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79 Livermore. Because of the high level of seismic activity in and around Livermore, the area has been classified as seismic risk Zone 4 by the California Building Code, which is the highest risk category. The Greenville Fault, an active fault that is the easternmost strand of the San Andreas fault system in the San Francisco Bay region, is located approximately four miles to the east of downtown Livermore. Each of the three segments of the Greenville Fault is considered capable of generating earthquakes in the range of Richter magnitude 6.6 to 6.9. If all segments were to rupture in a single seismic event, a 7.2 magnitude earthquake would be expected. The United States Geologic Survey estimates a 6% probability of a 6.7 magnitude or greater earthquake on the Greenville Fault during the period 2000 to 2030. The Las Positas Fault, which is considered to be active, is located approximately 2.5 miles to the southeast of downtown Livermore. The Las Positas Fault could potentially generate an earthquake of Richter magnitude 6.3. In addition, several other major active faults are located in the vicinity of Livermore, including the Calaveras and Hayward faults. In addition, the Livermore Fault is considered to be potentially active and capable of generating an earthquake with moment magnitude of 6.2. Finally, there is a structural trend of folds and thrust faults in the hills north of Livermore, the largest of which is the Mount Diablo anticline; the Mount Diablo anticline presents the potential for an earthquake with a magnitude of 6.7 with a 4% probability of occurring during the period 2000 to 2030. An earthquake on the fault would not be expected to cause fault rupture at the surface. However, strong ground shaking would be expected within the Livermore area during such an earthquake. Pleasanton. The active faults in or near Pleasanton include the Calaveras, Concord-Green Valley, Greenville, Hayward, Mt. Diablo Thrust, and San Andreas Faults. The Calaveras and Verona Faults are the only faults within the Planning Area that the State currently designates as Alquist-Priolo Earthquake Fault Zones. DSRSD. City of Dublin: According to the Seismic Safety and Safety Element of the City of Dublin’s General Plan, the Calaveras Fault is the major active fault in the Dublin planning area. The Pleasanton Fault, near the west edge of Camp Parks, is difficult to locate precisely. The State has established Alquist-Priolo Special Studies Zones along both faults, requiring detailed studies of rupture hazards prior to construction. Few potential building sites within the City of Dublin or the extended planning area are without geologic impact or hazard. The hazard may be actual, such as an active landslide or proximity to an active fault, or potential, such as a proposed cut that might activate a landslide. City of San Ramon: According to the Safety Element of the City of San Ramon’s General Plan 2020, the major active fault with rupture potential is the Calaveras Fault. The California Legislature has established an Alquist-Priolo Earthquake Fault Zone along the fault, requiring detailed studies of rupture hazards prior to construction. Two smaller faults, the Dublin Fault and the Bollinger Fault, also traverse portions of the City and its Sphere of Influence. While these faults are not regarded as active, evidence is inconclusive. Minor, presumed