CCR leachate disposal

December 1, 2022

SCS Engineers - CCR management and decommissioning


The USWAG Utility Decommissioning Workshop in Crystal City, VA, begins on December 12th.  This valuable workshop provides utilities the chance to focus on topics that can save time and money while working toward new goals. We’ll be covering these topics:

  • Planning and Environmental Compliance Considerations
  • In-Place Retirement of Power Plants
  • End-of-Use Management of Wind Generation Assets
  • Solar Systems End of Life
  • Planning for Future Disposal of Renewable Generation Assets
  • Closure by Beneficial Reuse of Legacy Ash Storage Sites
  • Preparing for Abatement and Demolition
  • Deep Well Injection (DIW)

SCS Engineers Vice President and Deep Well Injection Expert, Monte Markley, will present a session on how deep well injection is facilitating site development and minimizing post closure costs for utilities nationwide. The challange for sustainably managing CCR leachate and other liquid residuals as a facility is decommissioned is met in phases by facilitating site redevelopment allowing leachate lagoon or evaporation basins to be decommissioned in the short term and utilizing the DIW for long term leachate disposal. The small foot print of a deep injection well and the ability to safely, continuously operate with minimal staffing allows conventional leachate management infrastructure real estate to be re-purposed. Having the ability to decommission leachate lagoons and other water treatment infrastructure (e.g. groundwater pump and treat systems) within 18-24 months after closure allows owners to avoid significant post closure care costs. Avoided costs include long term operrations and maintenance, regulatory reporting, and financial assurance. Mr. Markley’s presentation based on case studies outlines the requirements to get a well permitted and operational at a facility, and includes examples of capital and opex costs avoided.





Posted by Diane Samuels at 6:00 am

March 2, 2020

CCR – Disposal Regulation Revisions & Permitting Program by the U.S. Environmental Protection Agency moves forward on two matters that proposed to revise its 2015 solid waste regulations for the disposal of coal combustion residuals.

On February 19, 2020, EPA announced what it said is the last of planned actions to implement the Congressional mandates, respond to petitions, address the results of litigation, and apply lessons learned to ensure smoother implementation of the regulations. In a rulemaking entitled “A Holistic Approach to Closure Part B,” EPA proposed the following revisions:

  • Procedures to allow facilities to request approval to use an alternate liner for CCR surface impoundments;
  • Two co-proposed options to allow the use of CCR during unit closure;
  • An additional closure option for CCR units being closed by removal of CCR; and
  • Requirements for annual closure progress reports.

One of the proposed options for allowing the use of CCR for closure activities would allow coal ash to be moved between units at the same facility and consolidated at impoundments that are scheduled for closure. The second option would allow utilities to beneficially use coal ash in disposal unit closure activities.

Under the proposed rule, utilities would need to submit an alternative liner demonstration within 13 months of the final rule, with the possibility of extensions. The EPA noted there would likely be few basins able to meet the alternative liner requirements.

The proposal would also allow utilities to continue disposing ash into some ponds even after the pond has been scheduled for closure. Ponds will still be able to take in ash if the ash remains under a certain volume — and this includes ponds located in unstable areas, such as in a seismic zone or within five feet of a waterway.

EPA will seek comment on this proposal during a 45-day public comment period that will commence when it is published in the Federal Register. EPA will also hold a virtual public hearing on the proposal on April 9, 2020.


On February 20, 2020, EPA’s previously announced proposed rule to establish a Federal CCR Permitting Program was published in the Federal Register. The creation of a federal permitting program for coal ash disposal regulations was required by Congress in the 2016 Water Infrastructure Improvements for the Nation (WIIN) Act, which shifted enforcement authority for EPA’s disposal standards from citizen lawsuits to state environmental regulators. The federal permit program is intended for use in states that do not seek EPA approval for their own programs and for use in Indian Country.

The proposed federal program includes electronic permitting and sets requirements for permit applications, content and modification, as well as procedural requirements.

EPA will accept public comment on the proposed program until April 20, 2020. The agency will also hold a virtual public hearing on the matter on April 15, 2020.

Media reports of the announcements included coverage by The Hill, E&E News, Utility Dive, Phoenix Newsletter, and a pair of stories by Bloomberg.


Coal Combustion Residuals solutions, case studies, articles are here, including information about coal ash landfills, support, and closures.




Posted by Diane Samuels at 6:00 am