Document pBK35D5z9MLGzwBzXmKQ5dy6

foot of air. The asbestos concentration on the second floor was 12 to 25 million particles per cubic foot of air. The Ohio Department of Health has recognized five million particles of asbestos dust per cubic foot of air as the maximum allowable concentration for an eight-hour daily exposure. Recommendations. Possible solutions to the dust problem are: Substitution of another material for asbestos. Installation of more efficient local exhaust systems. Furnishing suitable respirators for the operators. These should be worn continuously. That is 1947. Signature page is signed by the Chemistry Laboratory. Here we have our Exhibit OCF 659 dated May 5, 1955. THE COURT: It will be admitted in evidence.