Safety, Tools, and Jobsite Practices
Trenching and excavations
Nevada OSHA follows federal OSHA 1926. A protective system, meaning sloping, shoring, or shielding, is required at 5 feet deep or more, with a competent person inspecting daily. Spoil, tools, and materials stay at least 2 feet back from the edge. A ladder is required in trenches 4 feet or deeper, placed so a worker travels no more than 25 feet to reach it. Never enter an unprotected excavation to fix a broken line; that is exactly when cave-ins happen.
Hot work and tools
- Get a hot-work permit where required, keep an extinguisher within reach, and maintain a fire watch after soldering.
- Purge and test fuel piping before work; never use a torch to search for a leak.
- Use the right tool: a soil pipe cutter rather than a saw on cast iron, a torque wrench on gas unions, eye protection for cutting and hammering.
- Grinders need guards and face shields; soldering needs ventilation and lead-free materials.
Electrical and confined spaces
Use GFCI-protected cords, keep cords out of standing water, and lock out equipment before service. Vaults, septic tanks, and grease interceptors can hold hydrogen sulfide or an oxygen-deficient atmosphere; test the air before entry and use an attendant plus retrieval system.
Worked example
A crew replaces a sewer line in a 6-foot trench with vertical walls and spoil piled 1 foot from the edge. Two violations: no protective system at 6 feet, and spoil inside the 2-foot setback. The fix is shoring plus moving the spoil before anyone enters.
Traps that cost marks
Treating a shallow-looking trench as exempt, skipping the air test in a vault, and assuming the extinguisher is someone else responsibility.