Source: https://www.federalregister.gov/documents/2016/09/01/2016-20442/occupational-exposure-to-respirable-crystalline-silica-correction
Timestamp: 2018-04-22 01:23:42
Document Index: 762318576

Matched Legal Cases: ['arts 1910', '§\u20091926', 'art 1911', 'arts 1910', '§\u20091910', '§\u20091915', '§\u20091915', 'art 1926', 'art 1911', '§\u20091926', '§\u20091926']

Federal Register :: Occupational Exposure to Respirable Crystalline Silica; Correction
A Rule by the Occupational Safety and Health Administration on 09/01/2016
81 FR 60272
List of Subjects in 29 CFR Parts 1910, 1915, and 1926
Appendix A to § 1926.55—1970 American Conference of Governmental Industrial Hygienists' Threshold Limit Values of Airborne ContaminantsStart Printed Page 60274
https://www.federalregister.gov/d/2016-20442 https://www.federalregister.gov/d/2016-20442
Annette Iannucci, Directorate of Standards and Guidance, Room N-3718, OSHA, U.S. Department of Labor, 200 Constitution Avenue NW., Washington, DC 20210; telephone (202) 693-1950; email Iannucci.annette@dol.gov.
On March 25, 2016, OSHA published a final rule entitled Occupational Exposure to Respirable Crystalline Silica (81 FR 16285-16890). The final rule retained the preceding permissible exposure limits (PELs) for respirable crystalline silica in general industry (29 CFR 1910.1000, Table Z-3), shipyards (29 CFR 1915.1000, Table Z), and construction (29 CFR 1926.55, appendix A), and added footnotes to make clear that these PELs apply to any sectors or operations where the new PEL of 50 ­μg/m3 is not in effect. The preceding PELs apply to operations that are not covered by the new standards, such as the processing of sorptive clays. The preceding PELs are also applicable during the time between publication of the silica rule and the dates established for compliance with the rule, as well as in the event of regulatory delay, a stay, or partial or full invalidation by the Court.
This document corrects typographical errors in the formulas for the preceding PELs, so that they will appear as they did prior to publication of the final rule.
This document was prepared under the direction of David Michaels, Ph.D., MPH, Assistant Secretary of Labor for Occupational Safety and Health. It is issued under the following authorities: Sections 4, 6, and 8 of the Occupational Safety and Health Act of 1970 (29 U.S.C. 653, 655, 657); section 107 of the Contract Work Hours and Safety Standards Act (the Construction Safety Act) (40 U.S.C. 3704); section 41 of the Longshore and Harbor Worker's Compensation Act (33 U.S.C. 941); Secretary of Labor's Order 1-2012 (77 FR 3912 (1/25/2012)); and 29 CFR part 1911.
Signed at Washington, DC, on August 5, 2016.
Accordingly, for the reasons set forth in the preamble above, the Occupational Safety and Health Administration is amending 29 CFR parts 1910, 1915, and 1926 as follows:
2. In § 1910.1000, in Table Z-3, revise the entries for “Silica: Crystalline Quartz (Respirable)”, “Silica: Crystalline Cristobalite”, and “Silica: Crystalline Tridymite” to read as follows:
Table Z-3—Mineral Dusts
mppcf a
mg/m 3
Quartz (Respirable) f 250b 10 mg/m3 e
% SiO2 + 5 % SiO2 + 2
Cristobalite: Use 1/2 the value calculated from the count or mass formulae for quartz.f
Tridymite: Use 1/2 the value calculated from the formulae for quartz.f
a Millions of particles per cubic foot of air, based on impinger samples counted by light-field techniques.
b The percentage of crystalline silica in the formula is the amount determined from airborne samples, except in those instances in which other methods have been shown to be applicable.
e Both concentration and percent quartz for the application of this limit are to be determined from the fraction passing a size-selector with the following characteristics:
The measurements under this note refer to the use of an AEC (now NRC) instrument. The respirable fraction of coal dust is determined with an MRE; the figure corresponding to that of 2.4 mg/m3 in the table for coal dust is 4.5 mg/m3K.
f This standard applies to any operations or sectors for which the respirable crystalline silica standard, 1910.1053, is stayed or is otherwise not in effect.
4. In § 1915.1000, amend Table Z by:
a. Revising the entries for “Silica, crystalline, respirable dust, cristobalite”, “Silica, crystalline, respirable dust, quartz”, “Silica, crystalline, respirable dust, tripoli (as quartz)”, and “Silica, crystalline, respirable dust, tridymite”; and
b. Under the “MINERAL DUSTS” heading of the table, revising the entry for “Silica: Crystalline Quartz”.
Table Z—Shipyards
ppm a*
Cristobalite; see 1915.1053 14464-46-1
Quartz; see 1915.1053 5 14808-60-7
Tripoli (as quartz); see 1915.1053 5 1317-95-9
Tridymite; see 1915.1053 15468-32-3
mppcf (j)
Crystalline 250 (k)
Quartz. Threshold Limit calculated from the formula (p) % SiO2 + 5
5 See Mineral Dusts table for the exposure limit for any operations or sectors where the exposure limit in § 1915.1053 is stayed or is otherwise not in effect.
p This standard applies to any operations or sectors for which the respirable crystalline silica standard, 1915.1053, is stayed or otherwise is not in effect.
5. The authority citation for part 1926, subpart D, continues to read as follows:
Authority: Section 107 of the Contract Work Hours and Safety Standards Act (40 U.S.C. 3704); Sections 4, 6, and 8 of the Occupational Safety and Health Act of 1970 (29 U.S.C. 653, 655, 657); and Secretary of Labor's Order No. 12-71 (36 FR 8754), 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), 5-2002 (67 FR 65008), 5-2007 (72 FR 31160), 4-2010 (75 FR 55355), or 1-2012 (77 FR 3912), as applicable; and 29 CFR part 1911.
6. In § 1926.55, in appendix A, in the table titled “Threshold Limit Values of Airborne Contaminants for Construction”:
a. Revise the entries for “Silica, crystalline, respirable dust, cristobalite”, “Silica, crystalline, respirable dust, quartz”, “Silica, crystalline, respirable dust, tripoli (as quartz)”, and “Silica, crystalline, respirable dust, tridymite”;
b. Under the “MINERAL DUSTS” heading of the table, revise the entry for “Silica: Crystalline Quartz”
mg/m3 b
Cristobalite; see 1926.1153 14464-46-1
Quartz; see 1926.1153 5 14808-60-7
Tripoli (as quartz); see 1926.1153 5 1317-95-9
Tridymite; see 1926.1153 15468-32-3
Crystalline 250(k)
5 See Mineral Dusts table for the exposure limit for any operations or sectors where the exposure limit in § 1926.1153 is stayed or is otherwise not in effect.
* The PELs are 8-hour TWAs unless otherwise noted; a (C) designation denotes a ceiling limit.
p This standard applies to any operations or sectors for which the respirable crystalline silica standard, 1926.1153, is stayed or otherwise is not in effect.
[FR Doc. 2016-20442 Filed 8-31-16; 8:45 am]