California waste code 728 Liquid with 130 mg/L of thallium or more.

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Based on California Title 22 and DTSC guidance
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Restricted wasteCalifornia restricted wastes
Restricted thallium liquid

Liquid thallium is 130 mg/L or more, so this restricted entry takes priority.

Restricted hazardous waste for liquids with thallium at 130 mg/L or more. A result of exactly 130 mg/L is included.

Is California code 728 hazardous waste?

Not from the code alone. Code 728 is a restricted waste code, so it wins over any non-restricted code that also fits. Choose it after the hazardous waste determination. It doesn't prove the waste is hazardous or decide its federal RCRA status.

If a shipment needs the Uniform Hazardous Waste Manifest, enter 728 in Item 13 for its waste line. Use one California code, plus the federal RCRA codes when the waste is federally hazardous.

RCRA waste meets a federal listing or characteristic and has no federal exclusion. Non-RCRA waste is hazardous under California rules only. California presumes hazardous waste is RCRA unless the generator shows it isn't, so keep that record.

What does California code 728 cover?

This restricted entry is hazardous liquid with a representative thallium result of 130 mg/L or more. A lower result doesn't meet code 728, and it doesn't make the waste nonhazardous by itself.

Threshold: 130 mg/L or more in liquid
Official wording: 22 CCR division 4.5, chapter 11, Appendix XII(b)

Is thallium liquid California code 728 or 132?

Code	When it fits
728	Representative thallium is at least 130 mg/L in the liquid.
132	The aqueous liquid holds thallium but stays below the restricted threshold.

The current Appendix XII threshold includes exactly 130 mg/L. DTSC's 2017 guidance says greater than 130 mg/L. If more than one restricted code fits, confirm the single California code for the waste line. The rules give no general tie-breaker.

Which wastes take California code 728?

Waste	When it’s 728
Thallium-bearing waste	Liquid thallium is at or above 130 mg/L

Which codes sit beside California code 728?

Code	What it is
724	Restricted lead liquid
725	Restricted mercury liquid
726	Restricted nickel liquid
727	Restricted selenium liquid
731	Restricted PCB liquid
741	Restricted halogenated-organic liquid
751	Restricted halogenated-organic solids or sludge
791	Strongly acidic liquid