Before any ground disturbance is initiated on a construction site in Ontario, what is the mandatory minimum notice period for requesting utility locates through Ontario One Call?

Question: Before any ground disturbance is initiated on a construction site in Ontario, what is the mandatory minimum notice period for requesting utility locates through Ontario One Call?

Answer options: ✅ At least 5 business days, excluding the day of excavation

• At least 3 business days, including the day of excavation
• At least 24 hours, excluding weekends
• At least 48 hours, including statutory holidays

Correct answer: At least 5 business days, excluding the day of excavation

Explanation: According to Ontario Regulation 213/91 (Construction Projects), section 228 (1), a person shall not excavate or dig for the purpose of a ground disturbance unless at least 5 business days' notice of the excavation or digging has been provided to the operators of underground infrastructure.