The Occidental Chemical Corp./Firestone Tire & Rubber Co. site is located in Lower Pottsgrove Township in Montgomery County, Pennsylvania. From 1942 to 1985, four consecutive owners disposed of industrial wastes at the 250-acre area. Wastes included cutting oils, metal filings, tires and PVC sludge resins. Waste disposal practices contaminated soil, sediment and groundwater with hazardous chemicals. Following cleanup, operation and maintenance activities are ongoing.