Brownfield Redevelopment: Where History Matters
Scott Williams and Helen Boot
Brownfield sites are rarely defined by contamination alone. Historic land use, filling, legacy industrial activity and demolition often leave a record of disturbed and variable ground conditions that materially influence engineering behaviour. This presentation explores how structured desk study review and integrated conceptual site modelling can better identify both environmental and geotechnical risk at project commencement. Drawing on experience across brownfield developments on former rail yards, quarries and industrial complexes, the talk examines how disturbance history informs investigation strategy, ground characterisation, stiffness variability and settlement performance. It considers how early integration of environmental and geotechnical risk frameworks can reduce redesign, improve investigation targeting and strengthen the defensibility of engineering decisions on complex sites.
Following the investigation-focused discussion, the second half of the presentation will examine ground improvement techniques and methodologies suited to brownfield conditions. It will consider how appropriately selected improvement strategies can manage variability, enhance performance, reduce off-site disposal requirements and support more efficient construction and improved long-term asset performance.
About the speakers
Scott Williams Associate Geotechnical Engineer, Trilogy Consulting
Scott Williams is an Associate Geotechnical Engineer at Trilogy Consulting, with over a decade of experience delivering geotechnical and geo-environmental projects across the UK, Africa and Australia. As urban infill increasingly targets former and operational industrial land, brownfield redevelopment requires a clear understanding of historical land use, legacy disturbance and regulatory constraint from the outset.
Scott’s expertise includes detailed desk studies and preliminary risk assessments to establish site history, potential contamination sources and geotechnical constraints prior to intrusive works. He develops Conceptual Site Models that integrate environmental and mechanical risk within a single framework, ensuring that contamination, groundwater behaviour, fill variability and settlement performance are considered together rather than in isolation, ultimately informing intrusive investigations that address both geotechnical and environmental objectives.
His experience extends to foundation recommendations for shallow and piled systems on variable or impacted ground, preparation of earthworks specifications, site classifications and settlement assessment using PLAXIS 3D. He has also prepared and reviewed remediation strategies and materials management plans to ensure that foundation solutions remain aligned with contamination constraints, waste classification, and statutory requirements. On brownfield projects, achieving retention of suitable fill and reducing off-site disposal volumes requires environmental and geotechnical constraints to be resolved within a single, coherent ground model.
Helen Boot Business Development Lead, Menard Oceania
After Helen graduated from the University of Glasgow, she spent four years working Off-shore on Oil & Gas Rigs where she held roles ranging from Mud-logger to Measure-Whilst Drilling Engineer with Schlumberger. During this time, she gained extensive geotechnical experience across diverse international locations including Morocco, Mauritania, Norway, Scotland, Italy, and the Netherlands.
Transitioning into the construction industry, Helen has spent the past eight years applying her expertise to complex geotechnical challenges. At Golder Associates/WSP, she worked as a Construction Support Geotechnical Engineer across NSW and WA and most recently, with Menard Oceania, a ground improvement specialist, where she focused on reducing geotechnical risk for clients and projects throughout NSW, WA, and the ACT.
Helen has now embraced a new chapter in her career, stepping into a strategic role based in SA, continuing to drive innovation and excellence in geotechnical engineering.
Presentation recording
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