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 43.24 - Conveying of explosives

(a) Handling. Only experienced men who have been selected and regularly designated by the superintendent in charge and whose names have been posted in the field office or at the magazine shall handle, transport or prepare for use dynamite or other high explosives.

(b) Quantity; detonators. No greater quantity of explosives than that which is required for immediate use shall be taken into the shaft or tunnel, except for storage in an approved underground magazine. Explosives, when not in the original box, shall be conveyed in a suitable covered wooden box painted red. Detonators shall be conveyed in a separate wooden box painted red with one inch yellow stripe running horizontally entirely around the box. During transportation, explosives and detonators shall be kept at least 25 feet apart, unless transported in separate cars, in which case the distance between the explosives and detonators shall be at least six feet. Explosives and detonators shall not be taken down the shaft on the same cage at the same time. After blasting is completed all explosives and detonators shall be returned at once to the magazine, observing the same rules as when bringing them to the work. Between firing rounds, the explosives and detonators shall be deposited separately on wooden platforms at least 25 feet apart and at least 600 feet from the heading, on the side of the chamber opposite the electric light and power line, under the supervision of a competent man, or in the case of shafts, at least 50 feet from the outside of the opening.

(c) Tools. No tools or other articles shall be carried with the explosives or with the detonators.