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7.B. - Page 84 2 Environmental Analysis <br /> g) Place housing within a 100-year flood ❑ ❑ ❑ <br /> hazard area as mapped on a federal Flood <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 ❑ ❑ ® ❑ <br /> area structures which would impede or <br /> redirect flood flows? <br /> i) Expose people or structures to a ❑ ❑ ® ❑ <br /> significant risk of loss,injury or death <br /> involving flooding,including flooding as a <br /> result of the failure of a levee or dam? <br /> j) Inundation by seiche, tsunami, or ❑ ❑ ® ❑ <br /> mudflow? <br /> a) Violate any water quality standards or waste discharge requirements? <br /> The proposed project would comply with all applicable water quality requirements. The proposed <br /> construction activity for the storm drain pump station and US 101 undercrossing would result in <br /> surface disturbance of 1.2 acres and would require formal notification and submittals under the <br /> general permit for construction stormwater discharges. The City would file a Notice of Intention to <br /> comply with the California General Storm Water Construction Permit (Order No. 2012-006-DWQ) <br /> and would submit a SWPPP to the SFRWQCB. The City would incorporate BMPs for preventing <br /> contaminants and sedimentation from construction activity from entering stormwater and affecting <br /> the water quality in Redwood Creek. The City would prepare an Emergency Response Plan (ERP) <br /> that would require storage and containment of potential spills of hydrocarbon fuels, concrete <br /> wastewater, or sanitary wastes during construction. Cleaning, fueling, or any maintenance of <br /> construction equipment would take place in designated staging areas at least 100 feet away from any <br /> sensitive areas and Redwood Creek. A cofferdam would isolate the impacts of the construction <br /> activity on creek bank from the waters in Redwood Creek;the dam would be installed during low <br /> tide, also reducing impacts to water quality. Erosion control measures would be implemented on <br /> land surface disturbance upland of Redwood Creek,and the project would incorporate the designated <br /> measures in the NPDES compliance checklist in Appendix I. The BRS in Appendix D lists <br /> additional measures to protect water quality.With the implementation of all proposed mitigation <br /> measures, the impacts of construction and operation of the project on water quality would be less <br /> than significant. <br /> There would be no discharge to surface or groundwater during dewatering of the wet well and the <br /> cofferdam area. The City would discharge the water to a filtration system prior to discharging the <br /> 2-44 US 101 Pedestrian Undercrossing and Bair <br /> Island Road Storm Drain Pump Station Project <br />