The site investigation procedure needs to identify the potential for contamination and identify possible areas that may require remedial works in order to make a site suitable for use.
The site investigation should be done in phases in order that resources are appropriately targetted.
The site investigation procedure involves specialist technical knowledge and it is essential that all phases of the site investigation procedure are conducted by competent and experienced people (who should hold recognised and appropriate qualifications). Where a geotechnical study and a contamination study are combined within one report the consultant should be able to demonstrate competency and has expertise to provide advice on both.
In the past we have received reports submitted on behalf of developers, which have not used a proper scientific or appropriate sampling strategy in order to assess risks from land contamination. It is essential that developers conduct their site investigations in accordance with current good practice.
Examples of current good practice can be found in the following documents:
Model Procedures for the Management of Land Contamination, Contaminated Land Report 11, Environment Agency 2004
BS 10175:2001 British Standard Institute (2001) Investigation of Potentially Contaminated Sites- Code of Practice, British Standard Institute. London.
Environment Agency (2001) Secondary Model Procedure for the Development of Appropriate Soil Sampling Strategies for Land Contamination. R&D Technical Report P5-066/TR. Water Research Centre, Swindon
Environment Agency (2000) Technical Aspects of Site Investigation (2 Vols.). Research and Development Technical Report P5-065/TR. Water Research Centre, Swindon
Environment Agency (2000) Guidance for the Safe Development of Housing on Land Affected by Contamination. The Stationary Office. London
The following documents detail local policies and guidance that should be followed in respect of:
Gas protection measures validation policy
Gas protection measures validation options