Safety Safety Guidance

Comment on the approach for classifying sites into green, yellow or red

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Published September 2020. This version replaces ‘Guidance for safe intrusive investigation of contaminated land’ document, which was published in 2010.

Potential contamination hazards related to site investigation need to be subjected to a proper risk assessment. The British Drilling Association (BDA)’s publication 2008 ‘Guidance For Safe Intrusive Activities On Contaminated Or Potentially Contaminated Land’ provides an approach for classifying sites into green, yellow or red sites. The classification must be fully understood and not applied casually. Failure to fully appreciate the relationship between quantity and substance classification could be as dangerous as doing nothing or impose expensive non essential protection measures.