# List of Regulated Substances and Thresholds for Accidental Release Prevention; Stay of Effectiveness for Flammable Hydrocarbon Fuels
> **Rule** · Final rule; stay of effectiveness. · Published 1999-05-28 · Effective 1999-06-21 · 64 FR 29168
## Document
- **Document number:** 99-13539
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 29168
- **CFR reference:** 40 CFR 68
- **Publication date:** 1999-05-28
- **Effective date:** 1999-06-21
- **EPA docket:** FRL-6351-1
## Abstract

Pursuant to Clean Air Act (CAA) section 301(a)(1), 42 U.S.C. 7601(a)(1), the Agency is providing a six-month stay of the effectiveness of its Risk Management Plan (RMP) rule under CAA section 112(r) as it applies to processes containing no more than 67,000 pounds of certain flammable hydrocarbon fuels. Elsewhere in the Proposed Rules section of today's Federal Register, EPA is proposing an exemption that mirrors the terms of today's stay. This exemption would result in such processes no longer being subject to the Chemical Accident Prevention requirements of 40 CFR part 68. The exemption would not apply to processes that manufacture the fuel, contain above a threshold quantity of another (non-fuel) regulated substance, or processes connected to, or co- located with, another (non-fuel) covered process at the facility. This action provides a temporary stay while EPA completes rulemaking on the proposed exemption. While this stay is in effect, processes that would qualify for the proposed exemption are not subject to part 68. Today's stay is in addition to, and does not affect, the stay of the rule for propane processes recently entered by the U.S. Court of Appeals for the D.C. Circuit.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/05/28/99-13539/list-of-regulated-substances-and-thresholds-for-accidental-release-prevention-stay-of-effectiveness)
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