The scrap-metal operation Sims Metal Management is being ordered by federal officials to install air monitors at its sprawling Pilsen operation to determine whether the business is spewing high levels of toxic metals and other harmful contaminants into the air.
Sims, which has long operated along the Chicago River at 2500 S. Paulina St., was sued by the state last year for allegedly failing to show that it is containing pollution from its site. The business is seeking state and city permits to continue operating and also to build equipment with more effective pollution controls.