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BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text
18. Summary of Impact Assessment
Introduction
18.1 This Chapter provides a summary of the findings of EIA process for the Dissolved Acetylene
Project. The EIA has been carried out in accordance with the general methodology described in
Chapter 5, and the discipline specific methodologies described in each of the assessment
Chapters (Chapters 6 to 15). In addition, the EIA has taken account of the responses received in
the Scoping Opinion (see Appendix 5A) and other consultation (as described in Chapter 5 and
Chapters 6 to 15). Furthermore, the assessment process has considered the relevant planning
policies at national, regional and local levels (as discussed in Chapter 4 and summarised in
Appendix 4A).
18.2 The definitions of impact significance provided in the following Sections are given in the
assessment Chapters (Chapters 6 to 15). Unless stated otherwise:
� activities and impacts associated with the typical operation of the Dissolved Acetylene Project
are considered to be likely, continuous (whilst the plant is in operation) events with long-term
(permanent within the context of the project lifespan) effects;
� activities and impacts associated with abnormal operation of the Dissolved Acetylene Project
are assumed to be unlikely, infrequent (one-off events) with short-term temporary effects;
� activities and impacts associated with typical construction activities for the Dissolved
Acetylene Project are assumed to be likely, continuous (during typical construction hours)
events with short to medium term (permanent within the context of the construction period
(~9 months)) effects; and
� activities and impacts associated with ground preparation construction activities for the
Dissolved Acetylene Project are assumed to be likely and non-continuous events with
temporary short term effects.
18.3 In reading this Chapter it should be noted that the impact assessment has taken a ‘realistic’
approach in that it has assumed that the Dissolved Acetylene Project will be designed,
constructed and operated in accordance with relevant legislation, regulations, policies and
guidelines and that general ‘good practice’ will be employed. The assessment also takes into
consideration the fact that the Construction Contractor will produce a comprehensive CEMP for
(including a WMP and a CTMP), to be agreed with NELC, and that the operation of the project will
be controlled and managed through incorporation into the existing site’s EMS and through a new
EP. Whereas these environmental management and control measures may be considered as
forms of mitigation, they have been considered to be an integral part of the Dissolved Acetylene
Project proposals and, as such, only specific specialist mitigation measures are provided in the
following Sections. Mitigation measures have not been suggested for impacts with beneficial
effects, or those that are neutral and or negligible.
18.4 The remainder of the Chapter is divided into Sections for each of the environmental discipline
topic areas. A summary of the assessment of cumulative and in-combination effects is also
provided.
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