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PROPOSED RULES

(B)The emission limit specified in Part (A) of this Subparagraph covers visible emissions discharged to the atmosphere from buildings or enclosures, not the visible emissions discharged inside of the building or enclosures, of ash conveying systems.

(13)Toxic Emissions. The owner or operator of a municipal waste combustor shall demonstrate compliance with Section .1100 of this Subchapter in accordance with 15A NCAC 02Q .0700.
(14)Ambient Standards.

(A)In addition to the ambient air quality standards in Section .0400 of this Subchapter, the following annual average ambient air quality standards in milligrams per cubic meter (77 degrees Fahrenheit, 25 degrees Celsius, and 29.92 inches, 760 millimeters of mercury pressure):

arsenic and its compounds2.3x10-7

beryllium and its compounds4.1x10-6

cadmium and its compounds5.5x10-6

chromium (VI) and its compounds8.3x10-8

These are increments above background concentrations and shall apply aggregately to all incinerators at a facility subject to this Rule.

(B)The owner or operator of a facility with incinerators subject to this Rule shall demonstrate compliance with the ambient standards of Part (A) of this Subparagraph by following the procedures set out in Rule .1106 of this Subchapter. Modeling demonstrations shall comply with the good engineering practice stack height requirements of Rule .0533 of this Subchapter.

(C)The emission rates computed or used under Part (B) of this Subparagraph that demonstrate compliance with the ambient standards under Part (A) of this Subparagraph shall be specified as a permit condition for the facility with incinerators as their allowable emission limits unless Rule .0524, .1110, or .1111 of this Subchapter requires more restrictive rates.

(15)The emission standards of Subparagraphs (1) through (14) of this Paragraph shall apply at all times except during periods of municipal waste combustion unit startup, shutdown, or malfunction that last no more than three hours.
(d)  Operational Standards.
(1)The operational standards in this Rule do not apply to any incinerator subject to this Rule
when applicable operational standards in Rule .0524, .1110, or .1111 of this Subchapter apply.
(2)Each municipal waste combustor shall meet the following operational standards:

(A)The concentration of carbon monoxide at the municipal waste combustor outlet shall not exceed the concentration in table 5 of 40 CFR Part 60, Subpart BBBB for each municipal waste combustor. The municipal waste combustor technology named in this table is defined in 40 CFR 60.1940.

(B)The load level shall not exceed 110 percent of the maximum demonstrated municipal waste combustor unit load determined from the highest four-hour block arithmetic average achieved during four consecutive hours in the course of the most recent dioxins and furans stack test that demonstrates compliance with the emission limits of Paragraph (c) of this Rule.

(C)The temperature at which the combustor operates measured at the particulate matter control device inlet shall not exceed 63 degrees F above the maximum demonstrated particulate matter control device temperature determined from the highest four-hour block arithmetic average measured at the inlet of the particulate matter control device during four consecutive hours in the course of the most recent dioxins and furans stack test that demonstrates compliance with the emission limits of Paragraph (c) of this Rule.

(D)The owner or operator of a municipal waste combustor with activated carbon control system to control dioxins and furans or mercury emissions shall maintain an eight-hour block average carbon feed rate at or above the highest average level established during the most recent dioxins and furans or mercury test.  

(E)The owner or operator of a municipal waste combustor shall be exempted from limits on load level, temperature at the inlet of the particular matter control device, and carbon feed rate during the annual tests for dioxins and furans, the annual mercury tests (for carbon feed requirements only), the two weeks preceding the annual tests for dioxins

22:23                                                               NORTH CAROLINA REGISTER                                           JUNE 2, 2008

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