Section R392-303-26 - Geothermal Pool Water Bacteriological Quality(1) The local health officer shall: (a) collect routine bacteriological samples of the pool water at least once per month and at least two weeks apart, and collect additional samples for investigative purposes or as a follow-up of unsatisfactory samples, if necessary;(b) choose or approve the dates and times that the samples are collected based on when a representative level of bacteria would likely be found;(c) submit the bacteriological samples to a laboratory approved by Rule R444-14 to perform E. coli or fecal coliform testing; and(d) have the laboratory analyze the sample for either E. coli or fecal coliform and request that the laboratory report sample results within five working days to the local health department and the operator.(2) The operator shall review the laboratory results and take corrective action if the following standards are not met: (a) if the E. coli or fecal coliform levels are found to be greater than the maximum level of 63 CFU per 50 milliliters, the operator shall close the geothermal pool until sample results show the level is below 63 CFU;(b) If the results of any three of the last five E. Coli or fecal coliform samples taken from the geothermal pool exceed 63 CFU per 50 milliliters, the operator shall: (i) increase the rate of flow-through; (ii) reduce bather load as provided in Subsection R392-303-9(2); or(iii) both increase the flow rate and reduce the bather load.(3) The operator shall make adjustments as specified in Subsection (2)(b) until the lab report specified in Subsection (1)(d) consistently shows E. Coli or fecal coliform results of less than 63 CFU per 50 milliliters in collected samples.(4) As an alternative to closing the geothermal pool until sample results show acceptable bacteriological levels, the operator may temporarily close the pool and commence feeding a disinfectant to the pool water, meeting the requirements of Subsection R392-303-23(2) and the disinfectant concentration and pH requirements of Section R392-302-27, and then reopen the pool at least 45 minutes after the required disinfectant level has been achieved.(5) The disinfectant feeding to the geothermal pool must continue until pool water samples and the source water samples pass the bacteriological standards required for disinfected pools in Subsection R392-302-27(6)(d).(6) the operator shall post the reported level as required in Subsection R392-303-29(2).Utah Admin. Code R392-303-26
Adopted by Utah State Bulletin Number 2022-02, effective 1/3/2022