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• surface stoniness <br />The sampling site location and number were plotted on the field map as accurately as possible. <br />One 2 -quart sample was taken to represent each natural soil horizon or contrasting layer within the <br />depth to 72 inches or bedrock, whichever was shallower. <br />Samples were collected from hand -dug pits, three -inch diameter auger holes or backhoe trenches <br />that were dug at all soil sampled sites. The sampled soil material was placed in clean, labeled, <br />polyethylene plastic or Tyvek® bags, and was kept cool and as dry as possible to limit chemical <br />changes. The upper horizons of many profiles were moist upon sampling and were air dried prior <br />to shipment to IML in Sheridan, Wyoming (1988) or Colorado State University (1996 and 1998) for <br />analysis. Each sample was split at the laboratory with one portion being used for analysis and the <br />archival portion retained for additional tests, if necessary. The analysis of the samples is shown in <br />Attachment 2.04.9 -8. <br />11. Evaluation of Soils for Reclamation Potential <br />The soils and parent materials on the study area were rated for quality based on criteria presented <br />in Table 2.04.9 -2, Criteria for Evaluating Soil Quality. These criteria were approved by DRMS in <br />the Permit Amendment for the expansion west of 2700 Road. Recommended topsoil salvage <br />depths were generated for each sampled pedon and each component of a mapping unit. Salvage <br />depths were determined following a detailed evaluation of pH, electrical conductivity, saturation <br />percent, soil texture, Sodium Adsorption Ratio, calcium carbonate percent, and coarse fragment <br />percent. <br />The recommended topsoil salvage depth for each map unit is based on average of all depth <br />samples taken for the map unit. <br />August 2013 (PR 08) 2.04.9 -10 <br />