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San Joaquin County Environmental Checklist Under the Alquist-Priolo Act,faults are zoned, and construction along or across them is strictly regulated if they are"sufficiently active"and"well defined." A fault is considered sufficiently active if one or more of its segments or strands shows evidence of surface displacement during Holocene time(defined for purposes of the act as referring to approximately the last 11,000 years). A fault is considered well defined if its trace can be clearly identified by a trained geologist at the ground surface or in the shallow subsurface, using standard professional techniques,criteria,and judgment(Hart and Bryant 1997). Seismic Hazards Mapping Act Like the Alquist-Priolo Act,the Seismic Hazards Mapping Act of 1990(Pub. Res. Code Section 2690-2699.6)is intended to reduce damage resulting from earthquakes. While the Alquist-Priolo Act addresses surface fault rupture,the Seismic Hazards Mapping Act addresses other earthquake-related hazards, including strong ground shaking,liquefaction,and seismically induced landslides. Its provisions are similar in concept to those of the Alquist-Priolo Act: the state is charged with identifying and mapping areas at risk of strong ground shaking, liquefaction, landslides,and other corollary hazards,and cities and counties are required to regulate development within mapped Seismic Hazard Zones. Under the Seismic Hazards Mapping Act,permit review is the primary mechanism for local regulation of development. Specifically,cities and counties are prohibited from issuing development permits for sites within Seismic Hazard Zones until appropriate site-specific geologic and/or geotechnical investigations have been carried out and measures to reduce potential damage have been incorporated into the development plans. California Building Standards Code The State of California's minimum standards for structural design and construction are given in the California Building Standards Code(CBSC)CCR Title 24. The CBSC is based on the UBC(International Code Council 1997), which is used widely throughout the United States(generally adopted on a state- by-state or district-by-district basis),and has been modified for California conditions with numerous,more detailed,and/or more stringent regulations. The CBSC requires that"classification of the soil at each building site shall be determined when required by the building official"and that"the classification shall be based on observation and any necessary test of the materials disclosed by borings or excavations." In addition,the CBSC states that"the soil classification and design-bearing capacity shall be shown on the(building)plans, unless the foundation conforms to specified requirements." The CBSC provides standards for various aspects of construction,including but not limited to excavation,grading,and earthwork construction;fills and embankments; expansive soils; foundation investigations;and liquefaction potential and soil Notice of Preparation for the June 2006 North County Recycling Center and Sanitary Landfill 2-41 Permit Revision J&S 06307.06