Final answer:
After contacting Blue Stakes, you must wait at least two full business days before starting excavation work to allow utilities to be marked and ensure safety.
Step-by-step explanation:
When planning to start any digging or excavation work, it is crucial to communicate with Blue Stakes to avoid damaging underground utilities. After contacting Blue Stakes, you must typically wait at least two full business days before beginning your proposed work. This waiting period allows utility companies sufficient time to mark the locations of any underground facilities in the work area. The precise waiting time can vary depending on state regulations, but the minimum is often set to ensure safety and prevent potential hazards associated with undiscovered utility lines.