THIS ORDER REQUIRES THE RESPONDENT TO CONDUCT REMOVAL ACTIVI TIES DESCRIBED HEREIN TO ABATE AN IMMINENT AND SUBSTANTIAL ENDANGERMENT TO THE PUBLIC HEALTH, WELFARE OR THE ENVIRON- MENT THAT MAY BE PRESENTED BY THE ACTUAL OR THREATENED RELEASE OF HAZARDOUS SUBSTANCES AT OR FROM THE SITE. RESPONDENT SHALL REIMBURSE U.S. EPA, UPON WRITTEN DEMAND, FOR ALL RESPONSE COSTS INCURRED BY THE UNITED STATES IN OVERSEEING RESPONDENT'S IMPLEMENTATION OF THE REQUIREMENTS OF THIS ORDER.