Industrial Hygiene

Occupational Heavy Metal Exposures

Last Updated: June 09, 2025


Most occupational exposures to heavy metals are associated with metal working and machining, including but not limited to fabrication, smelting, welding, forges, foundries, grinding, refinishing and repair work. ​

DCPH-A IH Role:

IHs are typically involved in sampling (both area & personal) for heavy metal exposures. ​IH would also be involved in implementing controls to help minimize or eliminate heavy metal exposures.

Occupational Exposure Limits:

The most current and conservative occupational exposure limits (OEL) are listed below, Army Guidance is being used until a DoD Consensus is reached ​.

Beryllium

TLV 0.00005 mg/m3 (inhalable fraction)​​

Cadmium

OSHA PEL TWA  0.005 mg/m3 (total fraction)

ACGIH TLV  TWA 0.002 mg/m3 (respirable fraction)​

Hexavalent Chromium

ACGIH TLV 0.0002 mg/m3 (inhalable fraction); STEL 0.0005 mg/m3  (inhalable fraction)​

Lead

OSHA PEL TWA 0.05 mg/m3​


Army Regulations and Guidance:

Army Safety WebsiteExternal Link


Federal Regulations and Guidance:



DCPH-A IH Field Services can help Installation IHs by providing  comprehensive occupational heavy metals surveys, in-depth studies, and desktop or onsite consultations upon request. 

To request assistance, please submit a request to the DHA Operations Center. Please visit Contact Us​​ for more details.