How safe is safe enough? Environmental researcher Coryn Wolk explores the potential public health risks at a youth baseball field built on top of an industrial alloy production site surrounded by an oil refining complex

As Will Bunch reveals in his Daily News report today, the increasing rail transport of crude oil through the city may be a threat to public safety. In this investigation, Hidden City contributor Christopher Dougherty explores Philadelphia’s dangerous history with oil refining and transport—and contemporary industry changes that are putting increased pressure on local infrastructure