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64 and specifications where the site possesses a high erosion potential, as determined by the Director of Public Works (Focused GPU EIR. P. 4.7-14). The project component shall comply with all applicable erosion control requirements of the NPDES, Redwood City General Plan, and Redwood City Municipal Code, which would reduce any potentially significant project component impact on soil erosion and sedimentation to a less-than-significant level. This project component is consistent with the analysis in the EIR/SEIR because it would not create new impacts or increase impacts, and there is no new information of substantial importance for CEQA purposes. c. The Focused GPU EIR noted that due to the presence of local and regional faults, sandy soils, and shallow groundwater, portions of the subject area may experience subsidence, lateral spreading, or collapse during strong seismic events, in addition to the potential for liquefaction or landslides. The Focused GPU EIR concluded that with implementation of Public Safety Element and compliance with the regulatory framework, impacts related to unstable soils would be reduced to less than significant. No changes to geologic substructures are expected to occur as a result of project component implementation. As described in item (a) above, the proposed project component would comply with all applicable local and State codes and regulations, and project component design would incorporate City-approved geotechnical recommendations for site development. This impact is considered less than significant. All grading plans are subject to City review and approval. Also see item (a) above for a summary of the geotechnical report findings regarding proposed foundation types and techniques recommended to counter the high expansion potential of onsite surface soils. As the proposed project component would have a less-than-significant impact with the incorporation of standard conditions and compliance with the regulatory framework, it would be consistent with the Focused GPU EIR. It would not create new impacts or increase impacts and there is no new information of substantial importance for CEQA purposes. d. The Focused GPU EIR determined portions of the Planning Area contain soils that have a high clay content, creating expansion potential (p. 4.7-16). This type of soil constraint could impact future structures and their occupants within the Planning Area. The Focused GPU EIR concluded existing General Plan policies and programs intended to protect against geologic and seismic hazards, including Policies PS-6.1 and PS-6.1 and Programs PS-23 and PS-24, in conjunction with conformance with the California State Building Code (which shall be required as conditions of approval for the project component) would reduce the project component’s potential effects related to soil constraints, including expansive soils, to a less-than-significant level. According to the project component-specific geotechnical report (p. 9), laboratory testing results show the surface soils of the project component site have a high expansion potential when subjected to fluctuations in moisture levels. The geotechnical report recommends that the building foundation’s footings should be underlain with 12 inches of non-expansive soil material or concrete slurry, with the non-expansive soil materials compacted to at least 90 percent relative maximum density (p. 13). Additionally, the concrete slab foundation should be underlain by a minimum of 17 inches to non-expansive fill or lime-treated native soil layer, with the non-expansive soil compared to at least 90 percent relative maximum density (p. 14). Further, alternative pavement sections (asphalt and base rock) are recommended for the parking area to reduce the amount of pavement cracking anticipated fur to the high expansion potential of surface soils (p. 19). All recommended solutions would be subject to City review and approval for feasibility and effectiveness. As discussed, the EIR/SEIR determined impacts from expansive soils to be less than significant with mitigation. As the subject project component would have a less-than-significant impact with the incorporation of standard conditions of approval and compliance with the regulatory framework, it would be consistent with the Focused GPU EIR. It would not create new impacts or increase impacts, and there is no new information of substantial importance for CEQA purposes. e. The Focused GPU EIR did not address impacts related to adequate soils for the use of septic tanks or alternative waste water disposal systems because septic systems are not appropriate within urbanized areas. The Focused GPU EIR concurred and found the impact to be less than significant. There would be no use of septic tanks or alternative wastewater disposal systems for the project component. No impact would occur. Because the 847 Woodside project component would connect to the existing sewer system, this project component is consistent with the analysis in the EIR/SEIR. It would not create new impacts or increase impacts and there is no new information of substantial importance for CEQA. f. The Focused GPU EIR stated that the Planning Area is not known to have paleontological resources but could potentially contain previously undiscovered resources (p. 4.7-18). Regarding unique geological resources, the Focused GPU EIR notes proposed development on previously undisturbed land that contains steep slopes, rocky ATTY/RESO.0074/CC RESO 847 WOODSIDE (CEQA) - EXHIBIT 1 - CEQA CONSISTENCY CHECKLIST REV: 10-23-24 VR Page 64 of 135