The Anne Arundel County Landfill (AACL) has been proposed for inclusion on the National Priorities List (NPL) of the U.S. Environmental Protection Agency (EPA). The 130-acre site is located in Glen Burnie in Anne Arundel County, Maryland. The onsite shallow groundwater aquifer (25 to 60 feet) contained heavy metals (arsenic and lead) and volatile organic compounds (1,1-dichloroethane, 1,1-dichloroethene, trans-1,2-dichloroethane, 1,1,1-trichloroethane, trichloroethylene, and vinyl chloride) at concentrations significantly above the MCLs, and PMCLGs. Inorganic compounds were not at concentrations of health concern in the deep groundwater aquifer (100 to 150 feet). However, some volatile organic compounds (1,1-dichloroethane, 1,1-dichloroethylene, 1,1,1-trichloroethane) were detected, and trichloroethylene was found at concentrations exceeding the MCL in two wells on site in the southwest quadrant. The site is considered to be of potential public health concern because of the potential risk to human health resulting from possible exposure to hazardous substances.