2009-02-10_PERMIT FILE - C1981022 (5)

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Sea,kn - 2.04.6 Elk Creek Facilities area were sampled and analyzed. Analysis results, which are included in Exhibit • 2.04 - E5, Soils Information, indicate no significant suitability problems. East Yard Area - Similar to the Ells Creek Facilities area, the East Yard Area was previously disturbed by surface support activities for the Somerset Mme. Portions of the East Yard area were also previously disturbed by highway and railroad construction activities. Surficial materials in this area are similar to those described for the Elk Creek Facilities area except that the thickness of the disturbed surface interval increases up to 30 feet and the coal refuse content is also increased. Sanbom Creek Portal Area - Portions of the Sanborn Creek Portal area were previously disturbed by historic residential development and railroad construction activities. Surficial materials in this area consist of a mixture of disturbed soils and alluvial/coUuvial materials up to 10 feet thick over relatively thick unconsolidated alluvial/colluvial materials. Both disturbed and undisturbed surficial materials in the Sanborn Creek Portal area were sampled and analyzed. Analysis results, which are included in Exhibit 2.04 - E5, Soils Information, indicate no significant suitability problems. Elk Creek Portal Area - Much of the Elk Creek Portal area was previously disturbed by a natural landslide and associated slump and erosion features. Surficial materials in this area consist of a mixture of soil, alluviaVcoEuvial materials, and landslide debris up to 35 feet thick over shallow unconsolidated alluvial/colluvial valley bottom materials and sandstone or shale bedrock Bear Creek Portal Area - The Bear Creek Portal area is reclaimed with surficial materials consisting of regraded spoil over shallow unconsolidated native alluvial/coUuvial valley bottom materials and sandstone and shale bedrock Upper Hubbard Creek Facilities Area - The Upper Hubbard Creek Facilities area is reclaimed with • surficial materials consisting of regraded spoil over shallow unconsolidated native alluvial/coUuvial valley bottom materials and sandstone and shale bedrock Lower Hubbard Creek Portal Area - The Lower Hubbard Creek Portal area is reclaimed with surficial materials consisting of regraded spoil over shallow unconsolidated native alluvial/ colluvial valley bottom materials and sandstone and shale bedrock Coal Refuse - Coal processing for OMI's existing and proposed operations is limited to crushing and sizing, with no flotation or other processing to remove impurities from the tun-of-mine coal. Since no coal processing waste will be generated by the mining and related operations, coal refuse will be limited to rock, burned coal, carbonaceous shale, and un-marketable low-grade coal materials generated by mine development activities; rock, shale, or low-grade top or bottom coal or partings which may be taken during mining to maintain minimum entry heights; or roof-fall materials. Coal refuse will be placed in either mined-out underground workings or in designed and permitted coal refuse surface disposal stockpiles. Roof and Floor Materials - Sampling - In order to verify that placement of coal mining wastes either underground or in surface stockpiles will not adversely impact surface or ground water quality, coal seam and roof and floor materials have been sampled and analyzed. The following identifies and briefly discusses the geochemical samples collected and analyzed to evaluate mine waste suitability and acid- or toxic-producing potential: U.S. Steel Mining Company B Seam and Refuse Pile Sampling/Analysis - In August 1980, U.S. Steel Muting Company collected and completed geochemical analyses of roof and floor samples from the B coal seam in the Somerset Mine and coal refuse samples from the existing Elk Creek Refuse Pile. • Three roof and one floor sample were collected and analyzed including roof samples from the 3 Dip - 9 west and 4 Dip entries and roof and floor samples from the 4 Dip - 3 East entry. Three refuse samples were collected and analyzed from the Elk Creek Refuse Pile. PR04 2.04-12 Revised August 2000