i'm really not an EV calculator, but this looks fine to me. You have multiple ways to win the hand (don't forget the two fives in addition to the OESD ... catching a 5 is not likely to make opp a straight here)

I might even raise this smaller, for value. Advantage being that a play-back would indicate a higher pair than fives, and you just calculate the call based on the 10 outs.