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2) Care was taken to keep the sample free of oil and grease. <br />3) If drilling fluids are used, an organic polymer such as Revert was <br />used to minimize contamination from drilling fluids. <br />After the cores were obtained, samples from each strata were sent in for <br />analysis. All strata were analyzed individually. Samples from short <br />strata were taken out of the middle 'of the strata. Samples from long <br />strata were composites, taken from Che top, middle, and bottom of the <br />strata. All samples were analyzed for N03-N, P, K, Zn, Fe, Mn, Cu, Pb, <br />Cd, Mo, As, Se, Ca, Mg, Na, B, Hg, V, F, pH, EC, SA R, texture, CaC03, <br />pyritic S, 804-5, organic S, and acid base potential. All core strata <br />were kept clean and free from contamination. All strata were kept for <br />future analysis. Core strata were wrapped in plastic and%stored in core <br />boxes. Cored drill holes were located on Map M42. Analysis data was <br />identified by the drill hole number. <br />Litho logical core holes were drilled for the Stearns-Roger report in the <br />early 1970's and Trapper core holes were drilled in 1984, 1985 and 1987. <br />The core selection for this report was based on the availability of cor- <br />responding spoil areas to previously identified problematic overburden <br />core holes. <br />4.2 Results <br />Spoil laboratory analysis was conducted by the Colorado State University <br />Soil Testing Laboratory in 1985-87 and are provided in Table I-1. Inter- <br />pretation of Chese data are presented in Table I-3 and include verbal <br />interpretations which are intended to describe laboratory values in rela- <br />tive practical terms. "Good" is used to indicate data characteristics <br />that do not present a problem while "excessive" is used to point out <br />which values may present a possible toxicity problem. Following is a <br />brief description of each parameter as described in the literature and <br />how suitability criteria were assigned to each. The below listed spoil <br />values are for three sampling years (1985-87). <br />pH - Measure of the degree of acidity or alkalinity of a soil. Optimum <br />pH values range from 6.0-8.4 (Merritt 1983). Suitable pH values <br />range from 5.5-8.8. Actual spoil pH determination ranged from a low <br />of 6.8 to a high of 8.5 (z = 7.4) on Trapper spoils. <br />Electrical Conductivity - Conductivity is an indirect measure of the <br />soluable salts in the soil. Optimum EC values in terms of plant <br />growth are <4.0 (Merritt 1983). Suitable EC values are < 12 <br />mmhos/cm. Actual spoil analysis at Trapper ranged from .4 to 4.5 <br />(T = 2.0). <br />cont. <br />