Dead Space 3 Walkthrough Part 53 – Side Missions: Disposal Services Site (Explosive Storage to Completion)
Head into Explosive Storage. Before you go down the stairs to the right, head across the room and over to the far door. To the left of it Issac will find S.C.A.F. Artifact 17. Likely this will give you the S.C.A.F. Circuit set if you have been following everything. Now head to the lower area and summon the cargo lift. This will set off the alarms and Issac has to fight his way through a number of waves. It is not a bad idea to head to the back left corner from the lift to take on at least the first part of the fight.
The first wave is easy enough as it is all Feeders. After that you have to face down a number of Exploders and Fodder. Those were the easy ones. After that things get a lot harder. Now Issac has to face down more Fodder but also Twitchers and Exploders as well. Remember to hit the Twitchers with Stasis to make it more conceivable to hit them and use whatever leftover explosive sacs are available to deal with the rest.
Once it is all dealt with head for the lift. Issac will find a massive storage chest. Inside it he will find a Compressor, Ammo Sweep, Conic Dispersal and Precision Tip Weapons Part, resources and a Spare Parts Box. Now head over to the right-hand side of the container and head up the stairs. Take the first door there to start on your way out. Be sure to stop at the Workbench that is to the left of the first door you go through. After that head to the lift on the opposite side and take it up to the Tram Station.
When Issac arrives here he will be attacked by a Twitcher and 4 Dark Fodders. Defeat them all. Be sure to head to the Tram itself after having completed everything here to find more things at the different Depots found across the planet's surface. After that just head on out through the door and start back toward Biology.