Section 296-52-70015. Igloos, army-type structures, tunnels, and dugouts.
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These storage facilities must:
• Be constructed of reinforced concrete, masonry, metal, or a combination of these materials
• Have an earth mound covering of at least twenty-four inches on the top, sides, and rear unless the magazine meets the requirements of WAC 296-52-70010 (4)(b), Building construction for roofs
• Have interior walls and floors covered with a nonsparking material
• Be constructed according to the requirements of WAC 296-52-70005, Type 1 magazines: Permanent storage facilities, through WAC 296-52-70060, Construction.