Section 326IAC7-3-2. Ambient monitoring

   (a) The source owner or operator shall install and operate continuous ambient sulfur dioxide air quality monitors and a meteorological data acquisition system according to a monitoring plan submitted to the commissioner for approval. At a minimum, the monitoring plan shall contain the following requirements:

(1) Installation and operation of one (1) or two (2) air quality monitors and one (1) meteorological instrumentation system capable of measuring wind speed and wind direction at a height of at least ten (10) meters above grade. The monitor shall be located in areas of expected maximum ambient concentration as determined by methods acceptable to the commissioner.

(2) Reporting of the air quality and meteorological data in a format specified by the commissioner within ninety (90) days after the end of each calendar quarter.

(3) Operation of the air quality monitor and meteorological instrumentation in accordance with a quality assurance program specified by the commissioner.

  (b) A monitoring plan shall be submitted to the department prior to October 1, 1991. The commissioner may require that the monitoring plan be modified, at any time, consistent with the requirements of this section.

  (c) Source owners or operators subject to the requirements of this rule, located in the same county, may submit a joint monitoring plan to satisfy the requirements of this rule. The joint monitoring plan shall specify the responsible owner or operator for each requirement in subsection (a). Upon approval by the commissioner, the joint monitoring plan may contain fewer than two (2) air quality monitors and one (1) meteorological station per owner or operator.

  (d) A source owner or operator may petition the commissioner for an administrative waiver of all or some of the requirements of this section if such owner or operator can demonstrate that ambient monitoring is unnecessary to determine continued maintenance of the sulfur dioxide ambient air quality standards in the vicinity of the source. The demonstration shall address uncertainties in any air quality dispersion models used in the demonstration and shall address the adequacy of any existing monitoring data to characterize the worst-case ambient concentrations in the vicinity of the source. A waiver shall be effective upon written approval by the commissioner. The commissioner may establish conditions in the approval of a waiver to assure compliance with the provisions of this article. Failure to continuously meet the requirements for obtaining a waiver or failure to comply with any condition contained in the approval of a waiver shall render void any waiver issued. (Air Pollution Control Division; 326 IAC 7-3-2; filed Aug 28, 1990, 4:50 p.m.: 14 IR 53)