Still no word on toxins dumped on North End greenway during historic flood

I believe that these young trees on the Downtown Connector and Magdeburg/Morgan Park Greenways show evidence that some chemical or fuel substance washed across the park land with the flood. These rings, rising as high as 3 feet on some trees, are traces to me that raise questions about whether the Greenways are actually safe to use (click on photos to enlarge).




I've tried to find out from Metro government officials if tests were conducted to identify toxins might have flooded from industrial East Germantown on May 2 and 3, but I cannot get a direct answer.