What is an opening allowing fumes to escape?

Unplanned emissions of fumes are called fugitive emissions. They can be released from:

• uncontrolled ventilation (no treatment),
  
• leaking equipment
  
• poorly maintained seals,
  
• holes in equipment,
  
• staff work arounds which are not approved,
  
• pressure relief valves,
  
• unlit flares,
  
• open doors and Windows
  
• product wetted walls of floating roof tanks
• open ponds and treatment systems