Compliance
Hazardous waste record retention
What to keep, how long, and why three years is the floor rather than the answer.
Manifests, waste determinations, biennial reports, exception reports and training records are retained for at least three years under 40 CFR 262.40. The period extends automatically during any enforcement action or unresolved matter.
Source: 40 CFR 262.40Retention by record type
| Record | Minimum period | Runs from | Notes |
|---|---|---|---|
Manifests | 3 years | Date transporter accepted waste | Signed copy, not the initial one |
Waste determinations | 3 years | Date waste last sent off site | Including the supporting basis |
LDR notifications | 3 years | Date of shipment | Per stream, per facility |
Biennial reports | 3 years | Due date of the report | |
Exception reports | 3 years | Date of the report | |
Training records | 3 years | Date employee last worked | Current employees: while employed |
Inspection logs | 3 years | Date of inspection | Weekly accumulation area checks |
Why three years is not the right answer
Three years is the regulatory minimum. Cradle to grave liability has no expiry. A site that sent waste somewhere twenty years ago can still find itself named in an action about that facility, and the only useful defence is the documentation showing what was sent, how it was characterized, and that the receiving facility was authorized.
Storage is cheap now. Scanning the manifest file and keeping it permanently costs almost nothing and is the single most useful thing a generator can do for its own future position.
Common questions
Can records be kept electronically?
Yes. Scanned or electronic copies are acceptable provided they are legible, complete and readily retrievable. Readily retrievable means during an inspection, not eventually.
What if I acquire a facility?
The records should come with it, and it is worth making that explicit in the transaction. Environmental liability frequently follows the property, and the absence of historical waste records is a real problem to inherit.
Do I keep records for closed sites?
Yes, and longer than the minimum. A closed site with no records is difficult to defend if a downstream facility becomes the subject of an action years later.
Related services
Not sure how this applies to your site?
Send a profile, an old manifest, or photographs of the drums. A technical professional will tell you where you stand.
This page summarizes federal requirements and is not legal advice. State programs can be more stringent than the federal baseline. Verify against current federal and state regulations before acting. Last reviewed September 2026.