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REGISTERED MAIL SOUTH CHARLESTON PLANT UNION CARBIDE CORPORATION CHEMICALS AND PLASTICS P.O. BOX 8004, SOUTH CHARLESTON, W. VA, 25303 July 33, 1978 Mr. S. R. Wassersug Environmental Protection Agency Region ill, Curtis Building, 2nd Floor 6th Walnut Streets Philadelphia, Pennsylvania 19106 Subject: Compliance Program, Vinyl Chloride Regulations Ref.: File No. 50-0760-10001 Dear Mr. Wassersug: The following is a status report of the compliance program for the South Charleston Plant, Union Carbide Corporation: 1) Safety relief valves No. 5639 and No. 5649 (both are included as part of Source No. 015) were Installed one month ahead of the Compliance Schedule final completion date of June 26, 1978. Notification was inadvertently omitted in the report dated June 9, 1978. 2) Because of operational problems, we have been unable to complete the installation of the following safety relief valves: No. 2023 (included as part of Source No. 012), Compliance Schedule final completion date , April 28, 1978. x No. 5641 and No. 5644 (Source No. 016), _0-q iiCC 105378 w Compliance Schedule final completion date July 15, 1978. -- 'i Safety relief valve No. 2023 was erroneously completed in a previous report. y' Mr. S. R. Wassersug July 31, 1978 Page 2 Final compliance has been achieved for the following: Source No. 012 (except for safety relief valve 2023, and Y-048*, 6660*) 013 014 (except for safety relief valve Y-848*) 015 (except for safety relief valve F-430*) Final Date Compliance Schedule Actual April 28, 1978 May 26, 1978 July 21, 1978 August 4, 1978 May 26, 1978 May 26, 1978 August 14, 1978 May 26, 1978 JLW/pl cc: Mr. C. G. Beard, II - WVAPCC Mr. D. M. Myers - WVAPCC Mr. W. C. Young - UCC Very truly yours, $1. J. L. Worstell Environmental Protection Coordinator "" *For further explanation of the status of these four safety relief valves, refer to my letter of January 30, 1978 to Mr. Abraham Ferdas. Occ 105379 be: Mr. M. A. Aitken Mr. W. T. Gray Mr. L. R. Hart Mr. R. T. Kramer Mr. R. E. McEldowney Mr. R. J. Murawski MBBH Mr. G. G. Weissert Mr. H. L. Wise UCC 105380