37.115.1811 SPLASH DECKS - WATER CIRCULATION
(1) Splash decks may be constructed so that the water drains immediately to a waste water system. Splash decks must use water from an approved water supply. The water that is drained to a waste water system shall be disposed of in a manner approved by the Department of Environmental Quality.
(2) If the water from a splash deck does not drain immediately to a waste water system, then a chlorination system and filtration system must be in place that meets the requirements of these rules.
(3) A circulation system consisting of pumps, piping, filters, water conditioning and disinfectant equipment and other accessory equipment which meet the requirements of these rules shall be provided which will clarify, chemically balance, and disinfect the water. The splash deck's treatment tank filtration circulation and chemical disinfectant equipment must operate 24 hours a day.
(4) Water may be used one time and immediately drained to waste water or it may be circulated and disinfected. Existing splash decks that circulate water must circulate the entire volume of water through an approved treatment system every hour or less.
(5) A surge tank constructed or installed after March 1, 2010 for a splash deck must hold a minimum of 4000 gallons. The surge tank capacity must also be at least three times the combined flow rates of all attraction features and recirculation pumps based upon a minimum flow of five gallons per minute.
(6) An automatic water level controller shall be provided for the splash deck treatment tank.
(7) A screen or similar device shall be provided through which all water from the splash deck shall pass before entering the splash deck recirculation tank. In the alternative, the splash deck may use another method or process that is approved by the department and provides for the removal of debris on the surface layer of the water in the recirculation tank.
(8) Sufficient numbers of filtered or treated water inlets shall be provided and located to ensure complete mixing and circulation of treated water within the splash deck recirculation tank.
(9) At least one main drain suction outlet that supplies water to the splash deck circulation tank filtration system shall be provided at the deepest point in the splash deck recirculation tank.
(10) The pipes, fittings, and valves of the recirculation system shall be sized so that velocities of water in the piping does not exceed six feet per second under suction, ten feet per second under pressure, or three feet per second in gravity flow. The water velocity limits may be exceeded when hydraulic computations indicate that use of higher velocities will not adversely affect the splash deck recirculation
(11) A means of continuously measuring the rate of water flow shall be provided in the recirculation system.
(12) An automatic feeder which is easily adjustable shall be provided for the application of disinfectant.
History: 50-53-103, MCA; IMP, 50-53-101, 50-53-102, 50-53-103, 50-53-104, 50-53-106, 50-53-107, MCA; NEW, 2010 MAR p. 80, Eff. 1/15/10; AMD, 2011 MAR p. 2657, Eff. 12/9/11.