NR 106.90(4)(g)(g) For any other facility not listed in pars. (a) to (f), evaluate the feasibility of replacing or upgrading equipment and processes, and the use of alternative softening technologies to affect chloride reductions. NR 106.90(5)(5) Source reduction reporting. Following the completion of tier 1, 2 or 3 source reduction activities specified in the permit, but no later than 6 months prior to permit expiration, the permittee shall file a written report to the department documenting the current reduction as well as the anticipated future reduction in salt usage and chloride effluent concentrations. NR 106.90 HistoryHistory: Cr. Register, January, 2000, No. 529, eff. 2-1-00. NR 106.91NR 106.91 Variances for POTWs which accept wastewater from public water systems treating water to meet primary safe drinking water act standards. Publicly owned treatment works that accept wastewater from a public water system treating water to meet the primary maximum contaminant levels specified in ch. NR 809, if not able to meet the calculated limitation, may apply to the department for a variance from the water quality standard used to derive the limitation following the procedure specified in this subchapter. The department shall seek U.S. environmental protection agency approval before a variance is included in a permit. Upon approval, the permittee may be given an interim limitation, a target value, a target limitation and appropriate source reduction requirements, under s. NR 106.83 in the permit upon permit reissuance or modification. No calculated limitation, interim limitation, target value, target limitation, or source reduction requirement shall interfere with the attainment of the primary maximum contaminant levels specified in ch. NR 809. NR 106.92NR 106.92 Authority of a publicly owned treatment works to regulate chloride discharges. A publicly owned treatment works has the authority to regulate the discharge of chloride as enumerated in s. NR 211.40. NR 106.92 HistoryHistory: Cr. Register, January, 2000, No. 529, eff. 2-1-00. NR 106.93NR 106.93 New discharges. Any point source which has not been authorized under a WPDES permit prior to February 1, 2000, shall be required to meet the calculated limitations. Relocation of an existing discharge which was issued a WPDES permit prior to February 1, 2000, may not be considered a new discharge. NR 106.93 HistoryHistory: Cr. Register, January, 2000, No. 529, eff. 2-1-00. NR 106.94NR 106.94 Relocation of an existing discharge. An existing discharge which was issued a WPDES permit prior to February 1, 2000, and which is relocated after February 1, 2000, may be subject to voluntary source reduction activities and both an interim limitation and a target value or an interim limitation and a target limitation pursuant to s. NR 106.83 if the provisions of ch. NR 207 are met. Relocation includes the diversion of a discharge from a land treatment system to a surface water. NR 106.94 HistoryHistory: Cr. Register, January, 2000, No. 529, eff. 2-1-00. NR 106.95NR 106.95 Multiple discharges. The provisions of s. NR 106.11 are applicable to multiple discharges of chloride. NR 106.95 HistoryHistory: Cr. Register, January, 2000, No. 529, eff. 2-1-00. NR 106.96NR 106.96 Analytical methods and laboratory requirements. The provisions of s. NR 106.14 regarding analytical methods, sample handling and laboratory requirements are applicable to discharges of chloride. NR 106.96 HistoryHistory: Cr. Register, January, 2000, No. 529, eff. 2-1-00. NR 106.97NR 106.97 Purpose. The purpose of this subchapter is to specify how the department will regulate the discharge of PFOS and PFOA in wastewater to surface waters of the state that are subject to the PFOS and PFOA standards under s. NR 102.04 (8) (d) 1. pursuant to the permitting program under ch. 283, Stats. NR 106.97 HistoryHistory: CR 21-083: cr. Register July 2022 No. 799, eff. 8-1-22. NR 106.975NR 106.975 Definitions. In this subchapter: NR 106.975(2)(2) “Equipment blank” means a sample collected by passing laboratory-verified PFAS-free water over or through field sampling equipment before the collection of field samples to evaluate potential contamination from the equipment used during sampling. NR 106.975(4)(4) “Major municipal discharger” means a treatment works or system that has a major municipal discharge as defined in s. NR 200.02 (7). NR 106.975(5)(5) “Minor municipal discharger” means a treatment works or system that has a minor municipal discharge as defined in s. NR 200.02 (8). NR 106.975(6)(6) “Municipal discharger” means all publicly operated treatment works and privately owned domestic sewage treatment works subject to the requirements under ch. NR 210. NR 106.975(7)(7) “New discharger” means any building, structure, facility, or installation from which there is or may be a discharge of pollutants, that is not a new source, and that did not commence the discharge of pollutants at a particular site prior to August 1, 2022, and which has never received a finally effective WPDES permit for discharges at that site. NR 106.975(9)(9) “PFAS” means a perfluoroalkyl or polyfluoroalkyl substance that contains a straight or branching chain of carbon atoms in which one or more of the carbon atoms have fluorine atoms attached at all bonding sites not occupied by another carbon atom and the fluorinated part of the molecule can be expressed as CnF2n+1.