The City installed a gas collection system in 1985, a methane gas monitoring program in 1999 and an environmental monitoring program in 2003. This program currently includes:

• Gas monitoring at the north, west, and south boundaries of the site
  
• Seven surface water monitoring stations in German Mills Creek
  
• Groundwater monitoring
  
  • 10 locations with 10 wells
    
  • 2 piezometers next to the creek

The Groundwater monitoring process compares samples taken from various locations on the site:

• Background / up-gradient of the landfill
  
• Within the landfill and east-fill areas
  
• Next to German Mills Creek
  
• Down-gradient of the landfill area