Simply modify your Facility Key in the radiation-machine near the watersample-test and then use the key in the closed locker situated in the room under the lab.
You can access in this room using the E-Card in the elevator in the "steam room".
I am a bit dead
PS: I have finally the REC:Veronica game for Ps2 (original copy 8-) ).
Somebody tells me REC:V sucks, but doesn't matter, I want to play it.