- Standard Number:
OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.
February 23, 1996
MEMORANDUM: REGIONAL ADMINISTRATORS FROM: STEPHEN MALLINGER Acting Director Directorate of Technical Support SUBJECT: Errors in 29 CFR 1910.1000, Tables Z-1 and Z-3
A number of errors were recently identified by the field and National Office staffs in the 1994 edition of 29 CFR 1910.1000 (Tables Z-1 and Z-3) and were brought to the attention of the Directorate of Technical Support, Office of Science and Technology Assessment. These errors are listed below.
Table Z-1 entries:
(1) Cyanides (as CN)
- This entry requires an "x" notation in the "skin designation" column.
(2) 1,2 - Dibromo-3-chloropropane (CBCP)
- The acronym (CBCP) is incorrect. It should read DBCP.
- The entry for endosulfan and its corresponding PEL should be deleted. The PEL listed is a carry-over from the "Final Rules" of the 1989 Air Contaminants Standard (29 CFR 1910.1000) which was vacated by the U.S. Court of Appeals, Eleventh Circuit. This substance was not listed in the air contaminant tables when OSHA adopted the consensus standards on May 29, 1971 (36 FR 10466) and consequently is not currently regulated.
- The entries for perlite (respirable and total dust) and their corresponding PELs should be deleted. The entries are a carry-over from the "Final Rules" of the 1989 Air Contaminants Standard (29 CFR 1910.1000) which was vacated by the U.S. Court of Appeals, Eleventh Circuit.
- OSHA formerly regulated perlite under the generic nuisance dust limits of 15 mg/m(3) total dust and 5 mg/m(3) respirable fraction. Consequently, perlite is currently regulated under the entry "particulates not otherwise regulated."
(5) 2,4,6 - Trinitrophenyl; see Picric acid
- The spelling of Trinitrophenyl is incorrect. It should read Trinitrophenol.
(6) Uranium (insoluble compounds)
- The PEL listing of 0.05 mg/m(3) is incorrect. The correct value is 0.25 mg/m(3).
Table Z-3 entries:
(1) Coal Dust
- The formula for the PEL for coal dust with less than 5% quartz (respirable fraction) is incorrectly listed as:
2.4 mg/m(3) -------------------- % SiO(2) + degrees 2
- The PEL for coal dust with a respirable quartz fraction of less than 5% should be 2.4 mg/m(3).
- We request that the above information be forwarded to all area offices. The Director of Health Standards will take steps toward correcting the above noted errors. The corrections will ultimately be published in the Federal Register.
- If you have any questions, please contact Mr. Ira Wainless or Mr. MacArthur Cheeks, members of my staff, at (202) 219-7056.