09.05.2023 Reso 0091 PC23-20 PC Reso 800 Main Hotel Sequoia

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ATTY/RESO.0091/PC RESO 800 MAIN HOTEL SEQUOIA REV: 09-01-23 VR Page 26 of 32 shall be submitted to the Community Development and Transportation Department for review and approval before the issuance of any building permit. [COA][MMRP] e. Vibration Reduction (formerly FEIR Mitigation 11-3, SEIR Mitigation NO-3): The City shall reduce ground-borne vibration levels that may be generated by future site-specific demolition and construction activities by imposing conditions of approval on all future projects involving demolition and construction activities, which conditions shall require the Project Applicant to ensure the following ground-borne vibration abatement measures are implemented by the construction contractor: • Restrict vibration-generating activity to between the hours of 7:00 AM and 5:00 PM, Monday through Friday except when authorized by the Building Official (Redwood City Municipal Code Section 24.32). • Notify occupants of land uses located within 200 feet of pile-driving activities of the project construction schedule in writing. • Investigate in consultation with City staff possible pre-drilling of pile holes as a means of minimizing the number of percussions required to seat the pile. • Conduct a pre-construction site survey documenting the condition of any historic structure located within 200 feet of pile driving activities. • Monitor pile driving vibration levels to ensure vibration does not exceed appropriate thresholds for the building (5 mm/sec (0.20 inches/sec) ppv for structurally sound buildings and 2 mm/sec (0.08 inches/sec) ppv for historic buildings. [COA][MMRP] f. Best Management Practices for Construction Dust Suppression (SEIR Mitigation Measure AQ-2a): All subsequent projects, regardless of size, shall implement best management practices to reduce construction impacts, particularly fugitive dust, to a less-than significant level. Specifically, the project applicant shall require all construction plans to specify implementation of the following best management practices: • All exposed surfaces (e.g., parking areas, staging areas, soil piles, graded areas, and unpaved access roads) shall be watered two times per day. • All haul trucks transporting soil, sand, or other loose material off-site shall be covered. • All visible mud or dirt track-out onto adjacent public roads shall be removed using wet power vacuum street sweepers at least once per day. The use of dry power sweeping is prohibited.