Guest Webinar: Introducing the Concawe LNAPL toolbox

Language: English
Presenters: Richard Gill (Concawe), Markus Hjort (Concawe) and Gareth Leonard (REGENESIS)

In this webinar, our guest speakers Richard Gill, Chair of the Soil and Groundwater taskforce at Concawe and Markus Hjort, Science Associate for Water, Soil and Waste for Concawe, introduce the Concawe LNAPL Toolbox.

Understanding the behaviour of Light Non-Aqueous Phase Liquid (LNAPL) in the subsurface is complex and Concawe have compiled a unique collection of useful tools, calculators, data, and resources to help scientists and engineers better understand how to manage LNAPL at their sites. The web-based toolbox uses a three-tiered approach that provides access to over 20 different LNAPL tools (key infographics, nomographs, calculators, mobility models, videos, checklists, and other formats) with different levels of complexity and time requirements. These tools allow better understand of key questions such as:

1. How much LNAPL is present?
2. How far will the LNAPL migrate?
3. How long will the LNAPL persist?
4. How will LNAPL risk change over time?
5. Will LNAPL recovery be effective?
6. How can one estimate Natural Source Zone Depletion (NSZD)?

The LNAPL Toolbox therefore allows better understanding of the LNAPL onsite and informs the required response.

Gareth Leonard, Managing Director of REGENESIS in Europe, then briefly discusses sites on which LNAPL may be managed by NSZD or active recovery and the residual dissolved phase contamination is driving a downgradient risk. Here a PetroFix permeable reactive barrier can be used to sorb and biologically degrade the migrating plume. The mechanism of treatment is discussed, and case studies used to exemplify the remedial approach.

Presented by:

Richard Gill
Chair of the Soil and Groundwater taskforce, Concawe
Environment and Carbon Capability Advisor, Shell Global Solutions
Richard Gill is the Chair of the Soil and Groundwater taskforce at Concawe and an Environment and Carbon Capability Advisor at Shell Global Solutions. Richard has been Chair since 2022 and an active contributor to the taskforce since 2020. For the majority of his career in Shell he has provided technical soil and groundwater support to a range of businesses around the world. Prior to Shell, Richard completed a PhD focused on the innovative groundwater remediation technology electrokinetic-enhanced bioremediation.

Markus Hjort
Science Associate for Water, Soil and Waste, Concawe
Markus Hjort joined Concawe in 2017 and has since then been working as a Science Associate for Water, Soil and Waste. In Concawe, Markus is leading and coordinating research projects in the area of Water, Soil and Waste relevant to the European Fuel Manufacturing Industry. Prior to joining Concawe, Markus worked for AnoxKaldnes/ Veolia Water Technologies as an R&D Engineer wastewater treatment for 5 years. Markus has an MSc degree in bioprocess engineering from Lund University (Sweden), which includes one year studies at TU Delft (Netherlands).

Gareth Leonard
Managing Director, REGENESIS Europe
Gareth is the Managing Director of REGENESIS in Europe. He leads a dedicated team of in situ remediation specialists to provide solutions for the contaminated land industry. Gareth has over 20 years contaminated land experience, having provided successful remediation designs and implementation for over a thousand projects across Europe, the Middle East and Africa.