They don’t require hazmat, ever noticed them being to job site, no placards, even the guy who pumps them out is not placarded. It’s like used engine oil, it’s messy and nasty but ok. The natural fertilizer.
Nobody else has, but I will - assume that you’re asking for lawsuit reasons? Forgive me if I’m wrong, I can’t see another reason for your query.
it’s just waste permits needed not hazmat, and tanker of over 1000 gallons which I doubt on a pick up
Just a suggestion as I'm not a doc but if at all possible, see a chiropractor. Somebody's insurance should pay for it.