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Environmental Checklist For CEQA Compliance Potentially Significant Potentially Unless Less Than Significant Mitigation Significant No Issues & Supporting Information Sources Impact Incorporated Impact Impact C. Substantially alter the existing drainage pattern of ^ ^ ~ ^ the site or area, including through the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off- site? D. Create or contribute runoff water which would ^ ^ ~ ^ exceed the capacity of existing or planned storm water drainage systems or provide substantial additional sources of polluted run-off? E. Otherwise substantially degrade water quality? ^ ^ ^ ^ F. Place housing within a 100-year floodplain, as ^ ^ ^ mapped on a federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? G. Place within a 100-year floodplain structures which ^ ^ ^ would impede or redirect flood flows? H. Expose people or structures to a significant risk of ^ ^ ^ loss, injury, or death involving flooding, including flooding as a result of the failure of a levee or dam. I. Result in an increase in pollutant discharges to ^ ~ ^ ^ receiving waters? Consider water quality parameters such as temperature, dissolved oxygen, turbidity and other typical storm water pollutants (e.g. heavy metals, pathogens, petroleum derivatives, synthetic organics, sediment, nutrients, oxygen-demanding substances, and trash) J. Result in significant alteration of receiving water ^ ~ ^ ^ quality during or following construction? K. Could the proposed project result in increased ^ ~. ^ ^ erosion downstream? L. Result in increased impervious surtaces and ^ ^ ~ ^ associated increased runoff? tlb\Env Form CEOA Chkist Peg¢ 6 Of 12 ATT~F~~ B 0 5