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<br />City’s grading permit and building permit regulations, an individual development project cannot be given final
<br />approval without project component compliance with geotechnical/geologic requirements. These requirements and
<br />related City inspection and verification procedures before project occupancy provide reasonable assurances that the
<br />project component will incorporate the design and engineering refinements necessary.
<br />A site-specific geotechnical report for the proposed Housing Component was prepared as required by General Plan
<br />Programs PS-23 and PS-24 and the City’s Municipal Code (Geotechnical Investigation, Residential Building, 920
<br />Shasta Street and 122 Buckeye Street, Redwood City, California 94063; Romig Engineers; June 2021). The
<br />geotechnical report provides preliminary conclusions and recommendations regarding the following site-specific
<br />geotechnical issues:
<br /> the presence of medium density sand and silt strata that are susceptible to liquefaction during strong seismic
<br />shaking,
<br /> a high ground water table, and
<br /> highly expansive near-surface soil that will likely be subject to differential movement due to significant volume
<br />changes caused by seasonal fluctuations in soil moisture content.
<br />The above interrelated issues are detailed in the geotechnical report, which also includes the technical data and analysis
<br />of two exploratory borings and six CPTs, all performed on the Housing Component site on June 3, 2021. The
<br />geotechnical report provides recommendations for foundations, retaining walls, vehicle pavements, and earthwork to
<br />address project component-specific issues and concerns. The professional engineering-level discussion is in the
<br />original report by Romig Engineers (June 2021).
<br />The geotechnical report concludes: “From a geotechnical viewpoint, the site is suitable for the proposed building,
<br />provided the recommendations presented in this report are followed during design and construction” (p. 9).
<br />The current geotechnical report prepared for the Housing Component, and any subsequent revisions, is subject to City
<br />review and approval, as would subsequent detailed excavation, earthwork, and foundation plans. In collaboration
<br />with a California Registered Geotechnical Engineer, the appropriate City staff would also observe onsite construction
<br />work. These conclusions are consistent with the California Building Code (CBC), the California Historical Building
<br />Code (CHBC), and the Focused GPU (Chapter 4.7, Geology and Soils). The Housing Component would not create
<br />new impacts or increase impacts, and there is no new information of substantial importance for CEQA purposes.
<br />iv) The Housing Component site is relatively flat; no impacts from landslides are anticipated.
<br />The Focused GPU EIR concluded that while the Planning Area could be subject to moderate to severe ground shaking
<br />and to liquefaction, the City’s Public Safety Element policies, the City’s development standards contained within the
<br />municipal code, and State Building Code requirements, including the Housing Component site-specific geotechnical
<br />report, would reduce potential impacts related to geologic and seismic constraints on future development within the
<br />Planning Area to a less-than-significant level. No additional mitigation was required. Because the Housing
<br />Component would have a less-than-significant impact with compliance with the regulatory framework and
<br />incorporation of standard project conditions, the Housing Component would be consistent with the analysis within the
<br />Focused GPU EIR. It would not create new impacts or increase impacts and there is no new information of substantial
<br />importance for CEQA purposes.
<br />b. The Focused GPU EIR concluded that with implementation of Public Safety Element policies, water quality regulatory
<br />permitting requirements, and guidelines for erosion control in the Municipal Code, impacts related to erosion from
<br />future development in the Planning Area would be less than significant.
<br />The Housing Component shall be subject to the National Pollutant Discharge Elimination System’s (NPDES)
<br />requirements, which require the preparation of a Storm Water Pollution Prevention Plan (SWPPP), and the City’s
<br />Municipal Code, which requires the preparation of precise grading plans and specifications, and erosion control plans
<br />and specifications where the site possesses a high erosion potential, as determined by the Director of Public Works
<br />(Focused GPU EIR. P. 4.7-14). The project component shall comply with all applicable erosion control requirements
<br />of the NPDES, Redwood City General Plan, and Redwood City Municipal Code, which would reduce any potentially
<br />significant Housing Component impact on soil erosion and sedimentation to a less-than-significant level. The Housing
<br />Component is consistent with the analysis in the EIR/SEIR because it would not create new impacts or increase
<br />impacts, and there is no new information of substantial importance for CEQA purposes.
<br />c. The Focused GPU EIR noted that due to the presence of local and regional faults, sandy soils, and shallow
<br />groundwater, portions of the subject area may experience subsidence, lateral spreading, or collapse during strong
<br />ATTY/RESO.0031/CC RESO CEQA GUIDELINES (901 EL CAMINO REAL)
<br />REV: 04-22-25 VR
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