Section 435.17 - Pool Supervision(1) All public and semi-public swimming pools when open for use shall be under the management of a supervisor, who shall be responsible for all phases of the pool operation. The pool supervisor may be the property owner, a facility employee or an employee of a contracted pool service. The pool supervisor shall be available to respond to mechanical and maintenance problems, and to detect the potential of such problems before they occur. It is not required that the pool supervisor be on the premises at all times. The pool supervisor shall be: (a) at least 21 years of age,(b) knowledgeable of 105 CMR 435.00, and(c) responsible for all phases of the operation.(2) Effective January 1, 1999 the pool supervisor of all public and semi-public swimming pools shall have successfully completed a course in the safe and effective operation and maintenance of swimming pools as evidenced by certification as a Pool Operator from the YMCA, the National Swimming Pool Foundation, or from any other organization providing equivalent training, subject to the approval of the Department.(3) The pool supervisor shall ensure that on-site pool personnel are adequately trained in the safe, sanitary and effective operation of the pool and its equipment. Training may be in the form of verbal and/or written instruction. The training must include at a minimum the following:(a) an explanation of the filtration and recirculation system;(b) pool water disinfection and control agents;(c) pool water chemistry and testing;(d) record keeping as required by 105 CMR 435.21(5);(e) water quality chemicals;(f) proper health and safety precautions when handling pool chemicals and equipment;(g) cross connection control; and(h) first aid and safety equipment(4) If required by the Board of Health, there shall be at least one trained person on the premises at all times that the pool is open. This individual may be the pool supervisor, a lifeguard, a pool attendant or any other trained person. The board when determining whether there is a need for the trained person, and the minimum training or certification requirements for this person, shall take into account the size and capacity of the pool(s), the average attendance, the complexity of the dis in fection equipment, and the facility's history of compliance with the regulations.(5) The pool supervisor shall conduct a site visit to the pool at least once a week to ensure the pool is being operated in a safe and sanitary manner. The pool supervisor shall record the findings of his/her site visit in the records required to be maintained by 105 CMR 435.21(5).