The Toxic Trail quest in ARC Raiders sends you to the water intake below the Water Treatment Control building on Dam Battlegrounds. From there, head west into the swamp to a partly submerged barrel truck. Photograph the truck, then search its cab or door to find the saboteur clue and the Spaceport Warehouse Key.
Where the quest starts
Shani gives A Toxic Trail on Dam Battlegrounds. The quest has four objectives: return to the water intake below Water Treatment Control, search the swamp for the barrel’s origin, photograph the barrel truck, and search the truck for clues about the saboteur.
Step-by-step route to the barrel truck
- Reach the water intake. Go to the intake on the north side of Water Treatment Control, beside the swamp. It is the same general drain area tied to the earlier contaminated-barrel investigation. Simply reaching it advances the objective. GameSpot notes that you do not need to interact with the barrel again.
- Head west into the swamp. From the intake, move west and look for a partly submerged truck carrying barrels.
- Take the photo. Approach the truck and use the on-screen interaction prompt to photograph it. This completes the photo objective.
- Search the truck. Interact with the marked point by the truck’s cab or door. The search turns up the saboteur clue and the Spaceport Warehouse Key.
Do you need to extract?
No. GameSpot says extraction is not required to complete the quest. It does recommend keeping the Spaceport Warehouse Key, since it may help with later loot. A nearby Central Swamp Lift is an extraction option mentioned in walkthroughs. Using it is a practical choice after the quest steps, not an objective.
Quest facts at a glance
| Detail | What the sources report |
|---|---|
| Quest giver | Shani |
| Map | Dam Battlegrounds |
| Objectives | Visit the water intake; trace the barrel to the swamp; photograph the truck; search the truck for clues |
| Listed rewards | One Tactical Mk. 2, three Ziplines, three Pulse Mines, three Gas Mines (per the ARC Raiders Hub quest database) |
| Key item found | Spaceport Warehouse Key |
Keep the two keys separate
The Spaceport Warehouse Key you find in the truck is a different item from the Flushing Terminal Key. The Flushing Terminal Key is listed as a required item for The Stench of Corruption, the quest that follows this one. Do not treat them as the same key when you check your inventory.
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Where it sits in the questline
According to the ARC Raiders Hub quest database, Life of a Pharmacist comes before A Toxic Trail, and The Stench of Corruption comes after it.
In-game dialogue
A community wiki records Shani’s line when you accept the quest: “All right: head back to that barrel you found, and see if you can find any clues as to its origins.” This is fictional in-game dialogue as reproduced by a fan wiki. It is not a statement from an outside expert or an official document.
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What is and is not confirmed
The route above comes from GameSpot and PC Gamer walkthroughs, cross-checked against the ARC Raiders Hub quest database and a community wiki for the quest context. We did not locate official developer documentation for this quest. The walkthroughs we reviewed do not state a publication date or game version. If your map or markers do not match these steps, the quest may have changed in a later update, so check your quest log’s objective list against the four objectives above.
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