Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 43 - TUNNEL CONSTRUCTION AND COMPRESSED AIR WORK
Subchapter A - TUNNEL CONSTRUCTION AND WORK IN COMPRESSED AIR
TUNNEL CONSTRUCTION
Section 43.40 - Ventilation
Universal Citation: 34 PA Code ยง 43.40
Current through Register Vol. 54, No. 38, September 21, 2024
The constructor of every shaft or tunnel shall provide and maintain a ventilating system with a capacity of at least 75 cubic feet per man per minute or, if horses and mules are used, at least 175 cubic feet per horse or mule per minute. The ventilating system, immediately after blasting has occurred, shall be capable of removing 4,000 cubic feet per minute and entirely removing the contaminated air in 15 minutes.
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