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One Broadway Plaza Project Mitigation Monitoring Program TABLEt MITIGATION MONITORING PROGRAM FOR THE ONE BROADWAY PLAZA PROJECT Mitigation Measure Implementation Responsible Schedule Department Land Use Measures There are no significant adverse land use impacts and no mitigation is required. Topo~raphy, Geology and Soils G-I The design for the project will comply with all provisions of the Preliminary Geotechnical Feasibility During design, grading and Executive Director of the Investigation performed by Zeiser Kling Consultants and their Addendum Recommendations, including construction. Public Works Agency recommendations for grading, removal and recompaction of soils, foundations, settlement, pile (PW A)/Executive foundations, design criteria, seismic design, retaining walls, ferrous corrosion, surface drainage, pavement Director of Building & design, concrete hardscape, soldier pile/logging system and supplemental investigations. Planning (PBA) or his/her designee. G-2 Prior to acquiring a grading permit for project construction, the developer will prepare a Final Geology Prior to obtaining a grading Executive Director of the and Soils Report, to specifically assess the following: permit. PW AlPBA or his/her 1. The shrink-swell potential of potentially expansive soils on the site; specifically addressing designee. appropriate recommendations for soil treatments, grading procedures and/or foundation designs, as appropriate, for the planned land use on the site. 11. 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 Prior to obtaining a grading Executive Director of the specifically assess grading control with special emphasis on controlling fugitive dust which could be permit. PW AlPBA or his/her generated during site preparation, grading and construction. The reports will specifically provide for designee. 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). 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 During design and Executive Director of the seismic design provisions in the Final Geology and Soils Report and of the Uniform Building Code to construction PW AlPBA or his/her promote safety in the event of such an earthquake. designee. G-5 During final design, the developer will consult with the Orange County Water District and the Regional During final design and Executive Director of the Water Quality Control Board, Santa Ana, regarding intrusion of foundation piles into the Orange County construction. PW A or his/her designee. Groundwater Basin. The project applicant will solicit the appropriate permits and approvals from the OCWD and the R WQCB for the anticipated intrusion of the foundation piles into the Groundwater Basin U:\VFregosoIWP5 JIREPORTSIOne Broadway MMP.doc June J 4, 2004 Page 2