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54 <br />• <br />• <br />3. INTERPRETATIONS GUIDES 70 TOPSOIL QUALITY CHARACT'II2IZATION <br />These are taken fmn several sources. Because natural and <br />disturbed soil and overburden characteristics vary widely from <br />place to place and because the several agencies have varying <br />experiences, conceptions and purposes, the guides are not unifoim <br />in selection and evaluation of criteria for topsoil quality. <br />The first three guide sheets included here were consulted <br />in arriving at the classification of the Nucla Mine Lease soils <br />surveyed in this study. They are, respectively, Table 1 = <br />Wyoming Department of Environmental Quality; Table 2 = USDA Soil <br />Conservation Service; and Table 3 = USDI Bureau of Reclamation. <br />The 4th table is a summary of guidelines fran several <br />services prepared for a study by the Western Regional Technical <br />Nk~rk-f~lanning Conference of the Cooporative Soil Survey held <br />at San Dim, California, February 13-17, 1978, <br />The 5th table is a proposed unified set of guidelines <br />developed at this co:,ft;r~nce but not yet officially adopted by <br />the several agencies. <br />• <br />