@freemo I was the HazMat/HazWaste guy for our plant, before it recently shut down. We were moving an R&D centrifugal compressor test stand across the country in pieces. It had 2 20ft cooling towers. They split them in half to get ready for trucking. They hadn't done any maintenance on it, because the entire building was no access, accept to the R&D engineers and myself (safety inspections). So when they split them apart, they found that pigeons had taken them over some time ago. Me and the other hazmat guy (my dad) were asked to clean them, as it's hazardous, and would give us a bonus. Had to be done in 24hrs. We stayed all day and night to get it done. I have never seen so much shit and bird carcasses in my life. I talked to the local HazWaste company, they said we saved them $50k-75k they would have charged, and it would have taken them a week. Attached is the 55gal drum of waste, ended up taking up 2 of them. (also, I didn't plan on expansion, was in a hurry, and the shit popped the seals of the drums, and I had to transfer into 3 55gal drums)