Robert A. Kehoe

Robert Arthur Kehoe (

Kehoe was born in Georgetown, Ohio, on November 18, 1893, to Jeremiah and Jessie Kehoe.

Robert studied at Ohio State University. After his graduation at the University of Cincinnati (UC) medical school in 1920 he was a resident in pathology at the Cincinnati General Hospital.

Shortly after obtaining his M.D. he married Lucille Marshall.

Occupational health

When he was an instructor in the UC Department of Physiology in 1924, he was hired by

In 1930, he became the director of the newly created University of Cincinnati (UC) Kettering Laboratory of Applied Physiology, the first university-based laboratory devoted to toxicological problems peculiar to industry.[5] The laboratory was funded by the stakeholder companies, GM, DuPont, and Ethyl Corporation.

At the Kettering Laboratory, Kehoe was commissioned by DuPont to produce a study with the goal of showing that the carcinogen 2-Naphthylamine, then widely used by DuPont and shown to produce cancer in nine out of ten employees exposed to it, was safe.^[6] Kehoe was named Professor of Industrial Medicine at UC and put together an interdisciplinary team to investigate occupational-health issues.

Kehoe performed industry-sponsored research that spanned decades.^[7] One of the people who was involved in this research was a co-author, Ivan F. Ferneau, who Kehoe said was administered potentially dangerous amounts of lead.^{[8][9][10][11]}

From at least 1948 though 1968, Kehoe was involved with the

Although lead had been known to be highly toxic since antiquity,[24] Kehoe’s beliefs were not seriously contested until after Clair Cameron Patterson’s publication in 1965.^[25] Patterson argued that global lead contamination was taking place and that it had started gradually with the Industrial Revolution but had been markedly accelerated once leaded gasoline had entered the market.^[22]

In a 1966 government hearing chaired by Senator Edmund Muskie, Kehoe stated that his laboratory "was the only source of new information (about lead exposure)" and "had wide influence (in the US and abroad) in shaping the point of view and activities... of those who are responsible for industrial and public hygiene".^[26]

Because leaded gasoline had been found "safe" by the U.S. Surgeon General in the 1920s (see below), and ambient lead had been "demonstrated" through Kehoe's work to not constitute a public health hazard over the succeeding decades, it took years for Patterson's findings to change the prevailing view of the toxicity of ambient lead. The validation of Patterson's refutation of Kehoe's research required new, more precise research by several others, but ultimately the medical/public health argument prevailed. Kehoe's work is now considered discredited. By 2014, a majority of countries had discontinued the use of leaded gasoline in automobiles. Yet leaded gasoline continues to be produced and used, for example, for private aviation in the United States.^[27]

The Surgeon General's review of gasoline lead and the Kehoe Rule

The Kehoe Rule had two significant characteristics. First, it placed the burden of proof on the opponents of tetraethyl lead, who would have to show that use of TEL was unsafe if any constraint on its use were to be instituted.[3] If the finding of fact was inconclusive and did not provide an uncontestable showing of proof, then TEL would be allowed. Second, it balanced the interest in protecting public health against the economic benefits of TEL, which the advocates of TEL had promised would be in the form of conservation of fuel. The alternative approach, the precautionary principle,^[31] would have required proof that TEL was safe before it could be used. While the Kehoe Paradigm^[3][32] (or Kehoe Rule)^[4][33] assumes that in the absence of clear evidence of risk, there is no risk of significance, the precautionary principle assumes that there is a possible risk until it is proved otherwise. Nriagu asserted that with the large investments by industry, the social and economic climate of the time, and the belief in progress, the outcome of the 1925 conference was preordained.^[3] TEL production resumed, and soon, leaded gasoline was commonly used. That there were alternatives to the use of TEL was falsely denied by the industry.^[32]

Application of the Kehoe Rule made it critical for the industry to fund and control the research in lead toxicity. That was done through the Kettering Laboratory, under Kehoe’s direction. The Kehoe Rule was beneficial to those engaged in the gasoline lead industry, as all that was necessary was to characterize any criticism as fraught with uncertainty. In the case of lead toxicity, Kehoe's laboratory dominated the scene for decades, attesting to the safety of leaded gasoline and deconstructing any criticism. The credibility of Kehoe's research was bolstered for decades by the support of the

Using the Kehoe Rule, Ethyl Corporation was a winner in either situation: if its product was actually safe, Ethyl would be seen as a responsible party. If, however, its product was unsafe, it would take decades to demonstrate that with certainty. The process of getting to certainty could be prolonged by challenging the methods and results and calling for more data, and while it was going on the product would continue to generate profits.[4] Kitman indicates that the strategy taken by the lead industry, referring to use of the Kehoe Rule, similarly "provided a model for the asbestos, tobacco, pesticide and nuclear power industries, and other(s)... for evading clear evidence that their products are harmful by hiding behind the mantle of scientific uncertainty."^[4] Kettering Laboratories under Kehoe's leadership also certified the safety of the fluorinated refrigerant, Freon, "another environmentally insensitive GM patent that would earn hundreds of millions before it was outlawed."^[4]

Death

Kehoe retired in 1965. He became Professor Emeritus of Occupational Medicine at the University of Cincinnati upon his retirement.^[34] Kehoe Hall, part of the Kettering Lab Complex at the university, was completed in 1963 and is named in his honor.^{[citation needed]} Kehoe wrote of having an illness in 1973.^[35] He died in Cincinnati in 1992 at the age of 99.

References