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TITLE 30ENVIRONMENTAL QUALITY
PART 1TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
CHAPTER 217DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS
SUBCHAPTER LULTRAVIOLET LIGHT DISINFECTION
RULE §217.300Post-Disinfection Requirements
(a) Sample points. Sampling points must be identified in the engineering report. A design must include a sufficient number of sampling points to:

  (1) allow an operator to monitor the disinfection system for process control; and

   (2) allow monitoring of permitted effluent limits.

 (b) Dissolved Oxygen Requirements. A wastewater treatment facility must be designed with the ability to add post-aeration if needed to meet effluent limits for dissolved oxygen in the wastewater permit. If the wastewater permit requires a minimum dissolved oxygen of 5.0 milligrams per liter or greater, the engineering report must include calculations that demonstrate how the post-aeration system will maintain the minimum dissolved oxygen level.
Source Note: The provisions of this §217.300 adopted to be effective August 28, 2008, 33 TexReg 6843; amended to be effective December 4, 2015, 40 TexReg 8254

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