California waste code 331 Organic stock never used, gone off or left over.

Free, no account
Based on California Title 22 and DTSC guidance
Nothing is stored

Organics
Unused organic material

The hazardous organic product is off-specification, aged or surplus before use.

Unused organic chemicals that are off-specification, aged or surplus. Spent solvents and process residues have their own codes.

Is California code 331 hazardous waste?

Not from the code alone. The material must first be determined hazardous. California code 331 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 331 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 331 cover?

This is for an organic product that became hazardous waste before use, because it was off-specification, too old or surplus. It isn't for solvent after use or residue from a process.

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

Is unused organic product California code 331?

Code	When it fits
331	The organic product became waste before use because it was off-specification, aged or surplus.
211	A halogenated solvent, when restricted code 741 doesn't apply.
311	The hazardous organic product is a medicine or pharmaceutical preparation.
461	Paint handling produced settled or separated hazardous sludge.

The regulations don't say which code wins when unused organic material also fits a specific non-restricted code, such as halogenated solvent 211 or pharmaceutical 311.

Which wastes take California code 331?

Waste	When it’s 331
Paint waste	Organic paint became waste before use because it was off-specification, aged or surplus.
Toluene waste	Off-specification, aged or surplus toluene never used as solvent.
Off-specification organic chemical	The organic chemical became waste before use because it was off-specification, aged or surplus.
Waste gasoline and diesel	Unused hazardous organic fuel that is off-specification, aged or surplus.

Which codes sit beside California code 331?

Code	What it is
281	Discarded adhesive
291	Discarded latex material
321	Hazardous sewage sludge
322	Other hazardous biological waste
341	Halogenated non-solvent organic liquid
342	Organic liquid with listed metals
343	Other organic liquid mixture
351	Organic solid with halogens