MO 2001-036 to 2001-040 - Laserfiche WebLink

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POTENTIALLY ISSUES POTENTIALLY SIGNIFICANT SIGNIFICANT LESS THAN NO UNLESS SIGNIFICANT IMPACT SOURCES ISSUES MITIGATION RAPACT INCORPORATED Rupture of a known earthquake fault, as X 11 delineated on the most recent Alquist Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other substantial evidence of a known fault? ii) Strong seismic kround shaking? X 11 iii) Seismic -related ground failure, including li uefaction? X 11 iv) b. Landslides? Result in substantial soil erosion or the loss of X I 11 topsoil? Be on a geologic unit or soil that is X i l C. -located unstable, or that would become unstable as a result of the project, and potentially result in on- or off -site landslide, lateral spreading, subsidence, liquefaction or collapse: 11 d. Be located on expansive soil, creating X substantial risks of life or roe 7 X 2,13 e. Have soils capable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the di osal of wastewater? 11 f. Any increase in wind or water erosion of soils, X I either on- or off -site? X 11 g. Changes in deposition or erosion of beach, sands, or changes in siltation, deposition or erosion which may modify the channel of a river or stream or the bed of the ocean or any bay, inlet or lake? EXPLANATION: The project area is located within the seismically -active Bay Area, with several faults located within 3-16 miles of the project site, although the area is not included in an Alquist-Priolo Special Studies Zone. Therefore, it is likely that during the lifetime of any future residences constructed on the project site, they will be subject to seismic shaking and other earthquake -induced effects. The Uniform Building Code requires new building construction to meet requirements for construction in earthquake -prone areas, which is intended to minimize any potential impacts related to seismic events. The project site is currently served by sewers for disposal of wastewater. Future home development will be required to connect to the City's sewer system, therefore impacts and related to soils types and septic tanks are not applicable. San Leananal sis of hazardous mato Creek acts as the erials on-siteern site indicate that a depth of development within its proximity could result in erosion of soils. Preliminary y between 1-5 feet of soil will be required to be removed from the site, which could have echnlre Wort (included t impacts as an appendix) which in the vicinity of San Leandro Creek. The applicant has submitted a preliminary g P and a low indicates that the site has a low to moderate potential for report liquefaction; that moderate project -level level final report beh potential for ansive prepared,;which would _ potential for differential compaction. The preliminary investigate the potential for liquefaction further, and would also evaluate the potential for lateral spreading. The report also recommends on a preliminary basis, that buildings be set back a minimum of 20 feet from the crest of the existing creek bank. This setback distance would likely be adequate to mitigate potential impacts caused by localized liquefaction -induced settlement or creek bank instability (once soils removal has occurred). The following mitigation �ngmeasures to a are than significant n order to reduce potentially significant impacts related to on -site soils, bank stability, and grading Freda Street Homes - Initial Study Checklist 4 January 2001 `76