Waltham, MA - On February 23rd, a bystander noticed an oil slick coming from a storm drain under the Elm Street bridge in Waltham. Initially, Squad 5 was dispatched and tried to contain the leak. Deputy Chief Roger Hebert requested 6A and Rescue 1 to respond. Firefighters contained the leak along the Charle River with booms and blotters. The DEP was called to the scene to determine the cause and stop the leak, which appeared to be diesel fuel.