It shall be unlawful for any person, firm or corporation to explode or cause to be exploded any dynamite, gunpowder or other explosive material for the purpose of breaking up earth, rock, concrete or other material by means of blasting; or drill a hole or make a crevice for the purpose of inserting any explosive material for the purpose of blasting, without first obtaining from the Department of Public Works a permit to do so.
(Amended by Ord. 150-61, App. 6/22/61)