What is a common preventive measure against fuel oil theft?

A common preventive measure against fuel oil theft is the installation of a lockable fuel tank or an alarm system. This approach creates a physical barrier, making it more difficult for unauthorized individuals to access the fuel. A lockable tank restricts access to only those with the appropriate key or combination, thus enhancing security.

In addition to physical locks, an alarm system can serve as a deterrent by providing alerts for any unauthorized access attempts. Together, these measures not only protect the fuel from theft but also help in monitoring the integrity of the storage system.

While other options may contribute to reducing the risk of theft, they do not provide the immediate and effective line of defense that a lockable tank or alarm system does. Frequent audits can help track fuel usage but may not prevent theft from occurring. Likewise, changing suppliers regularly does not inherently safeguard the fuel itself or the storage system. Furthermore, while underground storage can offer some security benefits, it is not always feasible due to installation and location considerations. Therefore, the installation of a lockable tank or alarm system stands out as a proactive and effective strategy against fuel oil theft.