Industrial Union Dept., AFL-CIO v. American Petroleum Institute

1980-07-02

Headline: Court blocks OSHA benzene rule, saying agency must first find a significant workplace risk before imposing costly 1 ppm limit, affecting industry controls, monitoring, and medical testing.

Holding:

Real World Impact:

Requires OSHA to prove a significant workplace risk before stricter toxic limits.
Stops immediate enforcement of OSHA’s 1 ppm benzene limit pending new findings.
Highlights high compliance costs and uncertain health benefits for affected industries.

Topics: chemical exposure, workplace safety, OSHA rules, carcinogens, regulatory process

Summary

Background

The dispute involved the Secretary of Labor’s safety rule limiting workplace airborne benzene to 1 part per million (1 ppm). OSHA also set a 0.5 ppm "action level" that triggers monitoring and medical exams and banned most skin contact with benzene liquids, with limited percentage exclusions. Industry groups challenged the permanent rule after a blocked emergency standard; a federal appeals court struck down the 1 ppm limit on review.

Reasoning

The Court ruled that before issuing a permanent toxic-chemical standard OSHA must first find the substance presents a significant risk of material harm at current exposure levels. The plurality said the Agency could not rely simply on a general carcinogen policy that assumes no safe level and then set the lowest feasible limit. Because OSHA did not make the required threshold finding and relied on its no-safe-level approach, the Court affirmed the appeals court’s remand for further findings.

Real world impact

The rule would have required extensive monitoring, engineering changes, and medical testing and carried large first-year and capital costs the agency estimated at about $187–$205 million in operating costs, $266 million in capital outlays, and roughly $34 million annually thereafter. OSHA estimated roughly 35,000 workers would directly benefit from lowered exposures; many gasoline station employees were excluded from the rule. The Court’s decision requires OSHA to make clearer factual findings before enforcing such costly limits.

Dissents or concurrances

Justices Powell and Rehnquist agreed with the judgment but wrote separately; Powell emphasized deference when evidence is sufficient and discussed economic considerations, while Rehnquist raised nondelegation concerns. Justice Marshall, joined by three colleagues, dissented and would have upheld the rule as supported by substantial evidence.