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b. Substantially deplete groundwater supplies or <br />POTENTIALLY <br />4, 5, 8 <br />ISSUES <br />POTENTIALLY <br />SIGNIFICANT <br />LESS THAN <br />NO <br />such That there would be a net deficit in aquifer <br />SIGNIFICANT <br />UNLESS <br />SIGNIFICANT <br />IMPACT <br />SOURCES <br />volume or a lowering of the local groundwater <br />ISSUES <br />MITIGATION <br />IMPACT <br />table level (e.g., the production rate of pre- <br />INCORPORATED <br />b. Substantially deplete groundwater supplies or <br />X <br />4, 5, 8 <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- <br />existing nearby wells would drop to a level <br />which would not support existing land uses or <br />planned uses for which permits have been <br />granted? <br />c. Substantially alter the existing drainage pattern <br />X <br />4, 5, 8 <br />of the site or area, including through the <br />alteration of the course of a stream or river, in a <br />manner which would result in substantial erosion <br />or siltation on- or off-site? <br />d. Substantially alter the existing drainage pattern <br />X <br />4, 5, 8 <br />of the site or area, including through the <br />alteration of the course of a stream or river, or <br />substantially increase the rate or amount of <br />surface runoff in a manner which would result in <br />flooding on- or off-site? <br />e. Create or contribute runoff water which would <br />X <br />4, 5, 8 <br />exceed the capacity of existing or planned <br />stormwater drainage systems or provide <br />substantial additional sources of polluted runoff? <br />f Otherwise substantially degrade water quality? <br />X <br />g. Place housing within a 100 -year flood hazard <br />X <br />4, 5, 8 <br />area as mapped on a federal Flood Hazard <br />Boundary or Flood Insurance Rate Map (FIRM) <br />or other flood hazard delineation map? <br />h. Place within a 100 -year flood hazard area <br />X <br />4, 5, 8 <br />structures which would impede or redirect flood <br />flows? <br />i. Expose people or structures to a significant risk <br />X <br />4, 5, 8 <br />of loss, injury or death involving flooding, <br />including flooding as a result of the failure of a <br />levee or dam? <br />Inundation by seiche, tsunami, or mudflow? <br />X <br />4, 5, 8 <br />k. Exposure of people property to water -related <br />X <br />4, 5, 8 <br />hazards such as tidal waves? <br />EXPLANATION: <br />a-b)The project site is currently either underutilized (Site 1) or vacant (Site 2). Site I runoff releases into two on-site storm <br />drain inlets that collect storm water and deliver it to the City storm drain system. Site 2 releases overland onto Martinez. <br />Street and Alvarado Street. Ultimately, both sites discharge into the San Pablo Bay subbasin and the San Leandro <br />Watershed. The applicable water quality objectives and standards for this watershed are listed in the San Francisco Bay <br />Basin Water Quality Control Plan Basin (Basin Plan) prepared by the Regional Water Quality Control Board (RWQCB) in <br />compliance with the federal Clean Water Act (CWA) and the State Porter -Cologne Water Quality Control Act. Section <br />303(d) of the CWA requires that the states make a list of waters that are not attaining standards after the technology-based <br />limits are put into place. <br />Cornerstone at San Leandro Crossings Initial Study 7 March 2009 <br />