# Approval and Promulgation of Air Quality Implementation Plans; Delaware; Control of Nitrogen Oxide Emissions From Industrial Boilers and Process Heaters at Petroleum Refineries
> **Rule** · — · Published 2010-06-10 · 75 FR 32858
## Document
- **Document number:** C1-2010-13377
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 32858
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-06-10
- **State:** DE
- **EPA docket:** EPA-R03-OAR-2010-0039
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/06/10/C1-2010-13377/approval-and-promulgation-of-air-quality-implementation-plans-delaware-control-of-nitrogen-oxide)
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