1994 4 runner v6 fuel leak

[pharaohjoe]

http://imgur.com/V6Mmbew[/IMG]Girlfriend's car has a fuel leak. Fuel sprays whenever she attempts to turn the car on. Fuel is spraying to the right of the blue thing, not sure the source. Also found the yellow cap in the same area, I figure it's related. Any help on where the fuel leak is coming from and what i need to do to fix it would be appreciated.

http://imgur.com/V6Mmbew

http://imgur.com/ZWqRxQE