I ended up taking the wall panneling off the wall to expose the holding tank vent hose. It was 3/4" ID white spa hose and it was indeed permiated. I removed it and replaced it with a high-density PVC pipe and a homemade carbon filter canister that I put together at Home Depot. Once install and everything put back in-place, everything worked as planned! I've been odor-free for over a week now and my neighbors and I are getting along better already. Thanks for the advice guys!