It is in the Research Lab north of the main moon base. Drive there, move the meteor with your winch, and enter. The pressure chamber is at the upper left of the main room. You can squash yourself flat (temporarily) to squeeze past the blocks into the Infirmary.
There is no electric saw on Lunar Colony. To enter the Infirmary at the Research Lab, climb to the top and use the pressure chamber to temporarily squash you down, then quickly slip past the boxes that are blocking the door. The exit from the Infirmary is in the maintenance area.
To enter the blocked Infirmary, use the pressure chamber device (upper center) to temporarily squash yourself down, and you can fit under the door. (You will not be exiting that way.)
Lunar Colony
There are no guards at all on Lunar Colony. PASE doesn't have any money in the budget.
Lunar Colony became the 29th island released in Poptropica (not counting mini-quests) on September 6, 2012.
It is on the back of the lunar rover. To use it, click it and carry the hook to where you need it.
You can't move the crates from the infirmary entrance -- you have to slip under them to the door. Use the pressure chamber (upper center) to squash yourself flat, then quickly run under the doorway. You won't have to come out that way, because there is an exit in the maintenance area.
You turn them purple.
It is attached to the back of the lunar rover. To use it, click it and carry the hook to where you need it.
its inside the infermary where maintnace is.
Once you leave the main moon base, your first stop is the Research Station in the upper right of the map. You can use the winch to move the meteor from the airlock. You will have to use the pressure chamber to make yourself flat and enter the Infirmary, where you will find the locator device for Cdr. Salerno.
It is in the top right section of the lunar map, just up from the main Moon base.