financial disparity created by the disappearance of manufacturing from the city in part contributed to the Waukegan riot of 1966. Central to this event and the remainder of Waukegan's 20th century history was Robert Sabonjian, who served as mayor for 24 years, and earned the nickname the "Mayor Daley of Waukegan" for his personal and sometimes controversial style of politics. Geography Waukegan is located at (42.3703140, −87.8711404). Waukegan is on the shore of Lake Michigan, about south of the border with Wisconsin and north of Downtown Chicago at an elevation of about above sea level. Chicago has two major streets that venture north to Waukegan, one being Sheridan Road, which extends north from Diversey Parkway in Lincoln Park. The second street is Milwaukee Avenue, which starts at the intersection of Desplaines street and Kinzie street in Downtown Chicago. According to the 2010 census, Waukegan has a total area of , of which are land and , or 0.99%, are water. Major streets Skokie Highway Waukegan Road Belvidere Road Green Bay Road Grand Avenue Sheridan Road/Amstutz Expressway Lewis Avenue Washington Street Genesee Street Climate Waukegan is located within the humid continental climate zone (Köppen: Dfa) with warm to hot (and often humid) summers, and cold and snowy winters. The record high temperature is , which was set in July 1934, while the record low is , set in January 1985. Waukegan's proximity to Lake Michigan helps cool the city throughout the year. Superfund sites Waukegan contains three Superfund sites of hazardous substances that are on the National Priorities List. In 1975, PCBs were discovered in Waukegan Harbor sediments. Investigation revealed that during manufacturing activities at Outboard Marine Corporation (OMC), hydraulic fluids containing PCBs had been discharged through floor drains at the OMC plant, directly to Waukegan Harbor and into ditches discharging into Lake Michigan. The OMC plants were subsequently added to the National Priorities List, and was designated as one of 43 Great Lakes Areas of Concern. Cleanup of the site began in 1990, with OMC providing $20–25 million in funding. During the OMC cleanup, additional soil contaminants were found at the location of the former Waukegan Manufactured Gas and Coke company. Soil removal was completed at the Coke site in 2005, and cleanup of that soil will continue for several years. The Johns Manville site is located one mile (1.6 km) north of the OMC site. In 1988, asbestos contamination