Pacific Southwest, Region 9: Superfund
Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations
EPA #: CAD980737613
Congressional District: 05
Other Names: City of Sacramento Dump Associated Metals PG&E Power Plant
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Description and History
NPL Listing History
NPL Status: Deleted
Proposed Date: 12/30/82
Final Date: 09/08/83
Deleted Date: 09/10/91
The Jibboom Junkyard site is approximately 9 acres in size, although roughly 7 acres have been covered by an interstate highway. A former electric generating plant immediately north of the Jibboom site covers approximately 2 additional acres which have been addressed by State cleanup actions. The site, formerly owned by the Associated Iron and Metals Company, began operations in 1951. Operations included metal salvaging of a variety of materials such as railroad cars, army tanks, batteries, and electric transformers. Some scrap metal debris was disposed of on site, and transformer oil was poured onto the ground. Operations ceased in 1965, the same year the California Department of Transportation purchased the property. Following cleanup of the contaminated soil, the 2.3-acre uncovered section of the site used by the original salvage yard has been transformed into a city park along the Sacramento River, the Robert T. Matsui Riverfront Park. State cleanup actions of the property north of Jibboom Park included removal of underground storage tanks and contaminated soil and fencing of some area around an historic old electric power generating plant. Approximately 10,000 people live within one mile of the site as of 2007. The bicycle path adjacent to the site receives regular traffic during the week as a route to and from work. The city's drinking water is taken from the river along the western edge of the site. The river also is used for recreation and irrigation, and the levee along the river is a paved regional bike path. The site is in the flood plain for the Sacramento River.
The successful return of the clean Site for use as the Robert T. Matsui Riverfront Park has been acknowledged as an example by EPA. Please click here to access this Return to Use Initiative Fact Sheet.
Contaminants and Risks
- Soil and Sludges
Groundwater and soil were found to be contaminated with various pesticides/herbicides and volatile organic compounds (VOCs). Coming into direct contact with or accidentally ingesting contaminated soil or groundwater may have posed a potential threat to human health before EPA's cleanup action.
Because the site was considered available for unrestricted access and unrestricted use after completion, no post-cleanup review was required. Region IX elected to complete a discretionary Five-Year Review after the City of Sacramento approved preliminary development plans in that could increase residential land-use in the vicinity of the site. The 2007 review (attached below) concluded that the remedy at Jibboom Junkyard remains protective of human health and the environment because residual concentrations measured in the soil are within the risk range for residential use. EPA worked with the California Department of Transportation (CalTrans) regarding the portions of the site buried beneath the elevated freeway built in 1965. CalTrans implemented the recommended notification procedures through their maintenance alert database and underground services alert system (see attached 9/11/2008 memorandum).
Entire Site: In 1983, the site was fenced and soil samples were collected.
From 1985 to 1987, over 11,000 cubic yards of contaminated soil were excavated and removed to an approved hazardous waste disposal facility.
Deletion from the National Priorities List: The site was deleted from the NPL in September of 1991. Cleanup goals specified in Records of Decision have been met, institutional controls are in place, and all required reports and records are completed. Only operations and maintenance activities, if any, remain. EPA concluded that the cleanup levels of the soil at the site of the current Jibboom Park remain protective of human health and the environment, and it remains available for unrestricted use and unlimited access. (UU/UE [Unlimited Use/Unrestricted Exposure])
In 2007 EPA conducted a 5 Year Review, which involved review of soil and groundwater data from the Remedial Action, statistical analysis of the distribution of contaminants in soil throughout the remediated portion of the site, and consideration of current information on the toxicity of lead and PCBs. EPA also inspected the site and conducted a series of interviews and discussions with managers, planners and regulators involved in the site and the surrounding area. The Park District landscaping which increased the clean cover material over the formerly-contaminated soil was commended for providing additional protectiveness. Information available to EPA at the time of the ROD indicated that substantial soil contamination of lead and PCB in the CalTrans right-of-way was unlikely, but this conclusion was not confirmed by sampling. Although there was no new information for the portion of the site currently part of the Interstate 5 right-of-way, EPA recommended that the property manager, California Department of Transportation (CalTrans), use existing management systems (such as the maintenance alert database and underground services alert system) to allow future managers and construction workers to identify the potential for encountering subsurface soil contaminated with lead and PCBs. In 2008, EPA noted that this management system was working satisfactorily (see attached 9/11/2008 Memorandum).
To review the Administrative Record file for the Jibboom Junkyard site, please feel free to call the Superfund Records Center at (415) 820-4700. The Administrative Record is EPA's official collection of data, reports and other information that the EPA considered or relied on in making its decision on the selection of a removal or remedial action for cleaning up the site.
Cleanup Results to Date
The removal of contaminated soil and fencing has eliminated the potential of exposure to hazardous materials at the Jibboom Junkyard site. All cleanup measures have been proven effective and the site was deleted from the NPL in September of 1991.
Potentially Responsible Parties
Potentially responsible parties (PRPs) refers to companies that are potentially responsible for generating, transporting, or disposing of the hazardous waste found at the site.
Online information about the PRPs for the site is not yet available.
Documents and Reports
Public Information Repositories
The public information repositories for the site are at the following locations:
Contact the Region 9 Superfund Community Involvement Section,
75 Hawthorne Street,
San Francisco, CA 94105
EPA Site Manager
75 Hawthorne Street
San Francisco, CA 94105
EPA Community Involvement Coordinator
75 Hawthorne Street
San Francisco, CA 94105
EPA Public Information Center
Department of Toxic Substances Control,
8800 Cal Center Drive
Sacramento, CA 95826-3200
Department of Transportation,
Office of Hazardous Waste and Noise,
PO Box 942874
Sacramento, CA 94274-001
After Hours (Emergency Response)