A new report says Cook County highway workers have been dumping roadway and sewer waste at two Chicago area work yards, which could be contaminating the environment.
The report was released Wednesday by Cook County Inspector General Patrick Blanchard and is based on site inspections in October and November.
The report says the pollutants include gasoline, oil and other chemicals collected by workers while sweeping roadways and cleaning sewers. It says the toxins were then dumped in huge piles in Riverdale and Palatine that could cause runoff and contaminate surrounding soil and sewage systems.
Cook County Board President Toni Preckwinkle says her office is putting the whole process under review.
Blanchard's report also found that the highway department used a limited supply of interchangeable equipment to pass safety inspections.