slopes. A. Except as provided in subsection B of this section, the owner and operator of a solid waste landfill shall ensure the following: 1. Exterior slopes, to the edge of the permitted footprint, are maintained at all times to be no steeper overall than four (4) horizontal to one (1) vertical (4:1), except as otherwise provided in a plan approved by the Department of Environmental Quality; and 2. All interior slopes are maintained at all times to be no steeper overall than three (3) horizontal to one (1) vertical (3:1), except as otherwise provided in a plan approved by the Department. B. The working face slopes of a solid waste landfill may vary during daily placement of waste but shall be graded to meet the applicable interior or exterior slope grades prior to placement of the daily cover of soil or approved alternate daily cover material. C. The Environmental Quality Board is authorized to promulgate rules recommended by the Solid Waste Management Advisory Council as needed to implement the provisions of this section.
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