Contaminated Land Services
IF YOU ARE DEVELOPING AN EXISTING SITE OR REDEVELOPING A SITE IT IS LIKELY THAT AS PART OF YOUR PLANNING CONDITIONS THE LOCAL AUTHORITY WILL REQUIRE YOU TO UNDERTAKE A CONTAMINATED LAND ASSESSMENT TO ENSURE THAT THE SITE IS SUITABLE FOR ITS INTENDED USE.
Phase I – Desk Study
A Phase I investigation, alternately known as a Desk Study is prepared by REC’s team of qualified assessors using a range of data from The Environment Agency, Local Authority, commercially available data bases and historical maps combined where appropriate with a walk over survey. The report is used to assess any likely contaminant sources and risks associated with the sites current and historic land use to the proposed development, human health and local Environmental receptors.
REC’s Phase I Contaminated Land Assessments are simple to understand and provide the information required to outline whether a site is a low risk, or if further investigation is likely to be required by the Local Authority or Environment Agency to satisfy any potential Planning or Environmental issues.
Phase II – Intrusive Site Investigations
If the Phase I investigations show a likelihood of current or historical sources of contamination, or there is a likelihood of poor ground conditions a Phase II Intrusive Site Investigation will be required in order to further define the risks to any future development.
REC Phase II intrusive Site Investigations include the following:
- Review of all site information
- Consultation with the Local Authority Contaminated Land Officer and where required, Environment Agency, Coal Authority or other relevant parties
- Investigations using appropriate techniques (boreholes, trial pits, ground water and ground gas monitoring).
- Soil and Groundwater sampling and analysis
The results of the investigations will be reported in a factual and interpretive report in line with current industry guidelines which will identify and quantify any risks to either human health, groundwater or other Environmental receptors. The results will be used to provide recommendations as to the likely remedial measures or further investigations required in order for the site to meet with any planning requirements.
Phase III – Detailed Quantitative Risk Assessment (DQRA)
If the Phase II investigations show that a site is contaminated or that sensitive Environmental Receptors occur locally additional Investigations may be required, the results of which are used to undertake a site specific Detailed Quantitative Risk Assessment.
An REC DQRA assessment will include the following:
- Discussions with the Local Authority, Environment Agency or other relevant parties
- Targeted additional site investigations and sampling
- Computer Modelling with recognised Risk Assessment tools
The results of the DQRA are subsequently used to create a site-specific remediation strategy, which when agreed with the regulatory bodies will form a framework for the progression of the development.
It should be noted that a DQRA can also be used to demonstrate that the Generic Criteria used in a Phase II assessment are too stringent and a less onerous remediation strategy would be sufficient.