This story was originally published by ProPublica. Before his shift at the Goodyear Tire and Rubber plant in Niagara Falls in May 2021, a worker peed in a cup. Before he clocked out, he did it again. Goodyear shipped both specimens to a lab to measure the amount of a chemical called ortho-toluidine. The results, reviewed by ProPublica, showed that the worker had enough of it in his body to put him…