient relative <br />to the Rollins Sandstone unit which is located stratigraphically under the footprint of the mining <br />activities. <br />Water in the Rollins Sandstone is confined to limited localized zones that are fractured and /or <br />contained above the Rollins, as evidenced by water level measurements that are well above the <br />top of the sandstone member. Water quality is poor, with high total dissolved solids as sodium <br />chloride. Inflow and recovery of the water level in the drill holes indicates very low <br />permeability and porosity of the sandstone. There has been some variability in the water levels <br />15 <br />