SPECIAL PRECAUTIONS: AMMONIUM NITRATES
§ 5.191. Distance limitations.
(a) Where both finished explosives and raw ammonium nitrate are handled or stored within the distance limitations for intermagazine storage, as prescribed in § 5.122(c) (relating to tables of quantity and distance), the weight of raw ammonium nitrate shall be included in the calculation of the weight of total explosives for determining the proper spacing from highways, public buildings, and railroads, in accordance with § 5.122(a).
(b) Plants used for mixing ammonium nitrate with fuel shall be located in accordance with the provisions of § 5.122. The mixing plant shall be separated from raw nitrate storage areas by at least the distance provided in § 5.122(c); and from the finished storage areas by at least the distance provided in § 5.62 (relating to location). Any raw ammonium nitrate stored closer to finished explosives than the distance provided by § 5.122(c) shall be considered as explosive in calculating the quantity of explosives involved.
(c) Stored ammonium nitrate shall be isolated from readily combustible fuels.
(d) The mixing plant shall provide physically separated areas for the storage of raw material and the finished product, as well as for mixing and packaging operations.
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