Phase III Validation of Remediation

Where the Phase II report identifies pollution linkages, it recommends measures to make the site suitable for its proposed use. These may include garden cover systems, ground gas protection measures or an appropriate specification for water mains.

The detailed method of remediation is often not available when the Phase II report is prepared. Once that report is accepted, the remediation methodology should be agreed before the site works begin.

The implementation plan provides a detailed statement of how the remediation will be carried out. It includes technical details of the materials to be used, such as membranes and sources of cover material, for review by the regulatory body.

The plan also sets out the proposed sampling and monitoring visits, so the evidence needed for validation is considered before the work starts.

Where materials are imported to the site, for example to form a garden cover system, chemical testing may be required. The source and volume of the material influence the testing regime.

The Phase IIIa implementation plan explains and justifies the sampling regime and the scope of laboratory analysis.

The completion report brings together data and records demonstrating the satisfactory completion of the agreed remedial proposals.

It supports the final review of the contaminated land planning condition. As the evidence depends on completed works, this stage is usually reached towards the end of the development.

Agree the remediation method and validation requirements before works begin, so the right records can be collected throughout the project.