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One 2-quart sample was taken to represent each natural soil horizon or contrasting layer wfthin the depth <br />to 72 inches or bedrock, whichever was shallower. <br />Samples were collected from hand-dug pits, three-inch diameter auger holes or backhoe trenches that <br />were dug at all soil sampled sttes. The sampled soil material was placed in clean, labeled, polyethylene <br />plastic or Tyvek® bags, and was kept cool and as dry as possible to limit chemical changes. The upper <br />horizons of many profiles were moist upon sampling and were air dried prior to shipment to IML in <br />Sheridan, Wyoming (1988) or Colorado State University (1996 and 1998) for analysis. Each sample was <br />split at the laboratory with one portion being used for analysis and the archival portion retained for <br />additional tests, if necessary. <br />Prime Farmland Determination <br />The Montrose County NRCS district office in Norwood, Colorado, was contacted for determination of prime <br />farmland status for the study area. In addition, onsite evaluations were made to determine whether prime <br />farmland existed. <br />Evaluation of Soils for Reclamation Potential <br />The sails and parent materials on the study area were rated for suitability based on criteria presented in <br />Table 2.04.9-2, Criteria for Evaluating Soil Suitability. These suitability criteria were approved by CDMG <br />inthescope-of-work. Recommended topsoilsalvagedepthsweregeneratedforeachsampledpedonand <br />each component of a mapping unit. Salvage depths were determined following a detailed evaluation of <br />pH, electrical conductivity, saturation percent, soil texture, Sodium Adsorption Ratio, calcium carbonate <br />percent, and coarse fragment percent. <br />Topsoil salvage depths were based on average depthsto the suspect parameter or average profile depths <br />(if the entire profile was suitable) across the study area based on numerous soil profile descriptions <br />obtained for each soil type. <br />• (REVISED 2/00) 2.04.9-8 <br />