- (a) An approach channel must be unobstructed and have a minimum length of 4.0 feet before the first ultraviolet (UV) bank.
- (b) The downstream channel length must be unobstructed for a minimum length of 4.0 feet following the last bank of UV lamps and before a fluid-level control device.
- (c) Inlet channels must be designed to provide equal flow distribution across all UV channels.
- (d) A downstream discharge point of a reactor must include a level control that ensures that the UV lamps remain submerged at a near-constant depth, regardless of flow.
- (e) The upstream and downstream portions of a UV reactor channel between UV banks must be covered to shut out all natural light.
Source Note:The provisions of this §217.297 adopted to be effective August 28, 2008, 33 TexReg 6843.