Where a container is to be abandoned underground, as much liquid LP-gas as possible shall be what?

When a container is abandoned underground, it is crucial for safety reasons to ensure that as much liquid LP-gas as possible is removed. This practice helps to prevent potential hazards such as leaks, explosions, or environmental contamination. Vapor remnants can still pose risks, but the focus is on eliminating the more hazardous liquid form that could remain in the container.

Removing the liquid not only mitigates the risk of a dangerous buildup of pressure within the container over time but also ensures that any remaining gas does not escape into the surrounding soil or groundwater, which could create environmental issues. Proper procedures for removing remaining liquid LP-gas align with safety regulations and standards designed to protect both individuals and the environment from the dangers associated with abandoned gas containers.

Storing the liquid, leaving it intact, or neutralizing are not methods that adequately address the risks involved in leaving a container with liquid LP-gas underground. These options do not contribute to the overall safety and proper management of propane containers that are no longer in use.