§ 211.155. Preblast measures.
Prior to detonating a blast, the blaster-in-charge shall:
(1) Ensure that all excess explosives have been removed from the blast area and are located in a safe area.
(2) Inspect the blast site to ensure that connections are proper and adequate.
(3) Ensure that the blast area is cleared and safeguarded.
(4) In addition to the warning signal, notify all persons who may be in danger.
(5) Ensure that the necessary precautions are in place to protect the public on public roads.
(6) At least 1 minute but no more than 2 minutes prior to detonation, sound a warning signal of three blasts, each lasting approximately 5 seconds. The warning signal shall be of sufficient power to be heard 1,000 feet (304.80 meters) from the blast site.
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