D033 RCRA waste code Chlorinated solvent waste that leaches 0.5 mg/L or more.

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Based on 40 CFR 261.24
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Characteristic hazardous waste
Hexachlorobutadiene

Hexachlorobutadiene at 0.5 mg/L or more in the TCLP extract.

Toxic characteristic waste. Waste with hexachlorobutadiene at 0.5 mg/L or more in the TCLP test. It is a chlorinated solvent by-product.

Is D033 hazardous waste?

Yes. D033 is hazardous waste when the TCLP extract of a representative sample holds hexachlorobutadiene at 0.5 mg/L or more. That makes it toxic hazardous waste, whatever industry or process it came from.

Compare the hexachlorobutadiene in the TCLP extract with 0.5 mg/L. A total hexachlorobutadiene result is a different measure, so it can't be compared with this limit.

D033 is a nonacute characteristic. On a required hazardous waste manifest, put D033 in Item 13. See VSQG exemptions and empty-container rules.

What does D033 cover?

D033 applies when the TCLP extract of a representative waste sample holds hexachlorobutadiene at 0.5 mg/L or more. The limit is for the extract, not the waste’s total hexachlorobutadiene.

CAS: 87-68-3
Regulatory level: 0.5 mg/L in TCLP extract
Hazard: T, toxic
Rule: 40 CFR 261.24

Is hexachlorobutadiene waste always D033?

Code	When it fits
D033	A representative sample’s TCLP extract contains hexachlorobutadiene at or above 0.5 mg/L.
D004–D043	The hexachlorobutadiene result is below 0.5 mg/L. Another contaminant or characteristic may still apply.
U128	Unused hexachlorobutadiene is discarded pure, technical grade, or as the product’s sole active ingredient.

Generators decide the codes from testing or knowledge of the waste, under 40 CFR 262.11. A result below 0.5 mg/L rules out D033 only. It doesn't make the waste nonhazardous.

Which wastes take D033?

Waste	When it’s D033
Contaminated soil	Hexachlorobutadiene leaching from contaminated soil reaches the TCLP limit

Which codes sit beside D033?

Code	What it is
D029	1,1-Dichloroethylene
D030	2,4-Dinitrotoluene
D031	Heptachlor (and its epoxide)
D032	Hexachlorobenzene
D034	Hexachloroethane
D035	Methyl ethyl ketone
D036	Nitrobenzene
D037	Pentachlorophenol