Tank tightness testing must be capable of detecting a leak rate of what amount from any portion of the tank?

The requirement for tank tightness testing to detect a leak rate of 0.1 gallons per hour is established to ensure safety and environmental protection. This standard reflects a balance between practical monitoring capabilities and the need for effective leak detection. A leak rate of 0.1 gallons per hour is considered small enough to indicate a potential issue that may not have immediate visible consequences, yet significant enough to warrant further investigation and remediation efforts.

Detecting leaks at this threshold helps prevent groundwater contamination and protects public health. Regulatory agencies require this testing to ensure operators take proactive measures to minimize leaks and spills from underground storage tanks, which can pose serious environmental risks. This standard aligns with regulations designed to enhance the integrity of tank systems and safeguard the surrounding environment. Therefore, a leak detection capability of 0.1 gallons per hour is critical for ensuring compliance and sustainability in underground storage tank operations.