Based on EPA inspection findings of improper design and operation, location within a floodplain and within or adjacent to a wetland, past CWA violation and enforcement (filling in wetlands), and uncontrolled stormwater and leachate releases, it is determined the Vega Baja MSWLF Facility may present an imminent and substantial endangerment to human health and the environment.
This UAO, which supersedes a prior UAO issued to the landowner, requires the waste disposal cease at the existing landfill cell by July 1, 2013 and that permanent closure be completed thereafter, in accordance with an EPA approved timetable. A fully compliant, limited-life new landfill cell is projected to be developed by the associated AOC Respondents to help provide resources for the landfill closure activities. The UAO incorporates specific requirements for the landowner, including groundwater monitoring, provision of closure materials, construction of stormwater retention ponds, and slope stabilization activities.