Section 326IAC8-19-3. Control requirements for VOC emissions from process vents

   The control requirements set forth in this rule shall apply to process vents of batch process trains and unit operations within batch process trains (batch operations) as follows:

(1) The owner or operator of a unit operation with an average flow rate, as determined in accordance with section 4(b) of this rule, below the flow rate value calculated by the applicability equations contained in section 1(e) of this rule, shall reduce uncontrolled VOC emissions from such unit operation by an overall efficiency, on average, of at least ninety percent (90%), or to twenty (20) ppmv, per batch cycle.

(2) The owner or operator of a batch process train with an average flow rate, as determined in accordance with section 4(b)(2) of this rule, below the flow rate value calculated by the applicability equations contained in section 1(e) of this rule, shall reduce uncontrolled VOC emissions from such batch process train by an overall efficiency, on average, of at least ninety percent (90%), or to twenty (20) ppmv, per batch cycle.

(3) If a boiler or process heater is used to comply with subdivision (1) or (2), the vent stream shall be introduced into the flame zone of the boiler or process heater.

(4) If a flare is used to comply with subdivision (1) or (2), the flare shall comply with the requirements of 40 CFR 60.18*.

(5) If a process, not subject to this rule, vents an emergency relief discharge into a common flare header of this flare, the requirements of 40 CFR 60.18* shall not apply during the emergency relief discharge.

  *These documents are incorporated by reference. Copies may be obtained from the Government Printing Office, 732 North Capitol Street NW, Washington D.C. or are available for review and copying at the Indiana Department of Environmental Management, Office of Air Quality, Indiana Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204. (Air Pollution Control Division; 326 IAC 8-19-3; filed Nov 3, 2009, 3:32 p.m.: 20091202-IR-326090222FRA; errata filed Nov 19, 2009, 10:03 a.m.: 20091216-IR-326090222ACA)