// CODE SNIPPET
1803.7 Geohazard Reports
Go To Full Code Chapter
[OSHPD 1R, 2 & 5] Geohazard reports shall be required for all proposed construction.
Exceptions:
- Reports are not required for one-story, wood-frame and light-steel-frame buildings of Type V skilled nursing or intermediate care facilities construction and 4,000 square feet (371 m2) or less in floor area, not located within Earthquake Fault Zones or Seismic Hazard Zones as shown in the most recently published maps from the California Geological Survey (CGS); nonstructural, associated structural or voluntary structural alterations and incidental structural additions or alterations, and structural repairs for other than earthquake damage.
- A previous report for a specific site may be resubmitted, provided that a reevaluation is made and the report is found to be currently appropriate.
The purpose of the geohazard report shall be to identify geologic and seismic conditions that may require project mitigations. The reports shall contain data which provide an assessment of the nature of the site and potential for earthquake damage based on appropriate investigations of the regional and site geology, project foundation conditions and the potential seismic shaking at the site. The report shall be prepared by a California-certified engineering geologist in consultation with a California-registered geotechnical engineer.
The preparation of the geohazard report shall consider the most recent CGS Note 48; Checklist for the Review of Engineering Geology and Seismology Reports for California Public School, Hospitals and Essential Services Buildings. In addition, the most recent version of CGS Special Publication 42, Fault Rupture Hazard Zones in California, shall be considered for project sites proposed within an Alquist-Priolo Earthquake Fault Zone. The most recent version of CGS Special Publication 117, Guidelines for Evaluating and Mitigating Seismic Hazards in California, shall be considered for project sites proposed within a Seismic Hazard Zone. All conclusions shall be fully supported by satisfactory data and analysis.
In addition to requirements in Sections 1803.5.11 and 1803.5.12, the report shall include, but shall not be limited to, the following:
- Site geology.
- Evaluation of the known active and potentially active faults, both regional and local.
- Ground-motion parameters, as required by Section 1613 and ASCE 7.
Upcodes Diagrams
Related Code Sections
1803.7 Soils and Foundations, Geohazard Reports
[OSHPD 2] Geohazard reports shall be required for all proposed construction. Exceptions: Reports are not required for one-story, wood-frame ...
1803.7 Soils and Foundations, Geohazard Reports
[OSHPD 1R, 2 & 5] Geohazard reports shall be required for all proposed construction. Exceptions: Reports are not required for one-story, wood ...
1803A.6 Soils and Foundations, Geohazard Reports
Geohazard reports shall be required for all proposed construction. Exceptions: Reports are not required for one-story, wood-frame and light-steel ...
1803A.6 Soils and Foundations, Geohazard Reports
Geohazard reports shall be required for all proposed construction. Exceptions: Reports are not required for one-story, wood-frame and light-steel ...
1803.7 Soils and Foundations, Geohazard Reports
[OSHPD 1R, 2 & 5] Geohazard reports shall be required for all proposed construction.
Exceptions: Reports are not required for one-story ...