Superfund Information Systems: Site Profile

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About the Superfund Redevelopment Initiative

This nationally coordinated effort provides EPA and its partners with a process to return Superfund sites to productive use. Learn more at Superfund Redevelopment Initiative.

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Redevelopment at the Site

The Motorola, Inc. (52nd Street Plant) Superfund site is located in Phoenix, Arizona. EPA defines the site generally by the extent of impacted groundwater that underlies a 7-mile stretch spanning from downtown Phoenix to just east of Sky Harbor Airport. Land use includes a mixture of residential, commercial and industrial uses. The former Motorola 52nd Street Plant, a 90-acre closed semiconductor manufacturing plant, is located within the site. The Honeywell International facility, a 118-acre aerospace manufacturing plant is also located within the site. In 1982, Motorola discovered an underground storage tank leaking at its facility. Further investigations identified soil and groundwater contaminated with a variety of solvents that Motorola used in its semiconductor manufacturing operations. EPA added the site to the Superfund program’s National Priorities List (NPL) in 1989. Motorola (now Freescale Semiconductor) began operating one groundwater treatment system in 1992. Motorola and Honeywell International began operating another groundwater treatment system in 2001. Motorola also treated contaminated soil in 1996 and 1997. Since 2011, EPA and Freescale have conducted a residential vapor intrusion investigation and installed mitigation at 15 residences in Operable Unit 1. The former Motorola facility vapor intrusion investigation will begin in 2015.  Separately, the OU2 residential vapor intrusion investigation will begin in 2015. EPA, the State and the site parties are also evaluating other potential sources of contamination. EPA’s cleanup will allow the mixture of commercial, residential and industrial land use to continue during cleanup activities.

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Economic Activity at the Site

As of December 2019, EPA had data on 25 on-site businesses. These businesses employed 1,776 people and generated an estimated $494,005,919 in annual sales revenue. View additional information about redevelopment economics at Superfund sites.

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