# 7 Del. Admin. Code § 1109: 7 DE Admin. Code 1109. Emissions of Sulfur Compounds From Industrial Operations > Delaware · Regulations · In force URL: https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1109 ## Section - **Citation:** 7 Del. Admin. Code § 1109 - **Heading:** 7 DE Admin. Code 1109. Emissions of Sulfur Compounds From Industrial Operations - **Jurisdiction:** Delaware - **Kind:** Regulations - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** Delaware Administrative Code / Title 7 Natural Resources and Environmental Control / 1100 Division of Air Quality / 7 DE Admin. Code 1109 ## Text Production Rate (Tons per Day) | Mass Emission Rate (Pounds per Hour) 100 | 75 300 | 210 500 | 345 700 | 480 900 | 615 1,100 | 750 1,300 | 885 1,500 | 1020 Production Rate (Tons per Day) | Mass Emission Rate (Pounds per Hour) 50 | 425 100 | 550 200 | 800 300 | 1,050 400 | 1,300 500 | 1,550 600 | 1,800 700 | 2,050 800 | 2,300 900 | 2,550 1,000 | 2,300 1.0 General Provisions 1.1 The emission of sulfur dioxide from process operations shall be controlled to a limit that shall meet the ambient air quality requirements. 1.2 For all tables in this regulation, unless otherwise indicated, the emission limitation for a production rate between any 2 consecutive production rates shall be determined by linear interpolation. 1.3 For all tables in this regulation, unless otherwise indicated, the emission limitation for a production rate above the maximum production rate or below the minimum production rate shall be determined by linear extrapolation. 28 DE Reg. 591 (02/01/25) 2.0 Restrictions on Sulfuric Acid Manufacturing Operations 2.1 No person shall cause or allow the emission of sulfur dioxide in the tail gases from any existing sulfuric acid manufacturing operation to exceed either a concentration of 1,000 parts per million by volume or a mass emission rate as specified in Table 2-1 of this regulation. 2.2 No person shall cause to be discharged into the atmosphere from any existing sulfuric acid plant any gases which contain acid mist, expressed as H 2 SO 4 , in excess of 0.25 g per kg of acid produced (0.5 lb per ton) the product being expressed as 100% H 2 SO 4 . 2.3 The provisions of subsection 2.2 of this regulation shall not apply to acid plants used as sulfur dioxide control systems, to chamber process plants, to acid concentrators or to petroleum storage and transfer facilities. 2.4 The reference methods used to determine compliance with standards prescribed in subsection 2.2 of this regulation shall be those set forth in 1.5 of 7 DE Admin. Code 1120 . 28 DE Reg visions of subsection 2.2 of this regulation shall not apply to acid plants used as sulfur dioxide control systems, to chamber process plants, to acid concentrators or to petroleum storage and transfer facilities. 2.4 The reference methods used to determine compliance with standards prescribed in subsection 2.2 of this regulation shall be those set forth in 1.5 of 7 DE Admin. Code 1120 . 28 DE Reg. 591 (02/01/25) 3.0 Restriction on Sulfur Recovery Operations 3.1 No person shall cause or allow the emission of sulfur dioxide in the tail gases from existing sulfur recovery operations to exceed either a concentration of 2,000 parts per million by volume or a mass emission rate as specified in Table 3-1 of this regulation. ALLOWABLE MASS EMISSION RATE OF SULFUR DIOXIDE FROM SULFUR RECOVERY OPERATIONS 3.2 Except as provided in Section 11.0 of 7 DE Admin. Code 1120 , NEW SOURCE PERFORMANCE STANDARDS, no person shall cause or allow the emission of sulfur dioxide in the tail gases from new sulfur recovery operations to exceed either a concentration of 2,000 parts per million by volume or a mass emission rate as specified in Table 3-1 of this regulation. 28 DE Reg. 591 (02/01/25) 4.0 Stack Height Requirements Minimum stack heights for new sources of sulfur dioxide will be determined by the Department on an individual basis. Such stack height requirements will be based on considerations such as, but not limited to, existing ambient levels of sulfur dioxide, local sources, atmospheric dispersion calculations, land use, and population density. The provisions of 7 DE Admin. Code 1127 shall apply to these calculations. 12 DE Reg. 347 (09/01/08) 28 DE Reg. 591 (02/01/25) ## Nearby sections - [7 Del. Admin. Code § 1101 7 DE Admin. Code 1101. Definitions and Administrative Principles](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1101.md) - [7 Del. Admin. Code § 1102 7 DE Admin. Code 1102. Permits](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1102.md) - [7 Del. Admin. Code § 1103 7 DE Admin. Code 1103. Ambient Air Quality Standards](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1103.md) - [7 Del. Admin. Code § 1104 7 DE Admin. Code 1104. Particulate Emissions from Fuel Burning Equipment](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1104.md) - [7 Del. Admin. Code § 1105 7 DE Admin. Code 1105. Particulate Emissions from Industrial Process Operations](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1105.md) - [7 Del. Admin. Code § 1106 7 DE Admin. Code 1106. Particulate Emissions From Construction And Materials Handling](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1106.md) - [7 Del. Admin. Code § 1107 7 DE Admin. Code 1107. Emissions From Incineration of Noninfectious Waste](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1107.md) - [7 Del. Admin. Code § 1108 7 DE Admin. Code 1108. Sulfur Dioxide Emissions from Fuel Burning Equipment](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1108.md) - [7 Del. Admin. Code § 1109 7 DE Admin. Code 1109. Emissions of Sulfur Compounds From Industrial Operations](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1109.md) - [7 Del. Admin. Code § 1110 7 DE Admin. Code 1110. Control of Sulfur Dioxide Emissions - Kent and Sussex Counties](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1110.md) - [7 Del. Admin. Code § 1111 7 DE Admin. Code 1111. Carbon Monoxide Emissions From Industrial Process Operations New Castle County](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1111.md) - [7 Del. Admin. Code § 1112 7 DE Admin. Code 1112. Control of Nitrogen Oxides Emissions](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1112.md) - [7 Del. Admin. Code § 1113 7 DE Admin. Code 1113. Open Burning](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1113.md) - [7 Del. Admin. Code § 1114 7 DE Admin. Code 1114. Visible Emissions](https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1114.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_1109. Check the current official text before relying on it. Not legal advice.