What is the risk associated with flammable or combustible liquids in tank-top and dispenser sumps?

Flammable or combustible liquids in tank-top and dispenser sumps present a significant hazard, especially when they accumulate in high concentrations. Such liquids can easily ignite, leading to fires or explosions if they come into contact with an ignition source. This risk is heightened in areas where equipment may generate heat or sparks, making it crucial to manage the levels of flammable liquids effectively within these sumps.

Understanding the conditions that can lead to dangerous concentrations is essential for ensuring safety protocols are followed during the installation and retrofitting of underground storage tanks. These hazards necessitate strict adherence to safety regulations and guidelines to mitigate the risks involved and ensure the protection of personnel and property at facilities handling flammable substances.