Black Rock Quarry Hidden Location. Levitate through the hole or launch a forklift to blow the wall. Again you will need to have completed the mission Old Growth to get mould sporepoison gas immunity for this hidden area.
However IF the game already told you that you got a hidden location and got an ability point for it then you pretty much got what you need from there. Black Rock Quarry Second Hidden Location At the Black Rock Quarry Entrance to the left above is a hole you can levitate up to. Hidden Location 8 Transit Corridor South 406 Look for an office window up along the wall.
In the Black Rock Quarry Entrance where the Astral monster is is a door in an above alcove you can enter.
Once youve done that head through the door to the Black. Black Rock Quarry Furnace Chamber. In the room just past the Black Quarry Entrance Control Point the one where all the monsters and Hiss attack you is a doorway located above everything to the left. Learn more on my Papagayo beaches article.