Q1 2012 Koppers Holdings Inc. Earnings Conference Call May 4, 2012 at 11:00 AM EDT Click here for webcast Live Teleconference Information Primary # - 877-941 0844 Secondary # - 480-629 9835 Passcode - 4526718 Replay Teleconference Information Start Date - May 4, 2012 at 1:00 PM EDT Primary # - 800-406 7325 Secondary # - 303-590 3030 Passcode - 4526718