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
WORK IN COMPRESSED AIR-CAISSONS AND OTHER PLACES
Section 43.81 - Compressor plants

(a) A good and sufficient air plant for the compression of air shall be provided to meet ordinary conditions and emergencies, and to provide for repairs at all times. The plant shall be capable of furnishing to each working chamber a sufficient air supply for all pressures to enable work to be done as nearly as possible in the dry.

(b) Duplicate air feed pipes shall be installed on all caissons.

(c) Every effort shall be made by the best available means to keep the temperature in the working chamber below 100°F.