The Sherwin-Williams Company v. Environmental Protection Agency / Graham Paint & Varnish Co. Inc. v. Environmental Protection Agency / General Paint & Chemical Company v. Environmental Protection Agency / Enterprise Paint Manufacturing Company v. Environmental Protection Agency / Armstrong Paint Company v. Environmental Protection Agency / Jewel Paint & Varnish Company v. Environmental Protection Agency / The Valspar Corporation v. Environmental Protection Agency / NL Industries, Inc. v. Environmental Protection Agency