Washington Flammable Liquids laws & safety compliance analysis
Washington Flammable Liquids: What you need to know
Washington has adopted rules for flammable liquids that mirror federal rules, and has added its own provisions for aboveground storage tanks, container storage, wharves, and processing plants (WAC 296-24-33001 to 296-24-33019).
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The Washington Department of Labor and Industries (DLI) administers and enforces workplace safety and health rules.
ABOVEGROUND TANK STORAGE
Safe distances for installation. With respect to property lines and public ways, including separation from important buildings on the same property, every aboveground tank for the storage of:
Flammable or combustible liquids, except those liquids with boil-over characteristics and unstable flammable or combustible liquids, operating at pressures exceeding 2.5 pounds per square inch gauge (psig) or equipped with emergency venting which will permit pressures to exceed 2.5 psig must be located according to Table H-6 of the rule
Flammable or combustible liquids with boil-over characteristics must be located according to Table H-7 of the rule
Unstable liquids must be located according to Table H-8 of the rule
Drainage. The following requirements are in addition to corresponding federal requirements:
The drainage system must include a slope of not less than 1 percent away from the tank toward the drainage system.
The drainage system, including automatic drainage pumps, must not discharge to adjoining property, natural watercourses, public sewers, or public drains, unless the discharge of flammable or combustible liquids would not constitute a hazard, or the system is so designed that it will not permit flammable or combustible liquids to be released.
Diked areas. When draining water from diked areas, drainage ...