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• <br />2.0 Potential for Adverse Impacts <br />HRMMR § 6.4.20(1) provides for evaluation of potential adverse impacts associated <br />with designated chemicals, toxic- or acid-forming materials, or acid rock drainage at <br />mine facilities. This section identifies facilities present at the Van 4 Mine in relation to <br />the requirements of HRMMR § 6.4.20(1), and presents general discussion regarding <br />the potential for these facilities to contain designated chemicals, toxic- or acid-forming <br />materials, or acid rock drainage. <br />2.1 Description of Specified Mine Facilities <br />HRMMR § 6.4.20(1)(c) sets forth various types of mine facilities that require specific <br />evaluation for the presence of designated chemicals and acid- or toxic-forming <br />materials. Exhibit 2-1 describes the types of Specified Facilities that are present at the <br />Van 4 Mine in relation to HRMMR § 6.4.20(1)(c): <br />Exhibit 2-1. Summarv of the Status of Specified Facilities at the Van 4 Mine <br />r1 <br />U <br />Specified Facilities Facility Status <br />Leach facilities, or heap leach pad Not Present <br />Tailings storage or disposal areas Not Present <br />Impoundments Not Present <br />Waste rock piles (development rock stockpiles) Present <br />Stock piles, temporary or permanent Not Present <br />Land application sites Not Present <br />The Van4 Mine is not currently active (e.g., generating ore) and therefore, only waste <br />rock piles (development rock stockpiles) are present, as shown in Figure 2-1. <br />Development rock is material that must be excavated to facilitate mine development, <br />but that does not contain adequate metals content to constitute ore. Exhibit 2-2 <br />summarizes characteristics of the only Specified Facility present at the Van 4 Mine: <br />the development rock stockpile. This facility is a pre-existing mine facility as <br />referenced in HRMMR §6.4.20(1)(d). <br />Exhibit 2-2. Type, Status and Size of S ecific Facilities <br />Mine Facility Status Approximate <br /> Acreage <br />Van 4 Mine Development Rock Active pre-existing facility 4.7 <br /> Stockpile <br />C <br />2.2 Evaluation of Potential for Adverse Impacts at Specified <br />Facilities <br />In accordance with HRMMR § 6.4.20(1), this section provides evaluation of the <br />potential for adverse impacts related to designated chemicals, acid- or toxic forming <br />materials, or acid mine drainage at the Van 4 Mine. Denison has completed extensive <br />geochemical characterization work at the Van 4 Mine. This section provides a <br />summary of the results of this work. <br />T:\84986-Denison Mines\Task Order 4 - EPP Sunday Mines Group-Van4\Van4TINAL Report\FINAL - Environmental Protection Plan Van4.doc <br />2-1