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Location
Lexington, Kentucky
Start Date
6-5-2026 3:00 PM
End Date
6-5-2026 3:30 PM
Description
The treatment of water from a CCR unit is an important step in the closure strategy for surface impoundments to comply with 40 CFR §257.102(d)(2)(i) of the CCR rule. The unwatering and dewatering of a surface impoundment is a necessary first step in ensuring that the eventual closure of the unit will meet the requirements for closure in place described in 40 CFR §257.102(d). Depending on the operational conditions and requirements of the plant, the NDPES discharge limits, and the impacted water quality, the water treatment system needs can vary greatly. This presentation will outline a roadmap for assessment, evaluation, planning, design, construction, and operations related to CCR pond unwatering and dewatering treatment. We will explore the complexities of plant flows, water quality, ELG, water balance, etc. and how it relates to ongoing plant operations and closure in place construction activities. This presentation will discuss considerations in developing a basis of design for a temporary treatment system for varying flows and constituents while also considering available package systems and the vendors available to install and operate. Case studies will be reviewed to highlight the importance of a well-defined roadmap to water treatment and closure.
Document Type
Presentation
Archival?
Archival
Included in
Energy Systems Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Mining Engineering Commons, Oil, Gas, and Energy Commons, Structural Materials Commons, Sustainability Commons
Establishing a Roadmap for the Planning, Design, and Construction of a Water Treatment System for a CCR Unit Closure
Lexington, Kentucky
The treatment of water from a CCR unit is an important step in the closure strategy for surface impoundments to comply with 40 CFR §257.102(d)(2)(i) of the CCR rule. The unwatering and dewatering of a surface impoundment is a necessary first step in ensuring that the eventual closure of the unit will meet the requirements for closure in place described in 40 CFR §257.102(d). Depending on the operational conditions and requirements of the plant, the NDPES discharge limits, and the impacted water quality, the water treatment system needs can vary greatly. This presentation will outline a roadmap for assessment, evaluation, planning, design, construction, and operations related to CCR pond unwatering and dewatering treatment. We will explore the complexities of plant flows, water quality, ELG, water balance, etc. and how it relates to ongoing plant operations and closure in place construction activities. This presentation will discuss considerations in developing a basis of design for a temporary treatment system for varying flows and constituents while also considering available package systems and the vendors available to install and operate. Case studies will be reviewed to highlight the importance of a well-defined roadmap to water treatment and closure.
