# p-Chlorophenoxyacetic acid, Glyphosate, Difenzoquat, and Hexazinone; Tolerance Actions
> **Rule** · Final rule. · Published 2006-09-27 · Effective 2006-09-27 · 71 FR 56392
## Document
- **Document number:** E6-15840
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 56392
- **CFR reference:** 40 CFR 180
- **Publication date:** 2006-09-27
- **Effective date:** 2006-09-27
- **EPA docket:** EPA-HQ-OPP-2006-0036
## Abstract

EPA is revoking certain tolerances for the plant growth regulator p-chlorophenoxyacetic acid and the herbicide hexazinone. Also, EPA is modifying certain tolerances for the plant growth regulator p-chlorophenoxyacetic acid and the herbicides glyphosate, difenzoquat, and hexazinone. In addition, EPA is establishing new tolerances for the herbicides difenzoquat and hexazinone.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/09/27/E6-15840/p-chlorophenoxyacetic-acid-glyphosate-difenzoquat-and-hexazinone-tolerance-actions)
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