A pressure test of a gas line passed the required 30-minute test but showed a slow leak (10 PSI to 7.4 PSI over 26 hours), making it impossible to find the leak manually and causing concern about whet

A pressure test of a gas line passed the required 30-minute test but showed a slow leak (10 PSI to 7.4 PSI over 26 hours), making it impossible to find the leak manually and causing concern about whether to pass or reject the system.