D042 RCRA waste code Biocide & preservative waste that leaches 2 mg/L or more.

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Based on 40 CFR 261.24
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Characteristic hazardous waste
2,4,6-Trichlorophenol

2,4,6-Trichlorophenol at 2 mg/L or more in the TCLP extract.

Toxic characteristic waste. Waste with 2,4,6-trichlorophenol at 2 mg/L or more in the TCLP test. A biocide chemical.

Is D042 hazardous waste?

Yes. D042 is hazardous waste when the TCLP extract of a representative sample holds 2,4,6-trichlorophenol at 2 mg/L or more. That makes it toxic hazardous waste, whatever industry or process it came from.

Compare the 2,4,6-trichlorophenol in the TCLP extract with 2 mg/L. A total 2,4,6-trichlorophenol result is a different measure, so it can't be compared with this limit.

D042 is a nonacute characteristic. On a required hazardous waste manifest, put D042 in Item 13. See VSQG exemptions and empty-container rules.

What does D042 cover?

D042 applies when the TCLP extract of a representative waste sample holds 2,4,6-trichlorophenol at 2 mg/L or more. The limit is for the extract, not the waste’s total 2,4,6-trichlorophenol.

CAS: 88-06-2
Regulatory level: 2 mg/L in TCLP extract
Hazard: T, toxic
Rule: 40 CFR 261.24

Is 2,4,6-trichlorophenol waste always D042?

Code	When it fits
D042	A representative sample’s TCLP extract contains 2,4,6-trichlorophenol at or above 2 mg/L.
D004–D043	The 2,4,6-trichlorophenol result is below 2 mg/L. Another contaminant or characteristic may still apply.

Generators decide the codes from testing or knowledge of the waste, under 40 CFR 262.11. A result below 2 mg/L rules out D042 only. It doesn't make the waste nonhazardous.

Which wastes take D042?

Waste	When it’s D042
Contaminated soil	2,4,6-Trichlorophenol leaching from contaminated soil reaches the TCLP limit

Which codes sit beside D042?

Code	What it is
D035	Methyl ethyl ketone
D036	Nitrobenzene
D037	Pentachlorophenol
D038	Pyridine
D039	Tetrachloroethylene
D040	Trichloroethylene
D041	2,4,5-Trichlorophenol
D043	Vinyl chloride