(a) The following material is incorporated by reference and referred to at Sec. 63.2984: chapters 3 and 5 of ``Industrial Ventilation: A Manual of Recommended Practice,'' American Conference of Governmental Industrial Hygienists, (23rd edition, 1998). The incorporation by reference of this material is approved by the Director of the Office of the Federal Register as of the date of publication of the final rule according to 5 U.S.C. 552(a) and 1 CFR part 51. This material is incorporated as it exists on the date of approval and notice of any change in the material will be published in the Federal Register.
(b) The materials referenced in this section are incorporated by reference and are available for inspection at the National Archives and Records Administration (NARA); and at the Air and Radiation Docket and Information Center, U.S. EPA, 401 M Street SW, Washington, DC. For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal--register/ code--of--federal--regulations/ ibr--locations.html. The material is also available for purchase from the following address: Customer Service Department, American Conference of Governmental Industrial Hygienists (ACGIH), 1330 Kemper Meadow Drive, Cincinnati, OH 45240, telephone number (513) 742-2020. [67 FR 17835, Apr. 11, 2002, as amended at 69 FR 18803, Apr. 9, 2004]