Before opening an excavation, what must be done regarding underground installations?
Correct Answer
D) Determine the estimated location of utilities and protect or support them as needed.
OSHA requires estimated locations of underground installations to be determined before excavation starts.
Why This Is the Correct Answer
OSHA requires estimated locations of underground installations to be determined before excavation starts.
Why the Other Options Are Wrong
Option A: Base the underground utility locate response on memory only
The trap in A is Rely only on memory. That selection is wrong because it leaves the work at an informal or incomplete stage, while Underground utility locate requires Determine the estimated location of utilities and protect or support them as needed.; Underground utility locations are determined before excavation.
Option B: The site crew should cut all lines to verify depth
Choice B gives Cut all lines to verify depth. Its specific error: it answers the Underground utility locate prompt with the wrong practical move.
Option C: The site crew should wait until backfill to call utilities
Choice C (Wait until backfill to call utilities) is rejected because the action skips the timing, documentation, or field-control step needed for Underground utility locate.
Memory Technique
Make underground utility locate a tabbed card: cite the exact condition, then choose Determine the estimated location of utilities and protect or support them as needed.
Reference Hint
Open OSHA 29 CFR 1926 Subpart P; EPA Construction General Permit concepts where applicable; use OSHA 1926.651(b) to confirm that OSHA requires estimated locations of underground installations to be determined before excavation starts.
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