Chillum PERC

Washington, DC - Region III

Site Contact:

Greg Ham
On-Scene Coordinator

5901 Eastern Avenue
Washington, DC 20011

Latitude: 38.9617400
Longitude: -76.9972400

EPA has been asked to investigate the presence of perchloroethylene in groundwater and soil in the vicinity of Chillum, MD and Washington, DC. Perchloroethylene, also known as PERC, tetrachloroethylene, tetrachloroethene, and PCE, was discovered during an underground storage tank leak spill cleanup involving gasoline at a property adjacent to the PERC site. The site under investigation includes several dry cleaning facilities and a residential community in the Lammont-Riggs Park section of Washington, DC. The dry cleaning facilities are located in Maryland and are immediately adjacent to the Washington, DC border. Groundwater flows approximately south from Maryland into Washington, DC.

This website will serve as a conduit for information to the public on the ongoing EPA investigation of PERC in sub-surface soil in Chillum, MD and Lamont Riggs Park area of Washington, DC. For the latest on the EPA oversight of the investigation and cleanup of the gasoline spill from the former Chevron gasoline station at the site, please go to

Please go to documents for the latest in information and announcements of upcomming events. Please refer to the documents link for details on this meeting. Fact sheets on soil vapor intrusion have been added to the site to further explain the pathway investigated at this site.

A fact sheet from the Agency for Toxic Substances and Disease Registry dated December 2003 has been added to the site. You may access this fact sheet thru the documents link.

A flyer announcing where the ATSDR Health Consult can be found has also been added to the site.

The latest Polution Report dated May 18, 2004 was added to the website June 16, 2004. It contains a summary of the onsite activities and future events.

A factsheet has been included on this website as well as the Chillum Gas website to update the residents of findings at the Riggs Plaza Shopping Center.

The analytical results for indoor air and soil vapor sampling conducted during the month of Aril 2004 has been added to the documents section of this website. Perc Groundwater maps showing results from samples collected from wells during the period of May 2004 thruogh August 2004 have also been included to the documents section of this website.

Last updated March 31, 2005.

For additional information, visit the Pollution Report (POLREPS) and the Notices sections.