Technical Strategy Leader for Remediation
Ryan Wymore is an associate with CDM Smith in Denver, CO, where he serves as a technical strategy leader focused on soil and groundwater remediation technologies. He has spent the last twenty years specializing in innovative remediation technologies, particularly in situ bioremediation, MNA, in situ thermal remediation, in situ chemical reduction, in situ biogeochemical transformation, and in situ chemical oxidation. As a seventeen-year member of the ITRC, he has won four awards, had membership on ten technical teams, and has served as an instructor for seminars on DNAPL characterization/remediation technologies, which have been delivered to thousands of trainees worldwide.
The Use of Innovative Characterization Technologies and Novel Amendment Injection Approaches at a Superfund Site
The Commerce Street Plume Superfund Site is contaminated with TCE and degradation products. The ROD-selected remedy features ISCO, ISB, and MNA. Results from our comprehensive high-resolution site characterization (HRSC) program showed that the hotspot designated for ISCO is no longer present; elimination of ISCO could represent a $3 million savings over the remedy life-cycle. The HRSC also revealed the presence of previously unidentified silt layers interbedded within what was thought to be a uniform sand unit where high TCE concentrations remain. ISB pilot testing is being performed incorporating shear thinning polymers to facilitate distribution across the interbedded lithologies. These polymers modify the amendment properties such that the viscosity decreases when it encounters lower permeability zones, thus enabling the amendment to more easily penetrate these layers. The result is a more uniform distribution across the interbedded sands and silts. Results of the HRSC program and ISB pilot testing will be presented.
Characterization and Remediation of Fractured Rock
The Commerce Street Plume Superfund Site is contaminated with TCE and degradation products. After decades of contaminated site characterization and remediation, our understanding of the distribution, fate, and transport of contamination, and remedial technologies have improved such that many sites are reaching remedial objectives. Many of the remaining sites that require remediation are more challenging with contamination is present in fractured and weathered bedrock. To help meet these challenges, the ITRC has created a Technical and Regulatory Guidance document on Characterization and Remediation of Fractured Bedrock, which was published in December 2017.
While ITRC is currently offering free two-hour webinars that summarize this newest ITRC guidance document, the proposed workshop will provide a more in-depth analysis of the guidance in an interactive classroom format. At its core, the ITRC fractured rock guidance document and this workshop will cover the fundamental differences between characterization and remediation at fractured rock sites versus unconsolidated sites. The workshop will discuss basic site characteristics such as geology/rock type, flow of groundwater in the rock matrix and in fractures, and fate and transport of contaminants, including the potential impact of matrix diffusion. In addition, the workshop will discuss planning and design of characterization programs, selection of appropriate tools (including an interactive demonstration of a tools matrix), and will provide a primer regarding remedy selection, design, implementation, and monitoring. Finally, case studies will be presented to illustrate the concepts presented in each section of the workshop.
Following presentation of these topics, this workshop will discuss how the ITRC fractured rock document incorporates principles from the 2015 ITRC Integrated Site Characterization document and also how the ITRC 2011 Integrated DNAPL Site Strategy can be used at fractured rock sites Overall, this workshop will show attendees how to use these ITRC resources to develop a fully integrated site strategy and apply robust decision making to improve characterization and remedy implementation at fractured rock sites.