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RULE 3 PERFORMANCE BOND REQUIREMENTS <br /> <br />Rule 4 Performance Standards 4-49 Revision Date: 6/13/23 <br /> Revision No.: MR-247 <br />statistically adequate sample cannot be obtained, a “reverse-null” hypothesis test may be employed <br />as detailed in Rule 4.15.11(2)(c). If an adequate sample is obtained for a particular variable, but <br />the mean is less than 90% of the reference area mean or success criteria outline in Section 4.15.8, <br />a standard-null hypothesis t-test may be used in accordance with Rule 4.15.11(2)(b). <br /> <br />If adequacy for woody plant density cannot be achieved utilizing the formulation in Rule 4.15.11 <br />(2)(a), additional sample adequacy and success evaluation options are described under Rule <br />4.15.11(3). <br /> <br />4.16 POSTMINING LAND USE <br /> <br />4.16.1 General <br /> <br />Implementation of the detailed reclamation plan as presented in Section 2.05.5 will result in a <br />landscape and vegetative cover that is equal to or better than the premining condition for rangeland <br />use that currently exists in the area. <br /> <br />4.16.2 Determining Use of Land <br /> <br />The premining land uses for the mine plan and adjacent areas are shown on the Land Use Map <br />(Map 17). The narrative describing the land use of the permit area is presented under Section <br />2.04.3. The proposed postmining land use will involve the restoration of the premining land use <br />of rangeland, as described in Section 2.05.5. <br /> <br />4.16.3 Prior to Release of Lands from the Permit Area in Accordance with 3.03.1 (2) (c) <br /> <br />The land use of rangeland will be restored in a timely manner as outlined in Section 2.05.4. <br />Implementation of the timetables contained therein will assure a contemporaneous reclamation <br />program. No alternative land uses will be implemented in the reclamation plan set forth under <br />Section 2.05.4. <br /> <br />4.17 AIR RESOURCES PROTECTION <br /> <br />Colowyo employs fugitive dust control measures in all phases of the mining and reclamation <br />activities. The control measures currently used are set forth in detail in Section 2.05.6. <br /> <br />The operations at Colowyo are presently regulated under numerous emission permits issued by the <br />Colorado Department of Health, Air Pollution Control Division. Section 2.03.10 identifies the <br />various permits under which Colowyo currently operates. The permits are set forth in Exhibit 8, <br />Air Quality Information. <br /> <br />4.18 PROTECTION OF FISH, WILDLIFE, AND RELATED ENVIRONMENTAL <br />VALUES <br /> <br />As described in Section 2.04.11, no threatened or endangered species have been identified within <br />the active mining operation. Also, no critical habitat for any species is known to exist. Golden