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4.10 Hydrology and Water Quality <br />Impact <br />Issues (and supporting Information Determination <br />Sources) in EIR <br />HYDROLOGY AND WATER QUALITY: <br />Would the project: <br />(a) Violate any water quality <br />standards or waste discharge <br />Less Than <br />requirements or otherwise <br />Significant With <br />substantially degrade surface <br />Mitigation <br />or groundwater quality? <br />(b) Substantially decrease <br />groundwater supplies or <br />interfere substantially with <br />Less Than <br />groundwater recharge such <br />Significant <br />that the project may impede <br />sustainable groundwater <br />management of the basin? <br />(c) Substantially alter the existing <br />drainage pattern of the site or <br />area, including through the <br />alteration of the course of a <br />stream or river or through the <br />addition of impervious <br />surfaces, in a manner which <br />would: <br />Less Than <br />(i) Result in substantial erosion or <br />Significant With <br />siltation on- or off -site? <br />Mitigation <br />(ii)Substantially increase the rate <br />Less Than <br />or amount of surface runoff in a <br />Significant With <br />manner which would result in <br />Mitigation <br />flooding on- or off -site? <br />(iii) Create or contribute runoff <br />water which would exceed the <br />Less Than <br />capacity of existing or planned <br />Significant With <br />stormwater drainage systems or <br />provide substantial additional <br />Mitigation <br />sources of polluted runoff? <br />(iv) Impede or redirect flood <br />No Impact <br />flows? <br />(d) In flood hazard, tsunami, or <br />seiche zones, risk release of <br />No Impact <br />pollutants due to project <br />inundation? <br />(e) Conflict with or obstruct <br />implementation of a water <br />Less Than <br />quality control plan or <br />Significant <br />sustainable groundwater <br />management plan? <br />Any Substantial Any Substantially <br />Changes <br />Changed <br />Involving New <br />Circumstances <br />Significant <br />Involving New <br />Impacts or <br />Significant Impact <br />Any New <br />Project <br />Substantially <br />or Substantially <br />Information of <br />Incorporates <br />More Severe <br />More Severe <br />Substantial <br />Mitigation <br />Impacts? <br />Impacts? <br />Importance? <br />Measure(s)? <br />No No No Yes <br />No No No No <br />No <br />No <br />No <br />Yes <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No <br />No No No No <br />Cabrillo Town Center City of Santa Ana <br />Technical Memorandum August 2023 <br />City Council 18 — 581 10/3/2023 <br />