18.08.194 Seismic hazard areas.
Designated seismic hazard areas shall be subject to the requirements of this section. At a minimum, seismic hazard areas shall include areas of alluvial and recessional outwash surficial geologic units as identified in “Water Resources and Geology of the Kitsap Peninsula and Certain Adjacent Lands, Water Supply Bulletin Number 18, Plate One,” U.S. Department of the Interior, Geological Survey, Water Resources Division, and any lot, tract, site or parcel which has been modified by imported or excavated earthen fill material.
A. Regulation. Applications for regulated activities proposed within designated seismic hazard areas shall be accompanied by a geotechnical report prepared by a geologist or geotechnical engineer licensed as a civil engineer with the state. If it is satisfactorily demonstrated that a seismic hazard potential does not exist on the site, the requirements of this section may be waived.
B. Geotechnical Report Requirements. The required report shall evaluate the existing site conditions, including geologic, hydrologic and site capability to accommodate the proposed activity. At a minimum, the following shall be included:
1. Analysis of subsurface conditions;
2. Delineation of the site subject to seismic hazards;
3. Analysis of mitigation measures which may be employed to reduce or eliminate seismic risks, including an evaluation of the effectiveness of mitigation measures.
If a proposal is required to submit a seismic risk analysis pursuant to any requirements of the most recently adopted edition of the International Building Code by the city of Gig Harbor, the report requirements of this section may be waived by the department. (Ord. 1036 § 34, 2006).