Michigan Administrative Code › Department - Environmental Quality › Air Quality Division › Part 10 - INTERMITTENT TESTING AND SAMPLING › Section R. 336.2012 - Reference test method 5C

Current through Vol. 24-12, July 15, 2024
Rule 1012. Reference test method 5C, outstack filtration
				  method, reads as follows:
(a) The
				principle, applicability, and performance test criteria are as follows:
(i) Principle. Particulate matter is
				withdrawn isokinetically from the source and collected on solid filtering media
				maintained at a temperature in the range of 120 ±14 degrees Centigrade
				(248 ±25 degrees Fahrenheit) or such other temperature as specified by
				the department's rules or a permit condition, or as approved by the department
				for a particular application. The particulate mass, which includes any material
				that condenses at or above the filtration temperature, is determined
				gravimetrically after removal of uncombined water.
(ii) Applicability. This method is applicable
				for the determination of particulate emissions from stationary sources as
				identified in table 31 of R 336.1331. The method is also applicable when
				specifically provided for in the department's rules, orders, a permit to
				install, or a permit to operate.
(iii) Performance test criteria:
(A) A performance test shall consist of a
				minimum of 3 separate samples of a specific air contaminant conducted within a
				36-hour period, unless otherwise authorized by the department. Each of the 3
				separate samples shall be obtained while the source is operating at a similar
				production level. For the purpose of determining compliance with an applicable
				emission limit, rule, or permit condition, the arithmetic mean of results of
				the 3 samples shall apply. If a sample is accidentally lost or conditions occur
				in which 1 of the 3 samples must be discontinued because of forced shutdown,
				failure of an irreplaceable portion of the sampling train, extreme
				meteorological conditions, or other circumstances beyond the owner's or
				operator's control, compliance may, upon the approval of the department, be
				determined using the arithmetic mean of the results of 2 samples.
(B) For any source that is subject to an
				emission limitation calculated to 50% excess air, the multipoint, integrated
				sampling procedure of R 336.2004(1)(c) shall be used for gas analysis. For all
				other sources that require a determination of the molecular weight of the
				exhaust, any optional sampling procedure of R 336.2004(1)(c) may be used.
				Alternatives or modifications to procedures are subject to the approval of the
				department.
(C) The minimum volume
				per sample shall be 30 cubic feet of dry gas corrected to standard conditions
				(70 degrees Fahrenheit, 29.92 inches mercury). Minimum sample time shall be 60
				minutes, which may be continuous or a combination of shorter sampling periods
				for sources that operate in a cyclic manner. Smaller sampling times or sample
				volumes, when necessitated by process variables or other factors, may be
				approved by the department.
(D) For
				any source whose emission control device alters the moisture content of the
				exhaust gas, a moisture determination shall be performed in a location upstream
				from the emission control device and in accordance with R 336.2004(1)(d) or an
				alternative method approved by the department.