This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Release the Plagueland Termites in the Northridge Lumber Mill, then return with the Barrel of Plagueland Termites to Nathaniel Dumah at Chillwind Camp in Western Plaguelands.
Have you done it, <name>? Have you released the termites? The Light help us if the Scarlet Crusade were able to hold onto both the mill and Hearthglen. They should have neither. They're just capitalizing on the victims of the last war and should be put down like rabid animals!