PPG IS THE OWNER AND OPERATOR OF A FACILITY AT 4829 FAIRLAND ROAD IN NORTON, OHIO. THE FACILITY COVERS ABOUT 3300 ACRES OF LAND EXTENDING FROM THE ERIE LACKAWANNA RAILWAY AND LAKE DOROTHY TO THE NORTH IN THE TOWN OF BARBERTON, ENCOMPASSING HUDSON RUN AND WOLF CREEK SOUTHWARD TO THE TUSCARAWAS RIVER AND SOUTHWARD ALONG THE RIVER AND PENN CENTRAL RAILWAY TO A LINE APPROXIMATELY 2200 FEET SOUTH OF CENTER ROAD. THE FACILITY LIES ALL WITHIN SUMMIT COUNTY OHIO. THE PURPOSE OF THE ORDER IS TO PROVIDE FOR INTERIM MEASURES AT THE FACILITY TO PROTECT PUBLIC HEALTH AND THE ENVIRONMENT, TO PERFORM A RCRA FACILITY INVESTIGATION (RFI) TO FULLY DETERMINE THE NATURE AND EXTENT OF ANY RELEASES OF HAZARDOUS WASTE, AND TO PERFORM A CORRECTIVE MEASURES STUDY (CMS). THE RESPONDENT PPG, ENGAGED IN THE STORAGE AND TREATMENT OF HAZARDOUS WASTE IN TANKS AND CONTAINERS AT THE FACILITY THAT ARE SUBJECT TO INTERIM STATUS REQUIREMENTS. TREATMENT OCCURRED IN TANKS AND THERMALLY IN INDUSTRIAL BOILERS. THROUGH MARCH 1987, 11 SWMUS HAD BEEN IDENTIFIED AT THE FACILITY, BUT BY 1989, EPA HAD IDENTIFIED 109 SWMU'S AND 3 AREAS OF CONCERN. IN JUNE 1990, RESPONDENT IDENTIFIED AN ADDITIONAL SWMU. AS EARLY AS 1983, RESPONDENT'S CONSULTANTS HAD IDENTIFIED RELEASE TO THE GROUNDWATER (D'APPOLONIA WASTE MANAGEMENT SERVICES, SEPT. 83). THESE RELEASES