By - Jon Brown

Coal Ash Impoundments: Closure Methods and Challenges
August 12-13, 2019 | Denver, CO

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Overview

With the impact and enforcement of the ever-changing Federal Coal Combustion Residuals (CCR) Rule, owners and operators of coal ash impoundments have been engaged in and are facing the closure of their impoundments. This symposium shares the expertise of industry leaders from multiple service providers. The purpose of the symposium is to give individuals involved with closure projects either directly or indirectly, a more comprehensive understanding of the process and steps involved in dewatering and closure of these impoundments and related issues for these sites.

If this event is of interest you may also be interested in this related event

Coal Plant Closure: A Detailed Look, August 13-14, 2019 in Denver, CO

The program will dive into detail on a variety of those steps such as: geotechnical work, dewatering, water treatment, stability issues, groundwater monitoring and corrective action, some construction approaches and methods, and legal and regulation challenges facing these projects. Attendees will gain real-world knowledge that can be applied directly to their projects.

Learning Outcomes         

  • Review the CCR Rule evolution and potential future changes
  • Review the information to look for in geotechnical investigations and receive recommendations
  • Engage in a discussion on ash stabilization and the steps needed and taken during the dewatering process
  • Listen to experts discuss structural stability issues and their solutions for closure
  • Discuss the options for dewatering
  • List options for surface and groundwater monitoring, planning, action and remediation
  • Discuss ash recycling and beneficial reuse possibilities and methods of capture

Credits

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EUCI has been accredited as an Authorized Provider by the International Association for Continuing Education and Training (IACET).  In obtaining this accreditation, EUCI has demonstrated that it  complies with the ANSI/IACET Standard which is recognized internationally as a standard of good practice. As a result of their Authorized Provider status, EUCI is authorized to offer IACET CEUs for its programs that qualify under the ANSI/IACET Standard.

EUCI is authorized by IACET to offer 1.0 CEUs for this event.

 

Requirements for Successful Completion of Program

Participants must sign in/out each day, be in attendance for the entirety of the course to be eligible for continuing education credit.

Instructional Methods

Case studies, PowerPoint presentations, and group discussion will be used in this event.

Agenda

Monday, August 12, 2019

8:00 – 8:30 a.m. :: Registration & Continental Breakfast

8:30 a.m. – 4:00 p.m. :: Course Timing

12:00 – 1:00 p.m. :: Group Luncheon


The Evolution of CCR Rule Requirements

  • Addressing court decisions
  • Rule amendments
  • Potential future EPA rulemakings
    • Impoundment closure
    • Groundwater

Compaction for Ground Improvement, Settlement Removal and Permeability Reduction in Soils and Ash Deposits

  • Commonly used Compaction Methods
  • High Energy Impact Compaction
    • Verification technologies
    • Vibratory roller compaction
    • Rapid impact compaction
    • Dynamic compaction
    • Deep vibratory compaction
  • Comparison Factors
    • Depth of influence
    • Surface coverage
    • Productivity
    • Testing
    • Certification technologies/methods

Coal Ash Beneficiation

  • Encapsulated Beneficial Use Overview
    • Ash as a performance-enhancing additive
      • Concrete
      • Other materials
    • Incentives for Beneficial Uses
      • Reducing disposal costs
      • Environmental stewardship

Application of ISS and Hydraulic Containment for CCR Impoundment Closures

  • Unstable nature of saturated CCR material
  • In-situ stabilization (ISS) process and technology
  • Application of ISS technology for in-place closure of CCR impoundments

In-Depth Water Treatment

  • Traditional Water Treatment Techniques
  • Project-Specific Treatment Systems
    • Arsenic
    • Selenium
    • Thallium
    • Other metals
  • Pontoon Systems for Decanting Surface Water
  • Collection Systems for Removing and Treating Interstitial Water
  • Groundwater Collection and Treatment Systems

Tuesday, August 13, 2019

8:00 – 8:30 a.m. :: Continental Breakfast

8:30 a.m. – 12:00 p.m. :: Course Timing


Geotechnical Behaviors of Ash

  • Geotechnical Differences Between Soil and Ash
  • Field vs Laboratory Testing
  • Moisture Sensitivity
  • Capillarity
  • Vibration Sensitivity

Necessary Geotechnical Behaviors for Pond Closure

  • Slope Stabilization 
  • Providing a Stable Crust
  • Mitigating Localized Liquefaction
  • Ash Stabilized in Place

Methods of Dewatering Ash

  • Drainage Techniques
    • Rim ditching and sumping
    • Wellpoints
    • Deep wells
    • Other drainage methods
  • Selecting a Drainage (Dewatering) Technique
  • Safe Access for Dewatering System Installation
  • Geotechnical Investigations and Pilot Tests

Geo-Structural Improvements in Ash

  • In-Situ Mixing
  • Retained Excavations in Ash
  • Barrier Walls
  • Grouting Techniques

Instrumentation and Monitoring

  • Evaluation of Geotechnical Data
  • Monitoring for Liquefaction
  • In-Situ Measurements of Shear Strength

Case Studies in Ash Stabilization

  • Geo-Structural Applications in Ash
  • Shallow & Deep Ponds
  • Lined and Unlined Impoundments

Water Treatment Overview

  • Ponded Water
  • Ash Pore Water
  • Available Treatment Technologies

An Integrated Approach to Closure

  • Relationship Between Schedule, Safety, Quality, and Cost
  • Project Acceleration with Early Dewatering

Instructors

Amy Antoniolli, Counsel, Schiff Hardin

Charles Davis, Landpac Ground Engineering Group

Bill Fedorka, P.E., VP of Engineering & Projects, The SEFA Group

Greg Landry, PE, Chief Dewatering Engineer, Moretrench

Dr. Paul Lear, Technical Director, Great Lakes E&I

Paul Schmall, PhD, PE, Chief Engineer, Moretrench

Location

Denver Marriott South at Park Meadows

10345 Park Meadows Drive

Lone Tree, CO 80124

Reserve your room:

please call 1-303-925-0004

Room Block Reserved For:

Nights of August 11 – 13, 2019

Room rate through EUCI:

$184.00 single or double plus applicable taxes
Make your reservations prior to July 21, 2019.

 

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