/diy/ - Do It Yourself

Hey, very cool thread. This is my first visit to /diy/ and I saw this and thought this is the perfect place to ask this, rather than /k/...

So I just bought a house, a foreclosure in florida, and then I found out it has a secret bunker hidden underneath it. Apparently it was a military munitions bunker, and then later a weed grow-space. Then it got sealed up, and covered over and the house went to foreclosure...

So very cool, and I was elated to find out about it. But when I opened it up and took a peek inside, I see that it is filled up with a bit of water, and a bunch of trash and debris. So now I'm pumping out the water, obviously the first step.

But I'm wondering what would really be the best way to go about cleaning it and making it nice? And what should I worry about, I saw someone say radon, and maybe black mold idk. It's supposed to be pretty huge, 2000 sq feet or more. Should I put some cleaning solution to kill off bacteria?

I was also thinking about cutting into one of the walls to put a stairway/second entrance. I was wondering if any of you guys know much about the construction of 50's era military bunkers, like if it would just be a rebar frame or if I might hit I-beams or if I need to worry much about structural collapse or anything crazy like that.

Thanks for any advice or answers!