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LSA ASSOCIATES. INC. CEQA INITIAL STUDY /MITIGATED NEGATIVE DECLARATION <br /> MARCH 1011 PREDA STREET PIPE BRIDGES UPGRADE <br /> SAN LEANDRO. CALIFORNIA <br /> Less Than <br /> Significant <br /> Potentially with Less Than <br /> Significant Mitigation Significant No <br /> Impact Incorporated Impact Impact <br /> IX. HYDROLOGY AND WATER QUALITY. Would <br /> the project: <br /> a) Violate any water quality standards or waste discharge U • LI 0 <br /> requirements? <br /> b) Substantially deplete groundwater supplies or interfere sub- LI 0 ❑ • <br /> stantially with groundwater recharge such that there would <br /> be a net deficit in aquifer volume or a lowering of the local <br /> groundwater table level (e.g., the production rate of pre- <br /> existing nearby wells would drop to a level which would <br /> not support existing land uses or planned uses for which <br /> permits have been granted)? <br /> c) Substantially alter the existing drainage pattern of the site LI • U U <br /> or area, including through the alteration of the course of a <br /> stream or river, in a manner which would result in substan- <br /> tial erosion or siltation on- or off -site? <br /> d) Substantially alter the existing drainage pattern of the site U 0 • U <br /> or area, including through the alteration of the course of a <br /> stream or river, or substantially increase the rate or amount <br /> of surface runoff in a manner which would result in flood- <br /> ing on- or off -site? <br /> e) Create or contribute runoff water which would exceed the L U • U <br /> capacity of existing or planned stormwater drainage sys- <br /> tems or provide substantial additional sources of polluted <br /> runoff? <br /> f) Otherwise substantially degrade water quality? 0 • U U <br /> g) Place housing within a 100 -year flood hazard area as U U <br /> mapped on a federal Flood Hazard Boundary or Flood <br /> Insurance Rate Map or other flood hazard delineation map? <br /> h) Place within a 100 -year flood hazard area structures which D L • LI <br /> would impede or redirect flood flows? <br /> i) Expose people or structures to a significant risk of loss, U U • U <br /> injury or death involving flooding, including flooding of as <br /> a result of the failure of a levee or dam? <br /> j) Inundation by seiche, tsunami, or mudflow? LI LI U • <br /> Affected Environment: <br /> The project site is located at an existing sewer pipe crossing over San Leandro Creek adjacent to <br /> Alder Creek Circle, near Preda Street, in the City of San Leandro (Figures 1 and 2). San Leandro <br /> Creek is an east -west trending creek that extends west from its headwaters above the Upper San <br /> P:\ EGI0801 \CEQA\Prcda_FINAL_IS- MND.doc (03/28/I I) 37 <br />