Radioactive Waste in Probably Stolen comes from the Corporate Waste Manager's paid offer or a deteriorating Makeshift Reactor, and the documented disposal route is the Dumping Grounds. Pack a barrel into a suitable backpack, leave it on the ground there, and confirm your departure without it. Allow for a reported initial return event: the first discarded waste may come back, requiring another disposal trip.

Getting barrels from the Corporate Waste Manager
The Corporate Waste Manager offers an opportunity to receive money for accepting waste, but he is not a supplier you can schedule. ShowGamer describes him as a visitor who appears randomly early in a run and makes this offer only once. Look for the visitor wearing a gas mask and proposing payment for taking hazardous barrels, rather than expecting an ordinary merchandise delivery.
His earliest possible arrival depends on whether you played the introduction. According to ShowGamer, skipping it allows an appearance from Day 3, while playing through it moves that earliest opportunity to Day 11. Neither date promises a visit on that day, so a run reaching the relevant threshold does not establish that the offer has been missed if he has not appeared.
The reported deal pays 100 credits per barrel and lets you select one, three, or five barrels. Taking five can bring in 500 credits, provided the counter has enough available space to receive them. Payment follows the barrels actually placed: ShowGamer says choosing five when only three fit pays for those three, so inspect the counter before accepting the larger quantity.
How the Makeshift Reactor produces waste
The Makeshift Reactor starting perk provides another documented route to Radioactive Waste. ShowGamer says Dr. Jackson supplies an upgradeable Makeshift Micro Nuclear Reactor at the beginning of a run with this perk. Its benefit is independence from the station's electricity supply and protection against power outages, while its maintenance requirements create a separate responsibility for the shop.
Waste production is linked to the reactor's condition deteriorating, and the reactor requires maintenance and repairs. ShowGamer reports production approximately once every nine nights without upgrades, which is an estimate rather than a dependable countdown for every reactor condition or game build. Use that interval to anticipate possible waste handling, without assuming that upgrading guarantees a particular reduction or that a barrel must arrive on a specific night.
Make room and pack the waste before closing
Each barrel occupies a 3 × 4 inventory area according to ShowGamer, so transporting it requires enough room for the whole item. Light or heavy backpacks are supported by both the video guide and an early Playtest guide. ShowGamer additionally reports that the Kid's Backpack can work when it has sufficient space, but that smaller-backpack example is a third-party report rather than an officially verified requirement.
Before closing, find the barrel on your counter or in the Trash Can and drag it onto the backpack icon on the counter. If the backpack is full, rearrange its contents or remove other items before trying the transfer again. The Trash Can can serve as temporary storage away from the main inventory grid, so check it when collecting barrels for the outing rather than assuming anything placed there has been removed.
Dispose of a barrel at the Dumping Grounds
Close the store, select Leave the Store, and choose the backpack containing the waste. Then select the Dumping Grounds as your destination, following the route described by ShowGamer and supported by the player discussion and video guide. At the location, BACKPACK represents the inventory you brought, while GROUND is the area where you can leave items behind.
Drag the barrel from BACKPACK into the GROUND grid on the left, leaving room for its full 3 × 4 footprint. Select Return after placing it there, then confirm the warning that items left on the ground will be lost. The intended result depends on leaving the waste behind when you depart, so do not move it back into the backpack before confirming the return to your store.
Handle the first barrel's return before dumping the rest
A barrel coming back after disposal does not necessarily mean you used the wrong inventory grid. ShowGamer, a Steam player, and the video describe an initial return encounter; ShowGamer says a scavenger may visit the next day and leave the discarded barrel on the shop window ledge. The accounts differ on returned quantities, so do not assume that dumping several barrels together determines exactly how many will come back.
The video's suggested sequence is to discard a single barrel first, let the return encounter finish, and dispose of the remaining waste on later nights. ShowGamer and the video describe that encounter as happening once per run and report that disposal afterward should remove the waste permanently. Collect any returned barrel and pack it again, allowing for ShowGamer's reported limit of one Dumping Grounds trip per night rather than expecting an immediate repeat visit.
Why selling, cleaning, and waiting do not solve it
Radioactive Waste is listed with a base value of 0 credits and a Contraband status of No. Those labels do not make it ordinary stock: ShowGamer says customers will not buy it and it cannot go into a Vending Machine. The money in the waste-manager deal is payment for accepting barrels, rather than evidence that those barrels have a later resale market.
Leaving a barrel on the counter keeps it in the store the following day, and placing a loose barrel in the Trash Can is not a permanent disposal method. ShowGamer reports that paid Janitorial Service still left a loose barrel behind despite the cleaning report confirming garbage collection. The video also says insurance will not handle the waste, while a player's unsuccessful attempt to have it stolen does not establish guaranteed theft immunity.
Treat the crate method as a conditional workaround
A Steam player reports putting a barrel inside a crate and discarding the entire crate in the garbage can, while explicitly warning that this might be a bug. The video names empty supply or security crates and says the cleaning service removes the container, but using this method also sacrifices the crate. Treat it as a reported workaround that may fail in a different build; when planning the documented Dumping Grounds route, also allow for the video's report that a night outing delays opening and costs one customer.