ORD 1961 - Laserfiche WebLink

Hydrology and Water Quality 1. Flooding and hydromodification (pp. 174-176, 177-178 and 367-368; Condition 4-5, 71, 80-81, and 83 of PUD-33; MM/P H1a and H1b.). a. Potentiallmpact. Development of the Environmentally Superior Project could increase the amount of run- off, potentially exacerbating existing downstream flooding problems and/ or causing hydromodification impacts. b. Mitigation Measures. The following mitigation measures are hereby adopted and will be implemented as provided for in the Mitigation Monitoring and Implementation Program: • Implement Oak Grove Planned Unit Development (PUD-33) Mitigation Measures H1a and H1b. c. Findings. Based on the EIR and the entire record before the City, the City finds that: (i) Effects of Mitigation. The Environmentally Superior Project's potential impacts due to the possible increase in the amount of run-off will be mitigated to less-than-significant levels through the implementation of the mitigation measures discussed above because the measures require the demonstration, through detailed hydraulic analysis, that implementation of the proposed drainage plans will not impact flooding conditions or create potential hydromodification impacts downstream. Further, the Environmentally Superior Project, as conditioned, contains requirements that the project developer and/or future building developers shall complete the specific actions: • To address the potential degradation of water quality in nearby surface water bodies by urban stormwater runoff from construction activities and post- construction land uses, the project developer, future building developers, and homeowners shall comply with the Alameda Countywide NPDES C.3 Permit #CA50029831 with respect to the treatment of runoff water, a copy of which is available at the City offices. In addition to the Standard Urban stormwater Runoff Requirements for compliance with the Alameda County NPDES Permit, the project shall comply with the Permit's Hydro Modification requirements as approved by the Regional Water Quality Control Board (RWQCB) for Alameda County. Exhibit A Page 34 of 45 Ordinance No. 1961 PUD-33, Oak Grove