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Ontario waste class E123 Mosquito larvicide, limited to 28 mg/L.

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  • Based on Ontario Regulation 347, Schedule 4
  • Nothing is stored

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E123, Temephos.

  • Ontario leachate quality criteria

    Temephos

Ontario TCLP limit: 28 mg/L for Temephos.

Ontario leachate limit of 28 mg/L for temephos, an organophosphate larvicide used for mosquito control.

Is Ontario E123 hazardous waste?

Yes, when the leachate limit is met. This Ontario class is hazardous when the TCLP extract holds temephos at 28 mg/L or more. A result exactly at the limit counts, subject to the regulation’s exclusions. A concentration in the original bulk waste is a different measure.

For a shipment of this waste, the generator records the 3-digit class and primary characterization in the waste-number details of the Ontario hazardous waste manifest. The hazardous-waste number names the constituent for the assessment. It doesn't replace the class-and-letter waste number. Land-disposal treatment standards are assessed separately.

What does Ontario E123 cover?

This class covers temephos in the extract from the Toxicity Characteristic Leaching Procedure (TCLP), with a limit of 28 mg/L. It describes a leachate-toxic constituent, not an industry, container or physical form. Ontario sets treatment requirements for land disposal separately.

Schedule
Schedule 4
Purpose
Leachate-toxic classification; Schedule 5 separately sets treatment standards
TCLP classification limit
≥ 28 mg/L
CAS
3383-96-8

Is temephos always Ontario E123?

CodeWhen it fits
E123The TCLP extract holds 28 mg/L or more of the constituent.
This constituent criterion not metThe TCLP extract holds less than 28 mg/L. Other hazardous criteria still need assessing.

A result below the limit for one constituent says nothing about other constituents, characteristic hazards or listed-waste rules. Apply the classification limit first, then look at the separate land-disposal treatment standard.

Which wastes take Ontario E123?

WasteWhen it’s E123
Contaminated soilMeasured extract concentration (individual limit)

Which codes sit beside Ontario E123?

CodeWhat it is
E118Nitrate + Nitrite (as Nitrogen)
E119Nitrilotriacetic acid (NTA)
E120Paraquat
E121Picloram
E122Simazine
E124Terbufos
E125Trifluralin
E126Uranium