ON NOVEMBER 14/19/89, BSC SUBMITTED TO THE ENVIRONMEN- TAL PROTECTION AGENCY, REGION III ( EPA ) AN INITIAL SOURCE REPORT AND REQUEST FOR A WAIVER OF COMPLIANCE FROM SUBPART L PURSUANT TO 40 C.F.R. SECTION 61.10 OF THE NESHAP. SEE ATTACHMENT I. BSC REQUESTED A WAIVER IN ORDER TO INSTALL A GAS BLANKETING SYSTEM TO RECOVER AND DESTROY BENZENE WITHIN ITS COKE BY-PRODUCT RECOVERY PROCESS, SO AS TO COMPLY WITH THE REQUIREMENTS OF SUBPART L. ON MAAY 4, 1990, THE REGION- AL ADMINISTRATOR GRANTED BSC A WAIVER OF COMPLIANCE WITH THE BENEZENEE