# Approval and Promulgation of Air Quality Implementation Plans; Texas: Redesignation Request and Maintenance Plan for the Collin County Lead Nonattainment Area
> **Rule** · Direct final rule. · Published 1999-10-13 · Effective 1999-12-13 · 64 FR 55421
## Document
- **Document number:** 99-26329
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 55421
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-10-13
- **Effective date:** 1999-12-13
- **State:** TX
- **EPA docket:** TX-112-1-7421a
## Abstract

We are approving a request from the Texas Natural Resource Conservation Commission (TNRCC) to redesignate Collin County, Texas, to attainment for the lead National Ambient Air Quality Standard (NAAQS). This request was submitted to us by the Governor on August 31, 1999. The request was accompanied by a demonstration from TNRCC that continued compliance with the lead NAAQS can reasonably be expected. The maintenance plan also includes a summary of the measured lead concentrations from 1995-1998, an inventory of the annual lead emissions in the County, the permitted and enforceable conditions responsible for continued compliance with the lead NAAQS, and contingency measures, should a future violation occur.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/10/13/99-26329/approval-and-promulgation-of-air-quality-implementation-plans-texas-redesignation-request-and)
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