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following procedures outlined in Standard Method for the Examination of Water <br />• and Wastewater. Additional surface water resource information has been prepared <br /> by Denver consulting firms of Ertec, Fox Consultants, and EnecoTech Inc., where <br />all studies were under the direction of Mr. George M. L. Robinson. Detailed <br />discussions are presented in Section 2.04.7. <br />Soils <br />The original soil mapping was conducted by Robert Reeder of Romenco for the <br />1976 permit; and in 1978, Ecology Consultants Inc. performed additional studies. <br />In 1979, Camp, Dresser and McKee collected five soil samples and analyzed <br />material for pH, electrical conductivity saturation, particle size distribution <br />soluble calcium, magnesium and sodium, sodium adsorption ratio, and organic <br />matter. In addition, EnecoTech Inc. in 1983 collected additional samples from <br />the backfilled mine area and collected samples from the area adjacent to the <br />• lower Yampa sedimentation pond. All mapping activities were conducted using <br />Soil Conservation Service methodology. See Section 2.04.9 for detailed <br />discussion. <br />Vegetation <br />Original vegetative mapping was done by Robert Reeder of Romenco in 1976, <br />Ecology Consultants Inc. in 1978, Ertec in 1981, and EnecoTech Inc. in 1983 and <br />1984. The Romenco report produced maps using SCS range site data, Ecology <br />Consultants conducted on-site surveying and interpretations of aerial imagery, <br />and Ertec identified an acceptable reference area that approximates the post- <br />mining vegetative community. EnecoTech Inc. finalized the revegetation moni- <br />toring program in 1983 and conducted a revegetation monitoring program in 1984. <br />Detailed discussions are presented in Sections 2.05.4, 2.05.6, and 2.04.10. <br />• <br />- 2 - (Rev. 5/86) <br />