What are COMAH Sites?

[peachybabe]

Firstly, sorry to those who think this question should go somewhere else. I have looked for a more suitable area!

Now the question.

Can anyone explain to me in laymans terms what constitutes a Top Tier COMAH site, and a Lower Tier COMAH site. Tried Google-ing and the HSE site but couldn't find anything basic enough!

Thank you.

[ChuckFickens]

http://www.clevelande...anning.info/COMAH.htm

http://en.wikipedia.o...ards_Regulations_1999

[heathfield]

''Top Tiers'' and ''Lower Tiers'' are determined quite simply by the degree of hazard to people within a company's premises, or to others in the surrounding area, posed by substances used or stored by those businesses. See, for example,...

http://www.clevelande...anning.info/COMAH.htm

[ChuckFickens]

Snap :)

[heathfield]

Hi Chuck! (Thinks...I must type more quickly). ;-)

[peachybabe]

Thanks both. Must admit that I have actually already looked at both these sites, but I need something that sort of says " A Top tier COMAH Site is classed as such because.......and a lower tier is classed as such because.........."

You can see how basic I need it to be!!!