Oregon Administrative Rules › Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY › Division 228 - REQUIREMENTS FOR FUEL BURNING EQUIPMENT AND FUEL SULFUR CONTENT › Section 340-228-0606 - Hg Emission Standards

Current through Register Vol. 63, No. 7, July 1, 2024
(1)
			 Mercury emission standards. On and after July 1, 2012 or at commencement of
			 commercial operation, whichever is later, except as allowed under section (2)
			 of this rule, each coal-fired electric utility steam generating unit must
			 achieve at least 90 percent mercury capture or limit mercury emissions to 0.60
			 pounds per trillion BTU of heat input.
(2) Compliance extension. Up to a 2-year
			 extension may be granted by DEQ if the owner or operator of a coal-fired
			 electric utility steam generating unit demonstrates that it is not practical to
			 install mercury control equipment by July 1, 2012 due to supply limitations,
			 ESP fly ash contamination, or other extenuating circumstances that are beyond
			 the control of the owner or operator.
(3) Compliance demonstration. Commencing in
			 July 2013 or 12 months after commercial startup or 12 months after expiration
			 of the extension granted under section (2) of this rule, whichever is later,
			 each coal-fired electric utility steam generating unit must thereafter
			 demonstrate compliance with one of the standards in subsections (3)(a) or
			 (3)(b) of this rule for each compliance period, except as allowed under
			 sections (4) and (5) of this rule. A compliance period consists of twelve
			 months. Each month commencing with June 2013 or the twelfth month after
			 commencement of commercial operation or twelfth month after expiration of the
			 extension granted under section (2) of this rule, whichever is later, is the
			 end of a compliance period consisting of that month and the previous 11 months.
(a) A mercury emission standard of 0.60
			 pounds per trillion BTU of heat input calculated by dividing the Hg mass
			 emissions determined using a mercury CEMS or sorbent trap monitoring system by
			 heat input; or
(b) A minimum 90
			 percent capture of inlet mercury determined as follows:
(A) Inlet mercury must be determined as
			 specified in subparagraph (3)(b)(A)(i) or (3)(b)(A)(ii) of this rule:
(i) Coal sampling and analysis. To
			 demonstrate compliance by coal sampling and analysis, the owner or operator of
			 a coal-fired electric utility steam generating unit must test its coal for
			 mercury consistent with a coal sampling and analysis plan. The coal sampling
			 and analysis plan must be consistent with the requirements of OAR
			 340-228-0639.
(ii) Hg mass emissions prior to any control
			 device(s). To demonstrate compliance by measuring Hg mass emissions, the owner
			 or operator of a coal-fired electric utility steam generating unit must measure
			 mercury emissions prior to any control device(s) using a Hg CEMS or sorbent
			 trap.
(B) The mercury
			 capture efficiency must be calculated using the Hg emissions determined using a
			 mercury CEMS or sorbent trap monitoring system and the inlet mercury determined
			 using the coal mercury content data obtained in accordance with subparagraph
			 (3)(b)(A)(i) of this rule or the measured inlet mercury data obtained in
			 accordance with subparagraph (3)(b)(A)(ii) of this rule and a calculation
			 methodology approved by DEQ.