SETTLORS ARE GENERATOR-PRPS WHO BROUGHT OLD BATTERIES AND OTHER LEAD-CONTAINING MATERIAL TO THE SITE FOR RECYCLING. SITE IS A LEAD SMELTER OWNED AND OPERATED BY NL INDUSTRIES. EMISSIONS FROM SMELTER CONTAMINATED THOUSANDS OF RESIDENCES, AS WELL AS SITE ITSELF AND GROUNDWATER. IN 1990, EPA ISSUED UAOS TO GENERATORS AND OWNERS WHO COLLECTIVELY REFUSED TO COMPLY. 1993 PRPS SUCCESSFULLY SUED FOR PRE-ENFORCEMENT REMEDY REVIEW, SPECIFICALLY ON ISSUE OF REQUIRED CLEANUP LEVELS. U.S. EPA ISSUED NEW DECISION DOCUMENT RE-AFFIRMING CLEANUP LEVELS OF 500 PPM AND BEGAN RD/RA. SETTLORS OFFER- ED TO PERFORM RD/RA, A SEP, AND PAY A PORTION OF PAST COSTS AND A PENALTY FOR UAO NONCOMPLIANCE AND SIGNED THIS CONSENT DECREE. NEGOTIATIONS CONTINUE WITH NL INDUSTRIES. GENERATOR/SETTLORS' CONSENT DECREE LODGED.