Section 3722 - Requirements for Mapping Seismic Hazard Zones(a) The Department of Conservation, California Geological Survey (CGS), shall prepare one or more State-wide probabilistic ground shaking maps for a suitably defined reference soil column. One of the maps shall show ground shaking levels which have a 10% probability of being exceeded in 50 years. These maps shall be used with the following criteria to define seismic hazard zones: (1) Amplified shaking hazard zones shall be delineated as areas where historic occurrence of amplified ground shaking, or local geological and geotechnical conditions indicate a potential for ground shaking to be amplified to a level such that mitigation as defined in Public Resources Code Section 2693(c) would be required.(2) Liquefaction hazard zones shall be delineated as areas where historic occurrence of liquefaction, or local geological, geotechnical and ground water conditions indicate a potential for permanent ground displacements such that mitigation as defined in Public Resources Code Section 2693(c) would be required.(3) Earthquake-induced landslide hazard zones shall be delineated as areas where Holocene occurrence of landslide movement, or local slope of terrain, and geological, geotechnical and ground moisture conditions indicate a potential for permanent ground displacements such that mitigation as defined in Public Resources Code Section 2693(c) would be required.(b) Highest priority for mapping seismic hazard zones shall be given to areas facing urbanization or redevelopment in conjunction with the factors listed in section 2695(a)(2)(A), (B), (C) and (D) of the Public Resources Code.Cal. Code Regs. Tit. 14, § 3722
1. New section filed 1-27-92; operative 2-26-92 (Register 92, No. 12).
2. Editorial correction of subsection (a) (Register 2021, No. 19).
3. Change without regulatory effect amending subsection (a) filed 5-6-2021 pursuant to section 100, title 1, California Code of Regulations (Register 2021, No. 19). Note: Authority cited: Section 2695, Public Resources Code. Reference: Section 2695(a)(1), Public Resources Code.
1. New section filed 1-27-92; operative 2-26-92 (Register 92, No. 12).
2. Editorial correction of subsection (a) (Register 2021, No. 19).
3. Change without regulatory effect amending subsection (a) filed 5-6-2021 pursuant to section 100, title 1, California Code of Regulations (Register 2021, No. 19).