THIS CASE INVOLVES 4 NPL SITES: THE CANNONS BRIDGEWATER SITE IN BRIDGWATER, MA, CANNONS PLYMOUTH SITE IN PLYMOUTH,MA THE GILSON RD SITE IN NASHUA, NH, & THE TINKHAM'S GARAGE SITE IN LONDONDERRY, NH. THIS IS AN ACTION UNDER SECT 107 OF CERCLA TO RECOVER PAST COSTS AND TO ESTABLISH LIABILITY AS TO FUTURE COSTS TO BE INCURRED UNDER SECT 104. EPA SEEKS TO RECOVER THE APPR. $16,000,000 IT HAS INCURRED IN RESPONSE COSTS TO DATE; IT ALSO SEEKS TO ESTABLISH LI- ABILITY FOR ANY FUTURE RESPONSE COSTS THAT EPA INCURS AT THE 4 SITES. THE CURRENT ESTIMATE FOR TOTAL PAST AND FUTURE RE- SPONSE COSTS AT THE 4 SITES IS $47,800,000. 2 SIGNIFICANT LEGAL ISSUES ARE PRESENT IN THIS CASE: 1. LI- ABILITY FOR THE REMOTE SITES IS ASSERTED AGAINST THE BRIDGE- WATER GENERATORS LIABLE EVEN THOUGH THEY DID NOT SELECT THESE SITES AS THEIR DISPOSAL LOCATION; AND 2. THIS CASE SEEKS TO ESTABLISH THAT GENERATORS WHO SENT THEIR WASTE TO A CENTRAL SITE, WHERE IT WAS COMMINGLED W/OTHER GENERATORS' WASTE AND THEN SENT TO VARIOUS REMOTE SITES, ARE LIABLE FOR THE REMOTE SITES EVEN IF EPA CANNOT PROVE, DUE TO THE COM- MINGLING, THAT A PARTICULAR GENERATOR'S WASTE WAS SENT TO A GIVEN REMOTE SITE. ALTHOUGH THE LIT REPORT ONLY PROPOSES NAMING APPROX. 40 CORE DEFENDANTS, THE AGENCY HAS IDENTIFIED CLOSE TO 600 PO- TENTIALLY RESPONSIBLE PARTIES (PRPS)