THIS UNILATERAL ADMINISTRATIVE ORDER REQUIRES THAT THE RESPONDENTS REMOVE HAZARDOUS SUBSTANCES FROM THE SITE. THE REMOVAL ACTIONS INVOLVE THE REMOVAL, CAPPING, STABILIZATION YARD REMOVAL, REVEGETATION, SEDIMENTATION CONTROL, ROUTING, AND OTHER APPROPRIATE METHODS OF RAILLINES AND RAILBEDS AND ADJACENT OR DOWNHILL RECEPTOR AREAS SUCH AS YARDS IN AND AROUND BUTTE, MT WHICH ARE ABOVE ACTION LEVELS OR EXHIBIT STORMWARER RUNOFF OR SEDIMENTATION RUNOFF OF A SUFFICIENT NATURE TO REQUIRE ACTION.