> Gilbert Amelio, <br />a scientist who was <br />> chief executive of <br />> Apple Inc.and National Semiconductor and a board member of <br />> AT&T Inc. <br />He <br />> believes industry leaders will "take whatever steps may be <br />> necessary to prevent harm to workers or others who may have good <br />> reason to be close to these sites." <br />> Jimmy Crespo <br />> complained to federal <br />> labor regulators in 2011 that he became disabled with cognitive <br />> issues after working more than 300 times on heating and cooling <br />> systems for antennas for <br />> Johnson Controls Inc., a <br />> Sprint Corp. <br />> contractor. "I had no training, no monitoring devices and no <br />> warning from my employer," Mr. Crespo said. Regulators <br />> asked Johnson to ensure the rules were being followed. Johnson <br />> said it no longer had the contract, and Sprint said the systems <br />> were a safe distance from antennas. "Employees were not working <br />> in an area where radio frequencies would pose a hazard," a <br />> Johnson spokesman said. Sprint said annual checks show all sites <br />> are compliant. AT&T <br />> said it places "the utmost importance on the safety of workers <br />> and the public from RF emissions and we have a rigorous safety <br />> program in place to minimize exposure to RF emissions." The FCC <br />> in April signed a consent decree with <br />> Verizon Communications Inc. <br />> to settle RF violations in Pennsylvania and <br />> Connecticut, involving an unlocked rooftop and a missing sign. <br />> Verizon agreed to pay $50,000 and to train employees and <br />> contractors, and check other sites. The carrier has told <br />> regulators that property owners complicate compliance. "In <br />> New York City, condominium tenants became upset and concerned <br />> with RF notification signs we placed on a terrace access point," <br />> Tamara Preiss, <br />> Verizon's vice <br />> president of federal regulatory affairs, wrote to the FCC in <br />> February. Ms. Preiss said the signs were removed after the <br />> tenants hired a lawyer. Insurers are becoming concerned. "The <br />> risk is often transferred to 'unsuspecting' property owners," <br />> Roger Egan, <br />> executive chairman of <br />