Tag Archives: coal combustion residual

How Future Use Guides Ash Pond Closure Strategies – WOCA 2019

April 18, 2019

World of Coal Ash in St. Louis, May –13-16, 2019 event details.

Even the simplest impoundment closures come with design challenges. It is a challenge to navigate project constraints, whether technical, regulatory, or financial, to design and implement an effective closure strategy. Cost often helps to determine the “balance” between project constraints when the future end use of a closed CCR surface impoundment or the property it occupies is undefined. When a post-closure end use is defined, finding balance among project constraints to best serve that future use provides rewarding challenges.

SCS Engineers has navigated this balancing act on impoundment closure projects during facility decommissioning. Through a presentation of case studies, you will learn how this team has approached ash pond closure planning and execution where the future use of the impoundment site ranged from undefined to the home of a new solar photovoltaic installation. Examples also include potential future industrial use or property sale.

Case studies will highlight how geotechnical, hydrological, regulatory, or simple physical constraints have influenced the design and implementation of CCR surface impoundment closures.

Speaker:

 

 

 

Posted by Diane Samuels at 6:00 am
Tag Archives: coal combustion residual

CCR Leachate Disposal Options Evaluation and Disposal – WOCA 2019

April 11, 2019

World of Coal Ash in St. Louis, May –13-16, 2019 event details.

A Midwest power plant that was constructed as a zero discharge facility in 2012 was experiencing water management issues due to excessive absorber recycle water with concentrated chlorides and leachate generation from the CCR landfill at the facility. The facility started exploring wastewater management options in 2013 that consisted of evaluating the feasibility of a deep injection well as a fluid disposal option and the results indicated that this option was a technically feasible alternative.

From 2014-2015 the plant continued to experience water balance and chlorides management challenges and conducted a plant review and water balance study to see if the chloride concentration and leachate generation issue could be resolved through process changes within the plant. The resulting water balance study concluded that while minor changes and optimizations could occur, it would not resolve the underlying water quality or water balance challenges at the facility. Other water disposal and management options were also explored by the plant in that included RO, evaporators and the deep well as retained alternatives.

In 2016, the deep injection well was selected as the preferred water management alternative and permitting was initiated. The goal was to get the deep well permitting started while the plant refined plant process modifications and additional water quality data on the feed water(s) is collected.

Water quality data from the site has indicated that iron, carbonate and sulfate are the dominant water quality parameters that drive scaling within the current system and will need to be addressed prior to injection so the well does no scale and clog.

The deep well was completed in 2018 and the final surface treatment system is currently under design. The facility anticipates full-scale operation of the system in early 2020.

Speaker:

 

 

 

 

 

 

 

Posted by Diane Samuels at 6:00 am
Tag Archives: coal combustion residual

State vs Federal CCR Rule Regulations: Comparisons and Impacts

March 28, 2019

World of Coal Ash in St. Louis, May –13-16, 2019 event details.

When the Federal CCR rule went into effect in 2015, it was a new regulatory layer on top of a widely varying landscape of state regulations affecting CCR management in impoundments and landfills. Some states already had significant regulations on the books for CCR impoundments and/or landfills, while others did not. Where state regulations existed, they varied widely from state to state. While a few states have moved toward closing the gap between state and federal CCR requirements, many utilities continue to face confusing and conflicting requirements coming from different regulatory programs as they move ahead with managing their CCR facilities.

Through case studies, SCS Engineers will share state-versus-federal regulatory challenges utilities have encountered in different regions of the country during landfill design and management, impoundment closure, and groundwater monitoring and reporting since the implementation of the Federal CCR Rule. For example, some sites have completely distinct groundwater monitoring programs under state versus federal rules, with different well locations, well depths, and monitoring parameters for the same facility. We will highlight unique approaches to bridging regulatory gaps and resolving regulatory conflicts between state and Federal CCR requirements.

SCS will also share insights gained on the long-term potential for regulatory resolution of these issues based on discussions with state regulators in multiple states.

Speakers:

 

 

 

Posted by Diane Samuels at 6:00 am
Tag Archives: coal combustion residual

Minimize CCR Landfill Leachate and Contact Water Management

March 21, 2019

World of Coal Ash in St. Louis, May –13-16, 2019 event details.

Learn how to minimize leachate and contact water management at coal combustion residual (CCR) landfills using good design, physical controls, and operational practices. Through our presentation of case studies, you will learn how to assess leachate and contact water management issues and implement techniques to minimize leachate and contact water management at your landfill.

Leachate management and contact water management at CCR landfills can be expensive, cause operational headaches, and divert valuable resources from other critical plant needs. Our presentation will provide you with useful tools to ensure your landfill is designed and operated to effectively reduce leachate and contact water and alleviate operator stress. We will present case studies that highlight how design features, physical controls, and operational practices have effectively decreased leachate and contact water management at CCR landfills.

Speakers:

 

 

Posted by Diane Samuels at 6:00 am
Tag Archives: coal combustion residual

How Future Use Guides Ash Pond Closure Strategies at EUEC 2019

January 22, 2019

 

EUEC 2019

 

Even the simplest impoundment closures come with design challenges. It is a challenge to navigate project constraints, whether technical, regulatory, or financial, to design and implement an effective closure strategy. Cost often helps to determine the “balance” between project constraints when the future end use of a closed CCR surface impoundment or the property it occupies is undefined. When a post-closure end use is defined, finding balance among project constraints to best serve that future use provides rewarding challenges.

