I actually did find out exactly where the leak is before I took it to the dealer. Apparently the factory buys these tanks and then custom fits them into the RV. By this I mean they use thermo welding to fit a plumbing nipple into the bottom side of the tank depending on where the proper location is for that particular model.
I could see where the crack is in the nipple right at the point of contact with the side of the tank. By using a small mirror I could see exactly where the water was coming from. The membrane covering on the bottom of the RV was actually peeled back with a knife and looked like some sealant or epoxy had been applied at the factory. They pushed it out the door with the intention of letting the dealer (or buyer) fix it properly. There was no sign of this caused by damage on the road from the factory. The memebrane had precise smooth cuts to expose the area where the leak was.
