R392-304-7. Artificial Swimming Lagoon Source Water Quality

(1) If the source water for the DSA of an artificial swimming lagoon is not from a public drinking water system as described in Rule R309-100, the operator shall: (a) collect a sample of the source water before initial operation and at least once every five years thereafter; (b) submit the collected sample for analysis to a laboratory that is certified under Rule R444-14; and (c) ensure that the source water complies with the contaminant limits specified in Table 1. (2) If the source water analysis report described in Subsection (1) indicates that a contaminant level exceeds any standard in Table 1, the operator shall: (a) discontinue the use of the source water; or (b) implement treatment to achieve compliance with Table 1 before introducing the water into a designated swimming area. TABLE 1 Source Water Contaminants and MCLs Contaminant Maximum Contaminant Level (MCL) Antimony 0.006 mg/L Arsenic 0.010 mg/L Barium 5 mg/L Beryllium 0.004 mg/L Cadmium 0.005 mg/L Chromium 0.5 mg/L Copper 2.0 mg/L Fluoride 8.0 mg/L Lead 0.015 mg/L Mercury 0.002 mg/L Nitrate 50 mg/L Selenium 0.05 mg/L Thallium 0.002 mg/L (3) The operator shall maintain a closed-loop system for water recirculation. (4) If the water source for the DSA of an artificial swimming lagoon is connected to a public or private potable water source, the operator shall ensure that: (a) the water source system is protected from a backflow or back-siphonage event with a backflow preventer, such as an air gap, a mechanical backflow prevention device, or another means or method in accordance with Plumbing Code; and (b) the backflow preventer does not connect to the discharge side of a recirculation pump of an artificial swimming lagoon. (5) The operator shall: (a) measure and record the total dissolved solids (TDS) concentration of the filled lagoon water before the initial operation of the DSA to establish the startup baseline TDS concentration; (b) monitor TDS in each DSA at least annually thereafter; and (c) ensure that TDS does not increase by more than 1,500 mg/L above the established startup baseline, unless the operator demonstrates to the local health officer that the increased concentration does not impair: (i) disinfection effectiveness; (ii) circulation or filtration performance; (iii) equipment integrity; or (iv) bather safety.