SCS Engineers has navigated this balancing act on impoundment closure projects during generating facility decommissioning. Through a presentation of case studies, you can learn how this team has approached ash pond closure planning and execution where the future use of the impoundment site ranged from undefined to the home of a new solar photovoltaic installation. Examples also include potential future industrial use or property sale.

Case studies will highlight how geotechnical, hydrological, regulatory, or simple physical constraints have influenced the design and implementation of CCR surface impoundment closures.

EUEC 2019 in San Diego, February 25-27, 2019.  Conference details here.

 

Posted by Diane Samuels at 10:40 am
Tag Archives: coal combustion residual

Minimize CCR Landfill Leachate and Contact Water Management

December 21, 2018

Learn how to minimize leachate and contact water management at coal combustion residual (CCR) landfills using good design, physical controls, and operational practices.

Through this SCS presentation of case studies, you will learn how to assess leachate and contact water management issues and implement techniques to minimize leachate and contact water management at your landfill.

Leachate management and contact water management at CCR landfills can be expensive, cause operational headaches, and divert valuable resources from other critical plant needs. Our presentation will provide you with useful tools to ensure your landfill is designed and operated to effectively reduce leachate and contact water and alleviate operator stress. We will present case studies that highlight how design features, physical controls, and operational practices have effectively decreased leachate and contact water management at CCR landfills.

2019 EUEC in San Diego, February 25-17, 2019. Conference details here.

Posted by Diane Samuels at 6:00 am
Tag Archives: coal combustion residual

How Future Use Guides Ash Pond Closure Strategies

December 19, 2018

Even the simplest impoundment closures come with design challenges. It is a challenge to navigate project constraints, whether technical, regulatory, or financial, to design and implement an effective closure strategy. Cost often helps to determine the “balance” between project constraints when the future end use of a closed CCR surface impoundment or the property it occupies is undefined. When a post-closure end use is defined, finding balance among project constraints to best serve that future use provides rewarding challenges.

SCS Engineers has navigated this balancing act on impoundment closure projects during generating facility decommissioning. Through a presentation of case studies, you can learn how this team has approached ash pond closure planning and execution where the future use of the impoundment site ranged from undefined to the home of a new solar photovoltaic installation. Examples also include potential future industrial use or property sale.

Case studies will highlight how geotechnical, hydrological, regulatory, or simple physical constraints have influenced the design and implementation of CCR surface impoundment closures.

EUEC 2019 in San Diego, February 25-27, 2019.  Conference details here.

 

Posted by Diane Samuels at 6:00 am
Tag Archives: coal combustion residual

USWAG CCR Workshop – Washington DC Metro Area, May 22 – 23, 2018

May 17, 2018

Leachate management and contact water management at CCR landfills can be expensive, cause operational headaches, and divert valuable resources from other critical plant needs. The SCS Engineers’ presentation will provide you with useful tools to ensure your landfill is designed and operated to cost-effectively reduce leachate and contact water and alleviate operator stress. We will present case studies that highlight how design features, physical controls, and operational practices have effectively decreased leachate and contact water management at CCR landfills.

USWAG event details – click here.

USWAG Leachate Management Workshop Video

 

 

Posted by Diane Samuels at 6:02 am
Tag Archives: coal combustion residual

SCS Advice from the Field: Minimizing CCR Landfill Water Management Costs

May 10, 2018

 

Learn how to minimize leachate and contact water management costs at coal combustion residual (CCR) landfills using good design, physical controls, and operational practices. Through the SCS use of case studies, you will learn how to assess leachate and contact water management issues and implement cost saving techniques at your landfill.

Leachate management and contact water management at CCR landfills can be expensive, cause operational headaches, and divert valuable resources from other critical plant needs. The SCS presentation at USWAG will provide you with useful tools to ensure your landfill is designed and operated to cost-effectively reduce leachate and contact water and alleviate operator stress. We will present case studies that highlight how design features, physical controls, and operational practices have effectively decreased leachate and contact water management at CCR landfills.

Don’t miss this USWAG Presentation in May…See more about this USWAG event here.

SCS Engineers – Serving Utilities Nationwide

 

 

 

Posted by Diane Samuels at 6:03 am
Tag Archives: coal combustion residual

SCS Engineers Technical Bulletin – USEPA Motion for Voluntary Remand of Five Provisions of the CCR Rule

February 26, 2018

In a Motion filed on November 7, the U.S. Environmental Protection Agency (USEPA) requested remand of five provisions of the Coal Combustion Residuals (CCR) Rule (40 CFR Parts 257 and 261), which would allow the agency to reconsider the provisions. This SCS Engineers Technical Bulletin covers the five provisions and the basis for their reconsideration. Read the full text here.

Oral arguments on EPA’s motion took place on November 20, 2017.  EPA had asked that oral arguments be postponed, and all other aspects of the litigation are suspended until it could rule, but the court did not agree. The current provisions in this Technical Bulletin remain in place unless and until USEPA revises or rescinds them in a future rulemaking.

SCS Engineers will continue to track these issues and keep you informed. Join our Technical Bulletin email list by clicking here, or follow SCS on LinkedIn, Facebook, or Twitter .

 

 

Posted by Diane Samuels at 6:01 am
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