Black Rock Quarry Control Point. All it does is levitate towards you and harm you that way. On the table next to the TV you will find access card 5.
There will be a forklift resting against a wall. Black Rock Quarry Second Hidden Location. Head down to the bottom to unlock the hidden location.
When youre ready keep heading towards the Black Rock Quarry.
Black Rock Quarry Furnace Chamber. On the table next to the TV you will find access card 5. Walk along the top of the quarry and use your levitation when needed to reach the open hangar doors on the northside. Black Rock Quarry Hidden Location.