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Vanadium 0.1 0.40 <br />Sulfate 250 1930 <br />Radium (226+228) 5 (pCi/1) 14.1 (pCi/1) <br />Total Dissolved Solids 500 3500 <br />*Source: CWQCC, Colorado Department of Public Health and Environment, 2008 <br />These wells have been monitored quarterly and continue to be dry. They will continue to be <br />measured quarterly and if ground water is found, it will be sampled and analyzed in accordance <br />with DRMS and CDPHE regulations. The lower Morrison is comprised of interbedded shales <br />and siltstones which form an effective aquitard and prevent any potential downward migration of <br />groundwater. Below the Morrison, shale and mudstone of the Summerville Formation acts as a <br />confining unit further separating the Morrison from potential aquifers within the older Entrada <br />sandstone (locally called the Slick Rim), Navajo sandstone, Kayenta formation, and Wingate <br />sandstone. <br />(d) This mesa has historically had dry mines. The limited water which may exist in abandoned <br />mines is from open shafts, vents or drill holes which were not properly abandoned. It is <br />anticipated that any free water existing in the mines may be used to wash down faces for <br />examination, and if mines are re-opened, the water will be utilized in drilling operations within <br />the mine. As described in Exhibit D, under Exploration, exploration boreholes will be drilled <br />and if measurable groundwater is encountered, a monitoring well(s) will be constructed and the <br />groundwater analyzed and monitored as required. <br />(3) Project Water Requirements <br />The mining and exploration activities planned for the Last Chance Permit will require less than <br />100 gallons of water per day for dust control. <br />(4) Sources of Water to Meet Project Requirements <br />The water will be hauled in as needed in a 350 gallon water tank on a support vehicle. Water <br />will be purchased from the town of Naturita. <br />(5) Statement Regarding Application for NPDES Permit <br />Given the dry nature of the Davis Mesa and the minimal project water requirements, no <br />discharges of water are anticipated and safeguards will be in place to prevent any. <br />Last Chance Mine - April 2009 <br />G-2