WAC 296-52-70070
WAC 296-52-70070. Detonator day box
A detonator day box is a temporary storage facility for detonators in quantities of one thousand or less.
(1) Construction materials. Sides, bottoms, and covers must be:
(a) Constructed of number 12 gauge metal;
(b) Lined with a nonsparking material.
(2) Hinges and hasps must be attached by:
(a) Welding;
(b) Riveting; or
(c) Bolting nuts on the inside of the door.
(3) A single five tumbler lock must be used to lock the detonator day box.