EPA recently released its final amendments to the National Emission Standards for Hazardous Air Pollutants from Petroleum Refineries (40 CFR 63, Subpart CC). EPA is required to review the developments in practices, processed, and control technologies every eight years and update national emissions standards to address the "residual risk" after implementation of the original standards.
The updated NESHAP includes new requirements for storage vessels. All Group 1 external floating roof (EFR) storage tanks will be required to install controls for guide poles and other openings, and additional inspection, recordkeeping, and reporting requirements.
Heat exchange systems will be required to conduct monthly sampling and analyses for VOC in the cooling water. The amendments to Refinery MACT will require the repair of leaks in heat exchangers within 45 days of the sampling event in which the leak is detected, unless a delay in repair is allowed.
All Group 1 storage vessels and heat exchange systems at existing refineries must be in compliance within 36 months after the Final Amendments are published in the Federal Register.
EPA opted not to promulgate changes to Refinery MACT that would include performance standards and monitoring requirements for enhanced biological units to treat wastewater streams.
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