There is a sewage pump located in -44m deep from the LED. The pump house structure is in 35m diameter and contains 4 electric pumps (3 duty + 1 standby) and sump dewatering pump located at -44m level from LED. Each sewage electric pump capacity is 985 l/s@59m head with motor rating 850 KW. The pump house contains only one exit stair enclosure, one elevator and the travel distance from the remote point to the exit stair door is more than 37m. Does single means of egress meets with the life safety code requirements? Which code references shall be considered to capture fire life safety requirements in this kind of structure? Thank you.