Dust Control

Dust control refers to the engineering measures, work practices, and protective equipment intended to reduce the amount of airborne asbestos fibers that workers and bystanders breathe in. Common methods include local exhaust ventilation, wet methods, enclosed processes, HEPA vacuuming, and respirators. In the asbestos industry, the phrase appears throughout internal corporate memos, trade association documents, and government reports from the 1930s onward.

Origin

The term came into industrial use in the early 20th century as silicosis and other dust diseases drew attention from public health officials. By the 1930s, asbestos manufacturers and insurers were using "dust control" in internal correspondence, most notably in the 1934 communications between Johns-Manville and Raybestos-Manhattan executives discussing how to manage asbestosis findings without alarming workers.

Significance in Asbestos Context

Historical dust-control records are often central evidence in asbestos cases because they show what companies knew about the hazard and when they knew it. Internal memos discussing "inadequate dust control," measured fiber counts, or decisions to delay installing ventilation equipment can directly establish corporate knowledge and conscious disregard for worker safety. Conversely, defendants often argue that they implemented "state of the art" dust control for their era, so the adequacy, timing, and enforcement of these measures at specific worksites becomes a contested factual question. For patients, identifying which employers, plants, or job sites had documented dust-control failures can strengthen the link between a specific exposure and the disease.

Example Sentence

The plaintiff's industrial hygienist testified that the shipyard's dust control program in the 1960s consisted of little more than open warehouse doors, despite internal memos acknowledging that fiber levels far exceeded recommended limits.

Related Terms

Threshold Limit Value (TLV), Industrial Hygiene, State of the Art Defense, Sumner Simpson Papers, OSHA Asbestos Standard, Engineering Controls

Notes

• If you or a family member worked in an industry with asbestos exposure, try to identify the employer, plant, building, and approximate dates. Investigators can then search for that site's specific dust-control records, OSHA citations, and industrial hygiene surveys.
• Ask coworkers or union representatives whether they recall ventilation systems, wet cutting practices, respirator use, or air-monitoring badges; their recollections can corroborate or contradict company claims about controls.
• Preserve any pay stubs, union cards, training certificates, or safety meeting notes. These documents can place you at a worksite during a period when dust-control deficiencies were documented.
• Companies often relied on the "state of the art" defense, claiming their controls met the standards of the time; your legal team will counter this with internal documents showing the company knew the standards were inadequate.