um - not quite sure I get what you are after... If looking at emissions whilst looking at the control of ignition (ie research and development) then exhaust venitillation, timings of trials etc. This, of course, would initially be based upon the manufacturer's drawings and basic emissions given and then appropriately assessed for the work you are doing. If looking at emissions in a warehouse, change for electric (if possible) or have ventillation/no-go areas If just generally in the workplace then that would depend on vehicle types, amount of vehicles, delivery times etc. Hope some of this helps...