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BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text
Assessment Step Description
In general, impacts that are assessed to be major or moderate
are considered to result in significant effects; impacts assessed
as negligible are considered to result in insignificant effects; and
minor impacts may result in borderline significant insignificant
effects. This is discussed as relevant in each EIA chapter.
6 Mitigation measures Where, even after the application of ‘good practice’, a significant
adverse effect is identified, specific specialist mitigation measures
to minimise, reduce, offset or avoid such effects are proposed. In
general, mitigation measures are not proposed for beneficial
impacts or those of borderline significance insignificance.
7 Residual impacts Determination of the proposed development’s remaining
significance of effects after mitigation measures are implemented.
Where no mitigation measures are required or proposed the
residual impact is the same as that determined through step 5
above.
8 Recommendations A summary of any recommendations that have been identified
within the assessment process. Recommendations will differ from
mitigation measures in that it will not be assumed that these will
necessarily be adopted and hence they will not be included
accounted for in the assessment of residual impacts.
Recommendations are generally suggestions, or measures that
could be considered further.
9 Summary and
conclusions
A summary of the assessment and key conclusions.
Assessment of Decommissioning Phase
5.8 The acetylene facility is designed to operate for 25 years. If operation after this period is not
feasible, the plant will be required to close and be decommissioned. At this early stage in the
Project, no further information is available relating to the decommissioning phase. However, as a
guideline, it is anticipated that decommissioning activities will be similar to those that could occur
during the construction phase of the Project. At the end of the life of the BOC Dissolved Acetylene
Project, and prior to decommissioning, a detailed assessment will be undertaken to address
environmental impacts associated with decommissioning, thus, and as stated in the Scoping
Report decommissioning has not been discussed in any further detail in this ES.
Assessment of Combined and Cumulative Impacts
5.9 For impacts associated with the Dissolved Acetylene Project that are assessed to be of an
adverse nature, the EIA has considered, so far as is possible, the potential for combined and
cumulative impacts. The assessment of combined and cumulative impacts is an integral part of
the EIA process and ensures that all aspects of potential impacts from the proposed development
have been addressed to ensure minimum overall impact on communities and the natural
environment.
5.10 Combined impacts may occur when an operation (or operations) associated with the Dissolved
Acetylene Project gives rise to several types of impacts on a single receptor (e.g. the combination
of air quality, noise and traffic impacts at a particular residential property).
5100935.404 Environmental Statement August 2011 57