O. H. Cilley to Sumner Simpson on the Pennsylvania Dust Survey at Manheim (1944)

A one-page letter of November 16, 1944, from O. H. Cilley, assistant general manager of Raybestos-Manhattan's United States Asbestos Division at Manheim, Pennsylvania, to Sumner Simpson, the company's president, with copies to Rohrbach and G. R. Weber. The Bureau of Industrial Hygiene of the Pennsylvania Department of Labor and Industry had just analyzed the air in the plant, especially the textile mill, and "have given us a clean bill of health." Most samples were under 5,000,000 particles per cubic foot and none over 7,000,000; Mr. Willard, in charge of the survey, had "no recommendations to make."

What it shows

Cilley wrote that the state's inspectors were "greatly surprised to find the high efficiency of dust control and removal in our plant." The figures are measured against the 5 million particle level that the Industrial Hygiene Foundation had called good in the spring (Cilley's letter of May 2). Cilley sent the state's written report on November 24 (his covering letter).

In Johns-Manville's index

Johns-Manville's attorneys indexed the Sumner Simpson Papers. Their index describes this document as follows:

Informs that the Penn. Dept of Labor and Industry completed an analysis to determine dust levels in the Manheim Plant. Dept of Labor gave plant a clean bill of health and stated surprise at high efficiency of dust control and removal. No recommendations made.

Related documents

• O. H. Cilley to Sumner Simpson Enclosing the Pennsylvania Survey of the Manheim Textile Mill (1944)
• Sumner Simpson to O. H. Cilley Acknowledging His Letter on the Pennsylvania Dust Analysis (1944)
• O. H. Cilley to Sumner Simpson on Industrial Hygiene Foundation Dust Counts at Manheim (1944)

About this copy

This is document 05570 of the Sumner Simpson Papers, as numbered in the collection's index.