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Directory Results for Semiannual Report to Congress, April 1, 1998 - September 30, 1998. EPA--350-R-98-004, November 1998. This is the Semiannual Report to Congress prepared by the EPA, Office of Inspector General for the 6-month period ending September 30, 1998. to Semiannual Report to Congress, April 1, 2014 - September 30, 2014. EPA-350-R-14-002, November 2014. This is the EPA Office of Inspector General's Semiannual Report to Congress for the 6-month period ending September 30, 2014 - epa