Is it permissible to have LP and Natural Gas in the same building?

In Massachusetts, it is permissible to have both LP (liquefied petroleum) gas and natural gas in the same building, but it requires permission from the appropriate regulatory authority, typically the local board of health or building department. This requirement is in place due to safety and regulatory standards that govern the installation and use of different types of gas systems within a building.

The key reason for needing permission is to ensure that proper safety measures are in place, such as ventilation, proper separation of systems, and adherence to local codes. Additionally, this permission ensures that the systems are designed and installed by qualified professionals who understand the intricacies of working with different types of gases, minimizing risks such as leaks or fires.

The other options do not accommodate the necessary safety protocols required by law. The ability to have both types of gas present without permission, not ever allowing it, or permitting it only in separate units does not align with the regulatory framework intended to safeguard public safety in construction and fuel gas systems. Proper oversight is essential, which is why the correct answer includes the necessity for permission from the board.