Justin is a Senior Engineer with Geosyntec Consultants and has 15 years of experience focused in the area of environmental engineering. Justin primarily serves clients within the Department of Defense (DoD), such as the US Air Force, the US Army Corps of Engineers, and the US Navy. His experience includes vapor intrusion assessment and mitigation, site assessment and characterization, remediation design, remedial process optimization, and environmental compliance.
Abstract of presentation: High Volume Sampling (HVS) is a method developed by Geosyntec to assess the potential for vapor intrusion in large buildings, rapidly, with greater confidence and at lower cost than traditional methods. HVS can provide information over a large area by purging and screening tens of thousands of liters of soil gas. This technique reduces the risk of failing to identify source areas between sample locations and leads to fewer investigative locations. This presentation includes a case study where HVS was used to understand source area geometry beneath a nearly 1 million square foot building. In addition, since developing HVS, Geosyntec has identified a number of different uses for the HVS technique, such as for getting pneumatic data for mitigation design, locating preferential pathways, and calculating a building-specific attenuation factor.
1255 Roberts Boulevard, Suite 200
Kennesaw, Georgia 30144
Day 1 – 9:00-9:45 – High Volume Sampling for Rapid Subsurface Investigation – Justin Knight, Geosyntec Consultants