April 2, 2021

« All News

Geosyntec Personnel to Present on CCR Compliance and Remediation in USWAG CCR Workshop Series

Rob Ferree, CPG, (Michigan), Ryan Fimmen, Ph.D., (Ohio), Herwig Goldemund, Ph.D. (Georgia), Jim Linton (Florida), and Robert Glazier, P.G. (Maryland) will present on coal combustion residuals (CCR) compliance and remediation in the Utility Solid Waste Activities Group (USWAG) CCR Workshop Series that runs from April 8 through August 5, 2021.

Rob and Ryan's co-presenter is Harold Register, Consumers Energy.

Robert Ferree is a Senior Principal Geologist based in Michigan with more than 35 years of experience focused on hydrogeologic investigations; vapor intrusion, remedial investigations; underground storage tank (UST) removal; soil and groundwater sampling in accordance with RCRA and CERCLA guidance; remediation system design; remedial system installation; aquifer test performance and analysis; and environmental site assessments (ESAs).

Ryan Fimmen is a Principal Scientist based in Ohio with more than 12 years of experience in the remediation of soils, sediments, and groundwater and in contaminant fate and transformation. His work with CCR management has included developing a decision framework document for the Electric Power Research Institute for the evaluation of the application of monitored natural attenuation at sites with CCR-impacted groundwater.

Jim Linton is a Principal Environmental Scientist based in Florida 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 developed feasibility studies and innovative remediation solutions for manufacturing facilities in the pesticide, electronics, and aerospace industries.

Robert Glazier is a Principal Environmental Consultant based in Maryland with more than 35 years of experience focused on site remediation, risk assessment, and environmental permitting associated with solid and hazardous waste landfills as well as power generation and manufacturing facilities. Bob's consulting services focus on the strategic management of environmental liabilities, working with private sector clients who want to reduce financial exposures associated with cleaning up environmentally impacted sites.

The 2021 USWAG CCR Workshop will be conducted through a series of webinars, once a month, from April 8 through August 5, 2021. The Workshop will focus on CCR Rule compliance, groundwater monitoring/corrective action, impoundment and landfill closure, and other key issues.

The Utility Solid Waste Activities Group (USWAG) is responsible for addressing solid and hazardous waste issues on behalf of the utility industry. USWAG was formed in 1978, and is a trade association of more than 130 utility operating companies, energy companies and industry associations, including the Edison Electric Institute (EEI), the National Rural Electric Cooperative Association (NRECA), the American Public Power Association (APPA), and the American Gas Association (AGA).

Abstracts

Remedial Planning Incorporating Geochemistry, Microbial Community Generics, and Fate and Transport Considerations at an Inactive CCR Landfill
Presenters: Rob Ferree, Ryan Fimmen, Geosyntec Consultants; Harold Register, Consumers Energy
Time: 1-3:30 p.m. Eastern on May 6, 2021
Consumers Energy completed construction of the final cover over an inactive Coal Combustion Residual (CCR) landfill located in Essexville, Michigan in December 2019. A robust program for postclosure care approved in a hydrogeological monitoring plan consists of monitoring at locations along the solid waste boundary and at downgradient, alternative monitoring points at the groundwater-surface water interface (GSI). As early as 1982, groundwater quality at the Site was determined to be impacted with a number of inorganic constituents, including arsenic. A detailed investigation of the landfill culminating in a groundwater characterization report outlined the nature and extent of elevated arsenic at the site and provided for a compliance monitoring program achieved through alternative monitoring points adapted into a groundwater mixing zone authorized by MDEQ on August 26, 2009 and reauthorized with minor modifications on December 23, 2015.

This presentation will focus on recent monitoring results, investigative methods evaluating geochemical conditions and microbial community in the sediment of the bay and the evaluation of appropriate remedial technologies. Traditional remedial technologies; such as pump and treat; passive reactive barriers, air sparging, or reactive capping, as a single solution may not be the most effective solution based on the dynamic nature of the surface water hydrology, groundwater flow, and the influence on fluctuating geochemical redox dynamics within the discharge area.

Undisturbed sediment cores were collected from the alternative monitoring points during the August 2020 water quality compliance monitoring event. Sediment samples for geochemical analyses were collected from four sampling locations aligned with four primary groundwater monitoring transects. These sediment cores were submitted for bulk chemical analyses and bench scale testing. The purpose of the bench test is two-fold: 1) evaluation of the mechanism and rate of the arsenic attenuation process and 2) determination that the capacity of sediment is sufficient to attenuate the mass of As within the plume and the stability of the immobilized arsenic is sufficient to resist re-mobilization.
Preliminary results from this study suggest a correlation between the change in geochemical redox conditions and arsenic solubility. Additional correlations noted from the microbial community suggest impacts to groundwater geochemistry, though it is unclear whether the community is alternating the groundwater chemistry or responding to environmental conditions that change groundwater geochemistry. The results of the groundwater monitoring, microbial community evaluation and geochemical studies have informed the evaluation of appropriate remedial approaches for the site. The study also provides a baseline for evaluating changes in water quality as these approaches are reviewed and implemented at the landfill.

Phytoremediation Using TreeWell® Technology
Presenter: Jim Linton, Geosyntec Consultants
Coauthor: Herwig Goldemund, Ph.D.
Time: 1-3:30 p.m. Eastern on August 5, 2021
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.

Problems with the Federal CCR Rule Groundwater Monitoring and Corrective Action Regulations and Work-Arounds
Presenters: Bob Glazier, Geosyntec Consultants
Time: 1-3:30 p.m. Eastern on August 5, 2021
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.

Watch the Videos

More Information

About the event: https://www.uswag.org/meetings/20210408CCR
About USWAG: https://www.uswag.org/
For consultation regarding solid waste management, contact Robert Ferree at This email address is being protected from spambots. You need JavaScript enabled to view it.
Learn more about Robert Ferree: https://www.geosyntec.com/people/robert-ferree
Learn more about Ryan Fimmen: https://geosyntec.com/people/ryan-fimmen
Learn more about Jim Linton: https://www.geosyntec.com/people/james-linton
Learn more about Bob Glazier: https://www.geosyntec.com/people/robert-glazier