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