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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 252. Department of Environmental Quality |
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Chapter 655. Water Pollution Control Construction Standards [revoked] |
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Subchapter 21. Biological Treatment [revoked] |
| SECTION 252:655-21-1. Trickling filters [revoked] |
| SECTION 252:655-21-2. Activated sludge [revoked] |
| SECTION 252:655-21-3. Rotating biological contactors [revoked] |
| SECTION 252:655-21-4. Other biological systems [revoked] |