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• sampled soil material was placed in clean, labeled, polyethylene plastic <br />bags, and was kept cool and as dry as possible to limit chemical <br />changes. <br />EVALUATION OF SOILS FOR RECLAMATION POTENTIAL <br />The soils and parent materials in the Nucla Mine Scraper Pit study area <br />were rated for suitability based on criteria given in Table 9-4-2. <br />Recommended topsoil salvage depths were generated for each map unit <br />identified during the baseline survey. These topsoil salvage depths <br />were based on average depths to the suspect parameter or average profile <br />depths (if the entire profile was suitable) across the entire study area <br />based on numerous soil sampling holes dug in each soil type. The <br />topsoil evaluations relied on the field descriptions of each soil map <br />unit as well as extensive laboratory data generated by the study. <br />RESULTS <br />• Soil Survey Maps <br />Thirteen soil map units were identified, mapped, sampled, and described <br />for the Nucla Mine Scraper Pit study area. The areal extent of each <br />type (in acres) is provided in Table 9-4-3. The distribution of each <br />type on the study area is provided on a rectified 1" = 400' scale air <br />photo base map (Exhibit 4-4, Soil Types and Topsoil Salvage Depths). <br />Typifying soil profile and soil sampling locations as well as <br />strategically placed observation sites are depicted on Exhibit 9-5, Soil <br />Sample Locations. A complete legend, which identifies all mapping unit <br />symbols and recommended soil salvage depths, is also provided on Exhibit <br />9-4. <br />Map Unit Descriptions <br />Mapping units are listed by map symbol, name, and sample number in Table <br />9-4-4. Detailed descriptions of each mapping unit are included with the <br />Topsoil Suitability section of this attachment. Field pedon description <br />forms are contained in Appendix 9-4-1. Strategical observation site <br />• <br />9-4-13 Revised 11/0?/86 <br />