Date(s) - 08/31/2021
11:00 am - 12:30 pm
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11:00am – Presentation via Zoom
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Site Closure Tools in 2021
Contaminant assessment and remediation project work has matured at Sites across the country. Many Sites are now beyond the initial stages of Site characterization and risk assessment and are moving into later stages such as remedial alternative evaluations, design, remedial implementation, and post-closure monitoring. In fact, many Sites these days have progressed through active remediation and are now in a routine Operation and Monitoring (O&M) phase. However, this O&M phase typically involves on-going monitoring of residual contamination in soils and groundwater. As such, complete Site closure may not possible. In addition, federal or state regulatory agencies are very reluctant to approve closure requests (i.e., delisting or no further remediation certification) of these types of mature Sites.
Today, in 2021, additional tools and methods are available to address residual contamination at these mature remediation Sites compared to when CERCLA or RCRA rules and guidance were promulgated over 40 years ago. Also, in recent years there have been a number of changes in regulatory rules and guidance that allow risk-based closures for Sites with residual contamination. More importantly, there are now more Sites in the public record that have been completely closed, been delisted, or have received no further remediation certifications with residual contamination in place.
This presentation will provide an overview of regulatory strategies and technical approaches currently available to take a Site to complete closure. This presentation will also provide a high level benefit analysis of the liability and costs associated with the continuation of routine O&M remedies vs closure of the Site with residual impact. Finally, complete Site closure will have a positive effect on the ESG (Environmental, Social, and Governance) programs that many industries and organizations have recently implemented.
Jessica Yeager, P.E. – Principal Engineer, Geosyntec Consultants, Inc.
Jessica Yeager, PE, LSP is a principal environmental engineer with more than 11 years of experience in strategic, risk-based closures and complex remedial design for legacy and Brownfield redevelopment sites. She has designed remedial systems for high vacuum extraction, enhanced in-situ bioremediation, Liquid Boot® sub-slab vapor intrusion mitigation, air sparging, subslab depressurization, soil vapor extraction, groundwater pump and treat, dual-phase extraction, zero-valent iron injection, and chemical oxidation injection. Her clients have included Fortune 100 companies. She recently opened Geosyntec’s newest office in Overland Park, Kansas.
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