The Rule Document on Occupational Exposures to Hazardous Chemicals in Laboratories, page 3300 in the Federal Register issue dated 1/31/90, is to be corrected as follows: Page 3327, second column in 1910.1450(a) (3)(i), in the fifth line, "subpart 2" should read "subpart Z". On page 3335, in Appendix B to 1910.1450, in the second column, 18th line, "3." should read "4."