Superfund Site | 19th Avenue Landfill

EPA #: AZD009004177

Superfund National Priority List (NPL) Status: The EPA listed this site on Oct. 4, 1989

Location

The 19th Avenue Landfill site is located in an industrial area of Phoenix, Arizona at the southeast corner of 19th Avenue and Lower Buckeye Road. The site covers 213 acres of land, of which the major part containing 200 acres is referred to as Cell A, and located on the north side of the Salt River channel. The remainder of the landfill Cell A-1 is located south of the river channel.

Contaminants of Concern

The current contaminants of concern in groundwater include very low levels of volatile organic compounds (VOCs), and heavy metals including arsenic, barium, mercury, and nickel.  Currently, arsenic continues to exceed the water quality standards on the site. Contaminants of concern at the site may change as new data become available. Sampling of soil and refuse in the landfill indicated that the contents of the landfill are similar to those expected in municipal landfills; however, industrial wastes were also disposed at the site.

Public Health Impact

The baseline risk/health assessment prepared by the Agency for Toxic Substances and Disease Registry indicates that the groundwater flowing underneath the landfill is not considered to be a threat to public health. Groundwater in the area is used for industrial purposes only; it is not used as drinking water. Potential and future groundwater impacts will be mitigated by the groundwater contingency plan. Therefore, there will be no exposure pathway through any drinking water supplies.

The area's primary drinking water is provided by COP water distribution system. The municipal system draws water from groundwater and surface water sources over thirty miles away. The nearest drinking water supply well is over three miles away. An industrial well and a down gradient agricultural well are located 200 feet and 800 feet, respectively, from the Site. However, there is no known contamination of these wells at this time. Ambient air quality monitoring indicates no apparent risk to human health from landfill gas emissions.