Page 270 - Alderney Regional Environmental Assessment of Renewable Energy: Environmental Report

Alderney Regional Environmental Assessment of Renewable Energy:
Environmental Report
sulphur oxide (SOx), which are all greenhouse gasses. The European Directive 2005/33/EC
has changed the fuel oil sulphur controls for ships in order to improve air quality near ports.
Under the Directive, the maximum allowable sulphur content of fuel oil used by ships at berth in
EU ports will be 0.1% by mass.
This assessment considers that vessel movements and associated emissions are likely to
increase temporarily during all phases of development. An increase in vessel movements is
likely to occur during operation as part of maintenance requirements, however construction and
decommissioning is considered to have the potential for more vessel movements. However, all
vessel movements associated with the Draft Plan are not considered to be significant enough
to result in a substantial change to the current air quality. Exposure to change is considered to
be low at worse during construction and decommissioning and negligible during operation
resulting in a minor adverse/insignificant impact.
7.7.2.2 Emissions from road traffic and non-road mobile machinery (NRMM)
The construction, operation and decommissioning of onshore substations and onshore wind
turbines is likely to result in infrequent and short-term increases in vehicle emissions,
specifically from increases in traffic for transporting people, parts and machinery (as discussed
in Section 7.9). However, all vehicle movements associated with the Draft Plan are not
considered to be substantial enough to result in a noticeable change in air quality. Exposure to
change is therefore considered negligible to low resulting in a minor adverse/insignificant
impact.
7.7.2.3 Generation of airborne dust
Increases in vehicles have the potential to generate infrequent and short-term dust emissions,
and additional vehicle emissions specifically from increases in traffic and plant during
construction, decommissioning and maintenance. The effect will be dependent on factors such
as the weather and surrounding environment. The effects have the potential to be more
substantial near sensitive receptors such as residential areas. However no substantial
increases in vehicles and associated airborne dust is anticipated and any exposure will be
temporary. Exposure to change is therefore considered to be negligible to low resulting in a
minor adverse/insignificant impact.
7.7.2.4 Mitigation
Given that none of the impacts on air quality are significantly adverse (i.e. moderate or major),
no mitigation measures are considered to be necessary.
7.7.2.5 Residual impact
Given that no mitigation measures are required for air quality, the residual impact has not been
assessed. The significance of potential impacts has been estimated and summarised in
Table 44.
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