Where a Site Investigation has identified a significant contamination risk, either with regard to human health, or controlled waters, it may be necessary to undertake Remediation or Mitigation in order to deal with the problem and render the site suitable for it’s intended end use.
The solution will in most cases be unique to the contaminant profile and geological/ hydrological setting of the site.
A ‘Remediation Strategy’ (RemStrat) or ‘Remediation Method Statement’ is a document which considers all of the factors which govern the contamination Risk, and sets out potential options (termed an options appraisal) to mitigate the risk.
This may be as simple as breaking a contaminant pathway, for instance through the use of clean cover, hardstanding, or subsurface membranes. Where more severe contamination is identified, may involve active remediation, such as in situ/ex situ bio-treatment, stabilisation, or active carbon filtration.
More details on specific remediation techniques can be obtained on request. In all cases the most practicable, cost effective solution will be adopted, and integrated where possible into existing/proposed works.
An important stage of CLR11 is the subsequent verification of remedial works undertaken, which involves the collection and presentation of evidence that remedial works were undertaken as stated, and that a Site is suitable for intended use.
The deployment of appropriate remediation techniques and subsequent verification typically a requirement of planning, and in all cases will require regulatory liaison.
Next Stage – Verification