Superfund Site | Motorola 52nd Street

EPA #: AZD009004177

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

Location: Generally between 52nd Street on the east, Palm Lane on the north, Seventh Avenue on the west and Buckeye Road on the south in Phoenix, Ariz. Because of the size of the site, it has been divided into three areas called Operable Units (OUs) in order to better manage cleanup efforts.

The site is a large area of contaminated groundwater extending from the former Motorola facility and other sources. ADEQ is the lead agency for activities in OU1 and OU2 with the exception of the vapor intrusion/indoor air investigation. Environmental Protection Agency (EPA) is the lead agency for OU3.

Contaminants of Concern: Volatile Organic Compounds (VOCs), including Trichloroethene (TCE), trichloroethane (TCA) and Tetrachloroethene (PCE). Additional contaminants of concern (COCs) may be identified in one or more of the remedial investigation/feasibility studies (RI/FS) currently being conducted at the site.

Public Health Concerns: There currently aren’t any known exposures to COCs in excess of applicable health based levels from COCs at the site. This includes studies conducted to date for groundwater, soil (surface and subsurface) and soil vapor.

In the Phoenix area, drinking water is provided primarily through surface water sources with only limited groundwater use from areas located outside the Motorola 52nd Street Superfund site. Interim remedial measures are in place to clean up groundwater and reduce the migration of contaminated groundwater.

VOCs are chemicals that change easily from liquid to vapor. The TCE and PCE vapor can travel up and into surface structures, such as residential homes and commercial buildings. This exposure scenario, known as vapor intrusion (VI), is currently being studied as a part of the RI/FS process for the site. Vapor mitigation systems have been installed where elevated TCE concentrations have been detected.