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RES 231363
City of Pleasanton
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RES 231363
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2/23/2023 9:40:18 AM
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CITY CLERK
CITY CLERK - TYPE
RESOLUTIONS
DOCUMENT DATE
2/7/2023
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AUGUSTIN BERNAL MOUNTAIN BIKE TRAIL PROJECT DRAFT INITIAL STUDY <br /> 12956 <br />DUDEK 52 April 2022 <br /> <br />Potentially <br />Significant <br />Impact <br />Less Than <br />Significant <br />Impact With <br />Mitigation <br />Incorporated <br />Less Than <br />Significant <br />Impact No Impact <br />c) Be located on a geologic unit or soil that <br />is unstable, or that would become <br />unstable as a result of the project, and <br />potentially result in on- or off-site <br />landslide, lateral spreading, subsidence, <br />liquefaction or collapse? <br /> <br />d) Be located on expansive soil, as defined <br />in Table 18-1-B of the Uniform Building <br />Code (1994), creating substantial direct <br />or indirect risks to life or property? <br /> <br />e) Have soils incapable of adequately <br />supporting the use of septic tanks or <br />alternative waste water disposal <br />systems where sewers are not available <br />for the disposal of waste water? <br /> <br />f) Directly or indirectly destroy a unique <br />paleontological resource or site or <br />unique geologic feature? <br /> <br />Setting <br />The project site is located within and adjacent to Augustin Bernal Community Park and under the jurisdiction <br />of the City of Pleasanton. There are several active faults near the project area: Calaveras, Concord Green <br />Valley, Green Valley, Greenville, Hayward, Mt. Diablo Thrust Fault, and San Andreas Faults. The Calaveras <br />Fault, which is a designated Alquist Priolo fault zone, runs along the eastern edge of the Augustin Bernal <br />Community Park, with the staging area and parking lot partially within the fault zone. The Hayward Fault, <br />located approximately 8 miles west of the park, is also a designated Alquist Priolo fault zone. As described <br />in the General Plan, the City of Pleasanton is considered to have a moderate seismic risk in terms of fault <br />hazard, seismic ground shaking, and liquefaction. Additionally, the General Plan identifies that the project <br />site is located within an area of substantial landslide susceptibility (City of Pleasanton 2005). <br />Impact Discussion <br />a) Would the project directly or indirectly cause potential substantial adverse effects, including the <br />risk of loss, injury, or death involving: <br />i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo <br />Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other <br />substantial evidence of a known fault? Refer to Division of Mines and Geology Special <br />Publication 42. <br />The California Geological Survey provides scientific information about the state’s geology, <br />seismology, and associated hazards. As part of their Seismic Hazards Program, areas
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