True or False: The One Call System notifies all contractors about proposed excavation sites.

The One Call System is designed primarily to notify utility companies about planned excavations, ensuring that underground utilities are marked and protected before any digging takes place. It does not automatically notify all contractors about excavation sites, as it is focused on safety and preventing damage to utility lines. The intention of the system is to inform utility operators so they can mark their service lines in the area, not to disseminate information to every contractor or unrelated party involved in the region. Therefore, stating that the One Call System notifies all contractors about proposed excavation sites is not accurate, which supports the conclusion that the correct answer is false.