The San Joaquin Valley Air Pollution Control District (SJVAPCD or the District) hosted a public workshop on July 30, 2020 to discuss proposed amendment concepts to District Rules 4306 and 4320, which regulate emissions from boilers, steam generators, and process heaters. ( public workshop slides)
The proposed amendments aim to reduce nitrogen oxide (NOX) emissions from these sources by lowering the allowable NOX concentration limit per equipment type and heat input rating. Furthermore, the proposed amendments will likely require installation of NOX control technology equipment in order to meet the proposed emission limits for applicable emission sources. The implementation schedule projects an effectiveness date by December 2023 for “dirtier” units while “cleaner” units may have an extended timeframe.
Similarly, the District is proposing to amend District Rule 4311 to reduce NOX emissions from flares. The proposed amendments to District Rule 4311 may aim to:
- Remove the non-major source exemption,
- Remove the landfill exemption,
- Lower NOX emission limits to be consistent with South Coast Air Quality Management District's flare rule, and
- Require ultra-low NOX control technology for new and existing flares depending on throughput.
The proposed amendments to District Rules 4306, 4320, and 4311 are still under development, as the District is evaluating cost and feasibility. Additionally, the District will be investigating the socioeconomic impacts associated with the proposed amendments.