Caseflicks

Supreme Court of the United States • 1980

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

448 U.S. 607 | 100 S. Ct. 2844 | 65 L. Ed. 2d 1010 | 1980 U.S. LEXIS 55

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Takeaway

In short, this case requires OSHA to identify a significant workplace health risk before imposing a more stringent toxic-substance standard; a carcinogen's mere lack of a proven safe threshold is not enough.

Background

OSHA regulated occupational exposure to benzene, a chemical known to cause leukemia and other serious blood disorders at high concentrations. A preexisting federal standard allowed average airborne exposure of 10 parts per million (ppm). Applying its general policy for carcinogens, OSHA concluded that, unless industry proved a safe exposure threshold, it would require exposure to be reduced to the lowest technologically and economically feasible level. OSHA therefore adopted a 1 ppm limit, along with monitoring, medical-surveillance, engineering-control, and dermal-contact requirements.

The evidence strongly linked high benzene exposures to leukemia and blood disease, but OSHA could not reliably quantify the risk at exposures at or below the existing 10 ppm limit. Its principal rationale for reducing the limit was that benzene is a carcinogen, no safe threshold had been proven, and lower exposure should reduce risk.

On pre-enforcement review, the Fifth Circuit invalidated the standard. It held that OSHA had not shown that the 1 ppm limit was "reasonably necessary or appropriate" under the Occupational Safety and Health Act, and reasoned that the anticipated benefits had to bear a reasonable relationship to the costs. The Supreme Court affirmed the remand to OSHA, though it did not resolve whether the Act requires cost-benefit balancing.

Issues

Issue #1

Whether the Occupational Safety and Health Act permits OSHA to regulate a toxic substance to the lowest feasible level merely because it is a carcinogen and no safe exposure threshold has been proven.

Holding

No. Before issuing a permanent toxic-substance standard, OSHA must find that the existing workplace exposure creates a significant risk of material health impairment and that the new standard is reasonably necessary or appropriate to reduce that risk.

Reasoning

Section 3(8) defines an occupational safety and health standard as one reasonably necessary or appropriate to provide safe or healthful employment. That definition applies to permanent standards issued under § 6(b)(5), including standards for toxic substances. Section 6(b)(5) directs OSHA to choose the most protective feasible standard only after OSHA has determined that a standard is needed under the Act's general definition.

The Court rejected the premise that a workplace is unsafe whenever it presents any conceivable risk. Ordinary life and work entail some risks, but "safe" does not mean risk-free. A workplace is unsafe in the statutory sense only when workers face a significant risk of harm that can be reduced or eliminated by regulation.

The Act's structure and history supported that reading. Congress directed OSHA to set priorities among hazards, required explanations when OSHA materially changed consensus standards, and limited OSHA's emergency authority to situations involving "grave danger." Those provisions indicate that Congress expected OSHA to focus its regulatory power on meaningful hazards, not every theoretical risk.

Reading the Act to allow feasibility-limited regulation of every minute carcinogenic risk would give OSHA exceptionally broad authority to impose immense costs throughout the economy. The Court favored the narrower construction because it better fit the statutory language and avoided serious constitutional concerns about an unbounded delegation of legislative power.

OSHA bears the burden of showing, with substantial evidence and using the best available evidence, that it is at least more likely than not that long-term exposure at the existing level poses a significant risk of material health impairment. The agency need not establish risk with scientific certainty or calculate an exact probability of harm; it may use reputable scientific evidence and conservative assumptions when science is incomplete. But it must make a reasoned finding that the risk is significant.

Issue #2

Whether OSHA made the findings necessary to support reducing the airborne benzene limit from 10 ppm to 1 ppm.

Holding

No. OSHA relied on an impermissible no-safe-level carcinogen policy rather than finding that exposure at 10 ppm created a significant risk that the 1 ppm standard would materially reduce.

Reasoning

OSHA assembled substantial evidence that high benzene exposure can cause leukemia, aplastic anemia, blood abnormalities, and possibly chromosomal damage. But the record did not supply direct, reliable evidence that exposure at or below 10 ppm caused leukemia, and OSHA did not determine the magnitude of the risk at that level.

Rather than make the required threshold finding, OSHA reasoned that benzene is a human carcinogen, that industry had not proved a safe threshold, and that any nonzero exposure must therefore be treated as risky. It then selected 1 ppm because that level was feasible. This reasoning shifted the burden to industry to prove safety, even though the Act leaves OSHA with the ordinary burden of proving the need for a more stringent standard.

OSHA's statement that the benefits of the lower limit were likely to be appreciable did not cure the problem. The agency acknowledged that it could not construct a reliable dose-response relationship and did not identify a risk level at 10 ppm that it regarded as significant. The standard had to stand or fall on OSHA's actual findings, not on findings that might conceivably have been supported by the record.

The Court therefore affirmed the judgment remanding the airborne-exposure standard to OSHA for further proceedings. It did not decide what level of risk would be significant or whether the existing record could support a proper significant-risk finding on remand.

Issue #3

Whether the Act requires OSHA to balance a standard's expected benefits against its compliance costs after OSHA identifies a significant risk.

Holding

The Court did not decide the question.

