CASE SUMMARY: * THE BRIO REFINING SITE IS LOCATED APPROX 20 MILES STHEAST OF HOUSTON, TX, IN HARRIS COUNTY. THE SITE OCCUPIES APPROX 58.1 ACRES. PORTIONS OF THE SITE OCCUR BOTH NORTH AND SOUTH OF DIXIE FARM ROAD AND ARE DESIGNATED AS BRIO NORTH AND BRIO SOUTH. BRIO NORTH OCCUPIES 48.8 ACRES AND BRIO SOUTH COVERS 9.3 ACRES. THE SOUTHBEND SUBDIVISION BORDERS THE BRIO PROPERTY TO THE NORTHWEST. * THERE ARE 1,757 DRUMS ON THE SITE, MOST OF WHICH WERE GEN- ERATED DURING THE REMEDIAL AND SUPPLEMENTAL REMEDIAL INVESTI GATIONS. THE MAJOR SOURCES OF POSSIBLE CONTAMINATION ARE THE CLOSED IMPOUNDMENTS ON THE SITE AND THE CONTAMINATION THESE PITS HAVE CAUSED TO THE SHALLOWEST GROUNDWATER ACQUIFER. * THERE ARE APPROX 200,000 CUBIC YARDS OF CONTAMINATED PIT AND SUBSURFACE SOILS ON THE SITE, ASSOCIATED WITH 24 DIFFERENT PITS. BUT, THE SITE INVESTIGATIONS INDICATED THAT THERE IS BETWEEN 500,000 AND 700,000 CUBIC YARDS OF SOILS WITH MEASURABLE AMOUNTS OF CONTAMINATION. * 1,2-DICHLOROETHANE HAD THE HIGHEST CONCENTRATION OF ANY OF THE VOLATILE ORGANICS DETECTED IN TH