The presence of land contamination from current and past site activities has the potential to lead to significant impacts upon human health, water resources and the wider environment. The planning process, the Part 2A regime and acquisition/ownership of potentially contaminated land all require that unacceptable risks are dealt with appropriately.

Risk assessment provides a robust means to establish the significance of contamination identified by Phase I and Phase II investigations. Outputs from risk assessment models can be used in remedial design work to establish soil, water and vapour remedial targets for active intervention or the need for other risk management strategies such as isolation, source reduction and cover systems.

We specialise in technical human health, groundwater and ecological risk assessment and have developed a number of our own tools and models to supplement available UK guidance and models.

Regulatory Frameworks

Our risk assessments are completed under the umbrella CLR11, R&D66 & Part 2A frameworks, with human health assessments undertaken using the 2009 DEFRA/Agency SR3 CLEA methodologies & category 4 screening level guidance (C4SL), with controlled water assessments undertaken using the 2006 Environment Agency Remedial Target Methodology (RTM). We also utilise current UK reference human health assessment criteria (GAC, SGV, C4SL, S4UL) and additional guidance for vapour and gas risks drawn from UK CIRIA and CIEH publications.

Discussions with the regulators form a key part of the risk assessment process and we are experts in liaising with local authorities, the Environment Agency, Natural Resources Wales and SEPA to ensure that our risk assessments are appropriate for the site and acceptable to the regulators.

Our pragmatic and experienced approach to risk assessment, based on the many years of consulting, remediation contracting and regulation experience of our staff, ensures that our final remedial targets reflect the practicalities of developing, managing and remediating brownfield land.

We also undertake assessments for airborne vapours and dusts that could be released during remediation and construction works to address potential health risks to residents and workers on adjacent land. This allows generation of airborne vapour and dust thresholds for monitoring undertaken during site works.

To discuss your requirements, please contact contact Chris Dainton at the Derbyshire Office