The standards include anyone who is exposed or potentially exposed to hazardous materials and who are engaged in one of the following operations (as specified by 1910.120(a)(1)(i-v) and 1926.65(a)(1)(i-v):

1. Government-required clean-up operations
2. Corrective actions covered by the Resource Conservation and Recovery Act of 1976 (RCRA)
3. Voluntary clean-up operations at uncontrolled hazardous waste sites
4. Operations at Treatment, storage, and disposal facilities (TSDF) which involve hazardous waste
5. Emergency response operations where there is a threat involving the release of hazardous substances