It is in a disposal vent in the Infirmary at the Research Station. To reach it, you need to use the pressure chamber to temporarily squash yourself to fit past the blocked door.
In the infirmary, take the hose from the reel at the right and go up toward the hub of the circular lab. When you reach the middle, go slightly right and come back down, and you will be in the maintenance area. Use the hose to flush the locator device from the vent, then exit to the left.
You do not have enough hose to go around the outside. If you run out, you can wind it up and try again.
She is hiding, trying to learn more about the alien artifacts before being forced to return to Earth. Drive to the Research station and you can recover the locator device that is tracking her. It is in the Infirmary.
Once you have flushed the Locator Device from the vent, exit through the BioWaste hatch to your left.
Lunar Colony
There are no guards at all on Lunar Colony. PASE doesn't have any money in the budget.
It is on the back of the lunar rover. To use it, click it and carry the hook to where you need it.
Lunar Colony became the 29th island released in Poptropica (not counting mini-quests) on September 6, 2012.
You turn them purple.
You get the keycard when you follow Salerno to the BioDome. As she escapes, she drops the card by the airlock. You will chase her in the rover to the Rock lab, but you also have to have purple eyes to fool the retina scan. You get them when you are at the Research Lab (upper right by the airlock). To find Salerno, you have to get the tracking device from the Infirmary.
It is attached to the back of the lunar rover. To use it, click it and carry the hook to where you need it.
There is a limited amount of hose. If you try to go around the outside, you will not get to the maintenance area. Instead, go up into the hub of the circular rooms. When you reach the middle, the rooms will rotate slightly. Go down and right to the maintenance area. The tracking device is in the vent at the right, and your exit is to the left.
its inside the infermary where maintnace is.
It is in the top right section of the lunar map, just up from the main Moon base.