EPA consent order

The U.S. Environmental Protection Agency (EPA) issued Arbor Hills Landfill a consent order on May 4, 2017. View the order
Our attorney offered the comments below.

  • Background: In general, odor from landfills is caused by the decomposition of buried, organic material, such as food. When decomposition of this type of material occurs, it creates gases with specific, odor-causing chemicals such as sulfides and ammonia.
  • Odor control at Arbor Hills Landfill: Arbor Hills operates 300 gas wells that collect landfill gas and sends it to one of two control systems. Some landfill gas is sent to a gas-to-energy plant that consists of 4 turbines that are used to generate electricity. The gas-to-energy plant is the primary control device for landfill gases. Any additional landfill gas is sent to one of 3 flares.
  • Compliance plan: Arbor Hills Landfill, as part of the consent order, has agreed to perform work to improve its landfill gas collection system according to a compliance plan. Specifically, the compliance plan requires Arbor Hills Landfill to do the following:
    • Add a flare to burn off any odor-causing chemicals from landfill gas that is released.
    • Improve system to control condensation from landfill gases.
    • Install a special type of well (referred to as a caisson well) to collect landfill gases in active landfill areas.
    • Accelerate the installation of final cover on some areas of the landfill.
    • Conduct studies of related to landfill gas.
  • Revisions to plan: The consent order provides that the compliance plan may need to be updated to ensure compliance with the Clean Air Act. It’s important to note that the consent order allows the EPA to revise the compliance plan to ensure that Arbor Hills Landfill will operate in compliance with the Clean Air Act. Under the existing schedule for the compliance plan, Arbor Hills Landfill will continue to perform work to improve its landfill gas systems through the end of 2017.