View - North East Lincolnshire Council

BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text
Consultation
Body
EA (Annette
Hewitson,
Planning
Liaison
Officer)
Date of
Response
4 th August
2011
Table 5.3 Summary of EA Response to Draft FRA
Consultees Responses Comments ES Response
The EA considers that the details in the Draft FRA are not yet fully
compliant with Annex E of PPS25 for the following reasons:
1 The FRA does not yet demonstrate that surface water can be
satisfactorily managed on the site without increasing risks to third parties.
2 Additional information is required on the level to AOD to which the
refuge area will be set.
3 PPS 25 states that temporary and demountable defences are not
normally appropriate for new development and makes reference to the
importance of considering the impacts of water pressure hydrostatic
pressure when excluding flood waters. We would recommend this is
considered carefully in the design of the critical infrastructure element
(identified as the Electrical Switch Room). We would further
recommend options that seek to locate these above the predicted flood
level are considered more thoroughly.
Following review of the response further telephone
discussions were held with the EA 20,21 and agreement
was reached as follows:
It was agreed that drainage model outputs need to be
provided to the EA showing that the 1 in 100 year
storm with 30% allowance for climate change can be
contained within the site. The FRA has been updated
and model outputs are provided in Appendix 9G.
The EA confirmed that the safe refuge elevations of
6.61 mAOD and 8.88 mAOD are acceptable as they
are above the 1 in 200 year plus climate change sea
level. This information is now in Chapter 9 and the
FRA (Appendix 9A). In additional, Appendix 9F
provides a diagram showing the layout, elevation and
sections of the Generator Building (where the refuges
are located).
This issue was discussed further with the EA. BOC’s
stance is that it finds the residual risk of the flood
protection strategy for electrical infrastructure to be
acceptable. The EA confirmed that, for this type of
installation, it would register its concerns (but would
not formally object) on the issue.
5100935.404 Environmental Statement August 2011 69