Technical Support and Record Management for EPA Region IX at Multiple Superfund Sites

Adanta, through an interagency agreement with the US Army Corps of Engineers (USACE) San Francisco District, supported the US Environmental Protection Agency (USEPA) Region 9 Superfund Program. This consultancy involved assessments and technical support on an as-needed basis for four specific Superfund Sites dealing with Persistent Organic Pollutants (POPs), ranging from 6 to 21 months.

The primary objectives of the Task Orders (TOs) were to: 1) provide project management and communications, 2) manage data and review deliverables, and 3) oversee fieldwork and analyze technical reports on site conditions.

One of the projects, the Motorola Site Support TO, focused on the Motorola, Inc. (52nd Street Plant) Site (M52) in Phoenix, Arizona. Adanta oversaw Remedial Investigation (RI)/Feasibility Study (FS) activities for potentially responsible parties (PRPs) at multiple operable units (OUs) within the M52 site. This site, contaminated by volatile organic compounds, including trichloroethylene, released by Motorola and other businesses, resulted in a large groundwater plume extending over 6 miles east-west and up to 1 mile north-south. The M52 site is divided into three main area-based OUs (OUs 1, 2, and 3) with more than 30 PRPs.

Activities included project planning, community involvement, direct oversight of PRPs’ contractors, sample collection, review of technical documents, and coordination with the Arizona Department of Environmental Quality.

The ASARCO Site Oversight TO involved supporting USEPA oversight of environmental cleanup activities at the ASARCO Hayden Site in Hayden and Winkelman, Arizona. Tasks included attending meetings with USEPA and reviewing documents submitted by Responsible Parties (RPs).

The North Indian Bend Wash TO supported USEPA oversight of environmental cleanup activities at the NIBW site in Scottsdale, Arizona. Tasks involved attending Technical Committee meetings, reviewing reports and models submitted by RPs, and overseeing fieldwork.

The Aerojet Site Oversight TO supported USEPA oversight of environmental cleanup activities at the Aerojet Site in Rancho Cordova, California. This included attending phone meetings with USEPA and reviewing documents and a Sitewide Groundwater Model Update submitted by RPs.

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