Washdown facilities shall be provided. An automatic water-deluge system with adequate capacity is required to protect mixers and the finished-explosive storage area in the plant. Floors shall be constructed so as to eliminate open floor drains into which molten materials could flow and be confined in case of fire. The floors and equipment of the mixing and packaging room shall be washed down frequently to prevent accumulation of oxidizers or fuels and other sensitizers. The entire mixing and packaging plant shall be washed down periodically to prevent excessive accumulation of dust.200.26Z-21
Cal. Code Regs. Tit. 19, § 1572.4