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37.115.1845    HOT SPRINGS POOLS AND SPAS AND FLOW-THROUGH HOT SPRINGS POOLS AND SPAS - GENERALLY

(1) Hot springs pools and other than a flow-through hot springs pool, must comply with all other provisions of these rules, except for the following:

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

(b) the temperature of a hot spring pool or spa or 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) All hot springs pools and spas including flow-through pools and spas, must meet the following requirements:

(a) 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.

(b) 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.

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.

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