Congress Financial Corporation (Florida) 777 Brickell Avenue Miami Florida 33131 PO Box 010550 Miami Florida 33101 305 371 6671 Fax 305 371 9456 Congress Financial October 26, 1998 Mr. Richard T Kelecy Chief Financial: Officer Perma-Fix Environmental Services, Inc: 1940 NW 67th Place, Suite A Gainesville, FL 32653 Dear Dick: In response to your fax dated October 21, 1998, subject to our Loan and Security Agreement dated January 15, 1998, we do not object to the company' s repurchase of up to 500,000 shares of the company's common stock. Sincerely, Congress Financial Corporation (Florida) /s/Gary Dixon _______________________________ Gary Dixon Vice President GD/ha