Ontario waste class 121 Caustic solutions carrying toxic metals.
- Free, no account
- Based on Ontario Regulation 347 and registration guidance
- Nothing is stored
Find a Canadian waste code
121, Heavy-metal alkaline waste.
Ontario inorganic wastes
Heavy-metal alkaline waste
Ontario group: alkaline solutions.
ComplyOnSiteIs Ontario 121 hazardous waste?
Not from the code alone. Ontario 121 describes the waste stream, not whether it is hazardous. Ontario decides that from the hazardous characterization or liquid-industrial status, and from the exclusions. The 3-digit class needs a primary characterization letter to form the waste number.
For subject waste, the generator enters the class-and-letter waste number in the waste details of the Ontario hazardous waste manifest. Ontario’s exclusions and shipment rules also apply.
What does Ontario 121 cover?
Alkaline heavy-metal liquids, sludges and residues. Examples are waste from metal finishing or plating baths, used alkaline solutions containing copper, zinc, tin or cadmium, and sludge from case hardening. Residue left after destroying cyanide and dewatered solids from metal or cyanide finishing also fit.
Is heavy-metal alkaline waste Ontario 121 or another class?
| Code | When it fits |
|---|---|
| 121 | The stream is alkaline heavy-metal liquids, sludges and residues. |
| 131 | The heavy-metal waste has been neutralized rather than remaining alkaline. |
When several characterizations apply, the registration flowchart picks the primary one. A 3-digit class doesn't replace the flowchart or the exclusions.
Which wastes take Ontario 121?
| Waste | When it’s 121 |
|---|---|
| Spent metal plating baths | Alkalinity and heavy-metal content |
| Cyanide solutions and residues | Alkalinity and heavy-metal content |
| Discarded material from metal finishing | Alkalinity and heavy-metal content |
| Spent plating-bath liquid | Alkalinity and heavy-metal content |
| Sludge from case-hardening work | Alkalinity and heavy-metal content |
| Used residue from cyanide destruction | Alkalinity and heavy-metal content |
| Dewatered solids from metal-finishing waste, cyanide-finishing waste or cyanide destruction | Alkalinity and heavy-metal content |