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City of Redwood City, Public Works Division Initial Study & Mitigated Negative Declaration <br />Document Date: October 15, 2015 <br />Revision Date: January 25, 2016 Page 40 Blankinship & Associates, Inc. <br /> <br />3.9 Hydrology and Water Quality <br /> <br /> Potentially <br />Significant <br />Impact <br />Potentially <br />Significant <br />Unless <br />Mitigation <br />Incorporated <br />Less Than <br />Significant <br />Impact <br />No Impact <br /> <br />Would the Project: <br /> <br />a) Violate any water quality standards or <br />waste discharge requirements? <br /> <br />b) Substantially deplete groundwater <br />supplies or interfere substantially with <br />groundwater recharge such that there <br />would be a net deficit in aquifer volume <br />or a lowering of the local groundwater <br />table (e.g., the production rate of pre- <br />existing nearby wells would drop to a <br />level which would not support existing <br />land uses or planned uses for which <br />permits have been granted)? <br /> <br /> <br />c) Substantially alter the existing drainage <br />pattern of the site or area, including <br />through the alteration of the course of a <br />stream or river, in a manner which would <br />result in substantial erosion or siltation <br />on- or off-site? <br /> <br /> <br />d) Substantially alter the existing drainage <br />pattern of the site or area, including <br />through the alteration of the course of a <br />stream or river, or substantially increase <br />the rate or amount of surface runoff in a <br />manner which would result in flooding <br />on-or off-site? <br /> <br /> <br />e) Create or contribute runoff water which <br />would exceed the capacity of existing or <br />planned stormwater drainage systems or <br />provide substantial additional sources of <br />polluted runoff? <br /> <br /> <br />f) Otherwise substantially degrade water <br />quality? <br /> <br />g) Place housing within100-year flood <br />hazard area as mapped on a federal <br />Flood Hazard Boundary or Flood <br />Insurance Rate Map or other flood <br />hazard delineation map? <br /> <br />6.3.A. - Page 48