All chemicals used in the construction of the authorised development must be selected from the List of Notified Chemicals approved for use by the offshore oil and gas industry under the Offshore Chemicals Regulations 2002, unless otherwise agreed by the MMO.

All protective coatings and paints must be suitable for use in the marine environment. Details of such coatings and paints and how they will be used must be submitted to the MMO as part of the construction method statement required under condition 9(1)(c).

The storage, handling, transport and use of fuels, lubricants, chemicals and other substances must be undertaken so as to prevent releases into the marine environment including bunding of 110 per cent of the total volume of all reservoirs and containers.

Where foundation drilling works are proposed, in the event that any system other than water based mud is proposed, the MMO’s written approval in relation to the proposed disposal of any arisings must be obtained before the drilling commences.

The undertaker must ensure that only inert material of natural origin, produced during construction drilling and seabed preparation for foundation works shall be disposed of within the Disposal Site.

The undertaker must inform the MMO of the location and quantities of inert material disposed of each month under this licence, by submission of a disposal return by 31st January each year for disposals occurring during the months July to December inclusive of the preceding year, and by 31st July each year for disposals occurring during the months January to June inclusive of that year.

The undertaker must notify the MMO within 48 hours of the completion of the final disposal of inert material at the Disposal Site.

The undertaker must ensure that any debris arising from the construction of the authorised development or temporary works placed below MHWS are removed on completion of the construction of the authorised development, unless otherwise agreed with the MMO.

The audit sheet must be maintained throughout the construction of the authorised development and any changes notified immediately in writing to the MMO. The audit sheet will be made available for inspection by the MMO within 12 hours of the undertaker’s receipt of a request made by the MMO.

In the event that the MMO becomes aware that any of the materials on the audit sheet cannot be accounted for it must require the undertaker in writing to carry out a side scan sonar survey to plot all obstructions across the relevant areas within the Order limits seaward of MHWS where construction works and related activities have been carried out. Local fishermen must be invited to send a representative to be present during the survey. Any new obstructions that the MMO reasonably concludes are associated with the authorised development must be removed, as directed by the MMO in writing, at the undertaker’s expense.