In addition to these neighborhoods, Riggs Park also borders the city/neighborhood Chillum, which is located in Prince George's County, Maryland.The WMATA Red Line train tracks pass through the Riggs Park neighborhood when traveling between the Takoma and Fort Totten Metro Stations.In addition to the WMATA Red Line, the CSX, MARC, and Amtrak train tracks, pass through the Riggs Park neighborhood as well.Chevron said it had complied with laws by informing the state of Maryland about the leak after its discovery and that it was pumping the gas out of the ground and removing the contaminated dirt.In 2009, the District of Columbia released environmental test results, and perchloroethylene and methyl tert-butyl ether were detected in shallow groundwater samples.