Copley Square Photos

An EPA contractor tests a soil "core" dug from the Copley Square Plaza parking lot.

A close-up look at a soil "core" being tested for volatile organic compounds, including tetrachloroethene which is one of the main contaminants of concern.

An EPA contractor removes a soil "core" from a drill rig at Copley Square Plaza.

Using a GPS unit to map the place where a soil gas vapor probe will be installed.

An EPA contractor drills into the Copley Square Plaza parking lot using a device called a membrane interface probe.

An EPA contractor reads test results taken with a device called a membrane interface probe.

An EPA contractor uses a device called a membrane interface probe in the field between the Copley Square Plaza parking lot and the Meadows of Copley townhome complex.

An EPA contractor checks for volatile organic compounds in the field between the Copley Square Plaza parking lot and the Meadows of Copley townhomes.

A worker feeds cable to a device called a membrane interface probe to test for volatile organic compounds inside the former pit room of the Danton dry cleaning business in Copley Square Plaza.