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What type of storage tanks does the monitoring program apply to?

  1. All underground storage tanks

  2. Underground storage tanks installed before January 1, 1984

  3. New underground storage tanks only

  4. Above-ground storage tanks

The correct answer is: Underground storage tanks installed before January 1, 1984

The monitoring program specifically targets underground storage tanks that were installed before January 1, 1984. This focus stems from regulatory concerns surrounding older tanks, which may not have the modern technologies or safety features required to prevent leaks and environmental contamination. Tanks installed prior to this date are likely to be less compliant with current safety standards, making them a priority for monitoring efforts. In contrast, newer tanks typically adhere to more stringent construction and safety guidelines, meaning they are generally less of a concern when it comes to leaks or contamination. Therefore, the monitoring program's emphasis on the older installations allows for better management of potential environmental risks associated with aging infrastructure. The other options either include tanks that do not fall under the monitoring scope (such as new and above-ground tanks) or imply a broader scope (all underground tanks) that would not align with the focused approach to older tank installations and their specific risks.