Terrence Johnson has been working as an environmental scientist with the US EPA Office of Solid Waste and Emergency Response (OSWER) / Technology Innovation and Field Services Division (TIFSD) / Environmental Response Team (ERT) in Las Vegas, NV. Terrence is experienced in groundwater and multiphase flow, and contaminant transport modeling, and the fate, interactions, assessment and clean-up of LNAPLs and DNAPLs and their dissolved plumes in soils and groundwater. From 1995 to 1998, he worked with Weston Solutions as a Senior Groundwater Modeler in Edison, NJ; and from 1998 to 2002, with Lockheed Martin in the same capacity. From 1990 to 1995, Terrence worked as Senior Engineer with Environmental Systems and Technologies in Blacksburg, VA. Terrence joined the ITRC LNAPL Team 2008 as a team member, and has contributed to the development of the Natural Source Zone Depletion and Evaluating LNAPL Remediation Technologies Documents. He earned a bachelor’s degree in Soil Science from University of the West Indies, Trinidad in 1983; a masters degree in Soil Physics from, University of Guelph, Ontario, Canada in 1988; and doctoral degree in Environmental Sciences and Engineering from, Virginia Tech in Blacksburg, VA in 1992.