EPA Superfund Site

TONOLLI CORP.

PA | EPA ID PAD073613663

About this site’s exposure pathways: As of April 2025, the Tonolli Superfund Site is considered “Insufficient Data to make a Human Exposure evaluation” (HEID) because of a newly identified potential lead exposure pathway in residential soils off-site. The site was previously categorized as Current Human Exposure Controlled and Protective Remedy in Place but was reevaluated based on the Updated Residential Soil Lead Guidance for CERCLA Sites and RCRA Corrective Action Facilities released on January 17, 2024. Overall the Site’s remedy remains protective of human health and the environment because exposure pathways that could result in unacceptable risk are being controlled, except for soil at potentially one off-site residential property that has not been sampled and could potentially be an exposure pathway. The landfill cover system prevents direct exposure to contaminated soil and waste, and a long-term operation, maintenance and monitoring program is in place to ensure the long-term integrity of the landfill cover system. Residential areas where soil cleanups have been completed are verified as protective of human health. Groundwater in the bedrock aquifer has not been affected by the Site. Institutional controls are in place to limit land use, to prevent damage to the landfill and to restrict groundwater use. Contaminated groundwater in the overburden aquifer continues to be monitored to determine if performance standards will be achieved.
EPA uses this Human Exposure status when there is a lack of evidence to suggest that actual or reasonably anticipated human exposures are occurring and that those exposures are above acceptable risk-based levels. The planned activities to collect sufficient information to evaluate this new exposure pathway is to collect soil samples for the one off-site residential property that was not previously sampled for lead. EPA currently anticipates that there will be sufficient data to make a Human Exposure evaluation by April 2026.