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BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text
Table 11.9 18-hour Annual Average Weekday Traffic (AAWT) Flows
Road 18-hr AAWT
Base + Committed
18-hr AAWT
Base + Committed +
Development
Hobson Way 2068 2139
Kiln Lane 3880 3951
A1173 14563 14623
A180 South of A1173 33791 33836
A180 North of A1173 / A180 Roundabout 24680 24695
11.106 Compared with the baseline traffic flows plus traffic expected as part of other committed
developments, the additional traffic generated by the proposed development will not be significant.
The resulting noise changes will be less than 1 dBA and the impacts will therefore be negligible.
Mitigation Measures
Construction
11.107 With appropriate good working practices and the production and implementation of the CEMP, it is
expected that there will be no significant noise and vibration impacts during the construction
phase of the development. Therefore no specific mitigation measures are deemed necessary.
Operation
11.108 Operational noise will be controlled as a result of the Project design (e.g. the requirements of BAT
and occupational health considerations), the implementation of good practice and regulation,
monitoring and control measures (e.g. through the EP and the EMS). It is expected that external
noise levels will not exceed 75 dB (LAeq,60min), that the worst-case internal noise level will be 90 dB
(LAeq,60min) and that the proposed building envelopes will achieve a minimum composite sound
insulation performance of 25 dB Rw (resulting in a noise level external to the buildings that will be
in the region 65 dB (LAeq,60min)).
11.109 On this basis, the operational noise and vibration resulting from the Dissolved Acetylene Project is
expected to have a negligible impact on human receptors and specific additional mitigation
measures are not proposed.
11.110 The noise and vibration impacts from road traffic generated by the development will be negligible
and no specific mitigation measures are required.
Residual Impact Assessment
11.111 Since no mitigation measures are proposed in relation to impacts associated with noise and
vibration the significance of impacts does not change from that described above.
5100935.404 Environmental Statement August 2011 204