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<br />from the sediment pond. <br />IV <br />V <br />VI <br />To soil <br />Baseline soil information is presented on pages 2.04.9 (1-5) of Volume I and <br />Exhibits (G) and (H) of Volume III. Information regarding topsoil removal and <br />storage is provided on Sections 2.05.3(5) and 2.05.4 of the permit application <br />Volume I. The two major types of soil at the Rimrock mine are the Ayon and <br />Capulin Groups. The A and B horizon soil types from each soil group were <br />sampled and analyzed by the Colorado State University soil testing laboratory <br />for pH, texture, Iron, Copper, Calcium, Magnesium, Sodium, Zinc, Phosphorus <br />and sodium adsorption ration (SAR). The A horizon averaged 6 1/4" in depth in <br />four test locations. Since 15" of topsoil is required for reclamation, the Division <br />allowed the operator to salvage all of the A and B horizons of the Capulin soil <br />and the A horizon of the Ayon soil. In addition, soil in ephemeral drainage <br />bottoms which averages up to 60" deep was approved to be salvaged. The <br />addition of the drainage bottom soil, which is considered to be suitable topsoil, <br />was sufficient to satisfy the 15" topsoil cover required for the reclamation. This <br />translates into approximately 10,775 cubic yards of Ayon soil and 32,260 cubic <br />yards of Capulin soil plus streambed soil. Since the operator stripped only 1 1/2 <br />acres at a time and hauled it directly to backfilled areas, only one topsoil <br />stockpile was constructed, located northeast of the pit area (Exhibit KK). Due to <br />the fact that mining did not progress into or east of Engleville Gulch, the quantity <br />of topsoil salvaged was less than anticipated. All topsoil salvaged was, <br />however, replaced on the backfilled and regraded areas. The Division <br />conducted an inspection on November 12, 1994 and verified topsoil replacement <br />depths. Topsoil replacement depth averaged 12 inches on the reclaimed <br />eastern pit area. <br />Sealing of Drilled Holes and Underground Openings <br />Monitoring well 29-4 was sealed in June 1995. Sealing and abandonment <br />reports were filed with the Division in July 1995. Sealing was conducted in <br />accordance with Rule 4.07.3. <br />Exploration drill hole 29-8 was improperly plugged at the completion of notice of <br />intent X-87-202-00. The operator has committed to proper sealing of this hole. <br />The operator had projected to uncover drill hole 29-8 during Phase II of the <br />operation. Although the operation did not progress into Phase II operations, <br />proper sealing of drill hole 29-8, to comply with Rule 4.07.3, is still a requirement <br />of this permit. <br />Use of Explosives <br />The surface blasting operation can be found in Section 2.05.3(6) and 4.08 of the <br />is <br />