I've heard about sludge like this. It's mostly a new problem related to fracking. TENORM, technologically enhanced naturally occurring radioactive material. I think mostly radium and uranium plus all the progeny in the decay chain. There are very few regulations written for this stuff. In my professional opinion, it should be spread in the landfill and burried.Man that sounds amazing, BKO.
So Richmond is home to tons of killer mustard gas and about 15min east of the mustard gas stockpile is a big ol landfill in Estill Co. Someone discovered 2,000 tons of radioactive sludge had been dumped in this landfill "that lies in the watershed of the Kentucky River pool from which Richmond Utilities draws it water".
Y'all pray for my county and neighboring county. Is the mustard gas don't get us, the toxic sludge will.
OTOH, maybe you could start a business selling the sludge to Iran.