A gas is liquified by refrigeration and stored at atmospheric pressure. The model assumes that the liquid is released at its normal boiling point. This is considered a/an ______ release.

• A. Realistic
• B. Conservative
• C. Worst-case
• D. Extreme

Answer: (A)

Realistic releases reflect conditions that could actually occur during normal operations. When a liquefied gas stored at atmospheric pressure is released and assumed to vaporize at its normal boiling point, you’re modeling a scenario that aligns with how the substance behaves under typical storage and release conditions. The liquid will boil and become vapor at the boiling point as soon as it’s released, producing a vapor cloud that matches what could happen in a normal leak. This isn’t an exaggerated or overly conservative situation, nor a deliberately extreme or worst-case one. Therefore, this is a realistic release.