THIS IS A CERCLA CASE: POTENTIAL DEFENDANTS INCLUDE UNION CHEMICAL, ITS OWNER/OPERATOR, RAYMOND ESPORITO AND APPROX. 500 GENERATORS AND TRANSPORTERS. NEGOTIATIONS ARE SCHEDULE TO BEGIN IN MAY 1987 AND WILL FOCUS ON, 1. APPROX. 1.3 MIL- LION IN REMOVAL COSTS AND 2. PERFORMANCE OF RI/FS.