What is one piece of safety equipment needed for drainage excavation besides personal protection equipment?

Gas detectors are essential safety equipment for drainage excavation because they help identify the presence of harmful gases or vapors that may be present in the soil or atmosphere during excavation work. This is particularly important in situations where there may be a risk of exposure to hazardous materials, such as in areas near sewage or where utility lines may be buried. Detecting these gases early can prevent accidents and protect workers from potentially dangerous conditions.

Other types of safety equipment, such as hard hats, safety goggles, and first aid kits, serve specific purposes in ensuring worker safety. Hard hats protect against falling debris, safety goggles shield the eyes from dust and particles, and first aid kits provide necessary supplies for addressing injuries. However, gas detectors focus directly on the identification of atmospheric hazards that may not be immediately visible or detectable without proper equipment. This makes them crucial in the context of drainage excavation.