How long must a facility keep records pertaining to GHG emissions?

Each facility and supplier must retain the following records for three years in electronic or hardcopy format:

• A list of all units, operations, processes, and activities for which the reporter calculates GHG emissions.
• Data used to calculate the GHG emissions for each unit, operation, process, and activity, categorized by fuel or material type. These data vary by source category and include, but are not limited to:
  • The GHG emission calculations and methods used.
  • Analytical results for the development of site-specific emission factors.
  • Results of all required analyses of high heat value, carbon content, or other required fuel or feedstock parameters.
  • Any facility operating data or process information used for the GHG emissions calculation.
• Annual GHG reports.
• Missing data computations. For each missing data event, also record the duration of the event, actions taken to restore malfunctioning equipment, the cause of the event, and actions taken to prevent or minimize occurrence in the future.
• A written GHG monitoring plan. The plan can rely on references to existing operating documents (e.g., standard operating procedures, other documents), providing the following elements are included and easily recognizable:
  • Identification of positions of responsibility (i.e., job titles) for collecting GHG data.
  • Explanation of processes and methods used to collect the data needed to calculate GHG emissions.
  • Description of procedures and methods used for quality assurance, maintenance, and repair of monitoring systems used to provide data for the GHG reports.
• The results of all required certification and quality assurance tests of monitoring systems used to provide data for the annual GHG report.
• Maintenance records for monitoring instrumentation.
• Any other data specified in any applicable subpart of the rule.

Facilities and suppliers can get out of annual reporting requirements:

• After 5 consecutive years of emissions below 25,000 metric tons CO₂e/year.
• After 3 consecutive years of emissions below 15,000 metric tons CO₂e/year.
• If the GHG-emitting processes or operations are shut down.