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Draft Environmental P Impact Report Page IV.G-2 ' p Forward Landfill Expansion construction within fault zones. It provides guidance for how active faults should be identified, defines relevant terms, and establishes an approval process for proposed buildings in active earthquake areas. The law requires the State of California to establish regulatory zones around surface traces of active faults and to issue the appropriate maps. It also requires a geologic investigation in the event of new construction, to ensure that it will not be located on a fault zone. However,the Alquist-Priolo Act only addresses hazards associated with surface fault rupture, and does not address other hazards associated with earthquakes (the Seismic Hazards Mapping Act addresses these other hazards). There are no Alquist-Priolo zones within the plan area. The Seismic Hazards Mapping Act The Seismic Hazards Mapping Act was passed in 1990 to addresses seismic hazards such as strong ground shaking, soil liquefaction, and earthquake-related landslides. This act requires the State of California to identify and map areas that are at risk for these (and related)hazards. Cities and counties are also required to regulate development in the mapped seismic hazard zones. The primary method of regulating construction in these areas is through the permit process, and a permit cannot be issued until a geological investigation is completed. Many counties, including San Joaquin County, still refer to the Seismic Hazard Zones in the seismic safety element of their general plan of 1992. However, the US Geological Survey currently considers Seismic Hazard Zones obsolete. The 1997 UCB Code was the last to use these zones. California has adopted the 2007 California Building Code, so officially these Seismic Zones are not in use expect to reference general seismic risk. The USGS directs uses a more complex mix of variables to compute"probabalistic ground motion maps", that started coming out in 2008 though these are not available for the project area yet. California Integrated Waste Management Board and Central-Valley Regional Water Quality Control Board The California Integrated Waste Management Board (CIWMB) and Central Valley Regional Water Quality Control Board(RWQCB) oversee the design elements of the waste management units (WMUs) and supporting ancillary functions -such as the materials recovery facility, soil borrow areas, composting areas, and storage and support areas-that comprise the landfill. The CIWMB and RWQCB stipulate design criteria for the proposed additional expansion area Class IT WMU native material permeability, liner and leachate collection system, and slope stability potential at the site. The landfill design must meet California Code of Regulations (CCR) Title 27 requirements. Design criteria for seismic events is provided by the California Division of Mines and Geology's (CDMG)estimates of peak horizontal ground accelerations (PHGAs) associated with active earthquake faults near enough to the site to have an impact. San Joaquin County The Public Health and Safety Element of the 2010 San Joaquin County General Plan, adopted in 1992, incorporates health and safety considerations for Seismic and Geological Hazards. In June 2008 the County began a 36-month process to update the 1992 General Plan. Relevant subsections (VI-V5) discuss the seismic and geologic hazards. Seismic hazards include earthquake-induced ground rupture, ground shaking, liquefaction, or water movement. Strong ground shaking typically results in structural damage to buildings and slope instability, and can also induce liquefaction. General geologic hazards include subsidence,erosion, expansive soils, and slope instability.