After canceling their Saturday evening card due to potential threats posed by a chemical leak at a local aerospace manufacturing plant, Los Alamitos is scheduled to race Sunday. The mixed card begins 5:45 pm. On Thursday, a large, pressurized tank filled with thousands of gallons of methyl methacrylate-a toxic, highly flammable chemical used in the manufacture of resins and plastics-began leaking. The tank at GKN Aerospace in Garden Grove, Orange County, sits about 3.5 miles from Los Alamitos as the crow flies. Officials originally outlined two possible outcomes from the...