[redmarion]

You hit the nuts on the flop. Sometimes, in Omaha, having the nut str8 on the flop is an "omen of doom." You have a faults since of security (relating back to hold'em play).

The [5d] on the turn means you still have a str8, but not the nuts. The [Qc] river neither adds nor detracts from the situation.

Being that this is limit, I think you have to pay-off the river. Many savey players will await the river and spring to life with their nut low. They'll bet and try to promote the nut-low to a scooper by stealing 1/2 the pot.

I do think the check-call is correct in your situation. I don't think you can auto-fold the second nut hand to a river bet. The purpose of the check on the river is to (a) induce a bluff, & (b) prevent a raise, in case your #2 str8 is beat.