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Regulations & Plans Under Development



The Division of Air Quality is committed to openness and transparency as it updates and amends state Air Quality Regulations and related state implementation plans. This page provides information on items under development.

Requirements for the Phase-out of Hydrofluorocarbons

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Ajo Rabemiarisoa
Division of Air Quality
302.739.9402

The Division of Air Quality is developing regulations for the use and manufacturing of Hydrofluorocarbons (HFCs), as directed by Governor John Carney and supported by House Concurrent Resolution 60, passed by the Delaware General Assembly on June 30, 2019.

Hydrofluorocarbons (HFCs) are used as replacements for ozone-depleting substances in air-conditioning, refrigeration, foam-blowing, solvents, and aerosols. Emissions of HFCs are growing at a rate of eight percent per year. This regulation will address the critical need to phase-out the use of HFCs, which are high global warming potential (GWP) gases that are hundreds to thousands of times more potent than carbon dioxide (CO2) in contributing to climate change per unit of mass.

A court ruling has limited the U.S. EPA’s ability to require replacement of HFCs under the Significant New Alternatives Policy (SNAP) rules. Although legal actions have been initiated to defend the SNAP rules in court, state action is required to maintain the HFC prohibitions schedule, in line with the vacated SNAP rules.

Refrigerants with lower global warming potential are available at equivalent cost. They are commonly used in stationary refrigeration and air-conditioning equipment. The industry was already working to comply with EPA replacement regulations and generally supports uniform nationwide rules.

This regulation development process started with DNREC Start Action Notice 2019-08.

Amendments to the Control of Volatile Organic Compound Emissions (Solvent Cleaning)

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Renae Held
Division of Air Quality
302.739.9402

The Division of Air Quality is amending Section 33.0 (Solvent Cleaning and Drying) of the Control of Volatile Organic Compound Emissions Regulations (7 DE Admin. Code 1124).

Solvent cleaning is the process of using solvents to remove contaminants from various plastic, metal or other substrates (surfaces). The following businesses may use solvent cleaning and drying in their operations: vehicle sales and servicing locations; machine shops; and manufacturers and servicers of electronic, pharmaceutical, aerospace, and other mobile equipment.

The objective of these amendments is to adopt certain provisions from the Ozone Transport Commission 2012 model rule for solvent degreasing. These amendments will reduce emissions of volatile organic compounds from solvent cleaning operations.

This regulatory amendment process started with DNREC Start Action Notice 2019-05.

Amendments to the Control of Volatile Organic Compound Emissions (Vapor Recovery)

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Frank Gao
Division of Air Quality
302.739.9402

Review Committee Meetings Background and Draft Language Reference Materials

The Division of Air Quality is amending Sections 26.0 and 36.0 of the Control of Volatile Organic Compound Emissions Regulations (7 DE Admin. Code 1124).

Section 26.0 regulates “Gasoline Dispensing Facility Stage I Vapor Recovery.” It is commonly referred to in Delaware as The Stage I Rule.

Section 36.0 regulates “Vapor Emission Control at Gasoline Dispensing Facilities” and is commonly referred to as The Stage II rule.

The objectives of the amendments are (1) to phase out Stage II vapor recovery systems at Delaware gasoline dispensing facilities (GDFs), and (2) to set up effective controls on vapor emission from GDFs’ gasoline underground storage tanks (USTs) after phasing out Stage II systems.

This regulatory amendment process started with DNREC Start Action Notice 2018-07.




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