How to Evaluate Soil Vapor Extraction (SVE) Remedy Performance: Guidance and a Tool from the U.S. Department of Energy
Archived: Wednesday, October 26, 2022
Sponsored by: U.S. Department of Energy, Pacific Northwest National Laboratory | PNNL
Volatile organic compound (VOC) contamination in the vadose zone presents a potential threat to underlaying groundwater and/or to nearby structures through vapor intrusion. Such contamination is often addressed using soil vapor extraction (SVE), in which a vacuum is applied to the unsaturated zone to remove VOCs from the soil gas through a physical, mass transfer and extraction process. Typical of such processes, SVE can exhibit a diminishing rate of contaminant extraction over time. Current SVE performance assessment guidance provides a structured approach for assessing remediation of volatile contaminant sources in the vadose zone to determine whether the remedy should be terminated, optimized, supplemented, or transitioned to another technology. Quantification of the impacts of the remaining vadose zone source on groundwater and soil gas concentrations is a key element of this performance assessment. This seminar will discuss the U.S. Department of Energy's SVE performance assessment guidance and the associated Soil Vapor Extraction Endstate Tool (SVEET) software, that has recently been updated as part of an Environmental Security Technology Certification Program (ESTCP) project. Application of the guidance and tool will be illustrated using information from the ESTCP demonstration and from an evaluation of a SVE system at the DOE Hanford Site. Collectively, SVE performance assessments provide a defensible technical basis for making decisions about vadose zone remediation to provide a path that protects human health and the environment while making effective use of limited resources.
Christian Johnson, Pacific Northwest National Laboratory (cdjohnson@pnnl.gov)
Mr. Johnson is the Senior Development Engineer and Advisor for the RemPlex Center for Remediation of Complex Sites at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington. He has worked on environmental restoration and remediation technology research and development at PNNL since 1992. He has designed and implemented multiple ex situ and in situ bioremediation (ISB) systems for treatment of hydrocarbons and chlorinated solvents, is an author of the RT3D reactive transport code, is an author of guidance for performance and end state evaluation of pump-and-treat and soil vapor extraction, and has developed remediation decision support software such as the AIM Toolbox, SVEET, SOCRATES, and TRAC for the Department of Energy, the Department of Defense, and the Environmental Protection Agency.
Moderator:
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.
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Rehabilitation Act Notice for Reasonable Accommodation
It is EPA's policy to make reasonable accommodation to persons with disabilities wishing to participate in the agency's programs and activities, pursuant to the Rehabilitation Act of 1973, 29 U.S.C. 791. Any request for accommodation should be made to Cindy Frickle at 202-566-0927 or frickle.cynthia@epa.gov, preferably one week or more in advance of the webinar, so that EPA will have sufficient time to process the request. EPA would welcome specific recommendations from requestors specifying the nature or type of accommodation needed. EPA welcomes specific recommendations from requestors specifying the nature or type of accommodation needed. Please note that CLU-IN provides both alternate phone call-in options and closed captioning for all webinars, and requests for these specific accommodations are not necessary.
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