(1) The purveyor shall provide public notice to the water system users when the department determines that a contaminant exceeds a SAL listed in WAC 246-290-315, Table 9.

(2) The public notice must be in conformance with the requirements under WAC 246-290-71001 through 246-290-71004 and based upon the public notice tier designation of the contaminant or group of contaminants in Table 17 of this section.

TABLE 17

PUBLIC NOTICE TIER DESIGNATION FOR CONTAMINANTS WITH A SAL

(a) The purveyor shall complete public notice for an initial exceedance of a Tier 1 designated SAL within twenty-four hours of confirmation, and for every subsequent quarter in which analytical results exceed a SAL.

(b) The purveyor shall complete public notification for an initial exceedance of a Tier 2 designated SAL as soon as practical, but no less than within thirty days of exceeding the SAL per Table 9 in WAC 246-290-315, and every three months thereafter as long as the results continue to exceed the SAL per Table 9 in WAC 246-290-315, or as directed by the department.

(3) The department may require public notice for other unregulated contaminants that are reported per requirements in WAC 246-390-075.