So I have a chance to pick up a 15 gal plastic conical with a stand for next to nothing. It says ace roto mold, us plastics on it. The only issue I have is I am not sure what it was previously used for. I know it was agricultural, its from my university. So how effectively can these be cleaned/decontaminated? If it were stainless I would have no problem, plastic scares me a bit.