San Francisco County Municipal Code § 2.4 Seismic Hazard

Per SFEBC Section 329.2, all evaluations are required to consider only the BSE-1E hazard. For purposes of compliance with SFEBC Section 329, the Site-Specific Procedure of Section 2.4.2 need not be used.

Per SFEBC Section 329.2, all evaluations are required to consider only the BSE-1E hazard. Seismicity parameters for the BSE-1E hazard may be obtained using the Seismic Design Maps tool available at https://www.seismicmaps.org/. For purposes of calculating seismicity parameters with the USGS tool, Site Class F need not be assumed.

Where the Site Class is known from available documents, the known Site Class should be used. Where the Site Class is not known, for purposes of compliance with SFEBC Section 329, the Site Class may be estimated from the SEAOC Seismic Design Map available at https://www.seismicmaps.org/. Unless site-specific investigations indicate otherwise, Site Class F shall be assumed for any site located within a zone of required investigation for liquefaction on the 2000 Department of Conservation map available at https://earthquake.usgs.gov/hazards/urban/sfbay/liquefaction/sfbay/. Otherwise, Site Class F need not be assumed. For purposes of compliance with SFEBC Section 329, site-specific investigation of potential Site Class F sites is not required as long as potential liquefaction is noted on the Deficiency List in the seismic evaluation report.