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db\Env Form CEQA Chklst 31A 75 8 Page 6 of 9 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 T� 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 ❑ ❑ ❑ j mapped on a federal Flood Hazard Boundary or i 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 ❑ ❑ ❑ jam' 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? 7 L. Result in increased impervious surfaces and ❑ ❑ ❑ associated increased runoff? db\Env Form CEQA Chklst 31A 75 8 Page 6 of 9