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ISSUES Place within a 100-year flood hazard area structures that would impede or redirect flood flows? 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 POTENTIALLY POTENTIALLY SIGNIFICANT LESS THAN NO SIGNIFICANT UNLESS SIGNIFICANT ESAPACT SOURCES ISSUES MITIGATION IMPACT INCORPORATED X 11 X 11 levee or dam? X 2,13 Inundation by seiche, tsunami, or mudflow? X 2,13 k. Exposure of people property to water related hazards such as tidal waves? EXPLANATION: The project site itself is fairly level, with development, including abandoned industrial buildings and paving existing on a portion of the project site, To date, a site -specific or project -specific hydrological study has not been performed. Given the existing on -site soils, the type of development proposed, and due to the fact that San Leandro Creek forms the northern project boundary, it can be anticipated that implementation of the proposed project may result in potentially significant impacts related to water quality, groundwater, drainage patterns, and increased rum -off. The following mitigation measures are recommended in order to reduce potentially significant impacts related to hydrology and water quality to a less than significant level: Prior to adoption of the Final Map, a site -specific hydrology study shall be puse and degradation, minimumaffects the potential impacts of the proposed project with regards to water quality, groundwater on existing drainage patterns, and the potential for increased run-off. The hydrology study shall be submitted to the City Engineer for review and approval. Prior to issuance of grading permits for each phase of construction, an erosion control plan shall be developed for the site in order to minimize any erosion that may occur during grading. Protection measures may include implementing silt fencing, hay bales and/or sand bags. The erosion control plan shall be submitted to the City Engineer and Alameda County Flood Control District for review and approval. In accordance with the requirements of the National Pollutant Discharge Elimination(NPDES) advisinit,g the the applicant shall file a Notice of Intent (NOI) with the Regional Water Quality Control Board project is under consideration for construction. The applicant shall submit proof of approval from the RWQCB 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 City's Grading Ordinance, the City's Storm Water Pollution Prevention Permit, and the NPDES, to the satisfaction of the City Engineer. The project site is located within flood Zone C, described as an "Area of Minimal. Flooding' on the Flood Insurance Rate Map (FIRM), Therefore, potential flooding impacts are anticipated less than significant The site is several miles inland from the San Francisco Bay shore. Hence, the potential for inundation due to tsunami and/or seiche is considered remote. ement or air AIR QUALITY. Where a�'ailable, the significance criteria established by the applicable air quality ma DolIution control district may be relied upon to make the folloi� ina d terminations. tiVould't1Y projeI t: Conflict with or obstruct implementation of Me applicable air quality Plan? — Violate any air quality standard or contribute substantially to an existing or projected air quality violation? Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non -attainment under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone 41 C. Preda Street Homes - Initial Study Checklist `7$ ►0 X January 2001