THE SITE IS LOCATED IN AN AGRICULTURAL AND COAL MINING REGION OF EAST-CENTRAL OHIO, APPROX. 75 MILES EAST OF COLUMBUS. THE COUNTY'S LARGEST CITY, CAMBRIDGE, LIES ABOUT 3 MILES NORTHWEST OF THE SITE. THE LANDFILL IS SITUATED ON THE NORTH SLOPE OF A RIDGE THAT OVERLIES ABANDONED COAL MINES IN THE UPPER FREEPORT COAL SEAM. THE NORTH HALF OF THE LANDFILL LIES IN AN UNRECLAIMED STRIP MINE IN THE COAL SEAM, WHERE SURFACE MINE SPOIL AND NATURAL SPOILS FORM THE SHALLOW AQUIFER . THE SOUTH HALF OF THE LANDFILL LIES 20 TO 80 FEET ABOVE AN ABANDONED, FLOODED DEEP MINE IN THE SAME COAL SEAM. THE FLOODED DEEP MINE FORMS AN AQUIFER REFERRED TO AS THE DEEP MINE AQUIFER .