f. Provide a dike around day tanks designed to contain the entire contents of the tank plus 2 in. freeboard. g. Limit the total capacity of day tanks or pipe headers within a fire compartment to a maximum of 660 gal. h. Ensure all day tank breather vents are piped to a safe location outside the building. i. Provide automatic sprinkler protection in the generator room designed to deliver a density of 0.25 gpm/ft over 4000 ft (286 ° F sprinklers) or 6000 ft (165 ° F sprinklers) plus 500 gpm for hose streams.
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