The CDC recommends using dry saturated steam and entrained water for ideal steam sterilization, and requires a minimum dryness fraction of 97% (meaning a quality of 97% or higher) for compliance. Two common temperatures for steam sterilization are 121°C (250°F) and 132°C (270°F). To achieve sterilization of medical supplies in an autoclave, the CDC recommends a minimum exposure time of 30 minutes at 121°C (250°F) or 4 minutes at 132°C (270°F). What is the minimum pressure required to achieve compliance at a temperature of 132°C?