What is the required minimum distance that excavated soil must be placed from the edge of a trench according to Cal/OSHA?
Correct Answer
B) 2 feet
Cal/OSHA requires excavated materials to be placed at least 2 feet from the edge of excavations to prevent cave-ins due to surcharge loading.
Why This Is the Correct Answer
Option B is correct. Cal/OSHA Title 8 Section 1541.1 requires that excavated or other materials be stored and kept at least 2 feet from the edge of an excavation. This setback prevents surcharge loading from destabilizing trench walls and causing cave-ins.
Why the Other Options Are Wrong
Option A: 4 feet
Option A (4 feet) exceeds the required minimum. While greater distances are always safer, Cal/OSHA specifies 2 feet as the minimum standard. Selecting 4 feet confuses this rule with other setback requirements or is an overestimate.
Option C: 3 feet
Option C (3 feet) is not the Cal/OSHA standard. The codified minimum is 2 feet. This distractor may appeal to candidates who recall a number between 2 and 4 feet without pinning down the exact regulation.
Option D: 1 foot
Option D (1 foot) is insufficient and unsafe. Soil piled only 1 foot from the trench edge can exert enough surcharge pressure to destabilize the trench wall. Cal/OSHA sets 2 feet as the minimum safe distance.
Memory Technique
Picture a 2-foot wide safety zone — like two shoe lengths — between the soil pile and the trench edge. '2 feet for safety on the trench street.'
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