PiSigma
"the engineer"
It's actually extremely hard to cause an explosion in an refinery internally without explosives. Most refineries have tight security so good luck trying to smuggle in anything. Everyone knows everyone, so unless you got a long term mole, a spy will be caught.The list says exhaustive but is it really? I am just wondering if there are even more that we haven't noticed yet. China's not on the list but that's shocking given the visa free situation. I suspect there have been Chinese incidents that have not been reported.
All the piping and equipment are a mess, good luck finding what ever you might be looking for if you didnt spend a few years walking around the unit.
And everything is designed to be idiot proof with multiple levels of protection. Can't just close a valve and stuff blow up, we design that out.