Pittsburgh Post-Gazette: A few months ago, a Marcellus Shale operator approached Leong Ying, business development manager at the radiation measurement division of Thermo Fisher Scientific, with a problem. The driller, whom Mr. Ying declined to name, was trying to dispose of oil and gas waste at area landfills but the trucks kept tripping radiation alarms. Rejected trucks had to be sent back to well pads or taken out of state, both costly options. It was happening enough that it started nudging the companys bottom line,...