True or False: Stiver and Mackay's Method and the US EPA Method are intended to predict the rate at which liquid evaporates from a pool near ambient temperature.

• A. True
• B. False
• C. Not stated
• D. Irrelevant

Answer: (A)

Predicting how fast a liquid evaporates from a surface is about volatilization from a liquid pool under conditions close to the surrounding environment. Stiver and Mackay's Method and the US EPA Method are designed to estimate evaporation losses from a surface pool when the liquid is near ambient temperature. They provide practical formulas that use surface area, vapor pressure, wind speed or air movement, and temperature differences to quantify how quickly liquid molecules escape into the air. These methods are used in safety and environmental assessments to predict volatilization losses for spills or surface exposures, not for boiling or high-temperature processes. Because the question centers on near-ambient conditions, these approaches are appropriate, making the statement true.