Smell Gas, No visible leak... 2000 Protege

[BobD]

I can smell gas with no visible signs of a leak. We've been smelling gas for some time and I've not seen any signs of a leak. Been away for a few days and left the car at home in the garage. When we got back I could smell gas. It's coming from the rear. I opened the hatch under seat. Everything looks dry. But I can smell gas in this area. I filled up the car today... right to the top and drove it around for a while. I'm smelling gas... but I'm not seeing it. I opened the hatch under the seat, started the car and sprayed with soapy water. I was hoping to see bubbles... but I'm not.
Engine light is not on.

Any thoughts?

[BobD]

Turns out the seam was leaking. I had no visible signs. I ended up taking it to a shop that pumped pressurized smoke into the tank... Smoke came out the seam.