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EPA Region 3 (Mid-Atlantic)
EPA ID# PAD981038052
9th Congressional District
Last Update: January 2015
Current Site Status
The responsible parties implemented the the cleanup plan at the Delta Quarries & Disposal/Stotler Landfill site, however, maintenance and groundwater extraction, treatment and monitoring continues. In 2013, the responsible parties shut down several wells that indicated cleanup levels were reached at certain locations for the site contaminants of concern. The responsible parties conducted additional sampling to verify that these levels have not increased and submitted this data to the EPA for review in an Optimization Report. The EPA is currently reviewing the report and is conducting an evaluation of the extraction system. Three Five-Year Reviews, conducted to date, site confirmed the remedy is protective of human health and the environment.
Site DescriptionThe 57-acre Delta Quarries & Disposal, Inc./Stotler Landfill site, located in Blair County, Pennsylvania, is an inactive, municipal landfill that operated from 1964 until 1985. Originally, the site consisted of two separate landfills that were combined with the Delta-Altoona Sanitary Landfill to form one large facility. Approximately 2,500 people live within 3 miles of the site. The closest residence is 35 feet from the site, and there are private wells in the vicinity. The aquifer under the site is used as a source of drinking water by local municipalities. About 1,500 people obtain drinking water from wells within 3 miles of the site. Ground water flows in the direction of the Little Juniata River, which is one-mile from the site and is used for recreational activities.
- Site Responsibility
- This site is being addressed through federal, state, and potentially responsible parties' (PRPs) actions.
- NPL Listing History
- Our country's most serious, uncontrolled, or abandoned hazardous waste sites can be cleaned using federal money. To be eligible for federal cleanup money, a site must be put on the National Priorities List. This site was proposed to the list on June 10, 1986 and formally added to the list March 31, 1989.
Threats and ContaminantsThe ground water and surface water are contaminated with various volatile organic compounds (VOCs) and heavy metals that leached from the landfill areas. Threats to human health may include ingestion, direct contact, and absorption of contaminated surface water and ground water. The landfill is covered with 4 feet of soil, and the soil cover has been revegetated.
Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.
In 1984, the potentially responsible parties (PRPs) and the State entered into a Consent Order and Agreement to close the site. In 1987, these parties covered the landfill with soil to limit the further spread of contaminants. The same year, EPA and the PRPs executed an additional Consent Order requiring a study to define the nature and extent of contamination and to identify remedial alternatives for cleanup. The study, known as a remedial investigation, was completed in 1991. Based on the results of the remedial investigation, EPA issued a Record of Decision (ROD) in March, 1991. The remedy selected consisted of pumping and treating ground water to address contamination, establishing deed and access restrictions, performing cap maintenance, installing a gas venting system, and conducting long-term monitoring. The design was conducted by the responsible parties under a May, 1992, Consent Decree. The entire site was fenced in 1992. At the end of the remedial design process, in 1995, the PRPs proposed to modify the selected remedy, as follows: Instead of pumping and treating ground water at the site, the responsible parties proposed to extract ground water at the site and pump it to the nearby waste water treatment plant for treatment. EPA agreed to this proposal and issued an Explanation of Significant Differences (ESD) in December 1995. The ESD allowed the responsible parties to implement a more reliable and less expensive treatment alternative. Construction of the extraction system started, in June 1996, and by December the system was operational. This achievement marked the completion of construction. In October 1998, after the extraction system was fine-tuned to ensure the extraction wells were preventing contaminated ground water from leaving the site, EPA acknowledged that the PRPs had completed the remedial action phase of the cleanup and entered into the operation and maintenance phase . The PRPs continue to work at the Site. During the fall of 1999, they upgraded electrical instrumentation and installed additional chain link fencing. In March 2001, EPA and the State changed sampling requirements. EPA continues to inspect the site on an annual basis and to discuss site conditions with the Responsible Parties and the State. The next Five-Year Review will be conducted in 2016.