Map of the area
[#1] Location: Secure Transit (Intensive Treatment)
The tape can be found in the southern section of this area and you can pick it up right after you've seen the elevator getting destroyed.
[#2] Location: Intensive Treatment Lobby (Intensive Treatment)
The tape is hidden inside the main structure and it can be found on one of the tables.
[#3] Location: Cell Block Transfer (Intensive Treatment)
Requirements: Cryptographic Sequencer, Cryptographic Range Amplifier
Once you've defeated Scarecrow explore the northern side of the right corridor. You should be able to find a barrier and you'll have to use the sequencer to hack into a terminal from a safe distance. Proceed to the booth and find the tape.
[#4] Location: Secure Transit (Intensive Treatment)
Watch a cut-scene showing an elevator (once you've already escape from Scarecrow's vision) and examine the desk to your left.
[#5] Location: Decontamination (Intensive Treatment)
Requirements: Cryptographic Sequencer
Break into one of the control panels (screenshot #1). Once it's safe head inside and inspect the area to your left to find the tape.
[#1] Secrets Map - Intensive Treatment
Location: Secure Transit (Intensive Treatment)
Once you've defeated Scarecrow proceed to the lowest level. A large group of inmates is stationed near the passageway leading to the Caves. Defeat them and once it's safe look around to find the map.
[#1] Location 1: Holding Cells (Intensive Treatment)
Once you've taken care of Joker's men (at the beginning of the game) head forward and check a small room to your left.