Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 517 - Disposal of Coal Combustion Residuals from Electric Utilities › Subchapter 15 - Closure and Post-Closure Care › Section 252:517-15-7 - Criteria for conducting the closure or retrofit of CCR units

Current through Vol. 41, No. 20, July 1, 2024
(a)
Closure of CCR unit; retrofit of
				CCR surface impoundment.
Closure of a CCR landfill, CCR surface
				impoundment, or any lateral expansion of a CCR unit must be completed either by
				leaving the CCR in place and installing a final cover system or through removal
				of the CCR and decontamination of the CCR unit, as described in paragraphs (b)
				through (j) of this Section. Retrofit of a CCR surface impoundment must be
				completed in accordance with the requirements in paragraph (k) of this
				Section.
(b)
Written closure
				plan.
(1)
Content of the
				plan.
The owner or operator of a CCR unit must prepare a written closure
				plan that describes the steps necessary to close the CCR unit at any point
				during the active life of the CCR unit consistent with recognized and generally
				accepted good engineering practices. The written closure plan must include, at
				a minimum, the information specified in paragraphs (b)(1)(A) through (F)of this
				Section.
(A) A narrative description of how
				the CCR unit will be closed in accordance with this Section.
(B) If closure of the CCR unit will be
				accomplished through removal of CCR from the CCR unit, a description of the
				procedures to remove the CCR and decontaminate the CCR unit in accordance with
				paragraph (c) of this Section.
(C)
				If closure of the CCR unit will be accomplished by leaving CCR in place, a
				description of the final cover system, designed in accordance with paragraph
				(d) of this Section, and the methods and procedures to be used to install the
				final cover. The closure plan must also discuss how the final cover system will
				achieve the performance standards specified in paragraph (d) of this Section.
(D) An estimate of the maximum
				inventory of CCR ever on-site over the active life of the CCR unit.
(E) An estimate of the largest area of the
				CCR unit ever requiring a final cover as required by paragraph (d) of this
				Section at any time during the CCR unit's active life.
(F) A schedule for completing all activities
				necessary to satisfy the closure criteria in this Section, including an
				estimate of the year in which all closure activities for the CCR unit will be
				completed. The schedule should provide sufficient information to describe the
				sequential steps that will be taken to close the CCR unit, including
				identification of major milestones such as coordinating with and obtaining
				necessary approvals and permits from other agencies, the dewatering and
				stabilization phases of CCR surface impoundment closure, or installation of the
				final cover system, and the estimated timeframes to complete each step or phase
				of CCR unit closure. When preparing the written closure plan, if the owner or
				operator of a CCR unit estimates that the time required to complete closure
				will exceed the timeframes specified in paragraph (f)(1) of this Section, the
				written closure plan must include the site-specific information, factors and
				considerations that would support any time extension sought under paragraph
				(f)(2) of this Section.