Congressional District # 4
TIPPECANOE SANITARY LANDFILL, INC.EPA ID# IND980997639
Last Updated: November, 2014
The Tippecanoe Sanitary Landfill (TSL) is approximately 80 acres in size and is located in Lafayette, Tippecanoe County, Indiana. The site is an inactive landfill that includes a wetland. The site lies within the common floodplain of the Wabash River, which is located within 1.5 miles northwest of the site and flows to the south, and Wildcat Creek, which flows toward the north approximately 600 feet northeast of the landfill.
The land use in the immediate area surrounding the site is a mixture of residential, commercial, industrial, and agricultural, located north/northeast of downtown Lafayette. The site is bordered on the west by North 9th Street, CSX Railroad, and businesses, on the north and east by wooded and agricultural land with scattered residences, and on the south by a former quarry including woods, a wetland, and lake. Municipal water was extended to the area prior to the discovery of any groundwater contamination. No drinking water wells exist within a one-mile radius of the site.
In 1971, Tippecanoe County, Purdue University, the City of West Lafayette, and the City of Lafayette decided that there should be one landfill in the county that local residents, commercial entities, and industry could use for the disposal of non-hazardous wastes. TSL was privately formed and reached an agreement with the Tippecanoe County Board of Commissioners in June 1971 for the operation of a landfill. TSL first leased the property at the site for the landfill in June 1971. The Indiana State Board of Health (ISBH) issued an operating permit on April 12, 1971, and landfill operations began in June 1971. Renewal of the landfill operating permit was denied on February 1, 1978. Sporadic daily cover, unsatisfactory cover materials, possible acceptance of hazardous wastes by the landfill, and poor geological conditions were cited as reasons for denial of the permit. An agreed order allowed the landfill to operate until August 1, 1979. In October 1979, TSL submitted a renewal application; on February 27, 1981, TSL was granted a two-year renewal of its operating permit. In 1983, renewal of TSL’s operating permit was again denied because the landfill was not operating in accordance with permit stipulations. On November 29, 1988, a Consent Decree was filed that stipulated that solid waste could not be accepted at the site after October 1, 1989. The CD also outlined landfill closure requirements.
Primarily, the wastes received for disposal at the site were solid wastes generated by residents, businesses, and industries. An industrial sludge was accepted at the site for a number of years in the 1970s, but this practice was discontinued when a sludge sample was found to contain elevated levels of polychlorinated biphenyls (PCBs). During the last year or more of operation, some out-of-state wastes were deposited at the site. Estimates indicate that 3.4 million cubic yards of solid waste were disposed in the landfill over approximately 59 acres.
The U.S. Environmental Protection Agency (EPA) placed the site on the National Priorities List (NPL) on August 30, 1990.
Site ResponsibilityThis site is being addressed through state and potentially responsible parties' actions.
Threats and Contaminants
Groundwater contamination, including organic and inorganic compounds typically seen in landfill leachate, has been verified at the site. However, no drinking water wells exist within one mile of the site and municipal water was extended to the area prior to the discovery of any groundwater contamination. Prior to cleanup activities performed at the site, methane gas migrated from the waste disposal area.
Remedial action objectives were developed for four environmental media of possible concern: landfill contents, leachate, landfill gas, and groundwater. Groundwater contamination, including organic and inorganic compounds typically seen in landfill leachate, was verified at the site.
EPA, the Indiana Department of Environmental Management (IDEM), and ten of the parties who had been named Potentially Responsible Parties (PRPs) for the site agreed to an Administrative Order on Consent (AOC) that required the PRPs to fully determine the nature and extent of the contamination at the site by conducting a Remedial Investigation (RI) and to evaluate alternatives for cleanup alternatives to address potential risks at the site by completing a Feasibility Study (FS). RI/FS work began in March 1990 and continued through 1997.
EPA, in consultation with IDEM, signed a Record of Decision on September 30, 1997, which selected the final cleanup remedy for the site. The major components of the selected remedy include:
- Placement of a sanitary landfill cover for the waste disposal area;
- Installation of a fence that surrounds the site;
- Construction of a leachate extraction and treatment system;
- Construction of a landfill gas extraction system;
- A contingent groundwater remediation component if either source control and natural attenuation are determined to not be reducing the downgradient groundwater contamination to acceptable levels;
- On-site groundwater treatment, if deemed necessary;
- Implementation of deed restrictions, including provisions for the protection of the remedial actions taken and the prohibition of wells on the site to be used for a water supply; and
- Operation and maintenance of all remedy components.
The PRPs signed a Consent Decree with IDEM on March 31, 1998, which required implementation of the Remedial Design/Remedial Action. The Consent Decree was entered in the U.S. District Court in Indianapolis on August 10, 1998. EPA signed an Explanation of Significant Differences (ESD) on September 27, 2001, which allows for on-site storage of extracted leachate with off-site treatment and disposal at a licensed facility.
Implementation of the remedy began in 2000 and was completed in 2002. EPA signed the Preliminary Close Out Report for the site on September 27, 2002. Operation and monitoring of all remedy components, including groundwater monitoring, continues at the site to ensure that the remedy remains protective.
EPA signed the First Five-Year Review Report for the site on September 30, 2005, which was prepared for EPA by IDEM. The review made the following findings: the implemented remedy is effective and protective of human health and the environment; the impact of leachate on groundwater has been greatly decreased and the site is in substantial compliance with landfill gas/methane applicable requirements; any potential threats to human health and the environment have been addressed by the implemented actions; and the institutional controls that have been put in place have been evaluated and have been determined to be effective and enforceable.
EPA signed the Second Five-Year Review Report for the site on September 21, 2010, which was prepared for EPA by IDEM. The assessment of the 2010 five-year review found that the remedy is protective of human health and the environment in the short term and is expected to be protective in the long term. The remedy is effective and the impact of leachate on groundwater has continued to decrease. The site is in substantial compliance with landfill gas/methane requirements due to continuous monitoring and adjustments to the methane extraction system. Off-site methane alarm systems are maintained and functioning properly. Any potential threats have been addressed. Institutional controls required by the ROD remain in place and are effective.
The 2010 five-year review noted that quarterly groundwater monitoring results, collected since before the start-up of the remedy, show decreasing concentration trends in a number of leachate indicators including chloride, total dissolved solids, anions, and alkali and alkaline earth metals. The decreasing trends are predominantly observed in point-of-compliance monitoring wells and off-site monitoring wells, indicating the positive effects of the remedy. Similarly, decreases in the number of exceedances of Maximum Contaminant Levels (MCLs) and Secondary MCLs have also been observed. Off-site groundwater has not exceeded health-based standards since routine groundwater monitoring was instituted.
A copy of the five-year review reports and other site documents are available for review in the site's Information Repository, located at the Tippecanoe County Public Library, 627 South Street, Lafayette, Indiana.
The next five-year review for the site will be completed in 2015.
During the summer of 2014, EPA, IDEM, and technical representatives for the PRPs met to discuss potential site re-use and redevelopment issues. With input from EPA and IDEM's risk assessors, the PRPs are in the process of developing a revised conceptual site model for a post-construction site risk assessment. It is anticipated that the draft revised conceptual site model will be submitted to EPA and IDEM in late 2014/early 2015.
ContactsRemedial Project Manager, U.S. EPA
linda kern (firstname.lastname@example.org)
Community Involvement Coordinator, U.S. EPA
AliasesTIPPECANOE SANITARY LANDFILL, INC
TIPPECANOE SAN LDFL