(1) A geotechnical report shall contain: a description of the geology of the site; conclusions and recommendations regarding the effect of geologic conditions on the proposed development and how construction will adequately protect the proposed development; opinions and recommendations of the adequacy of the site to be developed, and a determination of the impacts of the proposed development and appropriate mitigating measures.

The geotechnical report shall also certify that:

(2) Geotechnical Report Preparation. Geotechnical report shall be prepared by either (a) a geologist and a geotechnical engineer, (b) a geotechnical engineer, or (c) a civil engineer licensed in the State of Washington, who is knowledgeable of regional geologic conditions and who has professional experience in landslide and/or seismic hazard evaluation, mitigation plan design, implementation, and monitoring.

(3) The review authority may waive the requirement for the report if it is determined that the proposed development would not cause significantly adverse geological impacts, or there is adequate geological information available on the area proposed for development to determine the impacts of the proposed development and appropriate mitigating measures. Pre-existing lots or land divisions regulated by CCC Title 29, Clallam County Land Division Code, for which geotechnical plans were previously prepared may be considered to have already complied with this section unless new information such as recent geologic activity warrants a new report to be required; provided, that any new storm water best management practices that were not previously included as a part of the geotechnical report shall be incorporated.