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Geotechnical Investigation Report and Peer Review A site specific Preliminary Geotechnical and Geologic hnvestigation report was prepared by TRC Lowney and a Geotechnical and Geologic Investigation report was prepared by Cornerstone, a geotechnical consulting firm. The reports identified regional seismic faults and stated that although the Verona Fault is appro:Kimately 0.4 miles northeast of the project site, it is not considered capable of generating; large earthquakes. The site is not located within an Alquist-Priolo Earthquake Fault Zone as delineated by the California Division of Mines and Geology. T'he State of California provides minimum standards for building design through the California Building Standards Code. The California Uniform Building Code is based on the LJBC and has been modified for California conditions with numerous more detailed and/or stringent regulations. Specific seismic safety requirements are set forth in Chapter 23 of the UBC. The State earthquake protection law requires that buildings be designed to resist stresses produced by lateral forces caused by earthquakes. The City implements the requirements of the California Code through its building permit process. The project will be required to comply with the applicable codes and standards to provide earthquake, resistant design to meet or exceed the current seismic requirements. The Cornerstone report investigated four debris flow-type landslides along the west and west facing slopes of the eastern ridge. The report found that these landslides appear to be relatively shallow. As shown on the proposed development plan, there is no development proposed on the southwestern portion of the site. This portion would be designated as open space. Thus, the landslides that underlay the southwestern corner of the project site are not likely to impact the proposed development. The Cornerstone report also analyzed the site conditions in areas of slope stability, landslide mitigation, removal of existing fill, subgrade preparation, site drainage, erosion control, etc. Natural erosion is frequently accelerated by human activities such as site preparation for construction and alteration of topographic features. Grading, vegetation removal, as well as excavation and trenching for utility lines will disturb soils that could increase the rate of erosion if controls or best management practices are not in place. The City requires that all projects meet the requirements for stormwater control measures during design, construction and implementation phases of the project. The Cornerstone report was peer reviewed by Alan Kropp and Associates, one of the City geotechnical consultants, who concurred with the report conclusions. Recommendations in site preparation and construction were included in the report and peer review comments. These recommendations are recommended conditions of project approval. Case No. PUD-77 Planning Commission Page-8-