Trenching & Excavation Daily — Deep

Slope, shore, or shield in place per soil class Critical Auto-fail

Soil classified A / B / C by competent person Critical

Manufacturer / engineering tabulated data on site for shore / shield Critical

O₂ 19.5–23.5%, LEL <10%, H₂S <10 ppm tested before entry Critical

Continuous monitoring if hazardous atmosphere expected Critical

Ladder / ramp every 25 ft for 4+ ft trenches Critical Auto-fail

Ladder extends 3 ft above edge

Spoils / equipment 2+ ft from edge Critical Auto-fail

No standing water in trench or controls in place Critical

No vibration, traffic, adjacent excavation that could induce collapse

Competent person inspection signed today Critical Auto-fail