THE SHERIDAN DISPOSAL SERVICES SITE IS LOCATED APPROXIMATLEY NNE MILES NORTH-NORTHWEST OF THE CITY OF HEMPSTEAD IN WALLER COUNTY, TEXAS. THE SITE COVERS ABOUT 110 ACRESS OF A 696.5 -ACRE TRACT TJAT OS BPRDERED TO THE NORTH BY THE BRAZOS RIVER. THE SITE CONSISTS OF A LAGOON (12 TO 22 ACRES DEPEN- DING ON THE WATER LEVELS), A 17-ACRE DIKE SURROUNDING THE LAGON, & A 42-ACRE EVAPORATION/LAND IRRIGATION SYSTEM. AN INCINERATOR AND A GROUP OF NINE STORAGE TANKS THTA WERE USED FOR WASTE STORAGE AND TREATMENT ARE LOCATED ON THE LAGOON DIKES. SDS OPERATED THE SITE AS A STATE PERMITTED, COMMER- CIAL WASTE DISPOSAL FACILITY FROM AROUND 1958 UNTIL 1984, ACCEPTING VARIOUS ORGANIC AND INORGANIC CHEMICAL AND SOLID WASTES FOR DISPOSAL. THESE WASTES WERE TREATED BY STEAM DISTILLATION, OPEN BURNING, AND INCINERATION. IN ADDITION, THE LAGOON WAS DEVELOPED IN A LOW-LYING AREA OF THE SITE AND USED AS A HOLDING POND AND A DISPOSAL SITE FOR OVERFLOW WASTES AND WASTE TREATMENT RESIDUES.