3B Public Hearing 2009 0720 - Laserfiche WebLink

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PLN2008-00030; Cornerstone at San Leandro Crossings March 20, 2069 Mitigated Negative Declaration Mitigation Measure #3: The City of San Leandro has incorporated the 2006- International Building Code into its municipal building code (Title 7, Chapter 7-5). The project applicant would be required to comply with all applicable State and City regulations to address potential geologic hazards associated with the proposed project, including ground shaking and liquefaction. Geotechnical and seismic design criteria must conform to engineering recommendations in accordance with the seismic requirements of the 2007 California Building Code (Title 24) and any amendments adopted in the San Leandro Municipal Code. Additionally, because the project site is in a liquefaction Seismic Hazard Zone, the project applicant will be required to comply with the guidelines set forth by California Geological Survey Special Publication 117. Mitigation Measure #4: Where wet and/or subgrade soils are encountered during subgrade preparation or other grading activities, the weak soil shall be removed and replaced with select fill in compliance with the compaction and other requirements set forth in the Final Geotechnical Report (Rockridge Geotechnical, January 21, 2009). Ground modification techniques, such as permeation grouting, columnar jet grouting, deep soil mixing, stone columns, gravel or other drains shall be implemented, and deep foundations shall be put in place to mitigate potential liquefaction -induced settlement impacts. Implementation of Mitigation Measures #3 and #4 reduce potential geology and soils impacts to a less than significant level. Hvdroloi!v and Water Oualit Site 1 is an underutilized, at -grade asphalt parking lot that releases into two -on-site storm drain inlets that collect storm water and deliver it to the City storm drain system. Site 2 is currently vacant and the runoff releases overland onto Martinez Street and Alvarado Street. Ultimately, both sites discharge into the San Pablo Bay subbasin and the San Leandro Watershed. The City of San Leandro Municipal Code regulates the discharge of stormwater and the potential for pollutant transport to water resources through Title 3: Health and Safety, Chapter 3-15 Storm Water Management and Discharge Control. Chapter 3-15 requires the best management practices (BMPs) for new development and redevelopment and compliance with BMPs where BMP guidelines or requirements have been adopted by any federal, state, regional and/or City agency (Section 3-15-215 — Reduction of Pollutants in Storm Water). Additionally, stormwater dischargers are regulated through Title 7: Maps, Buildings, and Subdivisions, Chapter 1-12 Grading, Excavations and Fills. Mitigation Measure #5: Prior to issuance of a grading permit, the project applicant must prepare and implement an erosion and sediment control plan (ESOP) including interim and permanent erosion and sediment control measures, as well as a pollutant control plan (PCP). Mitigation Measure #6: Prior to issuance of a grading permit, the project applicant shall file the required documentation with the State Water Resources Quality Board and prepare a Storm Water Pollutant Prevention Plan (SWPPP) which will be reviewed and