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Exhibit D: Attachment I:CI UNITED STATES DEPARTMENT dF AGRICULTURE SOtL CONSERVATION SERVICE, 248 Dozier Avenue, Caron City, CO 81212 ,lanuazy 9, 198;. N;r. Ben Thorson 3257 Fremont Cotu~ty Rd. 67 Canon City, CO 81212 Dear Ns•. Thorson, • This is regarding the on-site investigation of soils I conducted on a gypsuir~ - mine site on January 8, 1981. The purpose of this Snvestigation is to desc:cibe the soil layers of the overburden 1n the permit area and to rate the suitability of each layer as soil reconstruction material for reclamation. The mine is located in the SE, of Section 7 and the SW-,',- of Section 8, T.18 S., H.69W, Fremont County, Colorado. The site is not presently excavated. The boundaries of the area to be excavated were shown to me Sn the field by Ben Thorson, Jr.UnSt G on the soils map (Attachment C) is Gypsum land and has no soil overburden. Two representative soil profiles in the upper part of the overburden in units C were sampled and described. The area delineated as iJnit K on attachment C will not be excavated but was described, sampled, and evalu- ated as a possible nearby source of reclamation material. Attachment A :shows the soil properties of the txo representative profiles des- cribed. The rating of each soil horizon as reconstruction material Ss Sncluded, Sodium absorption ratio, soil salinity and levels of toxic materials are riot tested by this office, Bulk samples of each layer rated are in ovr office. These samples are available In this office for you to pick up, You will need 1 • these samples for required soil analyses. Attachment B is photocopies of the criteria of the Soil Conservation Service • used to evaluate soil as reclamation reconstruction material. Layers 1-A and 1-C rate fair as to soil reaction and available water capa- city, These layers probably have fair-tc-poor suitability in this semi-ax id climate without irrigation because of the combined effects of the moderate limitations related to the soil reaction and available water capacity togeth- er xith the 30 to 40 percent content of cobbles and gravel. Each indiviilual property rates fair, however. I have rated layer 2-A poor because the stone content is borderline to the poor rating in the criteria. This combined with the fairly low available water cap- acity indicates the layer is poor overall. I have rated the 2-C layer poor also because of the combined effect of low available water capacity per inch, high pN, and large combined content of gravel, cobble and stones. Each indi- vidual property rates fair. p (~\j