A Boart Longyear sonic drilling rig and support vehicles at a wellsite on the grounds of Ballymeade Country Club, Falmouth, MA.

Boart Longyear truck-mounted sonic drilling rig and support vehicles at a wellsite on the Massachusetts Military Reservation. 

Photograph shows the drill head positioning a new section of drill casing.

Photograph shows the sonic drill rig with the new section of drill casing in position for drilling.

Photograph shows the sonic drill rig with the drill casing partially penetrated.

Photograph shows the sonic drill rig with the drill casing almost completely penetrated. 

Jacobs Engineering geologist (Don Melcher) examining a retrieved well sample.

Photograph shows the tent used by the wellsite geologist and the core samples which have been extracted into plastic sleeves.

Core samples in plastic sleeves.

More core samples in plastic sleeves.

Photograph shows USGS and CH2M Hill geologists holding representative examples of bedrock cores.