Dive Summary:

• The Air Force has proposed to spend $4.6 million to stop chemicals such as arsenic and vinyl chloride from a long-closed landfill on Scott Air Force Base in Illinois from leaking into groundwater.
• The landfill has been closed since 1977 but the Air Force spent over $20 million to properly close it with a plastic "geo-membrane" cover and soil cover last year. 
• The Air Force will present four options for cleaning up the landfill but will recommend the second cheapest option, the dechlorination of "chlorinated" volatile organic chemicals, at a cost of $140,000 annually for 30 years, or $4.6 million overall.

From the article:

"There are no current users that we're aware of the groundwater there," Lake said. "Unless something comes to light, there is no reason to believe that this contamination is going to get into anybody's drinking water."

Groundwater samples collected near the site beginning in 2009 indicated the presence of several dangerous chemicals, including trichloroethylene, vinyl chloride and arsenic, according to a report on the landfill filed with the Illinois Environmental Protection Agency.