Which scenario would be considered a de minimis release?

• A. Catastrophic equipment failure
• B. Accidental release with timely repair
• C. Release when disconnecting low loss fittings
• D. Routine venting during maintenance

Answer: (A)

A de minimis release is a very small amount of refrigerant that escapes during normal operation or servicing and is treated as negligible for regulatory purposes. The scenario of releasing refrigerant when disconnecting low-loss fittings fits this idea because those fittings are designed to minimize leakage, so any release that occurs is typically tiny and considered de minimis.

In contrast, a catastrophic equipment failure would cause a large, significant release, not something exempt from regulation. An accidental release even if repaired quickly is still a release event that exceeds the minimal threshold. Routine venting during maintenance is intentional venting and is not treated as de minimis because it involves deliberate release of refrigerant.