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3.27 Chloride • <br />Chloride concentrations range from less than 3 to 222 ppm in the <br />overburden anti from less than 3 to 57 ppm in the underburden. <br />Concentrations generally range between 5 and 15 ppm. The high <br />concentrations of chloride are associated with strata high in sodium. No <br />reclamation problems are anticipated from chlorides. <br />3.28 Bicarbonate <br />Bicarbonate values range from less than 0.1 to 5.9 meq/1 in the <br />overburden and from less than 0.1 to 9.8 meq/1 in the underburden. <br />Concentrations generally range between 1 and 2 meq/1. The bicarbonate <br />anion is dominant at the higher pH levels. <br />3.29 Carbonate <br />Carbonate values range from less than 0.1 to 0.1 meq/1 in the overburden <br />and from less thabn 0.1 to 1.3 meq/1 in the underburden. Concentrations <br />are predominantly less than 0.1 meq/1. <br />3.30 Sulfate • <br />Sulfate values range from less than 10 to 115 meq/1 in the overburden and <br />from less than 10 to 78 meq/1 in the underburden. The highest sulfate <br />levels are associated with low pH strata. Levels of sulfate at Seneca are <br />not considered detrimental to good reclamation. <br />3.31 Sulfur-Pyritic, Sulfate, Organic, and Total <br />Total sulfur levels range from less than 0.10 to 1.98 percent in the <br />overburden and from less than 0.10 to 2.40 percent in the underburden. The <br />highest levels of sulfur are associated with the low pH layers and the <br />coal strata. Pyritic sulfur represents 80 percent of the total sulfur <br />contained in the overburden. The sulfate and organic fractions represent <br />15 and 5 percent, respectively. The highest pyritic zones occur in Wolf <br />Creek overburden when the Wolf Creek coal seam is less than 70 feet deep. <br />The Wolf Creek spoils will be sampled, tested, and handled according to <br />procedures stated in Pages 6-29, 6-30, 6-33, 6-34, 6-153, 6-153x, and <br />6-164 of this application. <br />6-151 Revised 08/i7/90 <br />