20.
These study areas are shown on Figure 26.1 and 26.4.
National Planning Policy Framework 21.
The National Planning Policy Framework (NPPF) (published March 2012) has replaced Planning Policy Guidance (including PPG 24: Planning and Noise) as the means by noise is considered within the planning regime. The NPPF does not contain assessment criteria, instead providing a series of policies, giving local authorities the flexibility in meeting the needs of local communities.
22.
The use of various British Standard methodologies for noise assessments has been incorporated in this assessment:
Description and Measurement of Environmental Noise (BS7445: 2003) 23.
BS 7445 provides the framework within which environmental noise should be quantified and procedures to be followed. The standard also refers to BS EN 61672, which prescribes the equipment necessary for such measurements.
Code of Practice for Noise and Vibration Control on Construction and Open Sites - Part 1: Noise (BS 5228-1: 2009)
24.
Construction noise impacts arising from equipment, vehicular movements and processes related to the construction phase of a development are assessed by calculating the difference between the ambient noise level and the predicted construction noise added to the ambient noise level (LAeq,1hr). BS 5228 provides a methodology for calculating noise levels from construction plant.
25.
The assessment predicts noise emissions from various construction activities, which are then compared against threshold levels (based on background noise levels), at noise sensitive receptors. Noise levels generated by construction activities are deemed to be significant if the total noise (pre-construction ambient plus construction noise) exceeds the pre-construction ambient noise by 5dB or more, subject to lower cut-off values of 65dB LAeq 12hr during day time, 55dB LAeq 4hr in the evening and weekends and 45dB LAeq 8hr LAeq at night time from construction noise alone. Where daytime is considered to be Monday-Friday 07:00 - 19:00, Saturday 07:00 - 13:00, evening and weekend is considered to be Monday-Friday 19:00 - 23:00, Saturday 13:00 - 23:00, Sunday 07:00 - 23:00 and night-time is considered to be 23:00 - 07:00.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 26 Noise and Vibration Page 10
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