PDFWAC 296-52-69080
Blast site storage.
(1) Location. Temporary storage for explosives at blast sites must be located away from:
(a) Inhabited buildings;
(b) Railways;
(c) Highways;
(d) Other magazines.
(2) Separation distance. A distance must be maintained between magazines and the blast site. This distance must be a minimum of:
(a) One hundred fifty feet when the quantity of explosives is greater than twenty-five pounds;
(b) Fifty feet when the quantity of explosives is twenty-five pounds or less.