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Timing for the placement of seed will be directly following placement of the soil cover <br />material, prior to the cover material forming a hard crust. Preferably this will be in either <br />the spring or fall, but experience indicates that getting the seed on the soil cover material <br />soon after placement of the soil cover material is more important than the time of year the <br />seed is placed to the success of the seeding effort. A copy of the current DOE seed mix is <br />attached in this Exhibit. <br />Vent holes and access roads <br />Assuming that DOE desires to have the vent holes plugged permanently, all surface <br />structures will be removed at the vent holes. The cement pad will be broken up and <br />placed into the shaft. The shaft then will be plugged using either polyurethane foam with <br />a thickness of 10 feet, or concrete with a thickness of 3 feet, placed far enough down the <br />hole that a minimum of several feet of mine waste and one foot of soil cover can be <br />placed on top of this plug. This cover material will be slightly mounded so that, after <br />natural compaction, no depression will remain to collect any surface water. This area <br />will then be scarified and seeded. <br />The access roads will be scarified and seeded if DOE does not want the roads left open <br />for future access. <br />URANIUM LEASING SITES <br />Reseeding Specifications <br />The following seed mixture was developed, in consultation with U.S. Bureau of Land <br />Management, and is generally approved for use within the Slick Rock, Naturita, Uravan, <br />and Gateway, Colorado, areas. Seed selection criteria were based on climate and <br />elevation ranges within these areas. Recognizing that surface soil conditions, nutrients, <br />and available moisture can vary within these areas, successful establishment of six or <br />more of the twelve species is considered adequate. If the total number of species seeded <br />is less than that specified below, the seeding rates for the individual species must be <br />adjusted accordingly. All seed tags must be submitted to DOE for verification prior to <br />the seeding application. <br />D -2 <br />