SU0014621 - Laserfiche WebLink

Home Browse Search

MITIGATION: Proposed by Project Most of the soil disturbed by the project will eventually be stabilized by the placement of pavement, construction of buildings or revegetation for landscaping. Although erosion hazard at the site ranges from slight to none, standard best management practices to control erosion will be implemented as needed. This includes scheduling and limiting the extent of clearing, grading and trenching so as to assure that disturbed soils are stabilized prior to October 15 for each phase of construction. Topsoil will be scalped from construction pads and roads and stockpiled for later use on lawn and landscaping areas. A complete soils report will be required to be submitted to the City prior to issuance of any construction permits. GEOLOGY AND SEISMICITY EXISTING: The site is located in the center of the Great (Central) Valley of California. Geologic literature indicates as much as several thousand feet of flat-lying sedimentary rock strata underlie the site. The most recent sediments (soil ) were deposited during flood stages between natural levees associated with nearby streams and rivers. No unique geologic features have been identified at the site [5]. No- known active or inactive faults occur on or underlie the site. The inactive Stockton Fault, however, passes within approximately three miles of the site. This fault has been detected in the subsurface in deep wells associated with oil and gas exploration, but nowhere has it been observed at ground surface. The nearest known active fault is the Midway Fault, located 20 miles west of the site. The (active) Antioch Fault is located 25 miles west of the site [5]. No primary effects from a seismic event such as surface ruptures on an active fault are expected at the site. Ground shaking, a secondary effect of a seismic event, however may occur periodically. It is very unlikely that bedrock accelerations in excess of 0.25 g will be generated at the site by nearby active faults and resulting earthquakes. Therefore, damage resulting from primary and secondary effects of seismic events should be negligible, especially if structures are built in accordance with current Uniform Building Code regulations [5]. MITIGATION: No potential , significant, geologic or seismic impacts have been identified. This assumes that future structures are built in accordance with the current Uniform Building Code. No other mitigation is deemed necessary. 31