Subpart FF. Underground Coal Mines

• Q686. What is the definition of facility as it relates to mines and coal mine methane energy plants?
• Q687. If all of our coal mine methane gets piped offsite to another facility, what do we need to report?
• Q688. Does the 25,000 ton CO2e per year limit (threshold) apply to the compressors individually, or in aggregate (all such compressors or equipment at the mine)?
• Q692. What is the GWP for methane that is used for this rule?
• Q693. In equation FF-1, is the value supposed to be standard cubic feet per minute, or actual cubic feet per minute?
• Q719. How do we determine if our underground coal mine is required to report its emissions to EPA?
• Q770. Do I have to keep reporting for an underground coal mine that liberates more than 36.5 million cubic feet of methane per year making it subject to subpart FF but whose total annual emissions from all sources are less than 25,000 metric tons CO2e?
• Q689. Is a "methane buster", aka "methane exhauster", (compressor that runs on some of the methane from the borehole) without a flare required to be reported under Subpart FF?
• Q690. Where do I report CO2 emissions from compressors used at the mine that run on methane?
• Q691. What is the definition of portable equipment?
• Q694. Are there any provisions for extended inaccessibility of remote sites (e.g., degasification or gob vent boreholes) due to inclement weather (e.g., deep snow) that may restrict site access for weeks or even months?
• Q756. Do I need to calculate the moisture content of the methane emitted from my coal mine?
• Q812. My facility is using MSHA data to report ventilation air methane emissions. I am having difficulty interpreting the MSHA report. Is any guidance available on how to correctly interpret MSHA data to report VAM to the GHGRP?