Workers reentered the Waste Isolation Pilot Plant yesterday for the first time since the Feb. 14 radiation release after a delay earlier this week due to a lack of real time radiation monitors. In separate shifts, two eight person teams entered the mine and established an underground base of operations that will aid in efforts to identify the source of the contamination. “While in the underground facility, the teams surveyed conditions from the Salt Shaft Station to the Air Intake Shaft Station to establish two useable exit locations—a requirement for future underground work,” states a Department of Energy release. “They also established communications with the Central Monitoring Room above ground using a mine pager and landline phone, installed an additional continuous air monitor near the Salt Shaft Station to provide additional monitoring capabilities and established an underground base of operations for future entries into the mine.” The teams did not detect airborne contamination.