Landfill Four is coated in plastic to prevent
erosion and movement of the pollution from rain.
The yellow posts in the background mark a test well
that is used to monitor ammonium perchlorate
levels in the groundwater.
Camp Bonneville is a decommissioned military installation in Clark County. The US Army used this forested area for target practice, including the firing of missiles. The camp was also used as a munitions landfill. These buried munitions have caused a toxic underground plume of ammonium perchlorate to develop.
