The head of an Energy Department panel working to improve the safety of hydrofracking says the Environmental Protection Agency’s ongoing study of the practice, slated to be completed in 2014, is too slow to be of much use. The seven-member Energy Department panel, led by former CIA Director John Deutch, has a 90-day deadline to identify immediate steps to improve the safety of hydraulic fracturing, known as fracking, a technology that injects chemicals and water into rock formations to free trapped natural gas. “I am concerned about the time schedule” for the EPA’s final report, Deutch said today during a meeting of his natural- gas subcommittee in Washington