Completing A Toxic Trail in Arc Raiders sees you returning to a location from a previous quest, namely where you had to find a toxic barrel dumped in a drain for the Source of Contamination quest. This time, you're revisiting the same location and the same barrel, but there are a few additional steps that might trip you up.
Considering the last thing you want to be doing is searching the swamp while there are other potentially loot-hungry Raiders on the prowl, here's what you need to do. I'd recommend foregoing a free loadout for this one, since a key you might need later drops at the end, and as we know with the Armored Transports quest, losing keys required for missions is a pain.
