Waste Management of Illinois has opened what it says is the state's largest commercial compressed natural gas (CNG) fueling facility.

The 57,000-square-foot facility near Chicago employs 55 "slow-fuel" stations to service the company's existing fleet of 30 CNG trucks, which will soon be expanded to 80. The slow-fill procedure improves efficiency. Each truck carries about 58 diesel equivalent gallons of CNG and can haul between five and eight tons of material, similar to traditional diesel trucks, for up...