Outside oil tanks shall not be installed on which type of surfaces?

The correct answer indicates that outside oil tanks should not be installed on wood or other combustible surfaces due to safety concerns. Oil tanks are typically filled with flammable liquids. If an oil tank is placed on a combustible surface, such as wood, it raises the risk of fire, especially in the event of leaks, spills, or other accidents that could ignite the oil. Using non-combustible surfaces, such as concrete or metal, helps minimize the fire hazard by providing a stable foundation that is resistant to fire and does not contribute to a potential fire scenario.

It is essential for safety regulations to address these risks, ensuring that the installation environment does not include materials that could easily catch fire and exacerbate a dangerous situation. The use of a proper base, conducive to safety standards, is critical for preventing environmental hazards and ensuring compliance with local regulations concerning oil tank installations.