Keystone Sanitation Landfill NPL Site

State TrusteeAO Bureau

Also Known As


Incident Type




Case Status



Conwego Creek and Piney Creek


Contaminants of Concern Include

Affected DOI Resources Include

Migratory Birds

Financial Summary

Restoration Funds Collected:


*Restoration Funds Allocated:


*Restoration Funds Remaining:


* Restoration Funds can contain multiple settlements/projects. All collections are placed in interest bearing accounts. For detailed information on individual settlements/ projects please visit: NRDAR Status Report

Case Description

The Keystone Sanitation Landfill is located in Adams County, Pennsylvania. It occupies an area of approximately 40 acres in a gently rolling, predominantly agricultural setting. The landfill was used from 1966 until 1990 for disposal of household and municipal waste and certain types of industrial and construction debris.

The landfill is situated on a ridge, and surface-water runoff flows from the site in all directions. Conewago Creek, a tributary to the Susquehanna River, drains the northern and eastern portions of the site. Piney Creek, a tributary to the Monocacy and Potomac Rivers, drains the southern and western portions of the site.

Chemical analysis of environmental media on and near the site began in 1974 following installation of monitoring wells around the perimeter of the property. A Remedial Investigation (RI) was conducted by the Environmental Protection Agency (EPA) during 1989 and 1990. Results of well monitoring and the RI work revealed that the groundwater under and near the site, the surface soil on and near the site, and the surface water and sediment in some of the small streams near the site were contaminated with volatile organic compounds, and heavy metals including mercury, zinc, and manganese.

Case Documents

 Document TypeDocument NameDocument Date


 Consent Decree Consent Decree-3rd and 4th party defendants 09/10/1999
 Consent Decree Consent Decree-Keystone Sanitation  
 Consent Decree Consent Decree-original generator defendants 09/10/1999


 Restoration Plan Keystone Sanitation Restoration Plan Addendum- DRAFT 07/24/2015
 Restoration Plan Restoration Plan 10/01/2007

Map View

Case Contact

Pennsylvania Ecological Services Field Office

State College, PA | (814) 234-4090 |

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