# Standards of Performance for Electric Utility Steam Generating Units for Which Construction is Commenced After September 18, 1978; Standards of Performance for Industrial-Commercial-Institutional Steam Generating Units
> **Rule** · Partial withdrawal of direct final rule. · Published 2001-06-11 · Effective 2001-06-11 · 66 FR 31177
## Document
- **Document number:** 01-14618
- **Category:** other
- **Federal Register citation:** 66 FR 31177
- **CFR reference:** 40 CFR 60
- **Publication date:** 2001-06-11
- **Effective date:** 2001-06-11
- **EPA docket:** FRL-6995-2
## Abstract

Due to relevant adverse comment, the EPA is withdrawing two provisions from the direct final rule published on April 10, 2001 for Subpart Da--Standards of Performance for Electric Utility Steam Generating Units for Which Construction is Commenced After September 18, 1978, and Subpart Db--Standards of Performance for Industrial- Commercial-Institutional Steam Generating Units (66 FR 18546). These provisions deal with the revised definition of "boiler operating day" and the data substitution requirement for missing data.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/06/11/01-14618/standards-of-performance-for-electric-utility-steam-generating-units-for-which-construction-is)
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