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D List — Characteristic Hazardous Wastes Toxic (TCLP characteristic)

RCRA Hazardous Waste Number

D004

Toxicity characteristic waste - Arsenic at or above 5.0 mg/L (TCLP)

Official source: 40 CFR Part 261 (eCFR)

Have a D004 stream? See the dossier that replaces the feasibility study.

See the validation dossier
Medium recoveryMetals recovery (HTMR / hydrometallurgical)
Low recoveryStabilization & controlled disposal
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Hazard Basis

Toxic (TCLP characteristic)

Contaminant

Arsenic

Regulatory Level (TCLP)

5.0 mg/L

Regulation

40 CFR Part 261

Need recovery options for a D004 stream?

Map recovery routes for D004

Classification

See the full D list

Wastes that are hazardous because of what they do, not where they come from: ignitability (D001), corrosivity (D002), reactivity (D003), or toxicity (D004-D043, defined by TCLP contaminant thresholds). Any industrial waste stream can carry a D code.

How D004 is handled

01

A D code is determined by testing, not by source: TCLP for toxicity (D004-D043), flash point for ignitability (D001), pH for corrosivity (D002).

02

Characteristic wastes can exit hazardous status when the characteristic is removed - treatment to below the regulatory level is a recognized compliance path.

03

Generators must count D-coded streams toward their monthly generator status (VSQG / SQG / LQG).

Where can a D004 stream go?

Recognized recovery routes for this waste family, ranked by typical recovery tier. Which route fits depends on your specific stream — composition, volume and region.

Metals recovery (HTMR / hydrometallurgical)

Medium recovery

Metal-bearing residues route to high temperature metals recovery or hydrometallurgical processing, where the contained metals are extracted and returned to commerce as secondary raw material.

40 CFR 268.42 Table 1 — HTMR technology standard

Stabilization & controlled disposal

Low recovery

Below economic metal concentrations, stabilization to the land disposal restriction treatment standard followed by controlled disposal remains the default management route.

40 CFR 268.40 — LDR treatment standards

These are the typical routes for the D list. Your stream's actual options depend on its composition and where it sits.

See how this gets validated

Simulate your D004 stream

Toxicity characteristic waste - Arsenic at or above 5.0 mg/L (TCLP)

With a lab analysis, the engine checks the stream against each receiving route's published limits and returns what is supported, what is refused, and why. Without one yet, we tell you which routes it can evaluate and what analysis that needs.

What do you need?

An engineer replies within 1 business day. That reply confirms what is needed to run the dossier and when it can follow. A route the engine does not cover yet is reported as not yet evaluable, with the evidence that would change that.

See what the output looks like: a worked dossier.