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These are taken from 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 uniform <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 Seneca 2I 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 Recalmation. <br />The fourth table is a Summary of guidelines from several services <br />prepared for a study by the Western Regional Technical Work- <br />Planning Conference of the Cooperative Soil Survey held at San <br />Diego, California, February 13-17, 1978, <br />The fifth table is a proposed unified set of guidelines • <br />developed at this conference but not yet officially adopted by <br />the several agencies. <br /> <br />-114- <br />