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LSA ASSOCIATES, INC. APRIL 2018 Table 1: Mitigation Monitoring and Reporting Program Impact Mitigation Measures H. HYDROLOGY AND WATIJR QUALITY _ HYD -1: If construction of the HYD -l: Implement Mitigation Measure HAZ-1 proposed project or the project variant results in the reuse of existing contaminated soil or contaminated imported fill materials for use as engineered fill or for surcharging, impacts to water quality could occur. HYD -2: The retaining wall, HYD -2: Proposed improvements within 100 -year flood placement of fill material, zones and coastal flooding hazard areas, and proposed reconstruction of Maple Street, improvements affecting stormwater drainage systems (e.g., or other improvements the proposed retaining wall and placement of fill and/or occurring within the current other potential improvements) shall be analyzed using 100 -year flood zone along detailed hydraulic evaluations to ensure that the Redwood Creek could increase improvements would not impede or redirect flood flows, the depth and velocity of flood contribute to exceeding the capacity of existing stormwater flows along the existing banks, drainage systems, or alter the hydrodynamics of stormwater which could result in erosion flows such that erosion could occur. The detailed hydraulic and siltation during operation of evaluations shall be performed and certified by a the proposed project and the professional engineer, and shall quantify the following project variant, information. • The potential for improvements within 100 -year flood zones, coastal flooding hazard areas, and drainage courses to impede or redirect flood flows including storm -related flooding and coastal flooding hazards including tsunamis, sea level rise, and extreme high tides. • The potential for improvements to stormwater drainage systems to exceed the capacity of existing off-site stormwater drainage systems. • The potential for improvements within 100 -year flood zones, coastal flooding hazard areas, and drainage courses to result in changes to the extent and depth of flooding. ATTY/RE50.0035/CC RESO CERTIFYING FINAL EIR-1548 MAPLE REV: 04-30-18 PR Page 46 of 49 IS48 MAPLE STREET PROJECT MITIGATION MONITORING AND REPORTING PROGRAM Timeframe for Responsibility for Oversight of Implementation Implementation Implementation Prior to issuance Project Applicant Redwood City of certificate of Community occupancy Development Director Prior to issuance Project Applicant Redwood City of grading permits Community Development Director RESO. NO. 15661 MUFF NO. 601