In this August 2012 photo provided by the North Dakota Health Department workers expand a special landfill for oilfield waste near Sawyer, N.D. State Health Department data show the amount of so-called oilfield special waste has increased nearly 5,100 percent in the past decade, to more than 512,000 tons last year. Health officials say more than a dozen special landfills are proposed to keep pace with the state’s booming oil production. (AP Photo/Courtesy North Dakota Health Department)

Associated Press
In this August 2012 photo provided by the North Dakota Health Department workers  expand a special landfill for oilfield waste near Sawyer, N.D.  State Health Department data show the  amount of so-called oilfield special waste has increased nearly 5,100 percent in the past decade, to more than 512,000 tons last year. Health officials say more than a dozen special landfills are proposed to keep pace with the state’s booming oil production. (AP Photo/Courtesy North Dakota Health Department)
In this August 2012 photo provided by the North Dakota Health Department workers expand a special landfill for oilfield waste near Sawyer, N.D. State Health Department data show the amount of so-called oilfield special waste has increased nearly 5,100 percent in the past decade, to more than 512,000 tons last year. Health officials say more than a dozen special landfills are proposed to keep pace with the state’s booming oil production. (AP Photo/Courtesy North Dakota Health Department)
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