MEDWAY COUNCIL COMAH OFF-SITE EMERGENCY PLAN ...

ABRIDGED - Medway Council Off-site Emergency Plan – National Grid Grain LNG Ltd.
In Stay In and Tune In, in line with COMAH regulations. This is considered to be
the safest option in most hazard scenarios.
13.3 Access to and egress from Grain village may be restricted if the A228/B2001
alongside the National Grid Grain LNG site is impassable, resulting in the
temporary displacement of people. This scenario is considered unlikely according
to hazard information provided by National Grid Grain LNG, for more than 4
hours. There are 5 hazard scenarios with off-site implications that have the
potential to result in a closure of the A228/B2001.
13.4 If the A228/B2001 was closed for a longer period due to a persistent hazard or
damage to its structure it may became necessary to consider the use of other
methods of access/egress. These options include the use of maritime transport
and the air ambulance. Response decisions will be made dependant on the
scale, nature and location of the incident.
13.5 Medway Council has procedures to manage nominated Emergency Assistance
Centres that can provide shelter for those people who, as the result of an
incident, are temporarily displaced and transport for those who may need
evacuation to a place of safety.
13.6 Several sites have been predesignated in this plan and Medway Council
Emergency Assistance Centre Guideline contains these and other site options,
dependent on the emergency scenario.
14. Vulnerable People
14.1 Medway Council, Kent NHS and other appropriate organisations will share key
information to assist in the pre-identification of vulnerable people using existing
datasets and protocols and, where appropriate, consider evacuating those
individuals/groups.
15. Environmental Impact (extract from National Grid Grain LNG’s COMAH
Safety Report)
15.1 The dangerous substances stored on site, which bring about the requirement for
a safety case report, are non-toxic. It is therefore considered that the main
potential major accident hazards to the environment, as defined by the COMAH
Regulations, are from fires. The two relevant hazards, from flammable gas clouds
or from sustained levels of thermal radiation, are discussed below. Explosions
are not considered here, as the consequences of explosions are unlikely to
extend beyond the site boundary.
15.2 Either a flammable gas cloud or thermal radiation could cause damage off-site.
However these scenarios are considered to be extremely unlikely, with the
highest frequency being that for a severe earthquake which would in itself cause
widespread devastation to the surrounding area. The hazard would depend on a
variety of factors including the release event, wind direction, weather conditions
and sometimes release orientation. The key potential accident hazards to the
environment are assessed in the following sections.
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