CSLB Law & Business ExamSafetyMedium
A contractor is excavating a trench and piling excavated soil (spoil) near the edge. Per Cal/OSHA regulations, spoil piles and other materials must be kept back at least how far from the edge of the excavation?
- A1 foot
- B5 feet
- C10 feet
- D2 feet
Show answer & explanationAnswer & explanation
Correct answer: D. 2 feet
Cal/OSHA requires that excavated material (spoil) and other materials or equipment be kept at least 2 feet from the edge of an excavation to prevent the material from falling or rolling into the trench and reduce the risk of collapse from added edge load.
Why the other options are wrong
- A. 1 foot does not provide an adequate safety buffer.
- B. 5 feet exceeds the regulatory minimum, though not incorrect practice, it's not the required standard.
- C. 10 feet is excessive and not the regulatory requirement.
Spoil Pile Setback
Excavated soil and materials must be set back at least 2 feet from the edge of a trench to prevent collapse and falling hazards.
- Applies to soil piles, tools, and equipment
- Prevents surcharge loading on trench walls
- Part of general Cal/OSHA excavation safety requirements
Memory trick: Two feet back keeps the spoil off your back