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PROPOSED RULES

mass dioxins and furans), corrected to seven percent oxygen for facilities that employ an electrostatic precipitator-based emission control system, or

(B)do not employ an electrostatic precipitator-based emission control system, shall not exceed 30 nanograms per dry standard cubic meter (total mass) (total mass dioxins and furans). corrected to seven percent oxygen for facilities that do not employ an electrostatic precipitator-based emission control system.

Compliance with this Subparagraph shall be determined by averaging emissions over three test runs with a minimum four hour run duration, performed in accordance with Reference Method 23 of 40 CFR Part 60 Appendix A-7,  and corrected to seven percent oxygen.

(12)Fugitive Ash.

(A)On or after the date on which the initial performance test is completed, no owner or operator of a municipal waste combustor shall cause to be discharged to the atmosphere visible emissions of combustion ash from an ash conveying system (including conveyor transfer points) in excess of five percent of the observation period (i.e., nine minutes per three-hour block period), as determined by visible emission observations using EPA Reference Method Reference Method 22 of 40 CFR 60 Appendix A-7, observations as specified in 40 CFR 60.58b(k), except as provided in Part (B) of this Subparagraph. Compliance with this Part shall be determined from at least three one-hour observation periods when the facility transfers fugitive ash from the municipal waste combustion unit to the area where the fugitive ash is stored or loaded into containers or trucks.

(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 according to 15A NCAC
02Q .0700.
(14)Ambient Standards.

(A)In addition to the ambient air quality standards in Section .0400 of this Subchapter, the following are annual average ambient air quality standards standards, which are an annual average, in milligrams per cubic meter at 77 degrees F (25 degrees C) and 29.92 inches (760 mm) of mercury pressure: pressure, and which are increments above background concentrations, shall apply aggregately to all incinerators at a facility subject to this Rule:

(i)arsenic and its compounds2.3x10-7 2.3x10-7,

(ii)beryllium and its compounds4.1x10-6 4.1x10-6,

(iii)cadmium and its compounds5.5x10-6 5.5x10-6, and

(iv)chromium (VI) and its compounds8.3x10-8 8.3x10-8.

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 Subparts (i) through (iv) 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 (12) (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

22:23                                                               NORTH CAROLINA REGISTER                                           JUNE 2, 2008

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