Even with it in the yard they'll be lucky to get once-a-week service.
Even if the propane terminal gets switched a dozen times a day (you know, in the future, when a different railroad takes over), it's not like it's going to sound any different than the switching already taking place at the yard.
It's already the most industrial area in South Portland. As a South Portland resident I don't foresee any major opposition to this proposal. It's a permitted use for that zone, and any incidental odors aren't going to be any worse than what we already smell from the waste oil reclamation plant a few hundred feet away.
There probably isn't a more ideal location in all of Maine for such a facility.