Employees who work at hazardous waste sites who are not involved in cleanup.

OSHA interpretation letter to Niagara Mohawk Power Corp. stating that all employees on a hazardous waste site exposed or potentially exposed to hazardous substances are covered by HAZWOPER and require training under 29 CFR 1910.120(e), while office workers who do not enter contaminated areas need only be made aware of hot zone boundaries and emergency response provisions.