8F Consent 2007 0618 - Laserfiche WebLink

Home

Thus, the proposed project would not result in significant encroachment of the floodplain or support any incompatible floodplain development. The project site is located within the dam inundation area for two dams in the area: Lake Chabot and Upper San Leandro reservoirs (ABAG, 2002). However, the potential for affecting more people from dam failure is considered low, since many users of the Bay Trail already live and work in dam failure areas. The site is located at the edge ofthe Bay and there are no known mudflow hazards affecting the site. The site is not within an area that would be affected by a tsunami or seiche (waves caused by seismic activity) (ABAG, 2005). Impact VID-l: Discharge and runoff from construction activities and on-going maintenance could impact the quality of the Oyster Bay Slough and San Francisco Bay waters Mitigation Measure VllI-1: The bid specificationsfor the project shall include a requirement that a Storm Water Pollution Prevention Plan be completed prior to commencing construction. The Plan shall incorporate current Best Management Practices (BMPs) for ensuring that discharges of construction materials and Bay muds into slough and Bay waters do not occur during pile driving and other construction activities (such as netting). The Plan shall incorporate all requirements of the permits issuedfor the project by the Us. Army Corps of Engineers (Section 404 and/or Section 7 permits), the California Regional Water Quality Control Board Water Quality Certification (401 permi!), and the Bay Conservation and Development Commission. The Plan shall also incorporate current BMPs for other construction activities, maintenance, and site operations, and spill prevention control measures. BMPs during construction include scheduling excavation activitiesfor dry weather periods; taking measures to prevent erosion; keeping construction materials protected from rain; and general good housekeeping practices. The construction plans prepared for the project shall include BMPs to minimize the potentialfor erosion and sedimentation associated with soil handling (excavations, stockpiles, transportation) and off-site sedimentation. The Plan shall also include BMPs to ensure that periodic painting and other maintenance of the bridge do not irrzpact water quality. The Plan shall be submitted for approval to the city of San Leandro Engineering and Transportation Department. Incorporation of the mitigation measure above would reduce potential impacts to a less-than- significant level. Y4204IS.00693.doc - 4/5/07 -30-