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KLE/NFEL®ER Bright People.Right Solutions. is slow, and the water erosion hazard is slight. The shrink-swell potential of this soil is high. The Jacktone-Urban land complex is not designated as a "Prime" soil for agricultural purposes. There are no active or potentially active faults located in the project vicinity. The Stockton area is subject to seismic shaking from fault features located to the east and west, and, shaking intensities resulting from Maximum Credible Earthquakes on these faults may reach Modified Mercalli Intensity IX in Stockton. Seismic activity at Intensity IX can break underground pipes, damage foundations, and shift buildings off foundations (Alfons, 1973). New construction must conform to Zone 3 requirements of the City's adopted Uniform Building Code, which requires "earthquake-resistant" construction methods. There are no other known geologic hazards that would affect the site. Since the project site is not located near any water source, the site is not subject to liquefaction hazards, nor subject to seiches or tsunamis. Due to the flat topography of the area, the project site is not subject to landslide hazards. The project would be connected to the City's sewer system; therefore, soil capability of supporting septic systems is not an issue. Environmental Impacts Impacts on Soils and Geology Potentially significant effects of the project include exposure to structural damage from seismic activity, as are most buildings in Stockton. However, such exposure would be reduced to less than significant by implementation of Uniform Building Code seismic safety provisions. The project would result in minor soil erosion resulting from loosened soils during construction activities. Utilization of standard construction practices to control on-site soil erosion during project implementation is required by the City of Stockton's Storm Water Management Plan and associated ordinances. Among other things, the project plan would need to include an Erosion Control Plan and a Stormwater Pollution Prevention Plan. These requirements, which would reduce potential erosion effects to a less than significant level, are discussed and applied to the project in Section 8, Hydrology and Water Quality, and are incorporated in the mitigation measures below. The project would be located on expansive soils. Soils with high shrink-swell potential could damage building foundations and other structural components. The identified impacts associated with expansive soils would be reduced to a less than significant level with the mitigation measures recommended below. Level of Significance: Potentially significant. Mitigation Measures: 121339/ST011 R226 3-30 October 14, 2011 Copyright 2011 Kleinfelder