[homerjaysimpson]

standard play, you can play the turn in a few ways. He definitely has not a set, because he would repot the flop. So he may have two pair, a straightdraw or a flushdraw (normally that play indicates two pair). If he get on the turn the flush he would call or reraise you. Two Pair or the straightdraw would normally fold. The only reason to check the turn is if you believe he was no on the flushdraw and he will bluff the turn.