Updated, Practical Solutions to Achieve Risk-Based, Cost-Effective
Remediation

21-22 October

Programme

 

Understanding the Importance of the Conceptual Site Model (CSM) in Developing a Pragmatic, Achievable & Justifiable Remediation Strategy

  • Optimising the design of your site investigation and CSM to get more meaningful results on which to base remedial decisions:

    • identifying specific stakeholder and site end-use requirements from the outset to ensure you are collecting exactly the information that you need
    • ensuring your data is of the highest quality and fit-for-purpose

    • managing the trade-off between opinion vs quantifiable results

    • accounting for uncertainty and bias in the risk assessment

  • Effectively translating a detailed quantitative risk assessment (DQRA) into a robust and justifiable remediation strategy    

  • Determining how much remediation is enough:

    • defining “betterment”

    • striking a balance between conservatism and realism

    • justifying an acceptable level of risk to the regulator and other stakeholders

    • determining any risk-associated liabilities

  • Exploring how re-evaluating and revising remediation targets in line with site-specific criteria and Regulator consultation can result in different outcomes  

 

SuRF-UK’s 2020 guidance on Sustainability Assessment Process & Indicators for Remediation

  • Sustainable remediation, an introduction 

  • SuRF-UK guidance and use of sustainable remediation

  • 2020 guidance release

  • Process of sustainable remediation and its indicator categories

  • The SuRF-UK indicators in detail

  • Concluding remarks


Prof Paul Bardos, Director, r3 Environmental Technology Ltd & Joint Chair,  SuRF-UK Steering Group


 

Assessing the Impact of Climate Change on the Design & Effectiveness of Remediation Strategies

  • Incorporating future climate change projections into an environmental risk assessment - assessing the impact that effects such as increased rainfall, strong winds and prolonged dry spells could have on the movement of contaminants    

  • Exploring the consequences of this on the effectiveness of certain remediation processes (eg natural attenuation) 

  • Designing resilient and sustainable long-term remediation solutions to accommodate future changes in environmental and site conditions as a result of climate change

    • what impact will this have on currently used techniques? 

 

 

Exploring the Threat of Plastic Pollution in Soil 

  • Evaluating the extent of the current threat from plastics and micro-plastics, and in what form

  • To what extent are they currently present / analysed in samples tested in labs as part of site investigations?

  • Assessing the implications for contaminated land and groundwater investigation and remediation of increased plastic pollution, and likely proposed action

 

 

Case Study: Exploring the Use of Biomarkers to Achieve Cost-Effective Risk-Based Remediation

RSK was initially commissioned to provide emergency response to the accumulation of oil in the pumping wells of a deep underground car park. The site was immediately down gradient of a petrol filling station (PFS) which was initially assumed to be the source of the oil. Over time the nature of the recovered oil appeared to change in terms of its physical appearance and this was supported by qualitative chemical analysis. Further investigation of the basement car park revealed possible alternative sources for the oil, including the hydraulic lift system which was used to lower cars into the basement. In order to prove the origin of the oil in the pumping well, RSK undertook detailed quantitative biomarker analysis of samples collected from all possible sources. 

Biomarkers are effectively “molecular fossils” and are resistant to chemical changes through oil diagenesis and generation, they can therefore be used to uniquely identify oil sources.  The biomarker analysis confirmed that the PFS was not the source of the oil and that the hydraulic lift system was the most likely candidate. 

This work avoided significant remediation costs and environmental liabilities for the owners of the PFS.


Andy Lee, Technical Director - Global Division, RSK Group

 

SPOTLIGHT ON REMEDIATION TECHNOLOGIES - CASE STUDY EXAMPLES

 

This session will involve a series of case-study presentations illustrating the practical application and resulting costs & benefits of both established and emerging innovative water and soil remediation technologies 

 

Demonstrating the Long-Term (12+ years) Performance Monitoring of a Permeable Reactive Barrier using EHC®, Dealing with a Carbon Tetrachloride Plume in a High-Flow Aquifer with Both Biotic & Abiotic Degradation

Mike Summersgill, Technical Representative, UK & Ireland, PeroxyChem

 

 

 

Improving Stakeholder Communication & Collaboration in the Risk Assessment -Remediation - Development Process

  • Identifying the key areas of delay and concern for each party involved in the remediation and development process 

  • Exploring the role of NQMS, SQPs and industry initiatives in improving the quality of, and increasing confidence in, information and reports 

  • How can improvements be achieved within current resource and funding constraints? 

  • Strategies for improving early engagement, better communication and effective collaboration between local authorities, developers, remediation consultants & contractors, and other stakeholders to speed up the delivery of brownfield sites

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