Dust Abatement Team Memo on the Friction Materials Department at Manville (1959)

A one-page memorandum of May 26, 1959, on the dust abatement program in the Friction Materials department (Department 130) at J-M's Manville, New Jersey, plant, reporting a meeting of the Dust Abatement Team on May 21. The team planned to replace a small dust washer with a larger one and rebuild the dust collection system, and listed rechecked dust counts at seven machines against a maximum allowable count of 5.0. Readings at the Yates bandsaw ran from 8.87 to 10.81, more than double the limit; a respirator was recommended for the operators of the DeWalt saw, the FitzPatrick mixer and the Yates bandsaw, and a flexible hose collector was to be installed at the bandsaw.

In Johns-Manville's chronology

Johns-Manville's own chronology of what the company knew describes this document as follows:

H.A. Riker (Manville P&FM) memorandum regarding a meeting of the dust abatement team held on 5/21/59. Discusses dust control efforts and mentions dust counts at certain stations. TLV applied is 5 mppcf. States that a respirator is recommended for the operator of the DeWalt Saw (5.26 mppcf). FitzPatrick mixer (4.76 mppcf). and Yates Bandsaw (10.81 mppcf).