ATCP 76.18(4)(4) Increased testing. The department or its agent may require more frequent testing if the testing logs are not maintained and the operator demonstrates a lack of active managerial control.Pf ATCP 76.18 HistoryHistory: CR 22-021: cr. Register June 2023 No. 810, eff. 9-24-23. ATCP 76.19ATCP 76.19 Water supply and temperature. ATCP 76.19(1)(1) Water supply protection. A minimum air gap of 2 pipe diameters or 6 inches, whichever is less, shall exist between the potable water supply inlet and the overflow point of any pool, makeup tank, surge tank, solution tank, or slurry tank unless another approved backflow and backsiphonage prevention device is provided. P ATCP 76.19(2)(2) Water source. The water supplied to a pool shall be from a source approved by the Wisconsin department of natural resources pursuant to ch. NR 108, 811, or 812. P ATCP 76.19(3)(3) Water level. Proper water level shall be maintained at all times when the pool is open. Pf ATCP 76.19(3)(a)(a) Skimmers. Water levels in pools with skimmers shall be maintained at a level such that the weir is half submerged or in the case of a floating weir, used according to manufacturer’s directions. Pf ATCP 76.19(3)(b)(b) Gutters. Pools designed with gutters shall have a continuous water supply over the gutter to provide effective skimming. Pf ATCP 76.19(4)(a)1.1. An accurate thermometer shall be located in the pool water return line. Pf ATCP 76.19(4)(a)2.2. The thermometer shall be accessible for observation by the operator. Pf ATCP 76.19(4)(b)1.1. Except as provided in par. (d), the water temperature of an indoor pool shall be between 70°F or 21°C and 90°F or 32°C. P ATCP 76.19(4)(b)2.2. The minimum water temperature for an outdoor pool shall be 65°F or 18°C. P ATCP 76.19(4)(c)(c) Whirlpool water temperature. The water temperature in a whirlpool shall be greater than 90°F or 32°C, and may not exceed 104°F or 40°C. P ATCP 76.19(4)(d)1.1. Cold soak pools may be operated at a lower temperature than specified under par. (b). ATCP 76.19 HistoryHistory: CR 22-021: cr. Register June 2023 No. 810, eff. 9-24-23. ATCP 76.20(1)(a)(a) General requirement. Each pool shall be under the supervision of at least one operator, except that if multiple pools are located on the same premise, and licensed by the same person, they may be supervised by one operator. Pf ATCP 76.20(1)(b)(b) Operator responsibilities. Each operator shall be responsible for pool operation and maintenance including equipment shut-down, backwashing, daily maintenance and vacuuming, and maintenance of water quality pursuant to ch. ATCP 76. Pf ATCP 76.20(2)(a)1.1. Each water attraction or multiple water attractions on the same premise shall have at least one certified operator.Pf ATCP 76.20(2)(a)2.2. An owner of a pool who demonstrates a lack of active managerial control over the pool operation by having 2 or more reinspections in a 3-year period is required to have a certified operator. Pf