Utah Admin. Code R392-303-6 - Geothermal Source Water Quality

(1) The operator shall:

(a) install a tap or sampling point to sample the geothermal source water before it enters the geothermal pool or geothermal bathing place impoundment;

(b) collect a sample of the geothermal source water and any other water source used to fill the pool that is not approved for drinking water by Utah Department of Environmental Quality, Division of Drinking Water; and

(c) collect a sample of water directly from the geothermal pool or geothermal bathing place according to the following conditions if it is impractical to directly sample the geothermal source water:

(i) at least 16 hours have passed since a bather has been in the geothermal pool or geothermal bathing place; and

(ii) the sample is taken as close to the geothermal source water inlet as practical;

(d) submit the samples for analysis to a laboratory certified under Rule R444-14, Certification of Environmental Laboratories;

(e) have laboratory analysis performed initially and each five-year time period thereafter to determine the levels of constituents listed in Table 1; and

(f) ensure the sample collection and analysis frequency is as follows:

(i) the initial source water analysis report is submitted to the local health department prior to obtaining a permit to operate; and

(ii) submit five-year samples to the local health department within six-months prior to the end of the five-year period.

(2) If the geothermal source water analysis report required in Subsection (1)(e) indicates that a contaminant or constituent fails any of the standards in Table 1, the operator shall either:

(a) discontinue use of the source water;

(b) implement an ongoing treatment process approved by the local health officer to provide source water that meets the requirements in Table 1; or

(c) post a caution sign with the requirements outlined in Subsection R392-303-29(1)(a) and Subsection R392-303-29(4).

(3) The local health officer may require the operator to post signs in addition to those described in Section R392-303-29 and Section R392-303-31 including:

(a) the maximum recommended bathing period; or

(b) other technically based recommended restrictions.

TABLE 1

Geothermal Source Water Contaminants and Constituents

Contaminant	Maximum Contaminant Level
1. Fluoride	4.0 mg/L
2. Nitrate	10 mg/L
3. Nitrite	1 mg/L
4. Antimony	0.006 mg/L
5. Arsenic	0.010 mg/L
6. Barium	2 mg/L
7. Beryllium	0.004 mg/L
8. Cadmium	0.005 mg/L
9. Chromium	0.1 mg/L
10. Copper	1.3 mg/L
11. Cyanide, as free cyanide	0.2 mg/L
12. Lead	0.015 mg/L
13. Mercury	0.002 mg/L
14. Selenium	0.05 mg/L
15. Thallium	0.002 mg/L

Constituent	Maximum	Minimum
pH	8.0	7.0

Notes

Utah Admin. Code R392-303-6

Amended by Utah State Bulletin Number 2022-02, effective 1/3/2022