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7.B. - Page 91 <br /> Redwood City Chapter 4.Environmental Impact Analysis <br /> Less-than- <br /> Potentially Significant New Less-than- <br /> Significant Impact with Significant <br /> New Mitigation New No New <br /> 4.6.HYDROLOGY AND DRAINAGE Impact Incorporated Impact Impact <br /> Would the project: <br /> a. Violate any water quality standards or waste ❑ ❑ � ❑ <br /> discharge requirements? <br /> b. Substantially deplete groundwater supplies ❑ ❑ � ❑ <br /> or interfere substantially with groundwater <br /> recharge such that there would be a net <br /> deficit in aquifer volume or a lowering of the <br /> local groundwater table level(e.g.,the <br /> production rate of pre-existing nearby wells <br /> would drop to a level that would not support <br /> existing land uses or planned uses for which <br /> permits have been granted)? <br /> c. Substantially alter the existing drainage ❑ ❑ � ❑ <br /> pattern of the site or area,including through <br /> the alteration of the course of a stream or <br /> river,in a manner that would result in <br /> substantial erosion or siltation on-or <br /> offsite? <br /> d. Substantially alter the existing drainage ❑ ❑ � ❑ <br /> pattern of the site or area,including through <br /> the alteration of the course of a stream or <br /> river? <br /> e. Substantially increase the rate or amount of ❑ ❑ � ❑ <br /> surface runoff in a manner which would <br /> result in flooding on-or offsite;create or <br /> contribute runoff water that would exceed <br /> the capacity of existing or planned <br /> stormwater drainage systems or provide <br /> substantial additional sources of polluted <br /> runoff? <br /> £ Otherwise substantially degrade water ❑ ❑ � ❑ <br /> quality? <br /> g. Place housing within a 100-year flood ❑ ❑ ❑ � <br /> hazard area,as mapped on a federal Flood <br /> Hazard Boundary or Flood Insurance Rate <br /> Map or other flood hazard delineation map? <br /> h. Place within a 100-year flood hazard area ❑ ❑ ❑ � <br /> structures that would impede or redirect <br /> floodflows? <br /> i. Expose people or structures to a significant ❑ ❑ ❑ � <br /> risk of loss,injury,or death involving <br /> flooding,including flooding as a result of the <br /> failure of a levee or dam;or inundation by <br /> seiche,tsunami,or mudflow? <br /> Addendum No.2 to the Environmental Impact Report for 4-46 September 2012 <br /> the Redwood City Costco Wholesale Project ICF 00154.12 <br />