326 IAC 10-7-4 RACT requirements and limitations for emissions of NOx from affected sources in Lake County and Porter County

Sec. 4. (a) Owners or operators of small boilers shall: (1) annually perform a tune-up; and (2) maintain a logbook in a format approved by the department that includes the following information: (A) The date of the last tune-up. (B) The name, title, and affiliation of the person who performed the tune-up and made any adjustments. (C) Any other information which the department may require as a condition of approval of any permit for the boiler. (b) Owners or operators of mid-size, large, and very large boilers shall not emit NOx in excess of the following: (1) 0.08 lb/mmBtu for gas-only fueled boilers. (2) 0.10 lb/mmBtu for distillate oil fueled boilers. (3) 0.20 lb/mmBtu for residual oil fueled boilers. (c) Unless a more stringent limit is included in a permit, owners or operators of stationary combustion turbines for mechanical drive and electrical generation shall not emit NOx in excess of the following: Table 1 – NOx Emissions Limitations for Stationary Combustion Turbines Combustion turbine type Combustion turbine heat input at peak load (HHV) NOX emission standard Turbine firing natural gas > 50 and ≤ 850 mmBtu/hr 25.0 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MW-hr) > 850 mmBtu/hr 25.0 ppm at 15 percent O2 or 54 ng/J of useful output (0.43 lb/MW-hr) (d) Unless a more stringent limit is included in a permit, owners or operators of stationary internal combustion engines shall not emit NOx in excess of the following: Table 2 – NOx Emissions Limitations for Stationary RICE Ignition System Maximum Engine Power (kW [hp]) NOx (g/kW-hr [g/hp-hr]) Compression Ignition 373 < kW ≤ 560 [500 < hp ≤ 751] 0.40 [0.30] kW > 560 [hp > 751] generator sets 0.67 [0.50] kW > 560 [hp > 751] All except generator sets 3.5 [2.61] Spark Ignition 373 < kW [500 < hp] 2.7 [2.0] (e) Unless a more stringent limit is included in a permit, owners or operators of reheat, annealing, and galvanizing furnaces with a maximum heat input capacity of equal or greater than seventy-five (75) mmBtu/hr shall not emit NOx in excess of 0.09 lb/mmBtu.