Drilling shall not be started until all remaining butts of old holes are examined with a wooden stick for unexploded charges, and if any are found, they should be refired before other work proceeds.
Cal. Code Regs. Tit. 19, § 1569.3
Drilling shall not be started until all remaining butts of old holes are examined with a wooden stick for unexploded charges, and if any are found, they should be refired before other work proceeds.
Cal. Code Regs. Tit. 19, § 1569.3