California UST System Operator Test 2025 – 400 Free Practice Questions to Pass the Exam

Overfill equipment is designed to prevent the spilling or overfilling of underground storage tank (UST) systems during fuel deliveries. In California, regulations stipulate the parameters within which overfill equipment must be present based on the volume of fuel deliveries. Since the question specifically addresses UST systems that receive deliveries of less than 100 gallons, the correct stance is that overfill equipment is not required, as the risk and likelihood of overfilling incidents significantly diminish with such small deliveries.

While larger quantities pose a greater risk, the regulations acknowledge that smaller deliveries inherently carry a reduced risk profile, thus negating the necessity for overfill equipment in those cases. This aligns with the overarching regulatory approach to minimize unnecessary expenditures while maintaining safety and compliance for UST systems.

In contrast, local regulations may differ and could impose more stringent requirements, but at the state level, the general guideline is clearly established. Therefore, the conclusion that overfill equipment is not mandated for deliveries under 100 gallons is consistent with regulatory intent.