Today the Federal Communications Commission's Enforcement Bureau issued a pair of closely-related enforcement actions against two radio station licensees for failing to comply with the FCC's radiofrequency exposure limits. T-Mobile received a $60,000 Notice of Apparent Liability and Wirelessco received a $25,000 Notice of Apparent Liability for apparent inadequate protections to prevent public access to antennas co-located on the same office building rooftop in Phoenix, Arizona.