WAC 246-290-71006. Public notice for contaminants with a SAL and other unregulated contaminants

(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 Contaminant or Group of Contaminants Public Notice Tier SAL Exceedance Based on: PFOA Tier 2 Running annual average PFOS Tier 2 Running annual average PFHxS Tier 2 Running annual average PFNA Tier 2 Running annual average HFPO-DA Tier 2 Running annual average Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA) Tier 2 Running annual average Contaminant or Group of Contaminants Public Notice Tier SAL Exceedance Based on: PFOA Tier 2 Running annual average PFOS Tier 2 Running annual average PFHxS Tier 2 Running annual average PFNA Tier 2 Running annual average HFPO-DA Tier 2 Running annual average Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA) Tier 2 Running annual average (a) The purveyor shall complete public notice for an initial exceedance of a Tier 1 designated SAL within 24 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 30 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 .