Video above from April 11, 2010. Anderson died of glioblastoma multiforme (brain tumor) November, 2011 Just found this on the EPA Region 8 site here under What's New which was updated October 2012
North Area Response Action: The organic compound 1,4-dioxane has been detected, at concentrations slightly higher than the Colorado groundwater standard, in groundwater monitoring wells up to 2.4 miles north of the Lowry Landfill site. The EPA has evaluated the health risk associated with public exposure to 1,4-dioxane at these concentrations north of the site and found no significant health risk associated with surface water or groundwater. The extent of the groundwater plume has been determined through a groundwater investigation conducted by the City and County of Denver and Waste Management of Colorado under oversight by the EPA, Colorado Department of Public Health and Environment and Tri-County Health Department.
Denver and Waste Management have implemented a groundwater extraction and treatment response action immediately north of the Lowry Landfill site to minimize the potential for additional contaminant mass to migrate northward beyond Section 31 (located within a one-square-mile area immediately south of Yale Avenue). Several groundwater extraction wells in the area of the plume are currently extracting contaminated groundwater, which is being conveyed to the on-site wastewater treatment plant via a pipeline. The wastewater treatment plant treats the collected groundwater, along with other site groundwater, then discharges the treated water to the sanitary sewer system for additional treatment at the metro and Aurora municipal wastewater treatment plants. Denver and Waste Management are continuing to monitor groundwater in the area of the plume to ensure response action objectives continue to be met and to monitor concentration trends. Additional extraction wells will be added as necessary.
Don't be fooled. When they use the words "treated" or "treatment" they don't mean removed. Often the "treatment" has no effect on the toxic substance in question.