To get this achievement, you will obviously need to find all of the notes. These notes are not difficult to find but they can be easy to pass up if you're not paying attention or if you don't know how many notes are at each location.
The Radio Station has five notes that you can find.
One is in a briefcase that is holding a door open under water.
Two are in rooms that you can explore while ascending the station.
Two are in the uppermost room with the whiteboard.