75A - One Broadway Plaza Addendum_4.20.2020_wAppendices

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ONE BROADWAY PLAZA PROJECT EIR ADDENDUM CITY OF SANTA ANA 5. Environmental Analysis 5.7.3 Adopted Mitigation Measures Applicable to the Proposed Project The following mitigation measures have been carried through from the One Broadway Plaza EIR. These mitigation measures have been incorporated into MMRP for this Addendum. Any modifications to the mitigation measures from the Certified EIR are shown as setlr-egk for deleted text and bold for new, inserted text. G-1 The design for the project will comply with all applicable provisions of the Preliminary Geotechnical Feasibility Investigation performed by Zeiser Kling Consultants and their Addendum Recommendations, including recommendations for grading, removal and recompaction of soils, foundations, settlement, pile foundations, design criteria, seismic design, retaining walls, ferrous corrosion, surface drainage, pavement design, concrete hardscape, soldier pile/logging system and supplemental investigations. G-2 Prior to acquiring a grading permit for project construction, the developer will prepare a Final Geology and Soils Report, to specifically assess the following: i. The shrink -swell potential of potentially expansive soils on the site; specifically addressing appropriate recommendations for soil treatments, grading procedures and/or foundation designs, as appropriate, for the planned land use on the site. ii. The potential for compressible soils on the site; specifically addressing appropriate recommendations for soil treatments, grading procedures and/or foundation designs, as appropriate, for the planned land use on the site. The recommendations from the Final Geology and Soils Report will be incorporated into the grading plan for the project. G-3 Prior to obtaining a grading permit for project construction, the Final Geology and Soils Report will specifically assess grading control with special emphasis on controlling fugitive dust which could be generated during site preparation, grading and construction. The reports will specifically provide for establishing procedures for dust control and monitoring so that unacceptable levels of dust do not escape from the site. These dust control measures will be coordinated with the dust control measures described in Section 3.4 (Air Quality) of the Certified EIR. The standards and procedures developed in the reports will be incorporated into the grading plan to be followed by the project developer. G-4 All structures to be erected on the One Broadway Plaza site will be designed in accordance with the seismic design provisions in the Final Geology and Soils Report and of the Uniform Building Code to promote safety in the event of such an earthquake. G-5 During final design, the developer will consult with the Orange County Water District and the Regional Water Quality Control Board, Santa Ana, regarding intrusion of foundation piles into the Orange County Groundwater Basin. The project applicant will solicit the appropriate permits and approvals from the OCWD and the RWQCB for the anticipated intrusion of the foundation piles into the Apri12020 Page 49