New businesses finally could rise at the former FMC Corp. chemical plant in Modesto, the site of a massive soil cleanup. From 1945 to 1984, FMC made television tubes and safety flares at the site, along Highway 99 near Kansas Avenue. It left behind unsafe levels of barium, strontium, arsenic and fuel, state officials said. The cleanup on the 45 acres was completed in 2007, but the site remains bare. FMC is working with Buzz Oates Inc., a Sacramento-based developer, on possible new uses…The FMC site also is monitored for groundwater pollution by the Central Valley Regional Water Quality Control Board.