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National Information |
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Superfund Program
Intermountain Waste Oil Refinery
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Site Type: Final NPL City: Bountiful County: Davis Street Address: 995 South 500 West Zip Code: 84010 EPA ID#: UT0001277359 Site ID#: 0800753 Site Aliases: Intermountain Oil Congressional District: 01 |
Site Update
The 2008 Five-Year Review Report has been posted in the Site Documents section.
Site Description
The Intermountain Waste Oil Refinery (IWOR) site covers about two acres at 955 South 500 West in a residential/commercial area of Bountiful, Utah. Contaminants, such as solvents, have been found on the site and have contaminated the groundwater underlying the site. Drinking water has not been affected by this contamination.
A number of different reported operations have occurred at the Site including:
- The Site was originally part of a brick manufacturing facility, encompassing
about 20 acres;
- Handling and refining of waste oil at the site began in 1957 and continued for approximately 35 years before closing in May 1993;
- In the 1950s, an asphalt business was operating on the Site;
- The Intermountain Oil Company (IOC) operation was originally a trucking business
that hauled various petroleum products to customers from the Site; and
- The oil blending business commenced in the 1970s .
The business was cited a number of times by the Davis County Health Department and the State of Utah. Neighbors of the site complained of odors and health problems, which they believed were associated with the wastes at the site. The owners took steps to resolve some of these problems. The company forfeited its permit to operate on May 3, 1993.
In 1993, the owners dismantled the refinery and consolidated some wastes into a pile, then covered some of the area with several inches of gravel.
Site Risk
The IWOR site is organized into two Operable Units (OUs). OU 1 addressed soils, subsurface soils and potential contaminant sources on site, including tanks, drums and containers. OU 2 covered groundwater.
Under OU1 a human health and screening level ecological risk assessment was
completed to determine the risk from soil contamination. The risk assessment
determined accumulation of contaminant vapors inside a building constructed
on the site would likely create unacceptable risk.
EPA performed a human health risk assessment under OU2 to evaluate potential
hazards from exposure to groundwater contamination at the site. The OU2 Baseline
Human Health Risk Assessment calculates the risk from three potential exposure
pathways:
- Ingestion of groundwater as a drinking water source;
- Inhalation of volatile organic chemicals (VOCs) that are released into the
air from indoor water uses; and
- Inhalation of VOCs that are released from groundwater and migrate upward
through the soil into indoor air.
- Other possible exposure pathways were judged to be sufficiently minor and
quantitative evaluation was not completed.
| Media Affected | Contaminants | Source of Contamination |
| Liquid waste, soil | Solvents | Petroleum processing wastes |
Cleanup Progress
The site was proposed for listing on the National Priorities List (NPL) in October of 1999 and finalized on May 11, 2000. In March, 2001, the field investigation began. A chronology of milestones follows:
- 1996 & 1998: UDEQ conducted sampling on the Site. Several solvents (bromochloromethane,
1,1-dichloroethane, and 1,1,1-trichloroethane) were identified in the sump
located east of the laboratory, and groundwater samples collected from an
on-site monitoring well contained solvents (1,2-dichlorethane, 1,2-dichloroethene,
and trichloroethene).
- 2001: In August, EPA removed and disposed of numerous containers and their
contents. The removal included: all the chemicals located in the laboratory
building; 55-gallon drums and 5-gallon containers holding various chemical
or oily mixtures; two trailer tanks and their contents; the contents of an
underground storage tank discovered during the investigation; and contents
of the sump stored above ground in the southeast portion of the Site.
In addition, debris located in various portions of the Site was removed. The debris removal included: miscellaneous piping located at various areas around the Site; scrap equipment; and empty tanks. - 2002: The Record of Decision (ROD) for Operable Unit 1 (OU1) was published. The remedy concerned finding a solution to vapors from soil contamination. It was determined these vapors might pose a health risk for anyone residing in a building constructed on the site. The ROD required any buildings constructed on the site to have a system that would prevent soil vapors from entering the building. The specifications of this requirement were formalized in a property notice filed with the Davis County Clerk and Recorder's Office.
- 2004: The Record of Decision (ROD) for OU2, which outlined the selected remedy, was signed in August. The remedy addressed the groundwater contamination through extraction treatment coupled with Dual Phase Extraction (DPE). Using DPE, both groundwater and soil vapors are extracted and treated from the same well. The remedy combines the two technologies to optimize the effectiveness of the groundwater extraction and treatment of probable contaminant source areas. The Preliminary Closeout Report (PCOR) was signed in October indicating the completion of OU2 construction.
- 2006: In February, the groundwater pump and treatment system was shut down after sampling showed TCE remains below the clean up goal or drinking water standard. A three month period of groundwater monitoring began. The results will determine if the site moves into a post clean up phase or the treatment system is restarted. A legal settlement has been reached for the site, and the settlement has been printed in the Federal Register for public comment.
- Current Status: Groundwater cleanup goals were reached in early 2006, and
the groundwater pump and treatment system was shut down. Groundwater monitoring
will continue for several years to ensure the groundwater contamination remains
below the maximum drinking water standards. Additionally, the site was sold
in 2006 along with adjacent property. The new owner is working to put the
site back into productive use.
Site Documents
Note: the following documents are VERY LARGE PDF FILES (about PDF files)2008 Five Year Review Report (PDF, 5 MB)
2008 Five Year Review Report Attachments, including site photos and interview records (PDF, 3 MB)
Update Fact Sheet, October 2006 (PDF, 2 pp, 120 kB)
Record of Decision, Operable Unit 1 (PDF, 4.3 MB)
November 2002
Record of Decision, Operable Unit 2 (PDF, 1.7 MB)
August 2004
Community Involvement
The EPA and UDEQ routinely conduct public meetings, issue fact sheets, and
interview citizens to ensure that the community is heard by the regulatory agencies.
The Administrative Record contains the documents and information that EPA used
to make its final remedy (cleanup) selections.
Site Photos
The following two links lead to images showing the site before and after removal of the tanks and scrap.
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IWOR site before removal of debris:
IWOR site after removal of debris:
Contacts
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EPA Lisa Lloyd John Dalton |
Utah Tony Howes Dave Allison |
| View Documents at:
EPA Superfund Records Center Davis County Library, South Branch |
