2024-053 - Final Supplemental for The Related Bristol Specific Plan Project

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Plans, Program and Policies. PPP GEC#-1: CBC Compliance. The proposed Project is required to comply with the California Building Standards Code (CBC) as included in the City's Municipal Code as Chapter 8, Article 2, Division I. to preclude significant adverse effects associated with seismic and soils hazards. As part of CBC compliance, CBC related and geologist and,/or civil engineer specifications for the proposed Project shall be incorporated into grading plans and building specifications as a condition of construction permit approval. Impact Finding: The Project would not expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving seismic -related ground failure, including liquefaction (Draft Supplemental EIR at p. 5.4-10). Facts in Support of Findings: The Geotechnical Report (included as Appendix G to the Draft Supplemental EIR) identified that onsite soils consist of clayey soils that exist to a depth of approximately 30 feet bgs. Underlying soils include dense to very dense silty sand, poorly -graded sands, and lean clays. The highest historic groundwater on the Project site was encountered at approximately 5 feet bgs. Groundwater was encountered within onsite borings at depths between 12 feet and 16 feet bgs. However, due to the nature of the soils in the upper 50 feet, the Geotechnical Report determined that the liquefaction potential is considered low. Structures built in the City are required to be built in compliance with the CBC, as included in the City's Municipal Code as Chapter 8, Article 2, Division 1 (and in the Draft Supplemental EIR as PPP GEQ-1 ), which regulates all building and construction projects within the City and implements a minimum standard for building design and construction that includes specific requirements for seismic safety, excavation, foundations, retaining walls and site demolition. The Geotechnical Report prepared for the Project site provides CBC seismic design criteria that are specific to the onsite soils and the potential liquefaction and settlement. Compliance with the CBC, as included as PPP GEO-1, would require proper construction of building footings and foundations so that it would withstand the effects of potential ground movement, including liquefaction and settlement. The CBC, as currently adopted in the City's Municipal Code Chapter 8, Article 2, Division I. includes provisions to reduce impacts caused by potential major structural failures or loss of life resulting from geologic hazards. The City requires the Project specific engineering design recommendations be incorporated into grading plans and building specifications as a condition of construction permit approval. Therefore, the development of the proposed Project would be required to conform to the seismic design parameters of the CBC, as included as PPP GEC-1, would reduce hazards from seismic -related ground failure, including liquefaction and settlement to a less than significant level (Draft Supplemental EIR at p. 5.4-10). Plans, Program and Policies: PPP GEo-1: CBC Compliance. As listed previously. Impact Finding: The Project would not result in substantial soil erosion or the loss of topsoil (Draft Supplemental EIR at p. 5.4-1 1).