Mind you, this is said while standing at the landing pad for the dropship, which is at Hadley's Hope. The atmospheric generator is a few minutes drive/flight away.
And I'm not exactly against retconning Alien 3, but this movie asks me to believe that Hicks was taken off the Sulaco (and apparently replaced with a body double...? I don't know, haven't played the game myself but this raises even more questions) by Weyland-Yutani somehow, yet they left Ripley and Newt behind just so we can pretend Alien 3 happened exactly as we saw it. That just does not work for me.