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3.0 ENVIRONMENTAL CHECKLIST <br />City of San Leandro 1388 Bancroft Avenue Project <br />November 2018 Initial Study/Mitigated Negative Declaration <br />3.0-47 <br /> <br />Potentially <br />Significant <br />Impact <br />Less Than <br />Significant <br />Impact with <br />Mitigation <br />Incorporated <br />Less Than <br />Significant <br />Impact <br />No <br />Impact <br />9. HYDROLOGY AND WATER QUALITY. Would the project: <br />a) Violate any water quality standards or waste <br />discharge requirements? <br />b) Substantially deplete groundwater supplies or <br />interfere substantially with groundwater recharge, <br />such that there would be a net deficit in aquifer <br />volume or a lowering of the local groundwater <br />table level (e.g., the production rate of pre-existing <br />nearby wells would drop to a level which would <br />not support existing land uses or planned uses for <br />which permits have been granted)? <br /> <br />c) Substantially alter the existing drainage pattern of <br />the site or area, including through the alteration of <br />the course of a stream or river, in a manner which <br />would result in substantial erosion or siltation on- <br />or off-site? <br /> <br />d) Substantially alter the existing drainage pattern of <br />the site or area, including through the alteration of <br />the course of a stream or river, or substantially <br />increase the rate or amount of surface runoff in a <br />manner, which would result in flooding on- or off- <br />site? <br /> <br />e) Create or contribute runoff water which would <br />exceed the capacity of existing or planned <br />stormwater drainage systems or provide <br />substantial additional sources of polluted runoff? <br /> <br />f) Otherwise substantially degrade water quality? <br />g) Place housing within a 100-year flood hazard area <br />as mapped on a federal Flood Hazard Boundary or <br />Flood Insurance Rate Map or other flood hazard <br />delineation map? <br /> <br />h) Place within 100-year flood hazard area structures <br />which would impede or redirect flood flows? <br />i) Expose people or structures to a significant risk of <br />loss, injury, or death involving flooding, including <br />flooding as a result of the failure of a levee or dam? <br /> <br />j) Inundation by seiche, tsunami, or mudflow? <br />ENVIRONMENTAL SETTING <br />The project site is in the San Francisco Bay Hydrologic Region, which covers approximately 4,500 <br />square miles and encompasses 10 counties, including Alameda County. It corresponds with the