We have a similar situation - it's like ~ 10:30 AM everyday. I know it's what the toilet is for but even in six stall room the smell is like a septic tank exploded. It seems unreal that a single human can create such an intense odour. I wondered how it is that this guy couldn't do his dump at home but if the odour is this foul - maybe it's the reason he saves it for work.A guy at work takes a dump in our washroom everyday !
I did have a thought that maybe the boss was bringing in the smell to dramatically shorten the durations humans could survive in the bathroom thus getting more productivity from employees at their desk.