R392-302-21. Disinfectant and Chemical Feeders

  (1) A pool must be equipped with disinfectant dosing or generating equipment which conform to the NSF/ANSI 50-2015, standards relating to mechanical chemical feeding equipment, or be deemed equivalent by the Department.

  (2) All chlorine dosing and generating equipment, including erosion feeders, or in-line electrolytic and brine/bath generators, shall be designed with a capacity to provide the following, depending on the intended use:

  (a) Outdoor pools: 4.0 pounds of free available chlorine per day per 10,000 gallons of pool water; or

  (b) Indoor pools: 2.5 pounds of free available chlorine per day per 10,000 gallons of pool water.

  (3) Where oxidation-reduction potential controllers are used, the operator shall perform supervisory water testing, calibration checks, inspection and cleaning of sensor probes and chemical injectors in accordance with the manufacturer's recommendations. If specific manufacturer's recommendations are not made, the operator shall perform inspections, calibration checks, and cleaning of sensor probes at least weekly.

  (4) Where compressed chlorine gas is used, the following additional features must be provided:

  (a) Chlorine and chlorinating equipment must be located in a secure, well-ventilated enclosure separate from other equipment systems or equipment rooms. Such enclosures may not be below ground level. If an enclosure is a room within a building, it must be provided with vents near the floor which terminate at a location out-of-doors. Enclosures must be located to prevent contamination of air inlets to any buildings and areas used by people. Forced air ventilation capable of providing at least one complete air change per minute, must be provided for enclosures.

  (b) The operator shall not keep substances which are incompatible with chlorine in the chlorine enclosure.

  (c) The operator shall secure chlorine cylinders to prevent them from falling over. The operator shall maintain an approved valve stem wrench on the chlorine cylinder so the supply can be shut off quickly in case of emergency. The operator shall keep valve protection hoods and cap nuts in place except when the cylinder is connected.

  (d) A sign that meets the requirements of a "4 Inch Safety Sign" in R392-302-39(1), (2) and (3)(a) shall be attached to the entrance door to chlorine gas and equipment rooms that reads, "DANGER CHLORINE GAS" and display the United States Department of Transportation placard and I.D. number for chlorine gas.

  (e) The chlorinator must be designed so that leaking chlorine gas will be vented to the out-of-doors.

  (f) The chlorinator must be a solution feed type, capable of delivering chlorine at its maximum rate without releasing chlorine gas to the atmosphere. Injector water must be furnished from the pool circulation system with necessary water pressure increases supplied by a booster pump. The booster must be interlocked with both the pool circulation pump and with a flow switch on the return line.

  (g) Chlorine feed lines may not carry pressurized chlorine gas.

  (h) The operator shall keep an unbreakable bottle of ammonium hydroxide, of approximately 28 percent solution in water, readily available for chlorine leak detection.

  (i) A self-contained breathing apparatus approved by NIOSH for entering environments that are immediately dangerous to life or health must be available and must have a minimum capacity of fifteen minutes.

  (j) The breathing apparatus must be kept in a closed cabinet located outside of the room in which the chlorinator is maintained, and must be accessible without use of a key or lock combination.

  (k) The facility operator shall demonstrate to the local health department through training documentation, that all persons who operate, or handle gas chlorine equipment, including the equipment specified in Subsections R392-203-21(3)(h) and (i) are knowledgeable about safety and proper equipment handling practices to protect themselves, staff members, and the public from accidental exposure to chlorine gas.

  (l) The facility operator or his designee shall immediately notify the local health department of any inadvertent escape of chlorine gas.

  (5) Bactericidal agents, other than chlorine and bromine, and their feeding apparatus may be acceptable if approved by the Department. Each bactericidal agent must be registered by the U.S. Environmental Protection Agency for use in swimming pools.

  (6) Equipment of the positive displacement type and piping used to apply chemicals to the water must be sized, designed, and constructed of materials which can be cleaned and maintained free from clogging at all times. Materials used for such equipment and piping must be resistant to the effects of the chemicals in use.

  (7) All auxiliary chemical feed pumps must be wired electrically to the main circulation pump so that the operation of these pumps is dependent upon the operation of the main circulation pump. If a chemical feed pump has an independent timer, the main circulation pump and chemical feed pump timer must be interlocked.