Contaminated land and groundwater
12.—(1) In the event that contamination is found at any time when carrying out the authorised development that was not previously identified it must be reported in writing immediately to the relevant planning authority. An investigation and risk assessment must be completed in accordance with a scheme to assess the nature and extent of any contamination on the site, whether or not it originates on the site. The contents of the scheme are subject to the approval in writing of the relevant planning authority in consultation with Natural Resources Wales. The investigation and risk assessment must be undertaken by competent persons and a written report of the findings must be produced. The written report is subject to the approval in writing of the relevant planning authority in consultation with Natural Resources Wales.
(2) Where remediation is required, a detailed remediation scheme to bring the site to a condition suitable for the intended use must be prepared, and submitted for the written approval of the relevant planning authority in consultation with Natural Resources Wales.
(3) The approved remediation scheme must be carried out in accordance with its terms unless otherwise approved in writing by the relevant planning authority in consultation with Natural Resources Wales.
(4) Following completion of measures identified in the approved remediation scheme, a verification report that demonstrates the effectiveness of the remediation carried out must be produced, and approved in writing by the relevant planning authority in consultation with Natural Resources Wales.