August 3, 2021

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Geosyntec Experts to Present at Utility Solid Waste Activities Group Coal Combustion Residual Workshop Session

Bob Glazier, P.G. (Maryland) will present on "Problems with the Federal CCR Rule Groundwater Monitoring and Corrective Action Regulations and Work-Arounds" while Herwig Goldemund, Ph.D. (Georgia) and Jim Linton (Florida) will present on "Phytoremediation Using TreeWell® Technology: An Innovative Approach to Groundwater Remediation at CCR Sites" at the Utility Solid Waste Activities Group (USWAG) Coal Combustion Residual (CCR) Workshop's Session 5 on August 5, 2021.

Bob is a Principal Environmental Consultant with more than 35 years of experience focused on solid and radioactive waste disposal facility siting/permitting, groundwater monitoring, and environmental remediation for private-sector clients. Bob's remediation experience includes a wide range of project drivers including CERCLA, RCRA, and state brownfields/voluntary action regulations. He has evaluated in situ manipulation of pH and redox conditions to limit the groundwater mobility of CCR such as arsenic, boron, sulfate, and selenium. He has also completed several alternative source demonstrations using forensic tools such as stable isotopes and had recently completed several Assessment of Corrective Measures studies for CCR units. He is currently serving as the senior technical director for several large CCR groundwater remediation projects in both the eastern and western United States.

Herwig is a Principal Scientist with more than 20 years of academic and professional experience as an environmental scientist and project manager. His expertise at CCR landfills and ash ponds is directed at geochemical data analysis and report development for the environmental aspect of investigations to assess closure strategies for these units.  Furthermore, he has been involved in the implementation of alternate source demonstrations (ASDs) to show that certain CCR constituents are present in groundwater due to natural conditions. He has also evaluated groundwater geochemistry surrounding several CCR units to develop remedial strategies for groundwater and surface seeps.

Jim is a Principal Environmental Scientist with more than 30 years of experience focused on site assessment and remediation. He specializes in innovative contaminated site investigations, remedial strategy development, biological population studies, wetland restoration, phytoremediation and regulatory compliance. Jim has pioneered the use of engineered phytoremediation to address groundwater contaminated with chlorinated solvents, 1,4-dioxane and other classes of contaminants as a cost-effective, green and sustainable alternative to traditional pump and treat remedies, and has successfully closed sites using this technology in a number of regions of the United States.

USWAG is responsible for addressing waste, byproduct and chemical management, and transportation issues on behalf of the utility industry. USWAG members include more than 130 utility operating companies, power producers, energy companies, and industry associations. USWAG's core mission is to support the industry's efforts to comply with federal environmental regulations, protect the environment, and serve its customers. As part of that effort, USWAG engages in regulatory advocacy, regulatory analysis and compliance assistance, and information exchange.

Geosyntec Participation

Title: Problems with the Federal CCR Rule Groundwater Monitoring and Corrective Action Regulations and Work-Arounds
Presenter: Bob Glazier, P.G., Geosyntec
Description: Regulated units under the Federal Coal Combustion Residuals Rule (CCR Rule) are now over five years into the compliance and corrective action pipeline for groundwater.  Stake holders have identified concerns and ambiguities with the original 2015 CCR Rule and regulators have responded with several modifications to the Rule but some important issues remain unresolved.  This presentation will briefly review some of these problems, including point of compliance, cleanup timeframe expectations, Technical Impracticability, delineation next to waterways, and utility of risk assessment in decision making.  Potential work arounds for these issues will be discussed and relevant experience at a CERCLA landfill site.

Title: Phytoremediation Using TreeWell® Technology: An Innovative Approach to Groundwater Remediation at CCR Sites
Presenter: Herwig Goldemund, Ph.D., Jim Linton, Geosyntec
Description: The use of green and sustainable approaches to site remediation has gained increased acceptance by site owners, regulators, and other stakeholders.  Traditional phytoremediation methodologies, however, have often been limited in their effectiveness due to constraints including inaccessibility to deep groundwater, poor growing conditions and/or highly elevated (and potentially phytotoxic) levels of contaminants.  More recently, an engineered approach to phytoremediation, the TreeWell® system, has been shown to overcome typical limitations of applying phytoremediation to groundwater cleanup.  This phytoremediation system targets specific groundwater strata, at depths of 50 feet (15 meters) below ground surface (or more), and forces roots to use only water from a specific targeted zone.  High contaminant concentrations and resulting phytotoxicity can be mitigated through use of select amendments within the treatment column of the TreeWell unit.

TreeWell technology has great potential for groundwater remediation applications at CCR sites, especially as an enhancement to source control measures.  Observed groundwater impacts around CCR sites are generally limited and concentrations of groundwater contaminants are typically low.  In addition, the TreeWell system can concurrently address the mix of inorganic constituents found in groundwater associated with CCR sites.

The TreeWell system can be used for both hydraulic control of contaminant plumes and for groundwater contaminant treatment via degradation or immobilization/containment mechanisms.  This presentation will discuss mechanisms utilized in phytoremediation systems applied to address sites impacted by inorganic contaminants, including those typically encountered at CCR sites, and will also discuss the design approach and present two case studies demonstrating the successful use of engineered phytoremediation systems.

Learn More

About the event: https://www.uswag.org/meetings/20210408CCR
About the Utility Solid Waste Activities Group: https://www.uswag.org/
For consultation regarding CCR remediation, contact Bob at This email address is being protected from spambots. You need JavaScript enabled to view it., Herwig at This email address is being protected from spambots. You need JavaScript enabled to view it., or Jim Linton at This email address is being protected from spambots. You need JavaScript enabled to view it.  
Learn more about Bob Glazier: https://www.geosyntec.com/people/robert-glazier
Learn more about Herwig Goldemund: https://www.geosyntec.com/people/herwig-goldemund
Learn more about Jim Linton: https://www.geosyntec.com/people/james-linton