NR 811.54(9)(h)(h) An ozone destruct temperature alarm shall sound when the temperature exceeds the designated preset value. NR 811.54(9)(i)(i) Audible alarms and warning lights shall be installed and maintained to insure operators are alerted to improper operating or hazardous conditions. NR 811.54(10)(a)(a) The maximum allowable ozone concentration in the air to which workers may be exposed may not exceed 0.1 ppm by volume. NR 811.54(10)(b)(b) Noise levels resulting from the operation of the ozonation system shall be controlled to within acceptable limits by special room construction and equipment isolation. NR 811.54(10)(c)(c) High voltage and high frequency electrical equipment shall meet current electrical and fire codes. NR 811.54(10)(d)(d) An exhaust fan shall be provided in the ozone generation and contactor rooms to remove ozone gas if a leak occurs and shall meet all of the following requirements: NR 811.54(10)(d)1.1. One complete air change per minute shall be provided when the room is occupied. NR 811.54(10)(d)2.2. The exhaust fan suction shall be located near the floor with the point of discharge located to avoid contamination of air inlets to other rooms and structures, to outside breathable air, or being blocked by snow or other obstructions. NR 811.54(10)(d)3.3. Air inlets shall be located near the ceiling and controlled to prevent adverse temperature variations. NR 811.54(10)(d)4.4. An exhaust fan switch shall be located outside of the entrance to the room with a signal light indicating fan operation when the fan can be controlled from more than one point. NR 811.54(10)(e)(e) A portable purge air blower that will remove residual ozone in the contactor prior to entry for repair or maintenance shall be provided. NR 811.54(10)(f)(f) A sign shall be posted indicating “No smoking, oxygen in use” at all entrances to the treatment plant. In addition, no flammable or combustible materials shall be stored within the oxygen generator areas. NR 811.54 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: am. (2) (d) 2. Register January 2024 No. 817, eff. 2-1-24. NR 811.55(1)(1) Radium removal. Water treatment to remove radium shall meet the following requirements: NR 811.55(1)(a)(a) General. Radium may be removed by using the water treatment processes of zeolite softening, lime-soda softening, reverse osmosis, hydrous manganese oxides, and adsorptive resins. Other processes may also be used to remove radium as approved by the department on a case-by-case basis. The process design shall address the fate of radium in the treatment process including waste disposal. Where applicable, disposal of treatment plant wastes containing radium shall normally be to a sanitary sewer or wastewater treatment plant. NR 811.55 NoteNote: It is recommended that measures be taken to protect workers from gamma radiation exposure and radon gas inhalation where applicable.
NR 811.55(1)(b)(b) Finished water quality. Radium removal processes shall be designed to provide a finished water with a radium content as close to 0 picocuries per liter as practical while maintaining a finished water that is not corrosive. The department shall determine allowable plant outlet water quality, including radium concentrations, based on the raw water quality and the treatment process proposed. If corrosive water is produced during the radium removal process, a department approved method of corrosion control shall be provided. NR 811.55(1)(c)(c) Finished water sampling and reporting. For the radium removal processes listed in par. (a), a minimum of 4 consecutive quarters of finished water sampling for radium shall be required after the plant becomes operational to demonstrate treatment effectiveness. For other proposed radium removal treatment methods, the required radium monitoring program shall be established by the department. The sampling shall be conducted under worst case conditions. Radium analyses shall be performed by a U.S. environmental protection agency approved laboratory. The laboratory shall forward a copy of the radiological analyses to the department in an electronic format. Water hardness monitoring equipment shall be provided to monitor for hardness breakthrough when softening is used for radium removal. Daily water hardness measurements shall be reported on the monthly operating report submitted to the department. Use of hardness monitoring to substitute for radium analyses shall only be allowed if demonstrated effective by simultaneous radium and hardness sampling conducted for one year. NR 811.55(1)(d)(d) Water softening. Treatment for radium removal using standard water softening processes shall comply with the requirements of s. NR 811.57. NR 811.55(1)(e)(e) Hydrous manganese oxides. Water treatment using hydrous manganese oxides for radium removal shall meet the following requirements: NR 811.55(1)(e)1.1. Each installation shall be individually pilot tested on-site under a department approval unless the pilot testing requirement is waived by the department based upon documentation of successful similar treatment performance at wells with similar water quality. NR 811.55(1)(e)2.2. Pre-mixed or on-site mixed hydrous manganese oxide chemicals shall conform to the applicable NSF/ANSI Standard 60 and AWWA standards as required by s. NR 810.09 (1) (c). NR 811.55(1)(f)(f) Adsorptive resins. Water treatment using adsorptive resins for radium removal that will continuously accumulate radium on the resin shall meet the following requirements. NR 811.55(1)(f)1.1. Each installation shall be individually pilot tested on-site under a department approval unless the pilot testing requirement is waived by the department based upon documentation of successful similar treatment performance at wells with similar water quality. NR 811.55(1)(f)2.2. The radiation protection section of the department of health services shall be contacted to obtain a radioactive material license to operate pilot and full scale installations prior to constructing or operating the systems. NR 811.55(1)(g)(g) Other treatment. Other radium removal treatment processes may be approved by the department on a case-by-case basis using information obtained from department approved on-site pilot studies conducted on the water to be treated. NR 811.55(1)(h)(h) Waste disposal. Disposal of radium removal treatment plant waste shall comply with subch. XII.