| pp>(54) Stabilizer--A chemical that reduces the loss of chlorine in water due to the ultraviolet rays of the sun. Also known by the names cyanuric acid, isocyanuric acid, conditioner, and triazinetrione. (55) Stand-alone PIWF--A PIWF that does not share a water supply, disinfection system, filtration system, circulation system, or any other treatment system that allows water to co-mingle with a pool as defined in Subchapter L, §265.182 of this title. This does include a PIWF that shares a water supply, disinfection system, filtration system, circulation system, or any other treatment system that allows water to co-mingle with any other water feature other than a pool as defined in Subchapter L, §265.182 of this title. (56) TCEQ--Texas Commission on Environmental Quality, P.O. Box 13087, Austin, Texas 78711-3087, telephone (512) 239-1000, website: www.tceq.state.tx.us. (57) Total chlorine--The sum of both the free available chlorine and combined chlorine. (58) Treatment tank--The vessel, chamber, or tank used to collect the water that has been sprayed, dumped, or otherwise used at the PIWF and returned through the drains. (59) Turnover rate--The period of time (usually in hours) required to circulate a volume of water equal to the total pool and PIWF water volume, or in the case of a stand-alone PIWF, the PIWF water volume, through the filtration equipment. (60) Ultraviolet light (UV)--Electromagnetic radiation that is invisible to the human eye with wavelengths on the border of x-rays, about 4 nanometers, to just beyond violet in the visible spectrum, about 380 nanometers. (61) United States Environmental Protection Agency (EPA)--Ariel Rios Building, 12000 Pennsylvania Avenue, N.W., Washington, DC 20450, telephone (202) 272-0167, website: www.epa.gov. (62) Water quality testing device or kit--A product designed to measure the level of a specific chemical in the water of a PIWF. A water quality testing device or kit includes a method to provide a visual indication of chemical level, and may include one or more testing reagents and accessory items. |
