The 57-acre Delta Quarries & Disposal, Inc. /Stotler Landfill site is located in Blair County, Pennsylvania. A municipal landfill operated at the site from 1964 to 1985. Originally, the area consisted of two separate landfills that were combined with the Delta-Altoona Sanitary Landfill to form one large facility.

Waste and leachate from the landfill contaminated soil, surface water and groundwater with hazardous chemicals. Following cleanup, operation and maintenance activities are ongoing.