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,~. any depth increment from sample point RC-2 since this entire profile consisted of soil material. Analysis for <br />selenium and boron was limited to this set of samples since previous sampling efforts conducted on <br />overburden and bench material samples had detected no problems with excess selenium or boron (IME <br />1989). Similarly, IME found no problems related to acid-base potential associated with overburden or <br />bench sample materials. Therefore, it was decided to limit the requirement of analysis for this parameter to <br />any sample exhibiting a pH below 6.5. In addition, the surface sample for each sample point would be <br />analyzed for this parameter, observing the exceptions made for soil cover as noted above. <br />As sample analyses were completed, the results were forwarded to Cedar Creek for evaluation. The <br />results of all analyses conducted on the samples collected in July are presented in Appendix 2. In the <br />absence of guidelines developed specifically for the State of Colorado, soil substitute suitability criteria <br />developed by the Wyoming Department of Environmental Quality (Land Quality Division 1989) and <br />~~, independent researchers (Schafer 1979, Sutton et al. 1981) were used to evaluate the analytical results. <br />kR~~ 2.2 Historical Samaling Programs <br />!'z D <br />(;.1 Seven sampling programs were conducted in association with this mine site between the years 1982 <br />~'~ and 1994. Materials sampled ranged from endemic soils to overburden and bench materials. <br />a <br />ti Soil 'tests' (sampling programs) I through V (1 through 5) were conducted from 1982 through 1983 <br />by the Soil Conservation Service (SCS). The objective of each of these programs (Neve 1982a, 1982b, <br />1982c, 1983) was to locate and assess the quality and quantity of soil materials which could be salvaged to <br />resoil disturbed areas at the project site. A total of 45 soil "profile descriptions" were completed as a result <br />of these five sampling programs and 17 samples were submitted to the Cooperative Extension Service <br />soil laboratory on the CSU campus for analysis. The parameters analyzed for included those identified <br />above as'routine° for the July sampling program and, typically ,SAR as well . <br />In 1988, IME conducted an extensive sampling program at the project site (IME 1989). A total of 19 <br />,~, overburden and five bench samples were collected during this sampling effort and delivered to ACZ <br />Laboratory Division for analyses. Laboratory analyses conducted on these samples included the following <br />o parameters. <br />pH Molybdenum (ppm) <br />` Electrical conductivity (mmhos/cm) Cadmium (ppm) <br />Y, <br />Percent organic matter Mercury (ppm) <br />Texture Lead (ppm) <br />:;, <br />~,.3 <br />N03-N (ppm) Copper (ppm) <br />Saturation percentage Selenium (ppm) <br />?a <br />4 <br />~~"~ <br />