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61 Also see item (a) above for a summary of the geotechnical report findings regarding proposed foundation types and waterproofing and dewatering techniques. 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 EIR/SEIR. It would not create new impacts or increase impacts and there is no new information of substantial importance for CEQA purposes. d. The Downtown Precise Plan program EIR (p. 16-6) determined that development within the DTPP area may be subjected to hazards from expansive soils, representing a potentially significant impact. Mitigation 16-1 requires that the final geotechnical report required by the City Building Official include an analysis of expansive soil hazards and recommended stabilization measures. The DTPP Plan-Wide Amendments program SEIR (pp. 16-12 and 16-13) concurred with the DTPP EIR conclusion and includes Mitigation Measure GEO-4a, which restates Mitigation Measure 16-1 from the DTPP Final EIR with minor text revisions (“clarifying amendments”). Implementation of these measures, combined with conformance with standard CBC and/or CHBC and other applicable State and local regulations (all of which shall be required as conditions of approval for the project component), would reduce the potential effects of expansive soils to a less-than-significant level. According to the project component-specific geotechnical report, the project component site is underlain by stiff to vary stiff clay with varying sand content (p. 5). The results of laboratory testing conducted on site soil samples indicate the surficial clay on site is very highly expansive and is subject to large volume changes with changes in moisture content. The geotechnical report recommends that any concrete slabs or exterior concrete flatwork be constructed at or near existing site grades and should be designed and constructed to resist the effects of expansive soil (p. 16). The design and construction recommendations include moisture conditioning the expansive soil and providing select, non- expansive fill or lime-treated soil below slabs. Further, the geotechnical report recommends providing subdrain systems beneath permeable surfaces and installing vertical barriers between permeable surfaces underlain by subdrains and non-permeable surfaces underlain by conventional aggregate base to prevent water from collecting alongside or beneath pavements and flatwork (p. 17). Additionally, to prevent the subgrade soil from becoming saturated, the geotechnical report recommends that permeable aggregate base courses should be underlain by an impermeable liner in zones subject to regular vehicular traffic. All geotechnical report recommendations would be subject to City review and approval for feasibility and effectiveness. In addition, the DTPP program EIR (p. 16-8) noted that development occurring under the DTPP would be subject to damage due to the presence of corrosive soils within the DTPP area. DTPP Mitigation Measure 16-2 specifies that buried metal infrastructure should have cathodic protecting using a sacrificial anode system that conforms to Part VII (G) of the City’s water system design criteria and standard specification details Section 02661. Additionally, concrete mixes must conform to Caltrans specifications for Protection of Reinforcement Against Corrosion Due to Chlorides, Acids, and Sulfates as outlined in the Memo to Designers 10-5, January 2002. The DTPP Plan-Wide Amendments program SEIR (pp. 16-12 and 16-13) concurred with the DTPP EIR conclusion and includes Mitigation Measure GEO-4b, which restates Mitigation Measure 16-2 from the DTPP Final EIR with minor text revisions (“clarifying amendments”). These measures, which shall be required as conditions of approval for the project component, would reduce the potential impacts of corrosive soils on the project component to a less-than-significant level. 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 and compliance with the regulatory framework, it would be consistent with the EIR/SEIR. It would not create new impacts or increase impacts and there is no new information of substantial importance for CEQA purposes. e. The DTPP EIR did not address the impacts related adequate soils for the use of septic tanks or alternative waste water disposal systems because septic systems are not appropriate within urbanized areas. The Plan-Wide Amendments program SEIR 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 1900 Broadway 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 DTPP program EIR (p. 7-41) concluded that earthmoving activity associated with DTPP-facilitated development could potentially disrupt, alter, or eliminate as-yet undiscovered paleontological resources, which represented a potentially significant impact. Mitigation Measure 7-5 of the DTPP program EIR requires that, prior to the issuance of grading or demolition permits, the Planning, Housing, and Economic Development Department (now the Community Development and Transportation Department), in coordination with a qualified paleontologist, assess individual development proposals for the potential to destroy unique paleontological resources and to determine provisions to protect such resources when applicable, possibly including complete avoidance of the resources, in-place ATTY/RESO.0074/CC RESO 847 WOODSIDE (CEQA) - EXHIBIT 1 - CEQA CONSISTENCY CHECKLIST REV: 10-23-24 VR Page 61 of 135