It is wise to include this consideration in the planning stages of your project. The answer to your question, however, is a complex issue that will force you to evaluate the risk tolerances of the community. The processes in use at the refinery will have a role to play as well. For instance, a crude oil tank in someone's backyard is one thing, but a HF alkylation unit is quite another. An RMP would identify the explosion endpoints for the operation's storage units and this would definitely help the decision making. This can be an expensive proposition for something you are not required to do, however. For discussion purposes I'll throw out the following: Any refinery being built today by a major oil company would be rated at 500,000 barrels a day. This typically requires significant crude oil storage of say 15 million barrels. The plant would also require several side-by-side cracking and alkylation units, cokers, desulfurization plants, desalters, etc, along with expansive propane and butane storage. If one has the real estate to separate these units to prevent a single catastrophe from involving the next unit, a person might get by with a one mile buffer between the facility and the nearest priority residence such as schools, nursing homes, high occupancy offices, apartments, etc. I've seen single family residences built right up to the fence, but I don't recommend it. Besides the threat to the public there's the threat from the public in terms of tampering and theft. This sort of a buffer distance is negotiable and perhaps would start at a quarter-mile. This is far from a thorough elaboration on all the concerns but perhaps will get the discussion started. Cheers Jim -----Original Message----- From: SAFETY [mailto:[log in to unmask]] On Behalf Of lethanh khuong Sent: Wednesday, September 05, 2007 9:40 PM To: [log in to unmask] Subject: [SAFETY] Safety Zone for an oil Refinery! Dear Sirs and Madams, I have been involving the construction works of a Refinery Project in Viet nam as a safety officer. I have to set up a Safety Zone around the Refinery in order to prevent and protect any damages and loss caused by residents or other outside activities. Particularly, I need to give the figure for local authorities to provide us the land area surrounding Refinery for the minimum distance from our Refinery fence to the living residents and Buildings and others... So, in term of safety for the Zone around a Refinery. Do you have any experience to help me or have any standards or regulations metioned about it. Please kindly share your idea with me! It's so urgent to me, I'm looking for all your earliest responses! Thank you very much! Best Regard, Khuong Le Thanh HSE Engineer - Dzung Quat Refinery Project Quang Ngai City - Vietnam Email: [log in to unmask] --------------------------------- Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us.