Oregon Construction Contractors (CCB) Practice Test

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What is the primary function of an underground storage tank (UST)?

To store solid waste materials
To store hazardous substances and petroleum
To provide potable water supply
To manage construction debris

The correct answer is: To store hazardous substances and petroleum

The primary function of an underground storage tank (UST) is to store hazardous substances and petroleum. USTs are specifically designed to securely hold liquids, particularly those that may pose a risk to the environment if leaked. This includes fuels and other chemicals used in various industries, such as gas stations, industrial facilities, and commercial establishments. The design of USTs helps prevent contamination of groundwater and soil, which is critical given the potential environmental and health risks associated with hazardous materials. Regulatory agencies closely monitor USTs to ensure they are maintained and operated safely to mitigate any spill or leak risks. While other options involve waste management or resource storage, they do not align with the intended purpose of USTs, which are principally focused on hazardous substances and petroleum storage.