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<br />Daub & Associates, Inc. Page 3-37 2015 NS Mine Plan Modification <br />1/5/2016 Section 3 General Site Conditions <br />example, soil samples for the alkali slick spots (samples Al) indicate an unsuitable <br />soil material with a high SAR. <br />Because there appears to be adequate topsoil material in the Project Area, only the <br />soils with good and fair ratings were used to calculate volumes of suitable material. <br />High sodium concentrations and coarse fragments are the most restrictive features <br />limiting the use of the Project Area soils. The lower 24 to 46-inch layer of the <br />Piceance soil and the soils found in slick spot areas have a high SAR and are rated <br />as unsuitable material. The channery coarse fragments in the Rentsac give this soil <br />a poor rating. Soils with high pH and high salt content were analyzed for <br />molybdenum, selenium, and boron. No chemical constituents were found in <br />concentrations that could pose a potential hazard to plants or animals. <br />Within the Project Area, assuming a 60 to 70 year mine life, approximately a <br />maximum of 260 acres of soil will be disturbed. At any one time, NS will utilize <br />existing disturbed land for development in an effort to minimize the disturbance of <br />land. In addition, reclamation activities will be ongoing during mining operations. <br />NS anticipates that the potential maximum disturbed acreage will not be attained. <br />Approximately 440,000 cubic yards of suitable soil will be available for use in <br />reclamation.