Prads the subject is broad and the details you can give here are only briefs so its difficult for us to have a good picture of the scenario. But it will come down to risk assessment, risk assessment. Hence the reason that there are few responses to your post. The link below may give you some ideas, some of it is not relevant but it may give you a start. http://www.efsec.wa.gov/...%20Emergency%20Plans.pdf Steve