§ 1926.905 Loading of explosives or blasting agents.
(a) Procedures that permit safe and efficient loading shall be established before loading is started.
(b) All drill holes shall be sufficiently large to admit freely the insertion of the cartridges of explosives.
(c) Tamping shall be done only with wood rods or plastic tamping poles without exposed metal parts, but nonsparking metal connectors may be used for jointed poles. Violent tamping shall be avoided. The primer shall never be tamped.
(d) No holes shall be loaded except those to be fired in the next round of blasting. After loading, all remaining explosives and detonators shall be immediately returned to an authorized magazine.
(e) Drilling shall not be started until all remaining butts of old holes are examined for unexploded charges, and if any are found, they shall be refired before work proceeds.