Reasoning

The Fifth Circuit had held that OSHA must determine whether a standard's benefits bear a reasonable relationship to its costs. OSHA argued that § 6(b)(5) instead requires the agency to eliminate significant toxic risks as far as technologically and economically feasible, without ordinary cost-benefit balancing.

Because OSHA had failed at the threshold step of identifying a significant risk from exposure at the existing 10 ppm level, the Court found it unnecessary to resolve the parties' competing interpretations of feasibility and cost. That question was reserved for a case in which OSHA first established that regulation was reasonably necessary or appropriate.

Issue #4

Whether OSHA validly prohibited dermal and eye contact with liquid benzene.

Holding

No. The dermal-contact ban was invalid because OSHA did not find that such contact created a significant risk of material health impairment that made the ban reasonably necessary or appropriate.

Reasoning

OSHA adopted the dermal-contact restriction under the same carcinogen policy used for airborne exposure: in the absence of proof of a safe level, all feasible exposure routes should be limited. But this policy did not substitute for the required statutory finding of a significant risk.

The agency had to assume both that low-dose benzene exposure presents a carcinogenic risk and that benzene can be absorbed through the skin in sufficient quantities to create that risk. OSHA did not make findings establishing the significance of either proposition as to the regulated contact.

The Court therefore affirmed the invalidation of the dermal-contact restriction without deciding whether the Fifth Circuit was also correct that OSHA needed to obtain additional scientific information about dermal absorption under the Act's "best available evidence" requirement.

Concurrences

Chief Justice Burger

Reasoning

Chief Justice Burger agreed that OSHA had to make an understandable finding that the existing permissible exposure level posed a significant risk of material health impairment, and he agreed that OSHA had not made that finding here.

He emphasized that courts and agencies perform different functions. Once OSHA has considered the facts and complied with the statute, the decision whether a particular risk is significant is a policy judgment delegated to the agency, not an occasion for courts to revise substantive regulatory policy.

At the same time, he cautioned that responsible administration permits OSHA to refrain from regulating de minimis risks. In his view, the pursuit of perfect safety should not produce extravagant regulation of scant or minimal risks.

Justice Powell

Reasoning

Justice Powell agreed that §§ 3(8) and 6(b)(5) must be read together and that OSHA could not rely on an unadopted generic carcinogen policy to reduce every carcinogenic exposure to the lowest feasible level. He also agreed, though he viewed the question as close, that OSHA had not carried its burden on this record.

He differed from the plurality's characterization of OSHA's factual effort. OSHA had made general findings that benzene's hazards and the benefits of the 1 ppm rule justified the costs. Powell would have treated those findings as potentially sufficient to satisfy the significant-risk threshold if they were supported by substantial evidence.

Powell stressed that the Act does not require numerical risk quantification when no reasonable method can produce it. Where precise quantification is impossible, OSHA may rely on the weight of expert testimony and scientific evidence to find a significant hazard.

He would also have held that a standard is not "reasonably necessary" or "feasible" when its costs are wholly disproportionate to its expected health benefits. In his view, OSHA had not adequately explained how it determined that the substantial costs of the benzene rule were justified by its benefits.

Justice Rehnquist

Reasoning

Justice Rehnquist concurred only in the judgment, but on constitutional rather than statutory grounds. He believed that, when no safe exposure level is known, the first sentence of § 6(b)(5) gives the Secretary no intelligible principle for deciding where to set a permissible-exposure limit.

In his view, the statute's command to provide the greatest protection "to the extent feasible" left unresolved the fundamental legislative choice between spending industry resources to reduce marginal risks and tolerating some risk to preserve economic resources. Congress, rather than an administrative agency, had to make that basic policy choice.

He would have invalidated the first sentence of § 6(b)(5), as applied to substances for which a safe level is unknown or infeasible. Absent further congressional action, OSHA could then choose only between setting a safe standard and setting no standard under that provision.

Dissents

Justice Marshall

Reasoning

Justice Marshall, joined by Justices Brennan, White, and Blackmun, argued that the plurality invented a significant-risk threshold that Congress did not enact. Section 6(b)(5) expressly directs OSHA to set the standard that most adequately assures, to the extent feasible and on the best available evidence, that workers will not suffer material health impairment over their working lives.

In his view, § 3(8)'s phrase "reasonably necessary or appropriate" is a general definition that must be read in harmony with, not as a limitation overriding, the specific toxic-substance command in § 6(b)(5). Congress deliberately gave special protection against long-term and scientifically uncertain hazards such as carcinogens.

Marshall maintained that OSHA did not act mechanically under a no-risk policy. The agency compiled an extensive record, considered competing scientific evidence, found that benzene causes leukemia and other serious disorders, concluded that no safe level had been demonstrated, and determined that lowering exposure would reduce a real, though unquantifiable, risk.

Scientific uncertainty, he explained, was precisely why Congress instructed OSHA to act on the best available evidence rather than wait for definitive proof. Requiring OSHA to establish a quantified significant risk would often force workers to remain exposed to potentially fatal diseases until research caught up with the danger.

He also rejected an implied cost-benefit requirement. The statute requires feasibility, which he understood to mean technological and economic achievability, not proof that monetized benefits outweigh costs. Because OSHA found that affected industries could absorb the costs and that the rule would protect workers from material health hazards, he would have upheld both the airborne and dermal standards.