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  • Once through cooling and assembly bill 1318 studies
    The California ISO annual transmission planning process will be the main vehicle for the ISO to evaluate potential reliability impacts arising from implementation of California’s once-through cooling policy and air emission constraints in Southern California. Transmission planning studies will establish the potential reliability impacts of the State Water Resources Control Board policy that restricts the use of coastal and estuarine waters for power plant cooling. Planning studies will also address any system reliability issues associated with the lack of air permits available for new plant construction in the South Coast Air Quality Management District.