Paragraph 33 I1

The undertaker shall not in the course of constructing a specified work or a protective work or otherwise in connection therewith do or permit anything which may result in the pollution of the waterway or the deposit of materials therein and shall take such steps as the engineer may reasonably require to avoid or make good any breach of its obligations under this paragraph.

The undertaker must repay to the Canal & River Trust all reasonable and proper fees, costs, charges and expense reasonably incurred by the Canal & River Trust in respect of the approval by the engineer of plans submitted by the undertaker and the supervision by the engineer of the construction of a specified work.