Who does the special inspector notify when arriving on site?

The special inspector is required to notify the contractor upon arriving on site because the contractor is typically responsible for coordinating the various trades and ensuring that work is performed according to the plans and specifications. The contractor needs to be aware of the inspector's presence so they can facilitate and provide access to the areas that need to be inspected, as well as inform the inspection team of any specific concerns or areas that are being monitored during construction.

While other parties such as the building official, the owner, and the Registered Design Professional (RDP) might also need to be informed at different times about the project's progress, the immediate and critical contact at the time of arrival is the contractor. The contractor's role is to work closely with the special inspector to ensure compliance with special inspection requirements and to address any issues that arise during the inspection process.