Jetty Non Technical Summary - EDF Hinkley Point

Mitigation
7.4.10 The main mitigation to be implemented would include good construction practice and
management tools for minimising nuisance from noise and vibration. For example,
British Standard BS 5228: Part 1:2009 gives detailed advice on standard good
construction practice for minimising nuisance from construction noise. This includes the
use of electrical items of plant instead of diesel plant in especially sensitive locations,
keeping internal haul roads well maintained and avoiding steep gradients where possible,
avoiding unnecessary revving of engines and switching of equipment when it is not in
use.
7.4.11 Measures to be incorporated would be included within the EMMP for the project. As
appropriate, these would include:
• use of white-noise spectrum reversing alarms and/or in-cab radar systems;
• soft-start piling operations; and
• prior notice for noisy short-term onshore activities that are expected to exceed the
respective construction noise limit (48 hours in advance).
7.4.12 A formal system would be put in place which identifies the roles and responsibilities of
site staff regarding the noise complaint action procedure. Site logs would be maintained,
detailing all complaints received relating to noise nuisance impacts, and the
corresponding response made to each complainant.
7.4.13 The assessment of potential hourly road traffic noise impacts includes an assumed 2.24
car share rate. This would be managed by through a Travel Plan and minimising the
number of car parking spaces on site.
Residual Impacts
7.4.14 Table 4 presents a summary of the significant noise impacts that would remain after the
measures discussed above have been put into practice. It should be noted that
measures built into the jetty development’s design to minimise adverse impacts (e.g. best
practice) is not considered to be mitigation.
Table 4 Summary of Significant Impacts on Noise and Vibration
Description of Impact Impact Mitigation Measure Residual Impact
Construction Phase
Onshore construction
works
Moderate adverse
(Benhole Lane
PRoW)
Implementation of
best practice
measures
Moderate adverse
Receptors are
transient
Dismantling and Restoration Phase
Onshore construction
works
Minor to major
adverse (public
footpaths and other
outdoor amenities)
Implementation of
best practice
measures
Negligible to
moderate adverse
Hinkley Point C Preliminary Works
Non Technical Summary
Temporary Jetty Development 26 November 2010