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Diamond Shamrock Corporation

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Diamond Shamrock Corporation Landfill site (from site entrance)

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Site Summary Profile
EPA ID: GAD990741092
Location: Cedartown, Polk County, GA
Lat/Long: 34.020700, -085.271700
Congressional District: 07
NPL Status: Proposed: 01/22/87; Final: 08/30/90
Affected Media: Ground water
Cleanup Status: Construction complete - physical cleanup activities have been completed
Human Exposure Under Control: Yes
Groundwater Migration Under Control: Yes
Sitewide Ready for Anticipated Use: Yes
Site Reuse/Redevelopment: Site is currently not in use
Site Manager: Charles King (king.charlesl@epa.gov)


Current Status

The Diamond Shamrock Corp. Landfill site includes an area used to dispose of waste oil and other waste products from chemical manufacturing operations in the late 1960s or 1970s. EPA placed the site on the National Priorities List (NPL) in 1990 because of contaminated ground water resulting from the disposal area waste. EPA, the Georgia Environmental Protection Division (Georgia EPD) and the site’s potentially responsible party (PRP) have investigated site conditions and taken steps to clean up the site in order to protect people and the environment from contamination. Site contamination does not currently threaten people living and working near the site. Residents and businesses use the public water system for drinking water. By monitoring ground water and undertaking Five-Year Reviews, EPA, Georgia EPD and the site’s PRP continue to protect people and the environment from site contamination.

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Site Location and Background

The  8-acre site is located near Cedartown in Polk County, Georgia. Most of the site is a flat, fenced meadow. The site is located north of West Girard Avenue, next to and east of Cedar Creek. Henkel Corporation owns the site. Much of the area north and northwest of the site is rural. Land uses immediately surrounding the site include the Cedartown Wastewater Treatment Plant to the north and a second wastewater treatment plant to the east. The area east of the wastewater treatment plant is primarily residential; the closest residences are located approximately 700 feet from the site. Land uses south and east of the site are largely residential, with some commercial and light industrial businesses in the area. Land immediately west of the site is undeveloped and extends into agricultural and industrial areas. The nearest residence to the west is located approximately 1,000 feet from the site. Dense vegetation and Cedar Creek bound the western border of the site. The site is currently not in use.

Prior to 1968, land uses at the site included agricultural activities. In 1980, the site owner/operator at the time, Diamond Shamrock Corporation, reported to Georgia EPD that between 600 and 800 drums and approximately 1,500 gallons of material – reportedly obsolete, off-specification products and raw materials from chemical plant manufacturing operations – were buried in unlined trenches at the site.

Henkel Corporation acquired the site property in 1987. In 1990, EPA listed the site on the NPL.

View site location map.

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Threats and Contaminants

Site investigations identified contamination in soil and ground water that could potentially harm people in the area. Soil and ground water contamination resulted from waste disposal practices at the site. Contaminants of concern identified include 1,2-dichloroethane, manganese, toluene and trichloroethylene. Manganese is the only contaminant that still exceeds its ground water cleanup standard.

Site investigations indicated that actual or threatened releases of hazardous substances from the site could present an imminent and substantial endangerment to people and the environment if not cleaned up. The PRP has completed all cleanup actions except for the cleanup of contaminated ground water, which is ongoing.

In 1990, the PRP treated contaminated soil and removed and incinerated liquid waste. The PRP determined that remaining site soils met cleanup standards for unrestricted use.

Cleanup of ground water contamination is mostly complete, except for manganese. Residents and businesses connect to the public water system or use wells not affected by remaining ground water contamination. Institutional controls are in place to restrict ground water use. Ground water monitoring is ongoing. The site is fenced and locked.

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Investigation and Cleanup Responsibility / Oversight

The PRP leads site investigation and cleanup activities, with oversight provided by EPA and Georgia EPD.

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Site Cleanup Plan

In 1994, EPA issued a cleanup plan (a Record of Decision, or ROD) for the site, following a short-term cleanup action in 1990. The plan included the following activities:

In 1997, EPA issued an Explanation of Significant Differences (ESD) that changed the manganese cleanup goal from 200 micrograms per liter to 850 micrograms per liter. This change did not fundamentally change the cleanup approach, and the cleanup approach remained fully protective of people and the environment.

Summaries of site cleanup approaches are also available online in key site cleanup documents, including the ROD and Five-Year Reviews.

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Cleanup Progress

In 1990, the PRP treated approximately 1,500 cubic yards of waste-impacted soil using bioremediation, which is the use of living organisms to break down contaminants. The PRP also incinerated approximately 8,400 gallons of liquid waste at a licensed hazardous waste disposal facility. The PRP determined that remaining site soils met cleanup standards that allow for unrestricted use.

Implementation of the site cleanup plan identified in the 1994 ROD began in 1995. Cleanup of ground water through monitored natural attenuation is ongoing.

The site’s third Five-Year Review, completed in 2010, found that the cleanup met surface water goals and that surface water sampling was no longer required. The Five-Year Review also found that the site’s cleanup approach continues to protect people and the environment from remaining site contamination.

Summaries of cleanup activities are also available in Five-Year Reviews online.

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Enforcement Activities

EPA negotiated legal agreements with the site PRP to investigate and clean up the site. The PRP continues to fund site cleanup, monitoring and oversight activities.

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Community Involvement

EPA has worked with the community and its state partner to develop a long-term cleanup plan for the site, reflecting the Agency’s commitment to safe, healthy communities and environmental protection. Community engagement and public outreach are core components of EPA program activities.

EPA has conducted a range of community involvement activities to solicit community input and to make sure the public remains informed about site activities throughout the cleanup process. Outreach efforts have included public notices, interviews and information meetings.

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Future Work

Monitored natural attenuation of contamination in ground water is ongoing.

EPA completed the last Five-Year Review in 2010 and plans to complete the next Five-Year Review in 2015.

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Additional Information

EPA keeps additional site documents and information in a site information repository at the location below. EPA also posts site documents, when available, on EPA’s CERCLIS Site Profile page. For documents not available on the website, please contact the Region 4 Freedom of Information Office.

Site Repository

Cedartown Public Library
245 East Ave.
Cedartown, GA 30125

For documents not available on the website, please contact the Region 4 Freedom of Information Office.

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