Begin by heading down the hallway on your way through flood storage. Go through the door at the end of the hall. At the intersection at the end you'll find a Pregnant on your left. Kill it and take the let hallway. Follow the turns and go through the door. There will be a crate to smash on the floor shortly after entering this room. Turn left and there will be another door on the wall you entered from. Turn right down this hallway toward Flood Storage 2, and there will be enemies and items waiting here for you. After killing the Necromorphs, take the hallway they were in to the right into Flood Storage 2. The room will enter lockdown and you will need to clear it of enemies.
Once the quarantine lifts, head to the utilities area through the door at the back of the room. Retrieve the Corer in the next room and head through the door. Move down the hallway and in the large room at the end you'll be faced with a Brute. Stasis it and use the Extractor on it from behind to end the fight quickly. Find the exit and follow the hallway to take the intersection right. Follow through the doors and you'll find the tram. When riding you'll go up top and fight off enemies as the tram is in motion.