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Particulates Not Otherwise Regulated (Total Dust)

General Description

Synonyms: Dust (total); "Inert" dusts; Nuisance dusts; PNOR (Note: includes all inert or nuisance dusts, whether mineral, inorganic, not listed specifically in 29 CFR 1910.1000)

OSHA IMIS code: 9135 (IMIS History: Dust [total] prior to 9/1/89)

Exposure Limits and Health Effects (Updated September 6, 2012)

Standard Set By Exposure Limit Health Effect Codes -- Health Effects and Target Organs
OSHA PEL - General Industry
See 29 CFR 1910.1000 Table Z-1 (PNOR) and 29 CFR 1910.1000 Table Z-3 (Inert or Nuisance Dust)
15 mg/m3 (50 mppcf) TWA HE10 -- lung disease
OSHA PEL - Construction Industry
See 29 CFR 1926.55 Appendix A
15 mg/m3 TWA HE10 -- lung disease
OSHA PEL - Shipyard Employment
See 29 CFR 1915.1000 Table Z - Shipyards
15 mg/m3 TWA HE10 -- lung disease
NIOSH REL Not established  
ACGIH TLV® No TLV established. See Appendix B of the TLV booklet for guidelines.
 
CAL/OSHA PELs 10 mg/m3 TWA
HE16 -- eye, skin, and respiratory irritation

mppcf = Millions of particles per cubic foot of air

Carcinogenic classification:

  • NTP: Not listed
  • IARC: Not listed
  • EPA: Not listed

EPA Inhalation Reference Concentration (RfC): Not established

ATSDR Inhalation Minimal Risk Levels (MRLs): Not established

NIOSH IDLH concentration: Not established

Notes on other potential health effects and hazards:

  1. Exposure to dusts may decrease pulmonary function (Shieh et al. 2012).
  2. The EPA National Ambient Air Quality Standard for particulate matter 10 microns and below (a slightly smaller size fraction than total dust sampled by OSHA's method) is 150 μg/m3 averaged over a 24-hour period. (EPA 2006).

Partial reference list:

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Particulates (Insoluble and poorly soluble) Not Otherwise Specified (PNOS). 2016.
  • EPA Particle Pollution. 2006.
  • EPA Integrated Science Assessment Particulate Matter, 2009.
  • Shieh, T.S., Chung, J.J., Wang, C.J., Tsai, P.J., Kuo, Y.C., and Guo, H.R.: Pulmonary function, respiratory symptoms, and dust exposure among workers engaged in early manufacturing processes of tea: a cohort study. BMC Public Health. 12:121, February 13, 2012.

Chemical Sampling Information

By Name

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

By CAS Number

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