Ontario waste class 131 Treated water with toxic metals left in salt form.
- Free, no account
- Based on Ontario Regulation 347 and registration guidance
- Nothing is stored
Find a Canadian waste code
131, Neutralized heavy-metal waste.
Ontario inorganic wastes
Neutralized heavy-metal waste
Ontario group: aqueous salts.
ComplyOnSiteIs Ontario 131 hazardous waste?
Not from the code alone. Ontario 131 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 131 cover?
Neutralized heavy-metal liquids, sludges and residues. Examples are treatment sludge from metal finishing that contains cadmium, zinc, chromium, nickel or copper, wash water or sludge from a neutral salt bath, and lime sludge from treating metal-finishing waste. Solids dewatered from these operations also fit.
Is neutralized heavy-metal waste Ontario 131 or another class?
| Code | When it fits |
|---|---|
| 131 | The stream is neutralized heavy-metal liquids, sludges and residues. |
| 121 | The heavy-metal stream remains alkaline rather than being neutralized. |
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 131?
| Waste | When it’s 131 |
|---|---|
| Spent metal plating baths | Neutralization and heavy-metal content |
| Treatment sludge from metal finishing, with copper, nickel, chromium, zinc or cadmium | Neutralization and heavy-metal content |
| Sludge and wash liquid from neutral salt baths | Neutralization and heavy-metal content |
| Lime sludge produced while treating metal-finishing waste | Neutralization and heavy-metal content |