Current Site Information
EPA Region 3 (Mid-Atlantic)Pennsylvania
EPA ID# PAD980712798
4th Congressional District
Last Update: February 2014
Pennwalt Lindane Dump
Alsco Community Park
Current Site Status
The site is currently in a long-term operation and maintenance phase that is being conducted by the potentially responsible parties. EPA completed the 4th Five Year Review of the Site in September 2013. The purpose of the Five-Year Review is to determine if the remedy at the site is protective of human health and the environment. EPA found the remedy at the site to be protective of human health and the environment. There were no issues or recommendations identified in the report. EPA continues to review site operating reports and will conduct periodic visits to the site.
The Lindane Dump site, located in Allegheny County, Pennsylvania, consists of a recreational park about 14-acres in size and a 47 ½-acre lower project zone that includes a closed landfill area. About 400 tons of powdered lindane pesticide waste and other industrial waste were dumped at the site from 1900 to 1950. Industrial waste dumping continued after the sale of the property in 1965. In 1976, a portion of the site was donated by the owner to Harrison Township for use as a park area. There are approximately 13,000 people living within one-mile of the site. Residents near the site obtain water from a municipal system that draws water from the Allegheny River.
The remedy at the site included installation of a multilayer clay and soil cap on approximately 18 acres of the Site. The cap is intended to prevent potential exposure to contaminants present in surface and near-surface soils and to reduce or eliminate infiltration of water into the fill area. Additionally, the remedy includes an upgraded leachate and shallow groundwater collection and treatment system, institutional controls, and long term maintenance. The remedy continues to operate as it should, and the collected leachate and shallow groundwater is being treated to levels below the discharge criteria established by the Commonwealth of Pennsylvania.
Site ResponsibilityThis site is being addressed through federal, state and potentially responsible parties' (PRPs) actions.
NPL Listing HistoryOur 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 September 30, 1982 and formally added to the list on September 8, 1983.
Threats and Contaminants
The ground water and soil are contaminated with pesticides. The site has been capped and an upgraded leachate and shallow groundwater collection and treatment system has been installed. These actions have significantly reduced the possibility that pesticide residues in the soil might leach into the groundwater and surrounding soils. The cap and leachate and shallow groundwater collection and treatment system also prevents humans and wildlife from accidentally ingesting or coming into direct contact with contaminated groundwater, soil, or leachate which may pose health risks.
Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.