RCRA waste codes for treated wood Pressure-treated timber, posts & decking past their use.

Characteristic hazardous waste
Arsenic
Arsenic leaching from treated wood waste reaches the TCLP limit
When to use D004
Characteristic hazardous waste
o-Cresol
o-Cresol leaching from treated wood waste reaches the TCLP limit
When to use D023
Characteristic hazardous waste
m-Cresol
m-Cresol leaching from treated wood waste reaches the TCLP limit
When to use D024
Characteristic hazardous waste
p-Cresol
p-Cresol leaching from treated wood waste reaches the TCLP limit
When to use D025
Characteristic hazardous waste
Cresol
Cresol leaching from treated wood waste reaches the TCLP limit
When to use D026
Characteristic hazardous waste
Pentachlorophenol
Pentachlorophenol leaching from treated wood waste reaches the TCLP limit
When to use D037

Takes D004 for arsenic, D023 to D026 for cresols & D037 for pentachlorophenol when they leach.

Which RCRA codes can apply to treated wood waste?

Code	When it applies
D004	Arsenic leaching from treated wood waste reaches the TCLP limit
D023	o-Cresol leaching from treated wood waste reaches the TCLP limit
D024	m-Cresol leaching from treated wood waste reaches the TCLP limit
D025	p-Cresol leaching from treated wood waste reaches the TCLP limit
D026	Cresol leaching from treated wood waste reaches the TCLP limit
D037	Pentachlorophenol leaching from treated wood waste reaches the TCLP limit

The person discarding the wood must have used it for its intended end use.

The wood must fail only D004–D017.

The exclusion doesn't cover treater waste, a seller's unused stock, another hazardous property, D023–D026 or D037.

The arsenical-treated-wood exclusion covers only intended end use and D004–D017.