California ICC UST Inspector Practice Exam

If different substances are stored in the same tank and have fire or explosion risks, what is required?

1. Separation in primary containment

2. Approval from a local agency

3. Letter from the manufacturer

4. Separation in both primary and secondary containment

The correct answer is: Separation in primary containment

The requirement for separation in primary containment when different substances with fire or explosion risks are stored in the same tank is based on safety protocols designed to minimize hazards associated with chemical storage. Primary containment refers to the actual tank or vessel that holds the substance. By ensuring that different substances are stored separately in their primary containment, the risk of reaction or dangerous incidents caused by mixing incompatible materials is significantly reduced. This approach is crucial as it helps to prevent potential fires or explosions, which could result from the interaction of stored substances. Regulatory agencies emphasize the importance of this practice to maintain safety standards and protect both personnel and the environment. While other choices, such as approval from a local agency, may be important in certain contexts, they do not address the immediate risk associated with storing incompatible substances together. Similarly, obtaining letters from manufacturers or ensuring separation in both primary and secondary containment may be relevant but are not the most direct solution to the specific issue of fire or explosion risks when different substances are involved. Therefore, separating these substances in primary containment is the most effective and required measure to enhance safety.