# Approval and Promulgation of Air Quality Implementation Plans; Maryland; Section 110(a)(2) Infrastructure Requirements for the 2008 Lead National Ambient Air Quality Standards
> **Rule** · — · Published 2014-07-29 · 79 FR 43943
## Document
- **Document number:** C1-2014-16556
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 43943
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-07-29
- **State:** MD
- **EPA docket:** EPA-R03-OAR-2013-0072
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/07/29/C1-2014-16556/approval-and-promulgation-of-air-quality-implementation-plans-maryland-section-110a2-infrastructure)
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