Memory Alpha
Memory Alpha
Environmental maintenance lab door label

The door label

Psych test

The damaged environmental maintenance lab

The environmental maintenance lab was a laboratory located in Starfleet facilities.

The Federation station on Relva VII had such a lab located in room 137. It was part of Wesley Crusher's psych test in 2364. (TNG: "Coming of Age")

The lab was given the full name "environmental maintenance laboratory" in the episode's script.