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Oklahoma Administrative Code
Title 310
Chapter 380
Subchapter 17
Biological Treatment
Oklahoma State Department of Health
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310:380-17-1
Trickling Filters
Repealed
310:380-17-2
Activated Sludge
Repealed
310:380-17-3
Rotating Biological Contactors
Repealed
310:380-17-4
Other Biological Systems
Repealed