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The Ventura County Air Pollution Control District (VCAPCD) is proposing revisions to Rule 74.15.1 Boilers, Steam Generators, and Process Heaters, in order to reduce Oxides of Nitrogen (NOx) emissions to help attain the state ambient ozone air quality standards. This rule applies to boilers, steam generators, and process heaters with a rated heat input capacity below 5 million BTUs per hour and greater than or equal to 1 million BTUs per hour.

The proposed changes to this rule include more strict NOx emission limits of 12 ppm for natural gas fired units using atmospheric combustion and 9 ppm for all other natural gas fired units. Atmospheric combustion includes units using a non-sealed combustion chamber where natural draft is used to exhaust gases. These lower limits will only apply to new or replaced boilers, steam generators and process heaters with ratings between 2 and 5 million BTUs per hour and the limitations will become effective January 1, 2016. The lower NOx limit has the potential to affect approximately 44 existing emission units within VCAPCD jurisdiction upon replacement.

The rule revision includes new emission screening deadlines and additional methods for submitting notifications to VCAPCD. An alternative test method has also been added, which allows the use of South Coast Air Quality Management District’s Compliance Protocol, found here. Additional exemptions have been updated to include units fired by landfill gas, biogas, or liquefied petroleum gas, and certain portable combustion equipment. Staff is also proposing to update the definition of process heater to exclude certain combustion equipment. Click here to see the list of potential exempt equipment.

VCAPCD will be holding a public consultation meeting regarding the proposed revisions to this rule on February 12, 2015 at 10 am. For more information regarding future compliance with this rule and the public consultation meeting, please contact our office at (949) 567-9880 or click here for more information.