California waste code 122 Caustic solution above pH 12.5 with none of the listed metals.

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Based on California Title 22 and DTSC guidance
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Inorganics
Alkaline liquid without listed metals

Hazardous alkaline liquid without a code 121 metal and with pH above 12.5.

Hazardous caustic liquid at pH above 12.5 with no metal from code 121. Liquid with a listed metal takes code 121.

Is California code 122 hazardous waste?

Not from the code alone. The material must first be determined hazardous. California code 122 is not restricted, and a restricted code takes priority over it. A non-restricted code doesn't make a waste non-hazardous.

If the shipment needs the Uniform Hazardous Waste Manifest, enter 122 in Item 13 for the waste line. Use one California code, plus any federal RCRA codes when the waste is federally hazardous.

Waste is RCRA waste when it meets a federal listing or characteristic and no federal exclusion applies. 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 determination.

What does California code 122 cover?

This is for hazardous alkaline solution with none of the metals named under code 121. The numerical table needs a pH above 12.5. The alphabetical table includes exactly 12.5, so that boundary is unsettled.

Rule: Appendix XII(b)
Official wording: 22 CCR division 4.5, chapter 11, Appendix XII(b)

Is alkaline liquid without listed metals California code 122?

Code	When it fits
122	No code 121 metal is present and the measured pH is above 12.5.
121	A listed metal is present and DTSC confirms code 121 under the conflicting pH tables.
123	The alkaline liquid is hazardous but neither specific alkaline code is established.

The numerical and alphabetical tables of Appendix XII disagree on whether exactly pH 12.5 belongs here. Measurement tolerance can't settle a conflict in the published rules, so confirm that boundary with DTSC.

Which wastes take California code 122?

Waste	When it’s 122
Caustic soda solution	A sodium-hydroxide solution with a pH above 12.5 and no listed metal.
Alkaline cleaning solution	A cleaner with a pH above 12.5 and no listed metal.
Concrete washout and slurry	A washout with a pH above 12.5 and no listed metal.

Which codes sit beside California code 122?

Code	What it is
131	Reactive-anion water-based liquid
132	Metal-bearing water-based liquid
133	High-organic water-based liquid
134	Low-organic water-based liquid
135	Other water-based hazardous liquid
141	Unused inorganic material
151	Friable or powdered asbestos
161	Used oil-refinery cracking catalyst