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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 aVen�ge 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 9-4, 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 /> 9-4-13 Pevised 11/01/P6 <br />