Corrections to 1994 air-contaminant exposure tables

NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

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.

(3) Endosulfan

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.

(4) Perlite

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.