MEDWAY COUNCIL COMAH OFF-SITE EMERGENCY PLAN ...

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ABRIDGED - Medway Council Off-site Emergency Plan – National Grid Grain LNG Ltd. 5.5 The impact will depend upon the exposure of people and property to the hazard and their respective vulnerability to harm. http://www.kent.gov.uk/publications/community-and-living/kent-community-riskregister.htm 5.6 The risks are divided into 3 main categories under the Hazard Category of Fire or explosion at gas storage site. Hazard Sub Category Fire or explosion at a gas LPG or LNG terminal or flammable gas storage site. Fire or explosion at a gas terminal or involving a gas pipeline. Fire or explosion at a gas terminal as well as LPG, LNG and other gas onshore feedstock pipeline and flammable gas storage site. Risk Code (H1) (HL1) (HL25) Risk Rating MEDIUM MEDIUM MEDIUM June 2011 Page 16 of 52 Outcome Description Up to 3km around site causing up to 500 fatalities and up to 1500 casualties. Gas terminal event likely to be of short duration once feed limes are isolated; event at a storage site could last for days if the explosion damaged control equipment. Up to 3km around site, causing up to 10 fatalities and up to 100 casualties. Up to 1km around site, causing up to 50 fatalities and 150 casualties. (N.B. the listed outcome descriptions are taken from the National Risk Register and are national NOT and not related to any specific site). General Public Information Requirements 6.1 Under the COMAH Regulations the site operator (National Grid Grain LNG) is required to provide information to people within a defined area, who may be affected by a major accident at the site. This area is determined by the competent authority and is referred to as the public information zone (PIZ). Information needs to be provided, prior to any accident occurring, on: The activities undertaken at the site; • The dangerous substances which could give rise to a major accident, its potential effects on the population and the environment;
ABRIDGED - Medway Council Off-site Emergency Plan – National Grid Grain LNG Ltd. • How the population will be warned and kept informed in the event of a major accident; and • The actions that the population should take. 6.2 The limit of the public information zone (PIZ) as defined by the HSE includes the majority of residential premises in Grain Village. Also within the PIZ are: • BP Oil UK Ltd - top tier COMAH site • London Thamesport • Maritime Transport Ltd • Medway Power Station (SSE) – lower tier COMAH site • Grain Power Station (E-ON) – lower tier COMAH site • Foster Yeoman Ltd • National Grid Property Holdings • J Clubb Ltd 6.3 All these sites plus several other smaller businesses have information provided to them by National Grid Grain LNG, on the actions to take in the event of an emergency on the site. The village of Grain (population approximately 1,700 - 2001 Census) also falls almost entirely within the PIZ. National Grid LNG has issued a public information notice to all the residents in Grain Village as is required under COMAH regulations. The Public Information Zone leaflet issued by the National Grid Grain LNG site can be found on the following pages. 6.4 There are specific emergency procedures shared between National Grid Grain LNG and the other top COMAH site BP Oil UK opposite on the southern side of the A228 – these sites are designated a DOMINO sites because of their proximity. June 2011 Page 17 of 52
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MEDWAY COUNCIL COMAH OFF-SITE EMERGENCY PLAN ...

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