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IMPACT <br />WILL THE PROJECT: <br />Potentially Less Than <br />Significant <br />Less Than <br /> Cumulative Significant With Significant No Source <br /> Impact Mitigation Impact Impact <br /> Incorporation <br />VIII. Hydrology and Water Quality, <br />continued ^ ^ ^ ® ^ <br />11,12, <br />d) Substantially alter the existing drainage 20 26 <br />' <br />pattern of the site or area, including <br />through the alteration of the course of a <br />stream or river, or substantially increase <br />the rate or amount of surface runoff in a <br />manner which would result in flooding on- <br />or off-site? <br />e) Create or contribute runoff water which <br />~ <br />~ <br />® <br />~ 11, 12, <br />would exceed the capacity of existing or 20 26 <br />' <br />planned storm water drainage systems or <br />provide substantial additional sources of <br />polluted runoff as it relates to C3 <br />regulations for development? <br />f) Otherwise substantially degrade water ~ ~ ~ ® ~ 11, 12, <br />quality? 26 <br />g) Place housing within a 100-year flood ~ ~ ~ ® ~ 11 •12 <br />hazard area as mapped on a federal Flood 20, 26 <br />Hazard Boundary or Flood Insurance Rate <br />Map or other flood hazard delineation <br />map? <br />h) Place within a 100-year flood hazard area ~ ~ •~ ® ~ 11, 12, <br />structures which would impede or redirect 20 <br />26 <br />flood flows? , <br />i) Expose people or structures to a ~ ~ ~ ® ~ 11,12, <br />sign cant risk of loss, injury or death 26 <br />involving flooding, including flooding as a <br />result of the failure of a levee or dam? <br />j) Inundation by seiche, tsunami, or ~ ~ ~ ~ ® 11 12, <br />mudflow? 26 <br />Initial Study* San Leandro Housing Element Update* Page 15 November 12, 2002 <br />