Paragraph 23 Operational Noise
No part of Work Nos. 1, 2 or 3 shall come into operation until an operational noise assessment has been submitted to and approved in writing by the Local Planning Authority. The assessment shall—
be based on the final specification and layout of plant and equipment;
demonstrate compliance with the rating levels set out in paragraph (3); and
identify any mitigation measures required to achieve compliance.
The development shall be operated in accordance with the approved assessment and any mitigation measures therein, which shall be implemented prior to operation and maintained for the lifetime of the development.
The rating level (LAr) of noise from the operation of the authorised development shall not exceed—
40 dB LAr for any fifteen-minute period between 23:00 and 07:00; and
50 dB LAr for any one-hour period between 07:00 and 23:00, determined one metre free-field external to any window or door of any existing permanent residential premises using the definitions and methods described in BS4142:2014+A1:2019.
In the event that substantiated noise complaints are received following commencement of operation, the operator shall, upon request, submit a noise impact assessment to the Local Planning Authority for approval. The assessment shall—
Include attended measurements at or near the affected receptor(s);
Include comparison with predicted noise levels and BS4142 assessment;
Identify whether the operational noise is resulting in adverse impacts; and
Where necessary, include details of mitigation measures and a timetable for implementation.
Any approved mitigation shall be implemented in accordance with the agreed timetable and shall remain in place for the lifetime of the development.