NR 273.013 HistoryHistory: Cr. Register, September, 1990, No. 417, eff. 10-1-90. NR 273.014NR 273.014 New source performance standards. Any new source subject to this subchapter shall achieve the following standards: NR 273.014 HistoryHistory: Cr. Register, September, 1990, No. 417, eff. 10-1-90. NR 273.015NR 273.015 Pretreatment standards for existing sources. Except as provided in ss. NR 211.13 and 211.14, any existing source subject to this subchapter which introduces pollutants into a POTW shall comply with ch. NR 211 and achieve the limitations set forth in s. NR 273.013. NR 273.015 HistoryHistory: Cr. Register, September, 1990, No. 417, eff. 10-1-90. NR 273.016NR 273.016 Pretreatment standards for new sources. Except as provided in s. NR 211.13, any new source subject to this subchapter which introduces pollutants into a POTW shall comply with ch. NR 211 and achieve the limitations set forth in s. NR 273.013. NR 273.016 HistoryHistory: Cr. Register, September, 1990, No. 417, eff. 10-1-90. NR 273.02NR 273.02 Applicability; description of the magnesium subcategory. This subchapter applies to the discharge of pollutants to waters of the state and the introduction of pollutants into POTWs from magnesium forming.