A stay of the new exposure limits for nitroglycerin and ethylene glycol dinitrate is granted to the explosives industry until 4/27/90. OSHA reduced exposure limits for 375 air contaminants on 1/19/89 (54 FR 2332). The 9/1/89 start-up date of the Final Rule Limits column (new) exposure limits for nitroglycerin and ethylene glycol dinitrate for the explosives industry was stayed until 4/1/90, and effective that date, is extended until 4/27/90. Section 1910.1000, Table Z-1-A is amended to reflect this action and to show a stay until 9/1/90 for the acetone TWA for certain "doffers" in the cellulose acetate fiber industry; and until the decision on the merits of the Eleventh Circuit Court of Appeals in the case of Courtaulds Fibers Inc. v U.S. Department of Labor, for the Ceiling for carbon monoxide for blast furnace operations, vessel blowing at basic oxygen furnaces and sinter plants in the steel industry. The general authority for part 1910, subpart Z, and the authority for 1910.1000 are also revised. For information contact James Foster 523-8151.