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65  subgrade preparation for interior and exterior concrete slabs-on-grade;  flexible (asphalt concrete) and rigid (concrete) pavement sections;  2019 and 2022 California Building Code (CBC) site class and design spectral response acceleration parameters; and  construction considerations. The geotechnical report (p. 14) concludes: “We conclude that from a geotechnical engineering standpoint, the site can be developed as planned, provided the recommendations presented in the attached report are incorporated into the project plans and specifications and implemented during construction.” The current geotechnical report prepared for the project component, including any subsequent revisions, and any subsequent detailed excavation, earthwork, and foundation plans are subject to City review and approval. In collaboration with a California Registered Geotechnical Engineer, the appropriate City staff would also observe onsite construction work. These conclusions are consistent with the California Building Code (CBC), the California Historical Building Code (CHBC), and both the DTPP program EIR (Chapter 16, Geology and Soils) and the DTPP Plan-Wide Amendments program SEIR (Chapter 16, Geology and Soils). The Commercial Component would not create new impacts or increase impacts, and there is no new information of substantial importance for CEQA purposes. iv) The Commercial Component site is relatively flat; no impacts from landslides are anticipated. The Downtown Precise Plan program EIR concluded that while the DTPP area could be subject to moderate to high susceptibility to ground shaking and liquefaction, the City’s standard grading and building permit regulations provide reasonable assurances that individual projects would incorporate the design and engineering refinements necessary to reduce the potential impact of DTPP-facilitated development to less than significant, requiring no additional mitigation. The DTPP Plan-Wide Amendments program SEIR affirmed this conclusion. The site-specific geotechnical report prepared for the Commercial Component, and any subsequent revisions, is subject to City review and approval, consistent with the CBC and/or CHBC, and both the DTPP program EIR (Chapter 16, Mitigation Measure 16-1) and the DTPP Plan-Wide Amendments program SEIR (Chapter 16, Geology and Soils) findings. Because the Commercial Component would have a less-than-significant impact with compliance with the regulatory framework and incorporation of standard project conditions, this component would be consistent with the analysis within the DTPP EIR and Plan-Wide Amendments SEIR. The Commercial Component would not create new impacts or increase impacts and there is no new information of substantial importance for CEQA purposes. b. The DTPP EIR found that the DTPP would create a potentially significant impact as it relates to erosion and sedimentation due to the ground disturbance associated with future developments, requiring mitigation. DTPP EIR Mitigation Measure 16-3 was identified to reduce this impact to a less-than-significant level by requiring the preparation of an erosion control plan for all future developments involving grading 10,000 square feet or more, consistent with the state Construction General Permit and its required SWPPP. The DTPP Plan-Wide Amendments program SEIR (pp. 16-10 and 16-11) concurred with the DTPP EIR conclusion and includes Mitigation Measure GEO-2, which restates Mitigation Measure 16-3 from the DTPP Final EIR with minor text revisions (“clarifying amendments”). This mitigation measure, which shall be required as a condition of approval for the Commercial Component, shall be implemented during construction and would reduce the potentially significant impacts on soil erosion and sedimentation to a less-than-significant level. The Commercial Component will be subject to DTPP program EIR Mitigation Measure 16-3, which shall be required as a condition of approval. Mitigation Measure 16-3 requires the applicant to prepare an erosion control plan subject to City approval and consistent with the required San Mateo County Stormwater Pollution Prevention Plan (SWPPP) Best Management Practices. As a result, the proposed Commercial Component would have a less-than-significant impact. The Commercial Component would not create new impacts or increase impacts and there is no new information of substantial importance for CEQA purposes. c. The DTPP Final EIR concluded that the risks associated with unstable geologic units or soil are low, but that effects of strong seismic ground shaking and liquefaction would present a potentially significant impact. The DTPP Plan- Wide Amendments program SEIR concluded that complying with the regulatory framework would ensure that new structures would not be susceptible to the effects of unstable geologic units and soils, so the impacts would be less than significant. No changes to geologic substructures are expected to occur as a result of Commercial Component implementation. As described in item (a) above, the proposed Commercial component would comply with all applicable local and State codes and regulations, and this component design would incorporate City-approved geotechnical recommendations ATTY/RESO.0031/CC RESO CEQA GUIDELINES (901 EL CAMINO REAL) REV: 04-22-25 VR Page 65 of 148