Hazard Analysis — Engineered Nanomaterials

OSHA has no specific regulation or Permissible Exposure Limit (PEL) for any engineered nanomaterial.

NIOSH has an REL for carbon nanotubes of 1 µg/m³ elemental carbon as a respirable mass 8-hour time-weighted average (TWA) concentration for up to a 40-hour week. NIOSH also has an REL for ultrafine titanium dioxide of 0.3 mg/m³ as a time-weighted average (TWA) concentration for up to 10 hours/day during a 40-hour week.

The OSHA respiratory protection standard under 29 CFR 1926.103 would apply for construction workers exposed to engineered nanomaterials from nano-enabled construction products.

For engineered nanomaterials that have been found to be hazardous, OSHA’s hazard communication standard under 29 CFR 1926.59 would apply, including training for construction workers and access to Safety Data Sheets (SDS) for the nano-enabled product.

Federal OSHA has identified other of its standards that may apply to engineered nanomaterials.

Federal OSHA Standards are enforced by the U.S. Department of Labor in 26 states. There are currently 22 states and jurisdictions operating complete State plans (covering both the private sector and state and local government employees) and 5 - Connecticut, Illinois, New Jersey, New York and the Virgin Islands - which cover public employees only. If you are working in one of those states or jurisdictions you should ensure that you are complying with their requirements.

Federal OSHA Standards are enforced by the U.S. Department of Labor in 26 states. There are currently 22 states and jurisdictions operating complete State plans (covering both the private sector and state and local government employees) and 5 - Connecticut, Illinois, New Jersey, New York and the Virgin Islands - which cover public employees only. If you are working in one of those states or jurisdictions you should ensure that you are complying with their requirements.

There is no evidence at the present time that workers exposed to engineered nanomaterials have experienced harmful health consequences to themselves, but laboratory animal testing has shown that some engineered nanomaterials can be hazardous. That makes it important to consider conducting medical screening and hazard surveillance of workers who may be exposed to engineered nanomaterials. NIOSH has issued a document to help employers and workers implement such a program: Current Intelligence Bulletin 60. Interim Guidance for Medical Screening and Hazard Surveillance for Workers Potentially Exposed to Engineered Nanoparticles (NIOSH Pub# 2009-116).

When workers are exposed to engineered nanomaterials, NIOSH provides general guidance that recommends that employers conduct hazard surveillance to identify and document the presence of engineered nanomaterials in their workplaces, the work tasks involved with them, and the control measures that can effectively protect workers from hazardous exposures. NIOSH also recommends establishing medical surveillance to detect early signs of work-related illness and disease. Medical surveillance elements typically include medical and occupational histories, initial and periodic medical examinations, specific medical screening tests when necessary, post-incident examinations following uncontrolled or non-routine increases in exposures, and worker training to recognize symptoms of exposure to a particular hazard.

Due to insufficient evidence of harm to workers, NIOSH does not recommend any specific medical tests for workers exposed to engineered nanomaterials except for workers exposed to carbon nanotubes. For carbon nanotubes, NIOSH believes that exposed workers may be at risk of experiencing harmful effects to the lungs and recommends an initial evaluation that includes a spirometry test and a baseline chest X-ray with periodic evaluations to be performed at regular intervals. Additional details on the specifics of medical testing for workers exposed to carbon nanotubes can be found in the NIOSH Current Intelligence Bulletin 65. Occupational Exposure to Carbon Nanotubes and Nanofibers.