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Stuicrr - 2.04.6 Elk Creek Facilities azea were sampled and analysed. Analysis results, which are included in Exhibit • 2.04 - E5, Soils Inforrnation, indicate no significant suitability problerru. East Yard Area - Similar to the Ells Creek Facilities area, the East Yard Area was prevtously disturbed by surface support activities for the Somerset Mme. Portions of the East Yard area were ako previously disturbed by highway and railroad constmction activities. Sutficial 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 ako increased. Sanborn 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/colluvial materiak 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 analysed. Analysis resulu, which are included in Exhibit 2.04 - E5, Soils Infom~ation, indicate no significant suitabilityproblems. Elk Creek Portal Area -Much of the Ells Geek Portal azea was previously disturbed by a natural landshde and ass«iated slump and erosion features. Surficial materials in this area consist of a mixture of soil, alluvial/colluvial materials, and landslide debris up to 35 feet thick over shallow unconsolidated alluvia]/colluvial valley bosom materials and sandstone or shale bedrock Beaz Creek Portal Area -The Beaz Creek Portal area is reclaimed with surficial materials cortsuting of regraded spoil over shallow unconsolidated native alluvra]/colluvial valley bottom materials and sandstone and shale bedr«k Upper Hubbard Creek Facilities Area -The Upper Hubbard Creek Facilities area is reclaimed with • surficial matetiak consisting of regraded spoil over shallow unconsohdated native alluvial/colluvial valley bottom materials and sandstone and shale bednxk Lower Hubbard Creek Portal Area -The Lower Hubbard Creek Ponal 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 pr«essing for OMI's existing and proposed operations u limited to crushing and sizing, with no flotation or other processing to remove impurities from the nrrt-of-mine coal. Since no coal pr«essing waste will be generated by the mining and related operations, coal refuse will be limited to r«k, burned coal, carbonaceous shale, and un-marketable low-grade coal materials generated by mine development activities; r«k, 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 tmderground workings or in designed and permitted coal refuse surface disposal st«kpiles. Roof and Floor Materials -Sampling - In order to verify that placement of coal raining wastes either underground or in surface st«kpiles will not adversely impact surface or ground water quality, coal seam and roof and floor materials have been sampled and analysed. The following identifies and briefly discusses the ge«hemical samples collected and analysed to evaluate mine waste suitability and acid- ortoxic-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 ge«hemical analyses of roof and floor samples from the B coal seam in the Somerset Mtne and coal refuse samples from the existing Ells 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 analysed from the Elk Creek Refuse Pile. PR04 2.04-12 Revised August 2000