Black Rock Processing Control Bridge. First head to Central Maintenance using the sector elevator. First head for maintenance and then follow the signs to the Black Rock Processing area.

Continue to Atlas Chamber the big door will open right in front of you. Its time to explore Black Rock Processing head through the door on the right-hand side of the room and keep. Where is Black Rock Processing in Control.
From the Atlas Chamber head toward Black Rock Processing and hang a right into the corridor behind the Clearance Level 5 door and then Levitate through a hole in the.
From the Atlas Chamber head toward Black Rock Processing and hang a right into the corridor behind the Clearance Level 5 door and then Levitate through a hole in the. Continue towards Black Rock Processing 2 Jump back over the non-spinning turbines and head downstairs to where you fought the Hiss. Open the door to the Black Pyramid room and pull the light cord three times. Head back down to the walkway by following the signs for Black Rock Processing then cross the bridge go up the stairs to the right and drop down into the office.