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• TABLE 2.04.6-2 <br />PARAMETER, PROCEDURE, AND REFERENCE LIST FOR PHASE I AND PHASE II <br />SAMPLING AT THE PROPOSED NEW HORIZON 2 MINE <br />MONTROSE COUNTY, COLORADO -MARCH, 7988 <br />Sample preparation <br />Subsamplling less than 2mm fraction <br />Preparation of saturation extract antl saturation percentage <br />determination. <br />PH (determination using saturated paste) <br />Conductivity of satumtion extract in mmhos/cm at 25°C <br />Calcium content in the saturation extract in meq/I <br />Magnesium content in the saturation extract in meq/I <br />Sodium content in the saturation extract in meq/I <br />• SAR <br />ESP in % (determined if SAR is greater than 11) <br />Sulfate content in [he saturation extract in meq/I <br />Total alkalinity in the saturation extract in meq/I <br />Nitrate-Nitrogen in the saturation extract in ppm <br />Ammonium-nitrogen (extractable) in ppm <br />Samples were dried at less than 35°C and crushed to pass a <br />10 mesh sieve (excessive gdnding was avoided. <br />USDA (1969), Method 1, p. 83-84. <br />USDA (7969), Methods 2 and 3a, pp. 84 and 88, antl Method <br />27b, p. 107. <br />USDA (1969), Method 21 a, p. 102. <br />Sandoval and Power (1978), Method 1, pp. 22-24. <br />Sandoval and Power (1978), Method 2, p. 24-26. <br />Same as Calcium <br />Same as Calcium. <br />USDA (1969), p. 26. <br />Sandoval and Power (1978), Method 6A, p. 9. <br />Sandoval and Power (1978), Method 7A, p. 29-30. <br />APHA (1980). Method 403, p. 253-257. <br />Page (1982), Section 10-3.6, p. 175. <br />Black (1965), Extraction by 2N NaCI, p. 1185-1212. 60 <br />mesh sieve. <br />• Revised 27 Aug 2002 21 <br />