Reso 2004-082 - Laserfiche WebLink

Home

POTENT]ALLY ISSUES POTENTIALLY SIGNIFICANT LESS THAN NO SIGNIFICANT UNLESS SIGNIFICANT IA91'ACT SOURCES ISSUES MITIGATION ID7PACT i -- INCORPORATED d. Substantially alter the existing drainage pattern X 2 of the site or area, including tlu-ough the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a mamner that would result in flooding on- or off-site? e. Create or conh~ibute runoff water, which would X X Z exceed the capacity of existing or plarrrned (during (for stormwater drainage systems or provide construction buildout) substantial additional sources of polluted phase) nunoff? f. Otherwise substantial) de ade water uali ? X 2 g. Place housing within a 100-year flood hazard X 1, 2 area as mapped on a federal Flood Hazard Boundary or Flood Insurance Rate Map F or other flood hazard delineation ma ? h. Place within a 100-year flood hazard area X 1 shvctures that would irrrpede or redirect flood flows? i. Expose people or shuctures to a significant risk X 1 of loss, injury or death involving floodurg, including flooding as a result of the failure of a levee or dam? j. Inundation b seiche, tsunanu, or mudflow? X 1 k. Exposure of people property to water related X 1 hazards such as tidal waves? EXPLANATION: The project site is fairly level with development, including an unoccupied un-reinforced building and paving, existing on a portion of the project site. The project site is located within flood zone X on the Flood Insurance Rate Map (FIRM). Therefore, potential flooding impacts are anticipated to be less than significant. The site is within 2 pules of Lake Chabot, which has an earthen dam. 'The site would be subject to inundation approximately 1-2 feet in depth within 15 minutes of complete dam failure. However, the dam has recently undergone extensive retrofitting iu anticipation of a future major seismic event. Therefore, impacts due to inundation are considered less than significant. The site is approximately two pules inland from the San Francisco Bay shore. ~ Hence, the potential for inundation due to tsunami and/or seiche is considered remote. The following nutigation measures are recommended i~ order to reduce potentially significant impacts related to hydrology and water quality during the construction phase to a less than significant level: • In accordance with the requirements of the National Pollutant Discharge Elimination System (NPDES) pernut, the applicant shall file a Notice of Intent (NOI) with the Regional ~'4'ater Quality Control Board (RWQCB) advising that the project is under consideration for construction. The applicant shall submit proof of RR'QCB approval or exemption from the requirement to the City Engineer prior to issuance of grading permits. To control storm water pollution, the applicant shall comply with the regulations and provisions contained in the Citj''s Grading Ordinance, the City's Storm Water Pollution Prevention Pertttit, and the NPDES, to the satisfaction of the City Engineer. • At the discretion of the City Engineer, until such time as all construction for the development has been completed to the satisfaction of the City Engineer, the applicant shall provide current Erosion & Sediment Control Plans, and amended Storm Water Pollution Prevention Plans (S~'VPPPs) for all portions of the site where construction is ongoing. Said plans shall be submitted to the City Engineer for review and approval on or before September 1 of each calendar year, and shall be fully implemented on or before October 15 of each calendar year. 1016-1052 Davis/ PLN2004-0003 ] - bnitial Study Checklist 5 Apri12004