# Designation of Hazardous Substances; Designation, Reportable Quantities, and Notification
> **Rule** · Direct final rule. · Published 2012-02-22 · Effective 2012-04-23 · 77 FR 10387
## Document
- **Document number:** 2012-4060
- **Category:** hazardous-waste
- **Federal Register citation:** 77 FR 10387
- **CFR reference:** 40 CFR 302
- **Publication date:** 2012-02-22
- **Effective date:** 2012-04-23
- **EPA docket:** EPA-HQ-SFUND-2011-0965
## Abstract

EPA is taking direct final action to reinstate the maximum observed constituent concentrations for several listed hazardous wastes that were inadvertently removed from the regulations by a November 8, 2000 final rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/02/22/2012-4060/designation-of-hazardous-substances-designation-reportable-quantities-and-notification)
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