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What percentage of a tank must a secondary containment system contain if only one tank is located in containment?

  1. 50

  2. 100

  3. 150

  4. 200

The correct answer is: 100

The correct percentage for a secondary containment system to contain, when only one tank is located within that containment, is 100%. This requirement is in place to ensure that the containment system can hold the entire volume of the regulated tank in the event of a leak or spill. Secondary containment systems are critical for preventing environmental contamination, especially in industries dealing with hazardous materials. The rationale behind requiring the containment to hold 100% of the tank's volume is to ensure that no release of product can escape into the environment. This level of containment provides the necessary safety margin to effectively protect the surrounding area and groundwater from potential exposure. The selection of 100% aligns with the regulatory requirements established by various environmental protection agencies, emphasizing the importance of safety and environmental protection. It is also designed to accommodate the full capacity of the primary containment, which safeguards against accidental releases and promotes responsible management of hazardous substances.