The Society of American Military Engineers (SAME) Denver Post and Philadelphia Post along with the US Environmental Protection Agency (EPA) are hosting a series of webinars based on talks given at recent Design and Construction Issues at Hazardous Waste Sites (DCHWS) Symposiums. The mission of the DCHWS symposiums is to facilitate an interactive engagement between professionals from government and the private sector related to relevant and topical issues affecting applications of engineering and science associated with cleaning up hazardous waste sites. The symposiums also serve as a platform to facilitate the exchange of information, encourage dialogue, share experiences, and build and enhance communication among design and construction professionals.

Fractures have enabled or enhanced remediation of soil, groundwater, and bedrock for decades. Advanced hydraulic fracturing methods can predictably deliver remediation amendments to low-permeability formations where amendment delivery via Darcy Flow is unreliable or ineffective. Here we present multiple case studies demonstrating the successful application of hydraulic fracturing to deliver remediation amendments to low permeability sites impacted with chlorinated solvents, which would otherwise require more expensive remedial approaches. These case studies include a range of in situ remediation approaches, with emphasis on chemical oxidation and chemical reduction. Implementation costs and performance monitoring results will be presented to demonstrate the potential for hydraulic fracturing to limit project costs and drive remediation outcomes during treatment of these challenging sites.

Presenters:

Chapman Ross, P.E., FRx, Inc. (cross@frx-inc.com or 617-821-0686)
Chapman Ross is the Director of Technology for FRx, Inc. and is based in Boston, Massachusetts. He has over 20 years of environmental industry experience focused on in situ remediation design and innovative technology development. Chapman is a technical expert in injection methods for in situ treatment, specializing in amendment delivery methods for low-permeability formations (e.g., hydraulic fracturing, direct injection, and high-pressure jetting). He has led the design of remediation projects utilizing chemical oxidation (e.g., permanganate, persulfate, peroxide, and ozone), chemical reduction with zero-valent iron, and enhanced bioremediation. Chapman earned a bachelor's degree in civil engineering and a master's degree in environmental engineering and science, both from Clemson University in South Carolina. Chapman is a certified Professional Engineer (Environmental) in Massachusetts.

Drew Baird, P.G., FRx Inc. (dbaird@frx-inc.com)
Drew Baird, PG has more than 20 years of experience in remediation design and implementation, project and team management, field support services, and environmental consulting. He is currently Senior Geologist at FRx, where he leads the company's business development efforts and provides technical support on soil and groundwater remediation projects to clients in the US and Canada. Prior to joining FRx, Drew was the East Region Manager at REGENESIS, where he was responsible for managing sales and technical support associated with the company's remediation products in the eastern US. He spent his first five years in the industry with a regional engineering firm in Greenville, South Carolina and is a registered Professional Geologist licensed in South Carolina. Drew resides in Charlotte.

Moderators:

Jean Balent, U.S. EPA Technology Innovation and Field Services Division (balent.jean@epa.gov or 202-566-0832)
Ms Balent is on the staff of the EPA's Technology Innovation and Field Services Division where she has worked to collect and disseminate hazardous waste remediation and characterization information since 2003. Ms Balent manages the Clean Up Information Network website and actively supports online communication and collaboration resources available to EPA. She formerly worked with the US Army Corps of Engineers Environmental Engineering Division in the Buffalo District. Ms Balent was also a member of the SUNY-Buffalo Groundwater Research Group where she constructed and tested large scale models of groundwater flow. Ms Balent has also conducted research relating to the Great Lakes, environmental remediation, and brownfields re-development. She holds a Bachelor's degree in environmental engineering from SUNY-Buffalo and a Master's degree in Information Technology from AIU.

Joshua Willard, U.S. EPA

Webinar Slides and References:

• Slide Presention for Chapman Ross, P.E. and Drew Baird, P.G. (7.43MB/PDF)

Webinar Slides and References:

• Slide Presention for Chapman Ross, P.E. and Drew Baird, P.G. (7.43MB/PDF)

Additional Resources:

• Fracturing Under Buildings
• Hydraulic Fracturing for Soil and Groundwater Remediation
• Injecting Potassium Permanganate
• Sites Where Injections Have Been Exposed and Explored by Excavation
• Use of Sand-Filled Lenses for Fluid Delivery - v2