As the Sandy Fire approached the Santa Susana Field Laboratory in May, state and local officials had to move quickly to assess how safe the air was amid radiation concerns as the fire burned a quarter mile from the contaminated area.By Steven Rodas, Nina DietzAs a wildfire in May approached the site of one of the worst nuclear meltdowns in U.S. history, state and local officials scrambled to respond to the blaze and to establish proper real-time radiation and air monitoring to protect Southern California families, internal emails show.