15A NCAC 02D .1204. SEWAGE SLUDGE AND SLUDGE INCINERATORS

(a)  Applicability. This Rule applies to sewage sludge and sludge incinerators.

(b)  Definitions. For the purpose of this Rule, the definitions in 40 CFR Part 503 shall apply in addition to the definitions in Rule .1202 of this Section.

(c)  Emission Standards.

(1)           The emission standards in this Paragraph apply to any incinerator subject to this Rule except where Rules .0524, .1110, or .1111 of this Subchapter applies. However when Subparagraphs (11) or (12) of this Paragraph and Rules .0524, .1110, or .1111 of this Subchapter regulate the same pollutant, the more restrictive provision for each pollutant shall apply, notwithstanding provisions of Rules .0524, .1110, or .1111 of this Subchapter to the contrary.

(2)           Particulate Matter. Any incinerator subject to this Rule shall comply with one of the following emission standards for particulate matter:

(A)          For refuse charge rates between 100 and 2000 pounds per hour, the allowable emissions rate for particulate matter from any stack or chimney of any incinerator subject to this Rule shall not exceed the level calculated with the equation E=0.002P, calculated to two significant figures, where "E" equals the allowable emission rate for particulate matter in pounds per hour and "P" equals the refuse charge rate in pounds per hour. For refuse charge rates of 0 to 100 pounds per hour the allowable emission rate is 0.2 pounds per hour. For refuse charge rates of 2000 pounds per hour or greater the allowable emission rate shall be 4.0 pounds per hour. Compliance with this Part shall be determined by averaging emissions over a block three-hour period.

(B)          Instead of meeting the standards in Part (A) of this Subparagraph, the owner or operator of any incinerator subject to this Rule may choose to limit particulate emissions from the incinerator to 0.08 grains per dry standard cubic foot corrected to 12 percent carbon dioxide. In order to choose this option, the owner or operator of the incinerator shall demonstrate that the particulate ambient air quality standards will not be violated. To correct to 12 percent carbon dioxide, the measured concentration of particulate matter is multiplied by 12 and divided by the measured percent carbon dioxide. Compliance with this Part shall be determined by averaging emissions over a block three-hour period.

(3)           Visible Emissions. Any incinerator subject to this Rule shall comply with Rule .0521 of this Subchapter for the control of visible emissions.

(4)           Sulfur Dioxide. Any incinerator subject to this Rule shall comply with Rule .0516 of this Subchapter for the control of sulfur dioxide emissions.

(5)           Odorous Emissions. Any incinerator subject to this Rule shall comply with Rule .1806 of this Subchapter for the control of odorous emissions.

(6)           Hydrogen Chloride. Any incinerator subject to this Rule shall control hydrogen chloride emissions such that they do not exceed four pounds per hour unless they are reduced by at least 90 percent by weight or to no more than 50 parts per million by volume corrected to seven percent oxygen (dry basis). Compliance with this Subparagraph shall be determined by averaging emissions over a one-hour period.

(7)           Mercury Emissions. Emissions of mercury from any incinerator subject to this Rule are regulated under 15A NCAC 02D .1110.

(8)           Beryllium Emissions. Emissions of beryllium from any incinerator subject to this Rule are regulated under 15A NCAC 02D .1110.

(9)           Lead Emissions. The daily concentration of lead in sewage sludge fed to a sewage sludge incinerator shall meet the requirements specified in 40 CFR 503.43(c).

(10)         Other Metal Emissions. The daily concentration of arsenic, cadmium, chromium, and nickel in sewage sludge fed to a sewage sludge incinerator shall meet the requirements specified in 40 CFR 503.43(d).

(11)         Toxic Emissions. The owner or operator of any incinerator subject to this Rule shall demonstrate compliance with Section .1100 of this Subchapter according to 15A NCAC 02Q .0700.

(12)         Ambient Standards.

(A)          In addition to the ambient air quality standards in Section .0400 of this Subchapter, the following ambient air quality 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 and which are increments above background concentrations, shall apply aggregately to all incinerators at a facility subject to this Rule:

(i)            arsenic and its compounds                                                2.3x10^-7

(ii)           beryllium and its compounds                            4.1x10^-6

(iii)          cadmium and its compounds                           5.5x10^-6

(iv)          chromium (VI) and its compounds                  8.3x10^-8

(B)          The owner or operator of a facility with incinerators subject to this Rule shall demonstrate compliance with the ambient standards in 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 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 subject to this Rule as their allowable emission limits unless Rules .0524, .1110, or .1111 of this Subchapter requires more restrictive rates.

(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 Rules .0524, .1110, or .1111 of this Subchapter apply.

(2)           Sewage Sludge Incinerators.

