HAR §11-20-11. (3) If a director-required confirmation sample is taken for any contaminant, then the results of the initial and confirmation sample shall be averaged

The resulting average shall be used to determine the system's compliance in accordance with subsection (i). The director has the discretion to delete results of obvious sampling errors. (g) The director may require more frequent monitoring than specified in subsections (b), (c), (d), and (e) or may require confirmation samples for positive and negative results at his or her discretion. (h) Systems may apply to the director to conduct more frequent monitoring than the minimum monitoring frequencies specified in this section. (i) Compliance with section 11-20-3 shall be determined based on the analytical result(s) obtained at each sampling point. (1) For systems which are conducting monitoring at a frequency greater than annual, compliance with the MCLs for antimony, arsenic, asbestos, barium, beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel, selenium, or thallium is determined by a running annual average at any sampling point. If the average at any sampling point is greater than the MCL, then the system is out of compliance. If any one sample would cause the annual average to exceed the MCL, then the system is out of compliance immediately. Any sample below the method detection limit shall be calculated at zero for the purpose of determining the annual average. If a system fails to collect the required number of samples, compliance (average concentration) will be based on the total number of samples collected. (2) For systems which are monitoring annually, or less frequently, the system is out of 20-67 §11-20-11 compliance with the MCLs for asbestos, antimony, arsenic, barium, beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel, selenium, or thallium if the level of a contaminant at any sampling point is greater than the MCL. If a confirmation sample is required by the director, the determination of compliance will be based on the annual average of the initial MCL exceedance and any State-required confirmation samples. If a system fails to collect the required number of samples, compliance (average concentration) will be based on the total number of samples collected. (3) Compliance with the MCLs for nitrate and nitrite is determined based on one sample if the levels of these contaminants are below the MCLs. If the levels of nitrate, nitrite, or both, exceed the MCLs in the initial sample, a confirmation sample is required in accordance with subsection (f)(2), and compliance shall be determined based on the average of the initial and confirmation samples. (4) Arsenic sampling results will be reported to the nearest 0.001 mg/L. (j) Each public water system shall monitor at the time designated by the director during each compliance period. (k) Inorganic analysis: (1) Analysis for the following contaminants shall be conducted in accordance with the methods in 40 C.F.R. §141.23(k)(1), or the alternative methods listed in Appendix A to subpart C of part 141, or their equivalent as determined by EPA. Criteria for analyzing arsenic, barium, beryllium, cadmium, calcium, chromium, copper, lead, nickel, selenium, sodium, and thallium with digestion or directly without digestion, and other analytical test procedures are 20-68 3376