K142 RCRA waste code Sludge from storage tanks holding coke-oven tar.

Free, no account
Based on 40 CFR 261.32 and EPA hazardous-waste rules
Nothing is stored

K-listed waste
Tar-tank residue from making coke or recovering coke by-products

Industry: Coking.

Toxic K-listed waste from coking. Tar storage tank residues from making coke from coal or recovering coke by-products.

Is K142 hazardous waste?

Yes. K142 is a nonacute K-listed hazardous waste when the source process and waste stream match. Its federal hazard code is (T), for toxicity.

K142 is listed by source, so how and where the waste arose decides it, not a concentration test alone. A test may add a characteristic code but doesn't remove the listing. On a required hazardous waste manifest, put K142 in Item 13. See VSQG exemptions and empty-container rules.

What does K142 cover?

Residue from tar storage tanks in making coke from coal or recovering coke by-products. The 261.4(a)(10) exclusion needs the residue recycled to coke ovens or tar recovery, or mixed with coal tar, with no land disposal before recycling.

Hazard code: (T), toxicity
Industry: Coking
Rule: 40 CFR 261.32

Is coke tar-tank residue K142 or another code?

Code	When it fits
K142	It is tar storage tank residue from making coke or recovering coke by-products.
K141	It is coal-tar recovery residue, including collecting-sump residue from coke or coke-by-product production, but not K087 sludge.
K143	It is light-oil recovery residue from coke by-products, including still, decanter or wash-oil-unit residue.

The industry, production step and waste form tell these K listings apart, not chemical content. The rows show nearby listed streams, not every code that can apply. Add any characteristic or other listing that also fits, as one waste can carry more than 1 federal code.

Which wastes take K142?

Waste	When it’s K142
Coke tar storage-tank residue	It is tar storage-tank residue from coke production or coke by-product recovery.

Which codes sit beside K142?

Code	What it is
K126	Dust and floor sweepings from making or formulating dithiocarbamate pesticides
K131	Reactor water and spent acid from making methyl bromide fumigant
K132	Spent absorbent and separator solids from making methyl bromide fumigant
K136	Bottom purification residue from making ethylene dibromide
K144	Sump residue from refining light oil from coke by-products
K145	Naphthalene recovery residue from coke by-products
K147	Tar-tank residue from refining coal tar
K148	Distillation residue from coal tar