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O NE B RO A D WA Y P LA Z A P RO J E CT E I R A D DE N DU M CI T Y O F S A NT A A NA 5. Environmental Analysis Page 68 PlaceWorks Environmental Issues Substantial Change in Project Requiring Major EIR Revisions Substantial Change in Circum-stances Requiring Major EIR Revisions New Information Showing New or Increased Significant Effects Less Than Significant Impact/No Changes or New Information Requiring Preparation of an EIR No Impact a) Result in the loss of availability of a known mineral resource that would be a value to the region and the residents of the state? X b) Result in the loss of availability of a locally important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan? X For the purpose of CEQA analysis, mineral resources refer to aggregate resources that consist of sand, gravel, and crushed rock. Aggregate resources provide bulk and strength in construction materials such as portland cement and asphaltic concrete. Other nonfuel mineral resources include metals such as gold, silver, iron, and copper and industrial metals such as boron compounds, rare-earth elements, clays, limestone, gypsum, salt, and dimension stone. The California Geological Survey (CGS) classifies the regional significance of mineral resources in accordance with the California Surface Mining an d Reclamation Act (SMARA) of 1975. The State Geologist is responsible for classifying areas within California that are subject to urban expansion or other irrevers ible land uses. SMARA also allowed the State Mining and Geology Board (SMGB), after receiving classification information from the State Geologist, to designate lands containing mineral deposits of regional or statewide significance. Classification into MRZ is completed by the State Geologist in accordance with the SMGB’s priority list and according to the presence or absence of significant mineral resources. Of the four MRZ categories, lands classified as MRZ-2 are of the greatest importance. Such areas are underlain by demonstrated mineral resources or are located where geologic data indicate tha t significant measured or indicated resources are present. MRZ-2 areas are designated by SMGB as being “regionally significant.” Such designations require that a lead agency’s land use decisions involving designated areas be made in accordance with its mineral resource management policies (if any exist) and that it consider the importance of the mineral resource to the region or the state as a whole, not just to the lead agency’s jurisdiction. The MRZ-1 zone depicts areas where adequate geologic information indicates that no significant mineral deposits are present, or where it is judged that little likelihood exists for their presence. MRZ -3 indicates areas of undetermined mineral resource significance. 5 - 122