(a) All swimming pools shall be provided with approved mechanically operated, positive displacement disinfectant feeding equipment, or other disinfection equipment NSF approved or approved by the Director, which:
(1) Shall be capable of providing a continuous and effective residual of disinfectant within the swimming pool water twenty-four hours per day;
(2) Shall have a design feed rate which will provide effective disinfection levels when the swimming pool is in peak demand conditions;
(3) Shall be capable of applying a dose the equivalent to maintain a concentration of at least one ppm free chlorine or two ppm bromine throughout the swimming pool at all times of operation and be capable of applying a dose up to 10 ppm chlorine or 20 ppm bromine.
(4) Shall be equipped with a flow indicator on the supply line.
(b) The use of chlorine gas as a disinfectant shall not adversely affect the safety and health of patrons, pool personnel, or the public; shall comply with OSHA and Loudoun County Fire Marshal requirements; and shall comply with the following:
(1) Chlorine gas feeding equipment and chlorine gas cylinders shall be installed in a room separate from the filter room(s) and electrical panels and shall be equipped with a lockable door. Gas chlorinator rooms shall be equipped with a forced draft fan exhausting to the outside from the floor level. The exhaust fan shall provide a minimum of sixty air changes per hour. A fresh air inlet shall be provided near the ceiling. The gas chlorinator room shall be located above ground level and below the deck level of all pools. The chlorine gas tanks shall be protected from direct sunlight and securely fastened in place during storage and use, and shall be mounted on a scale when in use. A self-contained gas mask for chlorine or a gas mask with a supply of oxygen under positive pressure or compressed air shall be provided at facilities where chlorine gas is utilized. The chlorine gas mask shall be approved by the Bureau of Mines and the Loudoun County Fire Marshal. The gas mask shall be located accessible to, but outside of, the gas chlorinator room. The chlorinator shall be provided with an emergency cut-off device to prevent gas discharge or injection of gas during electrical outage. A gas chlorine detection device with an alarm shall be provided.
(2) The use of gas chlorine as a disinfectant shall require a chemical feeder for the feeding of sodium carbonate into the recirculation system.
(3) The use of gas chlorine as a disinfectant shall require that a supply of ammonium hydroxide be present for the checking of leaks in the chlorination system.
(c) When the pool water recirculation system is equipped with an automatic chemical control mechanism that continuously analyzes the pool water and automatically activates chemical feeding, a water flow sensing device shall be provided that automatically deactivates all associated chemical feeders when the water flow in the recirculation system ceases.
(d) When bromine is used as the disinfectant, the following shall be followed:
(1) Bromine shall be fed on a continuous basis;
(2) A concentration of at least two ppm bromine residual shall be maintained throughout the pool water at all times. A maximum of six ppm bromine residual shall be permitted in any swimming pool during use.
(3) Solid stick or tablet type bromine shall be used with NSF International certified commercial feed equipment.
(Ord. 07-14. Passed 12-18-07.)