That board is super super drawy, so I'd imagine that most of villains range will be shoving that flop (strong draws, and strong hands). Once called, I'd say his range is pretty weak hands/weak draws, maybe like 9x, TT, AJ,AT or insider type hands that didn't wanna shove flop.

He prob wouldn't ship in these middle pair type hands on turn, so its very likely that a turn shove is often a float here I'd say. Sometimes we see a weak Q here like QT or QJ or something, but I don't think that often.