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37.115.1845    FLOW-THROUGH HOT SPRINGS POOLS AND SPAS - GENERALLY

(1) A flow-through hot springs pool or spa must comply with all other provisions of these rules, except for the following:

(a) the pH of pool water in a flow-through hot spring pool must be maintained at no less than 7.2 and no greater than 9.4 with proper signage;

(b) the temperature of a flow-through hot spring pool or spa may not exceed 106°F in a pool or spa primarily used for soaking and may not exceed 100°F in a pool used primarily for swimming; and

(c) the turnover rate of a flow-through hot spring pool may not exceed eight hours.

(2) Every hot springs pool or spa or flow-through hot spring pool or spa must be equipped with an accurate flow indicator to measure the turnover rate, except that the department may approve the use of an alternate method of establishing an accurate flow rate. To demonstrate that an alternative means of measurement is accurate, the applicant must submit a written application for approval to use that alternative method. The application must demonstrate that the alternative method accurately measures the water volume exchange to produce an 8-hour turnover of the entire volume of pool water to waste water discharge.

(3) Every hot springs pool or spa or flow-through hot springs pool or spa must have an inline thermometer installed to monitor the temperature of the pool. The department may allow an alternative method of monitoring pool temperature upon a showing by an applicant who demonstrates that the water temperature can be accurately measured by the alternative method and that the use of the alternative method does not have the potential to cause adverse public health effects. When an alternative method is used to monitor pool temperature, the licensee is responsible for recording the pool temperatures a minimum of twice a day or more frequently as needed to demonstrate that the temperature is being regulated. The reading shall be recorded and maintained on forms approved by the department.

(4) A sign shall be posted that states: "For their protection, children under the age of 5 are not allowed to enter water over 100 degrees Fahrenheit. The temperature of the pool is _________, checked at (time) and the pH is ________". The letters in the posting shall be four inches tall and on a separate sign. This requirement must be posted by December 31, 2011.

(5) A thermometer must be in place, available for the patrons to check. Documentation of weekly thermometer calibration must be kept on file for three years.

History: 50-53-103, MCA; IMP, 50-53-101, 50-53-102, 50-53-103, 50-53-104, 50-53-106, 50-53-107, 50-53-108, 50-53-115, MCA; NEW, 2010 MAR p. 80, Eff. 1/15/10; AMD, 2011 MAR p. 2657, Eff. 12/9/11.

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