"Furloughs are going to cause disruption," department spokeswoman Courtney Rowe said Wednesday. "We're looking to do it in ways that cause the minimum impact."At the EPA, officials are planning up to 13 furlough days, with the first four coming between April and June 1, said John O'Grady, president of AFGE local 704. There also would be mandatory furlough days on May 24, July 5 and Aug. 30 â¿¿ coming around the Memorial Day, July Fourth and Labor Day holidays â¿¿ that would shut the agency entirely, he said. Some of the longest furloughs are expected at the Defense Department, where about 800,000 civilian employees face up to 22 unpaid days off over the next several months. The agency has not yet specified when those will happen, but some agencies may try to put off furloughs for several months in hopes that Congress will come up with a budget fix. More flexibility could be coming soon. A House measure passed Wednesday that prevents a shutdown of federal agencies on March 27 also would grant the Pentagon greater latitude in implementing its share of short-term spending cuts. Senate Democrats could try to expand that flexibility to other agencies, potentially reducing the number of workers who are furloughed. Sen. Roy Blunt, R-Mo., said he plans to introduce legislation that would allow the Obama administration to exempt from furloughs essential federal employees, such as those who perform food inspections and other urgent functions, so the consequences of the budget cuts would not harm the economy or public safety. Border Patrol agents at the Homeland Security Department, for example, face up to 14 days of furloughs and a moratorium on regular overtime pay, which could mean a 35 percent decline in wages for the rest of the fiscal year. Union officials warn that could mean trouble for border security, as agents aren't used to stopping work just because their shifts end, especially if they are chasing drug or gun smugglers.