The effective investigation and remediation of contaminated land

Contaminated land, following a spill, or for businesses looking to develop a site that’s already polluted, poses a risk to the environment and can damage reputations. The correct procedure is essential to reduce environmental impact and minimise liabilities. Guidance provided by Defra and the Environment Agency, which we adhere to, will ensure best practice when it comes to contaminated land investigation and remediation.

Step 1: Spill response
In the event of a spill, a quick reaction is essential. Adler and Allan provides emergency spill response, 24/7, 365 days a year. How quickly and efficiently a spill is initially dealt with will have a huge impact on its long-term effect and the extent to which a site is contaminated. On sites with a high spill risk, such as those which store or transport fuel, spill kits should be available, providing an immediate line of defence, prior to external support.

Step 2: Risk Assessments (Preliminary, qualitative and quantative)
Preliminary Risk Assessments (PRA) are usually undertaken during, or immediately following, the contaminated land response phase. These risk assessments require collection of web-based data relating to environmental sensitivity and the construction of a Conceptual Site Model, forming the basis of the qualitative risk assessment.

The PRA will determine how serious the risks are, with unacceptable risks requiring further action, such as soil or groundwater investigation. From the findings of the risks assessments, an options appraisal will be created.

Step 3: Options appraisal and plan of action
Following the risk assessments, an options appraisal and plan of action will be agreed with screening and detailed evaluation of groundwater and/or soil remediation options prior to finalising selection of the most appropriate techniques.

Step 4: Contaminated land remediation
We employ a number of techniques to remediate land, in some instances back to pre-spill levels. These techniques include:

Physical remediation techniques: excavation and disposal of contaminated soils in operational environments. We can install free product recovery trenches, employ active and passive methods of product recovery from groundwater and stabilise/solidify pollutants for treatment of soil contamination.

Biological remediation techniques: ex-situ soil remediation and in-situ groundwater remediation.

Chemical remediation: in-situ chemical oxidation for treatment of groundwater and ex-situ chemical oxidation for soil remediation.

Adler and Allan is an approved Environment Agency supplier and can also represent clients in meetings with the Environment Agency and Local Authorities.

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Testimonials


Swift response and excellent team effort.
Dartmouth Harbour
Thanks for the excellent response, communication, clean up, and manner of teams.
Scottish Power
Just a quick email to thank yourself and all the lads that contributed to the spill…a job well done.
Costain