THIS SETTLEMENT AGREEMENT IS MADE AND ENTERED INTO BY EPA AND NL INDUSTRIES, INC AND CONCERNS THE DUTCH BOY SITE LOCATED IN CHICAGO ILLINOIS. WITHIN 30 DAYS OF THE EFFECTIVE DATE OF THIS SETTLEMENT AGREEMENT, NL INDUSTRIES SHALL PAY EPA FOR $165,709.61, PLUS AN ADDITIONAL SUM FOR INTEREST ON THAT AMOUNT COLLECTED FROM 9/1/2008-12/29/2008, FOR THE RECOVERY OF PAST RESPONSE COSTS.