I have notified the contractors working in the area of the noise ordinance. As Adam had mentioned in the comments, City Code does allow for setting up/staging outside of the hours- this can result in vehicle noises and backup alarms.

Michael - Can you reach out to the contractor and let them know of this section of City code? 14.09.040 - Exemptions. The following uses and activities shall be exempt from the provisions of this chapter: (a)Nonamplified crowd noises resulting from legal activities, between the hours of six a.m. and ten p.m.;(b)Construction operations for which building permits have been issued or construction operations for which a permit is not required shall be exempt from the noise control ordinance under the following conditions and with the following exceptions:(1)Such operations that occur after six a.m. and before ten p.m., except on Sundays and holidays, as defined in Section 14.09.020. However, in recognition of the work necessary to prepare and close a site each day, motor vehicles transporting heavy construction equipment or construction materials to and from construction sites at those times shall be exempt from the time restrictions set forth above.(2)Because of the loud and unusual sounds, and the ground vibrations associated with pile drivers, steam shovels, pneumatic hammers, and steam or diesel gasoline hoists, the operation of this equipment shall be exempt but only when it occurs between the hours of seven a.m. and eight p.m. or when allowed by special permit.(3)In order to be exempt, all equipment used in such operations shall be operated with the manufacturer's mufflers and noise reducing equipment in use and in proper operating condition;