THIS IS A RESPONE ACTION AGAINST THE RESPONSENT UNDER SECTION 106 OF CERCLA TO COMMENCE AND COMPLETE THE SITE INVESTIGATION, SAMPLING ACTIVITIES, AND REMOVAL OF HAZARDOUS SUBSTANCES, POLLUTANTS OR CONTAMINATS AT RES- PONDENT'S BIG PINEY NATURAL GAS COMPRESSOR STATION. EPA HAS DETERMINED THAT RESPONDENT'S GIG PINEY FACILITY MAY PRESENT AN IMMINENT AND SUBSTANTIAL ENDANGERMENT TO THE PUBLIC HEALTH OR WELFARE OR THE ENVIRONMENT BECAUSE AN ACTUAL OR THREATENED RELEASE OF HAZARDOUS SUBSTANCES, POLLUTANTS OR CONTAMINANTS.