Indiana Administrative Code › Title 326 - AIR POLLUTION CONTROL DIVISION › Article 3 - MONITORING REQUIREMENTS › Rule 7 - Fuel Sampling and Analysis Procedures › Section 7-3 - Alternative coal sampling and analysis methods

Current through July 10, 2024
Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11
Affected: IC 13-14-4-3; IC 13-15; IC 13-17
Sec. 3.
(a) As an
				alternative to the coal sampling and analysis procedures in section 2 of this
				rule, a source owner or operator may use manual or other non-ASTM automatic
				sampling and analysis procedures upon a demonstration as described in
				subsection (b), submitted to and approved by the department and U.S. EPA that
				the procedures provide sulfur dioxide emission estimates representative either
				of estimates based on coal sampling and analysis procedures specified in
				section 2 of this rule or of continuous emissions monitoring.
(b) For the demonstration described in this
				section, a source owner or operator may submit documentation of procedures and
				results of a stopped-belt bias test or other comparisons between a sampling
				system meeting the requirements of section 2 of this rule and those methods and
				procedures proposed by the source owner or operator. A stopped-belt bias test
				and a sampling system meeting the requirements of section 2 of this rule shall
				be considered reference method systems. A comparison shall utilize a series of
				at least twenty-five (25) reference method system samples paired with
				nonreference method system samples and analyzed for the percent of sulfur
				content to determine the presence of significant systemic error. The detection
				of significant systemic error shall be based on the application of a
				statistical test (t-test) to determine if there is a difference between the
				reference and nonreference systems at the ninety-five percent (95%) confidence
				level, according to the following formula:
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Where: t = Calculated t value.
d = Average difference between paired data.
Sd = Standard deviation of the differences.
N = Number of paired data sets.
The calculated t value is compared to the t value in the
				  standard statistical t tables at the ninety-five percent (95%) probability and
				  the appropriate degrees of freedom (n - 1). If the calculated t value is
				  greater than or equal to the value of t in the t table, then the systems are
				  not comparable. Certain coals with low variability may detect a small bias,
				  which may be acceptable as decided on a case-by-case basis. This method tests
				  for positive and negative bias. Provisions for testing only for a negative bias
				  that would cause a source owner or operator to report less than actual values
				  may be acceptable if supported by statistical tests. Upon request, the
				  department shall provide written guidance to a source owner or operator as to
				  the procedures to be followed in conducting this comparison.
(c) The demonstration described in this
				section shall be repeated upon any significant change to the coal sampling
				procedures or upon notification by the department that a new demonstration is
				necessary. If the department has reason to doubt that the alternative sampling
				and analysis procedures are comparable to methods and procedures provided in
				section 2 of this rule, based on:
(1)
				inspections;
(2)
				monitoring;
(3) quality assurance
				data; or
(4) other information;
the department may notify the owner or operator that the
				  demonstration shall be repeated. Written notification by the department of the
				  request shall be made to the source owner or operator allowing at least sixty
				  (60) days to schedule the demonstration.