What type of hazards are present when working near gas lines?

When working near gas lines, both fire hazards and explosive hazards are critical considerations due to the nature of gas and its properties. Gas, particularly natural gas and propane, is highly flammable and can ignite if exposed to a spark or heat source, leading to intense fires. Additionally, gas can accumulate in confined spaces, creating an explosive atmosphere that can detonate if ignited.

Fire hazards arise from the potential for gas to ignite, which can cause serious injuries, property damage, and even fatalities if proper precautions are not taken. Similarly, explosive hazards are a significant risk because, if a gas leak occurs, the concentration of gas in an enclosed area can reach levels that are within the explosive range, especially in the presence of an ignition source.

Other options, like focusing solely on fire or electrical hazards, do not capture the full spectrum of dangers posed by gas lines. While electrical hazards can present additional risks in environments with gas lines, they are not the primary concern when discussing the direct hazards associated with gas itself. Therefore, recognizing both fire and explosive hazards together provides a comprehensive understanding of the risks involved in working near gas lines.