WAC 296-307-40017. Locations for anhydrous ammonia containers

(1) When selecting the location for a storage container, the employer must take into account the physiological effects of ammonia and adjacent fire hazards. Containers located indoors must be in areas especially approved for container storage. (2) Containers must be located at least fifty feet from a dug well or other sources of potable water supply, unless the container is a part of a water treatment installation. (3) Permanent storage containers must be located outside densely populated areas. (4) Containers must be located according to the following: Minimum distances (feet) from container to: Nominal capacity of container Line of adjoining property that may be built upon, highways & main line of railroad Place of public assembly Institution occupancy Over 500 to 2,000 25 150 250 Over 2,000 to 30,000 50 300 500 Over 30,000 to 100,000 50 450 750 Over 100,000 50 600 1,000 Minimum distances (feet) from container to: Nominal capacity of container Line of adjoining property that may be built upon, highways & main line of railroad Place of public assembly Institution occupancy Over 500 to 2,000 25 150 250 Over 2,000 to 30,000 50 300 500 Over 30,000 to 100,000 50 450 750 Over 100,000 50 600 1,000 (5) Storage areas must be kept free of readily ignitable materials such as waste, weeds and long dry grass.