03/29/91: SYNOPSIS OF CASES: THE SHERIDAN DISPOSAL SERV. SITE IS LOCATED APPROXIMATELY NINE MILES NRTH-NORTHWEST OF THE CITY OF HEMPSTEAD IN WALLER COUNTY TX. THE SITE COVERS ABOUT 110 ACRES OF 696.5-ACRE TRACT THAT IS BORDERED TO THE NORTH BY THE BRAZOS RIVER. CONTAMINANTS HAVE BEEN DETECTED IN THE SURFACE WATER SEDIMENT, AND GROUNDWATER NEAR THE SITE DOWNSTREAM SEDIMENT SAMPLE TAKEN FROM THE BRAZOS RIVER WHICH FORMS THE NORTHERN BORDER OF THE SITE, SHOW SLIGHTLY HIGER CONCENTRATIONS OF METALS THAN IN THE UPSTREAM SEDIMENT SAMPL VOC'S HAVE HAVE BEEN DETECTED IN THE SHALLOW AQUIFER. HOWEVER TO DATE NO CONTAMINATION HAS BEEN DETECTED IN THE DEEP AQUIFER.