Some of the rodent diseases are pretty bad. I can't recall the name of the one that was a concern at the Del Water Gap.
We had to put everyone going into the buildings that had high rodent populations, past or present, into suits and N95 masks. Masks were smoke tested for fit.
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These buildings were barely 3 seasons, and the crawl spaces underneath IMO should have been open and left open.
That's one way to cut down on the nesting bugs and critters - especially overwinter.
I lost that arguement.