Health Assessment for Tyson's Dump, Upper Merion Township, Montgomery County, Pennsylvania, Region 3. CERCLIS No. PAD980692024

摘要

Tyson's Dump National Priorities List (NPL) site is an abandoned septic and chemical waste disposal site located within an old sandstone quarry. Several unlined lagoons were formerly used to store various industrial, municipal, and chemical wastes. Previous waste disposal operations have resulted in contamination of soil, groundwater, sediment, and surface water with numerous organic compounds. The site is located near the Schuylkill River which is used as the water source for 3 downstream public water systems. Trace amounts (less than one part per billion (ppb)) of 1,2,3-trichloropropane (TCP) have been detected at the raw water intakes of these plants. However, these low concentrations of TCP would not be expected to pose a significant health concern. High concentrations of contaminants remain in on-site surface and subsurface soils and pose a potential health concern. The site is of potential public health concern because of the risk to human health resulting from possible exposure to hazardous substances at concentrations that may result in adverse health effects. As noted in Human Exposure Pathways Section below, human exposure to the contaminants may occur via ingestion, inhalation, and dermal contact with surface water, groundwater, soil, and sediment. No follow-up health study is indicated at the time.