They Knew: The Solvents in the Drum
They Knew: The Solvents in the Drum
The asbestos timeline on this site runs back to 1918. This one is shorter, and in a way harder to excuse. The two solvents at the center of it — trichloroethylene (TCE) and carbon tetrachloride — were documented poisons in the standard references of the 1940s: named, described, and given exposure limits roughly twenty years before the Navy put young radiomen to work cleaning teletype parts in them, bare-handed, in a fog-like agitator process, with no masks, no gloves, and no warning. The knowledge existed. What was missing was not knowledge. It was protection.
The timeline
1920s — Carbon tetrachloride’s liver toxicity is in the literature. Carbon tetrachloride’s power to destroy the liver is documented in the medical literature after deaths and liver injuries from its medicinal use — it was given as a hookworm treatment — and from its industrial use. On toxicity grounds it is progressively withdrawn from consumer uses, including fire extinguishers. A solvent too dangerous to sell to the public for a fire extinguisher remains, for decades, an ordinary industrial degreaser.
1930s–1940s — TCE’s neurotoxicity is reported, case by case. The occupational-medicine literature of these decades reports trichloroethylene’s effects on the nervous system — including trigeminal nerve injury in degreasing workers, the men who cleaned metal parts in TCE vapor and liquid. The pattern of injury is described in the journals of the field while the work itself continues unchanged in shops, depots, and training schools.
1940s — The limits exist, on paper. The American Conference of Governmental Industrial Hygienists (ACGIH) publishes threshold limit values for industrial solvents — the same ACGIH limit system that a federal court would later note, in the asbestos litigation, that workers were never told about. Exposure limits for these solvents existed on paper a generation before the teletype training of the 1960s. The limits were written down. The men doing the work never saw them.
1949 — The standard textbook names both. Hamilton & Hardy’s Industrial Toxicology (2nd edition, 1949) — the standard reference of American occupational medicine — describes carbon tetrachloride as a potent liver and kidney poison, and TCE as a narcotic, neurotoxic solvent requiring controlled handling. This is not obscure literature. It is the textbook. By 1949, what these two solvents do to the human body is settled, published, professional knowledge.
1960s — The training. Against that record, set one man’s account of his own training, given in his own words decades later: during teletype repair training, exposure to trichloroethylene and carbon tetrachloride was common; the chemicals were used in a fog-like agitator process without protective equipment like masks or gloves; prolonged skin exposure caused severe irritation, with skin turning flaky white. His son adds, from his father’s telling across the years: the cleaning ran in 55-gallon drums, telecommunications parts washed in the solvent, hands in the drums. His full account is at The Radioman.
1973 — A court names the gap. In Borel v. Fibreboard Paper Products Corp., 493 F.2d 1076 (5th Cir. 1973) — an asbestos case, decided on a full trial record — the court found that the manufacturers had never warned the workers and never told them the ACGIH exposure limits that existed. The gap this page names is the same gap, in a different trade: the limit in the book, and the man at the drum who was never told there was a book.
The gap
That is the whole of this article, and it does not need embellishment. By the time radiomen of the Vietnam era were trained, carbon tetrachloride had been a documented liver poison for some forty years, TCE’s nerve injuries had been in the journals for thirty, the standard textbook had described both for over a decade, and exposure limits had existed on paper for a generation. Nobody told the men in the room. The trainer, the radioman remembered, worked under the same conditions — the silence ran all the way down the chain, because the knowledge had never been carried from the literature to the training floor.
What this timeline is — and what it is not
The discipline of this series, stated plainly: this timeline destroys the “nobody knew” excuse. It does not, by itself, prove any one man’s claim. What a solvent did to a particular veteran’s body is a medical question, answered case by case, on medical evidence. What cannot survive this timeline is the defense that the dangers were unknowable when the training was given. They were known, published, textbook-settled, and limited on paper — a generation before the fact.
If you cleaned teletype or communications equipment in solvent — or you are the widow of a man who did — Tell Your Story. The full pattern is at They Knew — The Pattern, and the asbestos timeline is at They Knew: Asbestos and the Navy.