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Ponderosa Homes at 6900 Valley Trails Drive Initial Study and Negative Declaration site. Potentially unstable soils discovered during excavation are required by provisions of the California Building Code to be removed and replaced, or otherwise treated to provide appropriate foundation support. Weak soils would be re-engineered specifically for stability prior to construction. As a condition of approval, the project is required to comply with the recommendations of the project's geotechnical consultant, including designing foundation and drainage geotechnical aspects of the final development plans to ensure that the recommendations have been properly incorporated into the project. Therefore, the potential impact would be less than significant. b) 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, which could increase the rate of erosion if controls or best management practices are not in place. As a standard condition of approval, the project is required to meet the requirements for stormwater erosion control measures during design, construction and implementation phases of the project. Additionally, the geotechnical analysis, prepared by Cornerstone Earth Group, recommends that the project sponsor maintain specific temporary slopes, where temporary shoring is required during site preparations, to prevent erosion.9 Compliance with these recommendations are required as conditions of approval. Therefore, potential impacts would be less than significant. c) There are no known geologic hazards on the site and limited risk of landslide, lateral spreading, subsidence, liquefaction or collapse. The State of California provides minimum standards for building design through the California Building Code, including specific seismic safety requirements. State earthquake protection law requires that buildings be designed to resist stresses produced by lateral forces caused by earthquakes. As a condition of approval, the project would be required to comply with the applicable codes and standards to provide earthquake resistant design to meet or exceed current seismic requirements and mitigate any specific soil condition concerns. Therefore, the potential impact would be categorized as less than significant. d) Site explorations by Cornerstone Earth Group to prepare the geotechnical analysis generally encountered native alluvial soils to a depth of approximately 45 feet (the maximum depth explored). 10 Soils consisted of stiff 9 Cornerstone Earth Group. Geotechnical Investigation,The Village at Valley Trails Residential Development. December 19, 2014. 10 Cornerstone Earth Group, 2014. 23