The Bomb Shelter
You'll be able to go here once you agree to help Mrs. Buckner find her lover. Be careful not to step on the pools of glob. There is a room with a pair of boots here, be sure to wear them so you won't be affected by the toxic spills. Go find your man and get him out of there. As for the generator and the elevator, you're not ready to open them yet, so leave them for now.
Once you get out, go back the Klamath and talk to Mrs. Buckner for 100 bucks.