N-Nitrosodimethylamine requirements

The construction requirements for N‑Nitrosodimethylamine (NDMA) are the same as those in the general industry standard at 1910.1003. Employers performing construction work must follow the requirements set out in 1910.1003 as applied through 1926.1116.

All employers and workers engaged in construction activities that involve N‑Nitrosodimethylamine (NDMA) must comply with the requirements identified by reference to 1910.1003. This means any construction employer whose work involves use, handling, storage, or potential exposure to NDMA must follow the controls, monitoring, training, and medical requirements set forth in 1910.1003 as incorporated into 1926.1116.

You can read the construction rule that applies to NDMA at 1926.1116, which states that the construction requirements are identical to those in 1910.1003. For the full substance of the NDMA requirements (exposure limits, controls, medical surveillance, etc.), review 1910.1003.

Yes. Construction employers must follow the same exposure controls and air monitoring requirements that are specified in 1910.1003. The text of 1926.1116 makes the construction requirements identical to 1910.1003, so any engineering controls, work practices, and monitoring obligations described there apply to construction work involving NDMA.

Yes—training and medical surveillance requirements that apply under 1910.1003 also apply to construction work under 1926.1116. Employers must implement the employee information, training, and medical provisions described in 1910.1003 when workers are potentially exposed to N‑Nitrosodimethylamine.

If the work is construction work, the rule at 1926.1116 applies and it incorporates the requirements of 1910.1003. In other words, construction employers follow 1926.1116 (which points to 1910.1003) for NDMA; general industry employers follow 1910.1003 directly. When work involves multiple types of operations, apply the standard that covers the work activity being performed (construction work follows the construction rule). See 1926.1116.

Yes. Construction employers must follow the PPE and respirator program requirements set out in 1910.1003 as incorporated by 1926.1116. Use the PPE selection, fit testing, maintenance, and medical evaluation steps specified in 1910.1003 whenever they are required for protecting workers from NDMA exposure.

Construction employers should consult 1910.1003 for the specific numeric exposure limits, sampling and analytical methods, and any action levels for N‑Nitrosodimethylamine, because 1926.1116 incorporates the requirements of 1910.1003.

Yes—recordkeeping obligations that are included in 1910.1003 apply to construction employers under 1926.1116. Employers must retain exposure monitoring and medical records as specified in 1910.1003 and applicable recordkeeping rules.

OSHA enforces the NDMA requirements for construction through the construction standard 1926.1116, which incorporates 1910.1003. State-plan OSHA agencies also enforce equivalent state rules where they have jurisdiction. For the substantive NDMA obligations (exposure limits, controls, training, medical surveillance), inspectors will look to 1910.1003 as applied through 1926.1116.

The first step is to follow the requirements in 1910.1003 as incorporated by 1926.1116: assess potential exposures and implement appropriate exposure controls (engineering, work practices, and PPE), and arrange for any required air monitoring, employee training, and medical surveillance. You should consult 1910.1003 to determine the specific steps required.

For task-specific interpretation, consult the text of 1910.1003, which 1926.1116 adopts for construction, and contact your local OSHA area office for guidance on how the standard applies to your particular construction activity. The official construction incorporation is stated at 1926.1116, and the full requirements are in 1910.1003.