Section NR 810.13 - System maintenanceEach water supplier for all public water systems shall perform routine maintenance to ensure proper operation of the public water system. Record keeping shall be established to ensure proper scheduling.
(1) Each water supplier for community and nontransient noncommunity water systems shall perform all of the following: (a)Well pump maintenance . Vertical turbine and submersible well pumps shall be removed and inspected on a regular basis and maintenance provided as needed. A frequency of once every ten years is recommended.(b)Well seal inspection . The seal between the pump base and pump head shall be verified to meet the requirements of ss. NR 811.31(1) or 811.32(1) each time a pump is installed or reinstalled.(c)Vessels. Iron filters, softeners, and other similar closed treatment vessels shall be opened up, where practicable, and inspected at a minimum of once every 5 years.(d)Emergency power exercising . Emergency generators and auxiliary engines shall be exercised a minimum of once per month and quarterly under full load. A log shall be kept that documents when the unit was operated and maintenance that was performed on the unit. Water suppliers for those public water systems who rent, lease or borrow their generators shall have a contract with the owner of the unit, perform full-load exercising at least annually, and keep records showing when exercising was performed. Water suppliers for those public water systems with right angle units requiring mobile tractors shall perform full load exercising at least annually and keep records showing when exercising was performed. Operational and fueling procedures shall be included in the log.(e)Hydropneumatic tanks. Pressure tanks shall be flushed regularly to remove sediment. Tanks equipped with hatches shall have interior inspections a minimum of once every 5 years. Maintenance shall include removal of sediment, cleaning of biofilm, restoration of interior and exterior coating systems to prevent corrosion, cleaning and repair of sight glasses, air volume controls and exercising valves.(2) Unless an alternate schedule is approved by the department, each water supplier for community water systems shall perform all of the following: (a)Valve exercising. All distribution system valves shall be exercised a minimum of every 2 to 5 years. The department recommends 5 to 7 years for hydrant lead auxiliary valves.(b)Hydrant exercising. All hydrants shall be exercised at least once every 2 years.(c)Hydrant maintenance . Hydrants shall be maintained in proper working condition, consistent with the manufacturer's recommendations.(d)Flushing dead-end mains . A schedule shall be established for flushing dead-end mains or mains in other areas to remove sediment or water of poor quality.(e)Meter testing and calibration. For water utilities serving public water systems, master water meters in wellhouses, high lift pumping stations, booster pumping stations and metering stations shall be tested and calibrated at a minimum frequency of every 2 years or as required by s. PSC 185.83(2). Calibration results shall be documented and be within acceptable levels for the particular meter being calibrated.Wis. Admin. Code Department of Natural Resources NR 810.13
CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.