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2. Figure 2-3 has been revised to include a corrected scale and is provided in the <br /> Figures section of this TR. Figure 2-3 was completed in AutoCAD, which has an in- <br /> built scale; accordingly, the acreages calculated from this figure for the Sunday Low- <br /> Grade Stockpile and Sunday Development Rock Stockpile are correct. <br /> 2. The following paragraphs are added to this section to clarify the status and <br /> stabilization of the Low-Grade-Ore Stockpile. "Low-grade-ore stockpiles are also <br /> considered temporary stockpiles but may be stored on site for greater than 180 <br /> days, depending on market conditions. In the event that the stockpiled material is <br /> stored in excess of 180 days, the pile will be surveyed with an XRF analyzer, or <br /> equivalent instrument, using the same procedures described previously in Section <br /> 1.2, Sunday Low-Grade Stockpile. Any material exceeding an average of 500 ppm <br /> uranium will be: <br /> a. shipped to a uranium mill in accordance with the Ore Transportation Plan <br /> presented in Attachment A and in a manner consistent with any conditional road use <br /> requirements of San Miguel County; or, <br /> b. excavated and transported to a dry location in the Sunday Mine's underground <br /> workings; or, <br /> c. covered with 12 to 18 inches of development rock that has uranium <br /> concentrations of less than 500 ppm." <br /> Section 2.2.2 Acid and Toxic Producing Materials: PRM proposes that the following <br /> paragraph be added at the end of this section. "DRMS has determined that uranium ore <br /> could potentially be toxic if stored on site for an extended period of time. In accordance <br /> with DRMS policy, low-grade material with uranium content equal to, or greater than, <br /> 500 ppm will be considered ore and be subject to the 180-day restriction for onsite <br /> storage. If low-grade stockpiles are stored in excess of 180 days, they will be surveyed <br /> for uranium content and any surficial areas exceeding 500 ppm uranium will be <br /> transported to a mill for processing, placed back in the underground workings, or <br /> stabilized in place by covering with 12 to 18 inches of development rock." <br /> Section 6.0 Evaluation of Proposed and Existing Environmental Protection <br /> Facilities: PRM proposed that the following paragraph be added at the end of this <br /> section. "Low-grade stockpiles (i.e., stockpiles containing less than 500 ppm uranium), <br /> often referred to as proto-ore stockpiles, may be established on top of development rock <br /> stockpiles. This material can be used for blending with high-grade uranium ores and, <br /> when commodity prices are high, can even be profitably milled. However, the uranium <br /> ore body is not of uniform grade and thickness, and higher-grade material can, at times, <br /> be placed in these low-grade stockpiles. Procedures for identifying and mitigating these <br /> inclusions of higher-grade material are provided in Section 6.2. <br /> 7 <br />