Many landowners, site operators and developers have a legal requirement to demonstrate that legacy land quality issues or ongoing site activities do not pollute controlled waters (e.g. rivers and aquifers) and the wider environment. Local authorities have a duty to identify land that has the potential to cause pollution of controlled waters and ensure that it is remediated to an appropriate standard.

ESI’s team of hydrogeologists and environmental consultants will steer a course through the technically complex issues to help:

	Provide a clear understanding of groundwater flow and transport to assist all stakeholders resolve issues regarding potential pollution of controlled waters
	Ensure that controlled waters issues do not delay site development
	Ensure that proposed developments will be protective of controlled waters
	Assist permitting processes
	Quantify environmental liabilities
	Provide flexibility for site-specific remediation objectives, including robust justification for no action where appropriate

Services: - Controlled Water and Ecological Risk Assessment

	Conceptual modelling to support risk assessment for controlled waters
	Identification of source-pathway-receptor linkages (potential pollutant linkages)
	Modelling approaches including the environment agency’s Remedial Targets Methodology, RBCA, RISC4 , CONSIM and RAM.
	Development of bespoke spreadsheet solutions for non-standard conceptual site models
	Development of remedial targets that are protective of controlled waters and the wider environment

Case Studies: - Controlled Water and Ecological Risk Assessment

	Habitats assessment for four closed landfills
	Four-year review of a Hydrogeological Risk Assessment for an active landfill
	Sub-Watertable Landfill (Regulation 15 Risk Assessment)

ESI recognises that risk assessment and management involve complex perceptions, policy issues and social factors as well as purely technical ones, and it is important to maintain close dialogue with all stakeholders in order to ensure a successful conclusion.

Please contact ESI (01743 276100 / email) for more information on controlled water and ecological risk assessment service.

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