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Local Fuel – Shoreham Oil Terminal
Gasoline Ship Import – Layers of Protection Analysis
P & I Design Ltd
DOCUMENT NO: LF364002_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: E DATE: 30.07.15
Tel: + 44 (0)1642 617444
PAGE 18 OF 38
Fax: + 44 (0)1642 616447
www.pidesign.co.ukOFCE – thermal radiation damage
Again due to the location of the facility and lack of significant habitat (See Appendix 7) it
is not considered likely that thermal radiation damage would cause any significant threat to
the environment.
Fire – thermal radiation damage
Again as above (See Appendix 7) it is not considered likely that thermal radiation damage
would cause any significant threat to the environment.
Fire – harm from fuel / firewater run-off
In the event of domino effects causing a considerable escalation of the fire and damage to
bund walls following a flammable cloud explosion, it is possible that a limited release of
chemicals, Fuel, or fire-fighting water from the site could flow southward to enter the
harbour and possibly to enter the aquifer beneath the site to generate a long-term major
environmental release.
This is viewed as the worst case scenario from an
environmental viewpoint.
A risk tolerance criterion for a scenario based environmental assessment of 1 x 10
-6
/year is
considered as a reasonable frequency for a major environmental consequence.
The environmental consequence in respect of a release but a ‘non-ignition’ is however
considered to be low, as all of the tanks are all installed in very high impervious bunds
with adequate bund capacities and wall strength. Temporary pumping facilities could also
be made available to transfer liquids from bund to bund, if required.
Based upon the above, it is not however considered necessary to change the environmental
risk tolerance criteria of 1 x 10
-6
/year.
Environmental Scenarios to be studied
Scenario 3
: Overfill of gasoline tank during import from a ship leading to an explosion,
fire and a release to the Harbour and/or underground aquifer corresponding to a potential
Major Environmental Consequence.
Scenario 4:
Overfill of gasoline tank during import from a ship leading to release of
gasoline and a potential MATTE which would constitute a threat to the environment
The worst environmental case described above is thus presumed to result in a breach of the
bund wall, causing a surface run-off release to the harbour or into the ground outside the
site. This might constitute a temporary Major Environmental Consequence, subject to the
volume and components of the release. There is a negligible foreshore at this location,
hence any release would reach the water surface. It is conventionally considered that
gasoline would evaporate on the water surface before causing any permanent damage
although fire-fighting agents and other components may constitute a long-term concern in
the aquifer beneath the site.