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2019 Plan of Operations Modification American Gypsum Company, LLC <br /> on public lands that are reasonably incident to American Gypsum's mining activities. Drawings 03 <br /> and 15 show the detailed locations of surface facilities. <br /> TABLE 6.5: FACILITIES ON PUBLIC LANDS <br /> Estimated Period of Schedule for <br /> Structure Location Use Removal and <br /> Reclamation <br /> Mine access and haul roads Drawing 03 Duration of mine life See reclamation plan <br /> Mine entrance gate Drawing 03 Duration of mine life See reclamation plan <br /> Shop and office facilities Drawing503 and Duration of mine life See reclamation plan <br /> Growth medium stockpile Drawing 03 Through initial See reclamation plan <br /> reclamation <br /> Mine pits Drawing 03 Duration of operations See reclamation plan <br /> Equipment staging areas Drawing 15 Duration of mine life I See reclamation plan <br /> 6.12 Hazmat <br /> Gypsum is processed into wallboard directly at the plant; there are no on-site processing facilities <br /> and therefore no processing chemicals or acid-producing materials used or stored at the Mine. <br /> Hazardous materials would not be stored within the proposed disturbance area. Spills would be <br /> reported and managed according to American Gypsum's Spill Prevention, Control, and <br /> Countermeasure (SPCC) Plan (Environmental Solutions, 2019). <br /> 6.13 Rock Characterization and Handling Plans <br /> During drilling, material was classified as "gypsum" or "waste" (intraburden), characterizing <br /> intraburden as material with less than 85% gypsum. During active mining, material is <br /> characterized as gypsum or intraburden based on visual observations. <br /> 6.13.1 Materials Characterized <br /> Table 6.6 lists materials characterized, and method used for characterization. <br /> TABLE 6.6: CHARACTERIZATION METHODS <br /> MethodMaterial Characterization <br /> Waste Rock(Intraburden) Less than 85%gypsum as defined by a combined <br /> moisture test during exploration <br /> Ore(Gypsum) Greater than 85%gypsum as defined by a <br /> combined moisture test during exploration <br /> Pit backfill rock(Intraburden) See Waste Rock(Intraburden) <br /> Cap/cover materials (Growth Medium) Visual observations and historical information <br /> Am Gypsum Poo Mod ISSD 20190909 September 2019 [311 <br />