Paragraph 15 Control of noise during operational stageI1

The noise rating level for the standard operation of Work No. 15B (the onshore electrical substation) must not exceed—

Prior to commencement of operation of Work No. 15B, a noise investigation protocol must be submitted to and approved by the discharging authority. The protocol must set out a process for the investigation of cumulative operational noise from the proposed National Grid substation and the proposed North Falls substation as and when one or both is operational.

The determination of LAr,Tr must be in accordance with BS 4142:2014+A1:2019. The reference method set out in Annex D to BS 4142:2014+A1:2019 (or any successor thereto) must be used in the assessment of whether tonal penalties apply. The noise investigation protocol must identify—

Within 12 months of commencement of operation of Work No. 15B, the undertaker must carry out noise evaluations at the noise sensitive locations listed in sub-paragraphs (1)(a) and (1)(b) and submit the results to the F1discharging authority. If the noise rating levels are found to be exceeded, the undertaker must provide details of further noise monitoring and mitigation to be agreed in writing by the discharging authority.

For the purposes of this requirement “standard operation” means the ordinary operation of the substations excluding emergency operation and the testing of plant and equipment associated with emergency operation.