CSLB C-27 Landscaping ContractorSafetyMedium
A landscaping crew is manually excavating a trench for a retaining wall. The trench is currently 4 feet deep and 3 feet wide. According to Cal/OSHA standards for excavation safety, what is the minimum distance from the trench edge that excavated soil (spoil pile) should be kept?
- AAt least 3 feet
- BAt least 1 foot
- CAt least 2 feet
- DAt least 4 feet
Show answer & explanationAnswer & explanation
Correct answer: C. At least 2 feet
Cal/OSHA regulations (Title 8, Section 1541.1(j)(1)) require that spoil piles and other materials be kept at least 2 feet from the edge of excavations to prevent them from falling back into the trench and to maintain stability of the trench wall.
Why the other options are wrong
- A. 3 feet is more than required but not the exact minimum standard.
- B. 1 foot is insufficient and does not meet Cal/OSHA minimum requirements for spoil pile setback.
- D. 4 feet is also more than required and not the exact minimum standard, indicating a lack of precise knowledge of the regulation.
Spoil Pile Setback
The minimum safe distance excavated material must be kept from the edge of a trench or excavation.
- Prevents material from falling back into the trench.
- Reduces surcharge load on trench walls, preventing collapse.
- Cal/OSHA requires a minimum of 2 feet.
Memory trick: Two feet away, keep spoil at bay!