Dear all, Is anyone aware of any guidance / standard / rule-of-thumb about the maximum travel distance to an emergency shower where hazardous chemicals are used. Thank you in advance, Michael

There's been a few threads on this, if you search and read through them I believe that the conclusion is that there's no set rule. What you need to do is figure out the floor area you want to cover, i.e. number of rooms v ammount of hazardous chemical in each. After that, factor in the number of people affected within the identified areas. Finally describe a (plausable) worst case scenario and determine from that how many you need. As with all assessments there's the conservative minimum versus the over engineered maximum number and through discussion with management/engineering/whoever a decision is arrived at based on requirement and cost that keeps everyone happy.