D037 RCRA waste code Wood preservative waste that leaches 100 mg/L or more.

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Based on 40 CFR 261.24
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Characteristic hazardous waste
Pentachlorophenol

Pentachlorophenol at 100 mg/L or more in the TCLP extract.

Toxic characteristic waste. Waste with pentachlorophenol at 100 mg/L or more in the TCLP test. It is a wood preservative.

Is D037 hazardous waste?

Yes. D037 is hazardous waste when the TCLP extract of a representative sample holds pentachlorophenol at 100 mg/L or more. That makes it toxic hazardous waste, whatever industry or process it came from.

Compare the pentachlorophenol in the TCLP extract with 100 mg/L. A total pentachlorophenol result is a different measure, so it can't be compared with this limit.

D037 is a nonacute characteristic. On a required hazardous waste manifest, put D037 in Item 13. See VSQG exemptions and empty-container rules.

What does D037 cover?

D037 applies when the TCLP extract of a representative waste sample holds pentachlorophenol at 100 mg/L or more. The limit is for the extract, not the waste’s total pentachlorophenol.

CAS: 87-86-5
Regulatory level: 100 mg/L in TCLP extract
Hazard: T, toxic
Rule: 40 CFR 261.24

Is pentachlorophenol waste always D037?

Code	When it fits
D037	A representative sample’s TCLP extract contains pentachlorophenol at or above 100 mg/L.
D004–D043	The pentachlorophenol result is below 100 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 100 mg/L rules out D037 only. It doesn't make the waste nonhazardous.

Which wastes take D037?

Waste	When it’s D037
Contaminated soil	Pentachlorophenol leaching from contaminated soil reaches the TCLP limit
Treated wood waste	Pentachlorophenol leaching from treated wood waste reaches the TCLP limit

Which codes sit beside D037?

Code	What it is
D033	Hexachlorobutadiene
D034	Hexachloroethane
D035	Methyl ethyl ketone
D036	Nitrobenzene
D038	Pyridine
D039	Tetrachloroethylene
D040	Trichloroethylene
D041	2,4,5-Trichlorophenol