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PROPOSED RULES

applies. 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 applicable emissions level contained in concentration in:

(i)table Table 3 of 40 CFR 60.34b(a) for large municipal waste combustors. to Subpart Cb of Part 60 "Municipal Waste Combustor Operating Guidelines." The municipal waste combustor technology named in this table is defined in 40 CFR 60.51b; and

(ii)table 5 of 40 CFR 60 Subpart BBBB. 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 (four-hour block average). 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 combustor operating temperature at which the combustor operates measured at each the particulate matter control device inlet shall not exceed 63 degrees F above the maximum demonstrated particulate matter control device temperature (four-hour block average). 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. test and shall evaluate total carbon usage for each calendar quarter. The total amount of carbon purchased and delivered to the municipal waste combustor shall be at or above the required quarterly usage of carbon and shall be calculated as specified in equation four or five in 40 CFR 60.1935(f).

(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:

(i)the annual tests for dioxins and furans;

(ii)the annual mercury tests for carbon feed requirements only;

(iii)the two weeks preceding the annual tests for dioxins and furans; and

(iv)the two weeks preceding the annual mercury tests (for carbon feed rate requirements only). only); and

(v)any activities to improve the performance of the municipal waste combustor or its emission control including performance evaluations and diagnostic or new technology testing.

(F)The Director shall exempt the owner or operator of a municipal waste combustor from limits on load level, temperature at the inlet of the particular matter control device, and carbon feed rate when the Director approves test activities to:

(i)evaluate system performance,

(ii)test new technology or control technology,

(iii)perform diagnostic testing;

(iv)perform other activities to improve the performance; or

(v)perform other activities to advance the state of the art for emissions controls.

(3)Except during start-up where the procedure has been approved according to Rule .0535(g) of this Subchapter, waste material shall not be loaded into any incinerator subject to this Rule when the temperature is below the minimum required temperature. Start-up procedures may be determined on a case-by-case basis according to Rule .0535(g) of this Subchapter and Subparagraph (4) of this Paragraph. Incinerators subject to this Rule shall have automatic auxiliary burners that are capable of maintaining the required minimum temperature in the secondary chamber excluding the heat content of the wastes.
(3)(4)The operational standards of this Paragraph apply at all times except during periods of municipal waste combustor startup, shutdown, or malfunction that last no more than than:

(A)        three hours for Class I combustors; or

(B)three hours, hours except as specified in 60.58b(a)(1)(iii) for large municipal waste combustors. with the following exception: For the purpose of compliance with the carbon monoxide emission limits in Subparagraph (2) of this Paragraph, if a loss of boiler water level control (e.g., boiler waterwall tube failure) or a loss of combustion air control (e.g., loss of combustion air fan, induced draft fan, combustion grate bar failure) is determined to be a malfunction according to 15A NCAC 02D .0536, the duration of the malfunction period is limited to 15 hours per occurrence. During such periods of malfunction, monitoring data shall be dismissed or excluded from compliance calculations, but

22:23                                                               NORTH CAROLINA REGISTER                                           JUNE 2, 2008

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