O’Sullivan Macfarlane specialise in the assessment of brownfield and contaminated land. Our fully equipped in-house team of locally based contaminated land specialists can provide all aspects of contaminated and brownfield land assessment to clients in Northern Ireland, UK and Republic of Ireland. All site investigations are carried out in line with government guidance CLR11 (Model procedures for the management of land contamination).
Contaminated Land Services include;
• Environmental Due-Diligence Assessments;
• Phase 1 Preliminary Risk Assessments (PRA);
• Intrusive Site Assessments;
• Phase 2 Generic Quantitative Risk Assessments (GQRA);
• Phase 3 Detailed Quantitative Risk Assessments (DQRA);
• Ground Gas Risk Assessments;
• Remedial Options Appraisals;
• Remediation Strategies and Remedial Supervision;
• Validation / Verification Supervision and Reporting;
• Foundation Works Risk Assessment / Piling Risk Assessment
• Waste Classification Assessments.
With a combined experience of over 15 years, drawing on experience from both the private sector and the Northern Ireland Environment Agency, we have significant expertise in the field of contaminated land and brownfield development. All our work is provided in-house using locally based contaminated land specialists. Our staff are members of the Institute of Environmental Science (IES) and the Chartered Institute of Waste Management (CIWM).
Background to Contaminated Land Assessment
The Model Procedures for the Management of Land Contamination (CLR11) has been developed to provide the technical framework for applying a risk management process when dealing with land affected by contamination. The process involves identifying, making decisions on, and taking appropriate action to deal with, land contamination in a way that is consistent with government policies and legislation within the UK.
CLR11 indicates that the assessment of land for contamination should always start with a Phase 1 Preliminary Risk Assessment (PRA), with the following objectives;
- Define the objectives of the assessment;
- Collect basic information about the site;
- Decide if further assessment of the site is required.
If the Phase 1 PRA identifies unacceptable human health and / or environmental risk, then the site will have to be further investigated by way of an intrusive investigation (soil, groundwater, ground gas and surface water) and the information obtained from this assessed (Quantitative Risk Assessment). If this further assessment indicates unacceptable pollutant linkages, a Remediation Strategy is developed to break the identified linkages. In order to confirm the Remediation Strategy has been correctly incorporated into the final development, a Remedial Validation Report is produced.