Which factor must be analyzed when planning for excavation safety?

When planning for excavation safety, analyzing soil saturation levels is crucial because the condition of the soil directly affects the stability and safety of the excavation. Soil that is overly saturated can lead to a higher risk of collapse or landslide, as it may not provide adequate support for the walls of the excavation site. Understanding the soil’s moisture content helps in designing appropriate shoring and bracing systems, allowing workers to operate safely in and around trench or excavation sites. Proper assessment of soil saturation can also inform decisions about drainage requirements or the use of various excavation techniques, which are essential for minimizing hazards and ensuring the integrity of the site throughout the duration of the project.