7 Del. Admin. Code § 1112-3.0

Current through Register Vol. 28, No. 1, July 1, 2024

Section 1112-3.0 - Standards

3.1 Except as set forth in 5.0 and 6.0 of this regulation, after May 31, 1995, no owner or operator of a major NO_x emitting source subject to the provisions of this regulation shall cause to be discharged into the atmosphere any emission of nitrogen oxides without using reasonably available control technology.

3.2 Maximum allowable emission rates of nitrogen oxides from fuel burning equipment with a rated heat input capacity of 100 MMBTU/hour or greater shall be established as follows:

3.2.1 Existing fuel burning equipment shall be presumed to meet the definition of reasonably available control technology if the owner or operator demonstrates to the satisfaction of the Department that the emission levels in Table 3-1 of this regulation can be met.

TABLE 3-1

Pounds NO_x Per Million BTU Heat Input

		Firing Type
Fuel Type	Face* and Tangential	Cyclone	Stokers
Gas Only	0.20	N/A	N/A
Oil or Gas or Both	0.25	0.43	N/A
Coal (Dry Bottom)	0.38	N/A	0.40

* Includes wall, opposed, and vertical firing methods.

3.2.2 If the owner or operator does not make the demonstration described in 3.2.1 of this regulation, RACT shall be installed with the goal of achieving the presumptive emission limits as set forth in Table 3-1 of this regulation. RACT for this category of equipment will consist of combustion modification technology including either:

3.2.2.1 low NO_x burner technology with low excess air and including Over Fire Air if technically feasible; or

3.2.2.2 flue gas recirculation with low excess air. If actual achievable emission levels following installation of such combustion modification technology are greater than the presumptive emission limits in Table 3-1 of this regulation, these actual emission levels will become RACT for those sources.

3.2.3 If the owner or operator does not comply with 3.2.1 or 3.2.2 of this regulation, alternative NO_x control technology and emission limitation proposals shall be required and approved by the Department in accordance with 5.0 of this regulation.

3.2.4 Compliance with the emission levels as determined above is based upon 24 hour rolling averaging period as follows:

3.2.4.1 For fuel burning equipment with a rated heat input of 250 MMBTU/hr or greater Continuous Emission Monitoring Systems (CEMS) approved by the Department will be used.

3.2.4.2 For fuel burning equipment with a rated heat input of 150 MMBTU/hr or greater but less than 250 MMBTU/hr compliance will be based on:

3.2.4.2.1 a CEMS approved by the Department; or

3.2.4.2.2 at the sources' request, an enhanced monitoring program approved by the Department. This enhanced monitoring program will identify and correlate various operating parameters with NO_x emission levels through source testing. These parameters will be used as surrogates to monitor NO_x emissions. Periodic source testing will be required to verify the validity of these surrogate parameters.

3.2.4.3 For fuel burning equipment with a rated heat input of 100 MMBTU/hr or greater but less that 150 MMBTU/hr compliance will be based on either 3.2.4.2.1 or 3.2.4.2.2 of this regulation or at the source's request by a periodic source testing program approved by the Department.

3.3 Maximum emission rates for nitrogen oxides from fuel burning equipment with a rated heat input capacity of less than 100 MMBTU/hr shall be as follows:

3.3.1 50 MMBTU/hr or greater: Shall not exceed those achieved by installation of either low excess air and low NO_x burner technology or flue gas recirculation technology, or equivalent NO_x control technology proposals approved by the Department in accordance with 5.0 of this regulation.

3.3.2 Less than 50 MMBTU/hr: Shall not exceed those achieved through an annual tune up performed by qualified personnel. The owner or operator shall maintain a log of the tune ups performed on each unit.

3.4 Maximum emission rate for nitrogen oxides from stationary internal combustion engines shall not exceed those achieved using pre-ignition chamber combustion or clean burn technology for gas fired units and those achieved using lean burn technology for diesel fired units. Equivalent NO_x control technology proposals may be approved by the Department in accordance with 5.0 of this regulation.

3.5 Maximum allowable emission rates of nitrogen oxides from gas turbines are as follows:

TABLE 3-2

Parts Per Million Corrected to 15% O₂

Fuel Type	Simple of Combined Cycle
Gas	42
Liquid	88

NOTE 1: Compliance with the limits is based upon a one-hour averaging period using CEMS or an alternative method approved by the Department and EPA.

An equivalent NO_x control technology and emission limitation proposals may be approved by the Department in accordance with 5.0 of this regulation.

3.6 For sources who desire to switch to a lower NO_x emitting fuel, the practice of seasonal fuel switching shall be considered RACT and the requirements of 3.2.1 through 3.2.3 and 3.3 of this regulation shall not apply. Sources that would otherwise be subject to 3.2.1 though 3.2.3 of this regulation shall monitor their emissions in accordance with 3.2.4.1 through 3.2.4.3 of this regulation for compliance with the limits established in the Permit. Seasonal fuel switching is defined as the utilization (90% availability) of a single fuel during the summer ozone season (April 1 through October 31) that inherently produces considerably lower NO_x emissions than would be otherwise emitted. Fuel switching is limited to the use of natural gas, liquid petroleum gas (LPG), or distillate oil.

3.7 Except as set forth in 5.0 and 6.0 of this regulation for sources subject to the provisions of 3.2, 3.3, 3.4, 3.5 or 3.6 of this regulation, the owner or operator shall, by not later than November 15, 1993:

3.7.1 Notify the Department of their applicability status, and

3.7.2 Submit a schedule acceptable to the Department for achieving compliance with the standard as expeditiously as possible but not later than May 31, 1995, including interim dates for issuance of purchase orders, start and completion of modifications, and the completion of compliance testing.

3.8 Except as set forth in 5.0 and 6.0 of this regulation for major NO_x emitting sources not subject to the provisions of 3.2, 3.3, 3.4, 3.5, or 3.6 of this regulation, the owner and operator shall, by not later than November 15, 1993:

3.8.1 Notify the Department of their applicability status, and

3.8.2 Submit a determination as to what constitutes reasonably available control technology for the source including technical and economic support documentation, and

3.8.3 Provide a schedule, acceptable to the Department, for implementing the RACT program as expeditiously as possible, but not later than May 31, 1995, including interim dates for the issuance of purchase orders, start and completion of modifications, and completion of compliance testing.

3.9 Any emission limits or other requirements necessary to define and enforce reasonably available control technology for applicable source types under this regulation, shall be made state and federal enforceable by a permit issued in accordance with 7 DE Admin. Code 1102.

11/24/1993

7 Del. Admin. Code § 1112-3.0