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Pleasanton Gateway- Environmental Checklist <br /> Less Than <br /> Significant <br /> Potentially Impact With Less Than <br /> Significant Mitigation Significant No <br /> Issues Impact Incorporated Impact Impact <br /> Hydrology and Water Quality <br /> Would the project: <br /> a) Violate any water quality standards or waste discharge 1 X Cil <br /> requirements? <br /> b) Substantially deplete groundwater supplies or interfere F1 CXX] <br /> substantially with groundwater recharge such that <br /> there would be a net deficit in aquifer volume or a <br /> lowering of the local groundwater table level (e.g., the <br /> production rate of pre- existing nearby wells would <br /> drop to a level which would not support existing land <br /> uses or planned uses for which permits have been <br /> granted)? <br /> c) Substantially alter the existing drainage pattern of the [X <br /> site or area, including through the alteration of the <br /> course of a stream or river, in a manner, which would <br /> result in substantial erosion or siltation on- or off-site? <br /> d) Substantially alter the existing drainage pattern of the F ] [X <br /> site or area, including through the alteration of the <br /> course of a stream or river, or substantially increase <br /> the rate or amount of surface runoff in a manner, <br /> which would result in flooding on- or off -site? <br /> e) Create or contribute runoff water which would exceed 1 X C <br /> the capacity of existing or planned stormwater <br /> drainage systems or provide substantial additional <br /> sources of polluted runoff? <br /> f) Otherwise substantially degrade water quality? <br /> g) Place housing within a 100 -year flood hazard area as r LJ <br /> mapped on a federal Flood Hazard Boundary or Flood <br /> Insurance Rate Map or other flood hazard delineation <br /> map? <br /> h) Place within a 100 -year flood hazard area structures, Li I L � <br /> which would impede or redirect flood flows? <br /> i) Expose people or structures to a significant risk of loss, LI] 1 Lx <br /> injury or death involving flooding, including flooding as <br /> a result of the failure of a levee or dam? <br /> j) Inundation by seiche, tsunami, or mudflow? LI [X <br /> Page 37 of 52 Pleasanton Gateway Initial Study August 2, 2010 <br />