(A)          The maximum combustion temperature for a sewage sludge incinerator shall be specified as a permit condition and be based on information obtained during the performance test of the sewage sludge incinerator to determine pollutant control efficiencies as needed to comply with .1204(c).

(B)          The values for the operational parameters for the sewage sludge incinerator air pollution control device(s) shall be specified as a permit condition and be based on information obtained during the performance test of the sewage sludge incinerator to determine pollutant control efficiencies as needed to comply with .1204(c).

(C)          The monthly average concentration for total hydrocarbons, or carbon monoxide as provided in 40 CFR 503.40(c), in the exit gas from a sewage sludge incinerator stack, corrected to zero percent moisture and seven percent oxygen as specified in 40 CFR 503.44, shall not exceed 100 parts per million on a volumetric basis using the continuous emission monitor required in Part (f)(3)(A) of this Rule.

(3)           Sludge Incinerators. The combustion temperature in a sludge incinerator shall not be less than 1200^oF. The maximum oxygen content of the exit gas from a sludge incinerator stack shall be:

(A)          12 percent (dry basis) for a multiple hearth sludge incinerator;

(B)          seven percent (dry basis) for a fluidized bed sludge incinerator;

(C)          nine percent (dry basis) for an electric sludge incinerator; and

(D)          12 percent (dry basis) for a rotary kiln sludge incinerator.

(e)  Test Methods and Procedures.

(1)           The test methods and procedures described in Section .2600 of this Subchapter and in 40 CFR Part 60 Appendix A and 40 CFR Part 61 Appendix B shall be used to determine compliance with emission rates. Method 29 of 40 CFR Part 60 shall be used to determine emission rates for metals. However, Method 29 shall be used to sample for chromium (VI), and SW 846 Method 0060 shall be used for the analysis.

(2)           The Director may require the owner or operator to test his incinerator to demonstrate compliance with the emission standards listed in Paragraph (c) of this Rule.

(3)           The owner or operator of a sewage sludge incinerator shall perform testing to determine pollutant control efficiencies of any pollution control equipment and obtain information on operational parameters, including combustion temperature, to be specified as a permit condition.

(f)  Monitoring, Recordkeeping, and Reporting.

(1)           The owner or operator of an incinerator subject to the requirements of this Rule shall comply with the monitoring, recordkeeping, and reporting requirements in Section .0600 of this Subchapter.

(2)           The owner or operator of an incinerator subject to the requirements of this Rule shall maintain and operate a continuous temperature monitoring and recording device for the primary chamber and, where there is a secondary chamber, for the secondary chamber. The owner or operator of an incinerator that has installed air pollution abatement equipment to reduce emissions of hydrogen chloride shall install, operate, and maintain continuous monitoring equipment to measure pH for wet scrubber systems and rate of alkaline injection for dry scrubber systems.

(3)           In addition to the requirements of Subparagraphs (1) and (2) of this Paragraph, the owner or operator of a sewage sludge incinerator shall:

(A)          install, operate, and maintain, for each incinerator, continuous emission monitors to determine the following:

(i)            total hydrocarbon concentration of the incinerator stack exit gas according to 40 CFR 503.45(a) unless the requirements for continuously monitoring carbon monoxide as provided in 40 CFR 503.40(c) are satisfied;

(ii)           oxygen content of the incinerator stack exit gas; and

(iii)          moisture content of the incinerator stack exit gas;

(B)          monitor the concentration of beryllium and mercury from the sludge fed to the incinerator at least as frequently as required by Rule .1110 of this Subchapter but in no case less than once per year;

(C)          monitor the concentrations of arsenic, cadmium, chromium, lead, and nickel in the sewage sludge fed to the incinerator at least as frequently as required under 40 CFR 503.46(a)(2) and (3);

(D)          determine mercury emissions by use of Method 101 or 101A of 40 CFR Part 61, Appendix B, where applicable to 40 CFR 61.55(a);

(E)           maintain records of all material required under Paragraph (e) of this Rule and this Paragraph according to 40 CFR 503.47; and

(F)           for class I sludge management facilities (as defined in 40 CFR 503.9), POTWs (as defined in 40 CFR 501.2) with a design flow rate equal to or greater than one million gallons per day, and POTWs that serve a population of 10,000 people or greater, submit the information recorded in Part (D) of this Subparagraph to the Director on or before February 19 of each year.

(g)  Excess Emissions and Start-up and Shut-down. All incinerators subject to this Rule shall comply with Rule .0535, Excess Emissions Reporting and Malfunctions, of this Subchapter.

 

History Note:        Authority G.S. 143-215.3(a)(1); 143-215.107(a)(4),(5);

Eff. October 1, 1991;

Amended Eff. June 1, 2008; August 1, 2002; July 1, 2000; July 1, 1999; July 1, 1998; July 1, 1996; April 1, 1995; December 1, 1993.