Site Assessment & Cleanup
Overview - General Information
The Aerojet Superfund Site is in eastern Sacramento County adjacent to the City of Rancho Cordova and south of the City of Folsom. Aerojet came to establish a facility at the location in 1950, commencing operations in late 1951. Waste Discharge Requirements governing discharges from Aerojet’s site operations were initially adopted in 1952 (Resolution No. 127). Primary activities at the site were manufacturing and testing of solid and liquid rockets and chemical manufacturing. These activities used many chemicals, including solvents such as trichloroethene (TCE), tetrachloroethene (PCE), freon, and chloroform; solid rocket propellant – mostly ammonium perchlorate; and liquid rocket propellants such as hydrazine and kerosene. These activities led to the discharge, leakage, and spillage of these contaminants to soil, groundwater, and air. In 1982 the site was added to the first Superfund List. Investigation is being conducted pursuant to a Partial Consent Decree and remedies are conducted pursuant to Record of Decision documents. This process is overseen by the United States Environmental Protection Agency, California Regional Water Quality Control Board – Central Valley Region, and Department of Toxic Substances Control (Agencies).
The overall site consists of approximately 350 potential source areas in various stages of investigation and remediation. For ease of investigating and remediating, the site is divided into operable units (OUs): Western Groundwater (OU-3), Area 41 / Cavitt Ranch (OU-4), Perimeter Groundwater (OU-5), Boundary (OU-6), Island (OU-7), Eastern (OU-8), Central (OU-9), and Area 40 (OU-10). Investigation and cleanup of the OUs are conducted pursuant to a schedule approved by the Agencies.
Below you will find links to status updates which describe recent activities at the site. You will also find links to recent reports and groundwater contaminant plume maps. There is also a link to the Aerojet Superfund Site GeoTracker page, which provides access to the Aerojet documents currently uploaded to GeoTracker.
For more information, please contact Geoff Rader at Geoff.Rader@waterboards.ca.gov or by phone at (916) 464-4707.
Aerojet Rocketdyne Updates
The links above provide updates on recent activities at the Aerojet Superfund Site. Future updates will occur on approximately an annual basis.
Aerojet Rocketdyne Documents and Resources
- 2022 Groundwater Monitoring Plan Update
- 2021 (October) Groundwater Maps
- 2021 USEPA Second Five Year Review Report
- 2021 Annual Vapor Intrusion Field Investigation Report
- 2018 OU-10 Remedial Action Plan
- 2015 OU-6 Record of Decision
- 2011 OU-5 Record of Decision
- 2001 OU-3 Record of Decision
- GeoTracker Site-Wide Documents