CSLB C-36 Plumbing ContractorSafetyEasy
A plumbing contractor is overseeing an excavation for a new sewer line. The trench is 6 feet deep and 4 feet wide. What is the minimum distance that excavated material (spoil pile) must be kept from the edge of the trench according to Cal/OSHA regulations?
- A4 feet
- B1 foot
- C3 feet
- D2 feet
Show answer & explanationAnswer & explanation
Correct answer: D. 2 feet
Cal/OSHA regulations require that excavated material be placed at least 2 feet from the edge of an excavation to prevent it from falling back into the trench and to maintain the stability of the trench walls.
Why the other options are wrong
- A. Four feet provides ample safety, but it is not the minimum required distance, and might be impractical in some situations.
- B. One foot is insufficient and does not meet Cal/OSHA safety standards for spoil pile placement.
- C. While a greater distance provides more safety, 3 feet is not the minimum required distance by regulation.
Spoil Pile Setback
The minimum safe distance excavated material (spoil pile) must be kept from the edge of a trench or excavation.
- Prevents material from falling back into the trench.
- Maintains stability of trench walls.
- Cal/OSHA requires a minimum of 2 feet.
Memory trick: Two feet keeps the dirt from tumbling in, ensuring the worker's safety within.