The federal government has opened a criminal probe of Chevron’s oil refinery in Richmond, California, after discovering the company funneled pollutants away from monitoring equipment and instead burned them off into the sky. The discovery came at the same facility where a massive fire sparked blazing fires and a health scare for surrounding residents last month. The alleged rerouting of the pollutants meant federal monitors have had no way of knowing how much pollution was emitted into the air and toward residents living downwind from the plant.