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Canadian waste code finder

Ontario waste class L Factory waste in liquid form, such as process water & sludge.

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  • Based on Ontario’s registration characterization flowchart
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L, Industrial waste in liquid form.

  • Ontario waste characterizations

    Industrial waste in liquid form

Use L when the Ontario flowchart makes this the primary characterization.

Liquid industrial waste, a characterization that follows only the waste's physical form, on Ontario's waste flowchart.

Where does the letter L go in an Ontario waste number?

After the 3-digit waste class. The letter L is the primary characterization in an Ontario waste number. The generator picks it by working through the whole registration flowchart, not by choosing the hazard that sounds closest to the waste’s name. If several characterizations apply, the first one the flowchart reaches is primary.

For a subject-waste shipment, enter the class-and-letter waste number in the waste details of the Ontario hazardous waste manifest. The generator registers the stream and certifies the shipment details. Streams under land-disposal-restriction notification must also name their secondary characterizations.

What does the Ontario letter L stand for?

The letter L marks industrial waste in liquid form when Ontario’s flowchart makes it primary. It pairs with the 3-digit class, which describes the material or process. The letter gives the characterization and the class gives the waste stream. Together they make the Ontario waste number.

When does waste get the Ontario letter L?

CodeWhen it fits
LThe finished Ontario characterization flowchart ends with L as the primary characterization.

Registration and manifest exclusions still apply. A characterization label doesn’t remove a specific exclusion, and it doesn’t put every shipment under the Registry.

Which codes sit beside Ontario L?

CodeWhat it is
AAcute hazardous chemical waste
BHazardous chemical waste
HHazardous industrial waste
IWaste with ignitable properties
CWaste with corrosive properties
RWaste with reactive properties
TLeachate-toxicity waste
UDe-characterized waste retaining untreated UHCs