Go into the previously toxic room and grab the keycard on the floor. Head out and round to the right, use the medical station if you need it. You can use the control panel to activate the claw and pick up barrels, drop them into the bin on the right and the toxic gas will clear, you’ll hear a message when it’s done. A couple of z-secs might show up especially if you stop to check his log and emails here. Go past the corridor on your left (there are more trites and a maggot down the corridor on your left and a door you can’t access yet at the end) and take the door on the right and grab Mark Lamia’s PDA. Head up the stairs and there will another maggot and a couple of trites. Follow the corridor round and a maggot will jump down. Exit the airlock and take out the z-secs and the imp, there are some pick ups next to the crate on your left.