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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 1910.1000)
  • OSHA IMIS Code Number: 9135 (IMIS Name History: Dust [total] prior to 9/1/89)
  • NIOSH Pocket Guide to Chemical Hazards - Particulates Not Otherwise Regulated: Physical description, chemical properties, potentially hazardous incompatibilities, and more

Exposure Limits and Health Effects

Exposure Limit Limit Values HE Codes Health Factors and Target Organs
  • 15 mg/m3
  • (50 mppcf*) TWA

HE10

Lung disease

  • 15 mg/m3
  • TWA

HE10

Lung disease

  • 15 mg/m3
  • TWA

HE10

Lung disease

  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL)
  • See Appendix D

Not established

 

 

  • American Conference of Governmental Industrial Hygienists (ACGIH) Guideline
  • 10 mg/m3
  • TWA (inhalable particles)

HE16

Eye, skin, and respiratory irritation

CAL/OSHA PELs

  • 10 mg/m3
  • TWA

HE16

Eye, skin, and respiratory irritation

*mppcf = Millions of particles per cubic foot of air

  • National Toxicology Program (NTP) carcinogenic classification: Not listed
  • International Agency for Research on Cancer (IARC) carcinogenic classification: Not listed
  • U.S. Environmental Protection Agency (EPA) carcinogenic classification: Not listed
  • EPA Inhalation Reference Concentration (RfC): Not established
  • Agency for Toxic Substances and Disease Registry (ATSDR) Inhalation Minimal Risk Level (MRL): Not established
  • NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 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).
  • Date Last Revised: 12/11/2012
  • Literature Basis:
    • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Particulates (Insoluble) Not Otherwise Specified (PNOS). 2001.
    • 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, Febuary 13, 2012.

Monitoring Methods used by OSHA

Laboratory Sampling/Analytical Method:
  • tared (pre-weighed) 37-mm diameter low-ash polyvinyl chloride filter
  • maximum volume: 960 Liters
  • maximum flow rate: 2.0 L/min--DO NOT USE A CYCLONE--
  • current analytical method: Gravimetric
  • method reference: OSHA Analytical Method (OSHA PV2121)
  • method classification: Partially Validated
  • note: OSHA personnel can obtain tared sampling media from SLTC.
  • note: If the filter is not overloaded, samples can be collected up to an 8-hour period.

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