The Remediation Technology Summit

February 26-28, 2019

Colorado Convention Center
Denver, CO

tomlinsonDerek Tomlinson
Senior Practitioner
GEI Consultants, Inc.

Derek Tomlinson is a senior practitioner in environmental engineering and contaminant hydrogeology, and Principal for his firm based in the Philadelphia area. He has more than 20 years of experience, specializing in development of strategies for managing non-aqueous phase liquids (NAPLs). His graduate training at the University of Waterloo focused on characterization and remediation of NAPLs using high-resolution characterization techniques to understand multi-phase fluid transport within the subsurface. His technical expertise includes development of innovative site characterization methods for refinement of robust conceptual site models, which he has used in proper design, implementation, and operation of a range of in situ remediation technologies within both porous media and fractured bedrock geologic settings. He has worked at various types of sites under USEPA CERCLA and RCRA programs, nationally in several state and regional led and voluntary programs, and internationally. He has provided expert witness and testimony in matters related to NAPL releases and related contamination.



Since 2007, ITRC has been a national leader in producing technical and regulatory guidance documents and training courses on light non-aqueous phase liquids (LNAPL).

These efforts have been instrumental in:

  • Advancing modern LNAPL site conceptual models;
  • Identifying specific LNAPL concerns and addressing them through the use of LNAPL saturation and composition-based remedial objectives;
  • Selecting established LNAPL remedial technologies to achieve remedial objectives; and
  • Implementing remedial technologies to achieve quantifiable goals and endpoints.

The LNAPL courses provided by ITRC have trained over 18,000 participants since 2009.

In 2016, the ITRC LNAPL team took on the task of developing a comprehensive web-based guidance that captures the fundamentals presented in the original documents, while also incorporating new science and enhanced understandings that have emerged since the original documents were published.

This workshop will provide an update on the team's efforts and will include focused tutorials on the LNAPL Conceptual Site Model, Natural Source Zone Depletion and relevant remedial technology selection case studies.