Sec. 16. Where it is impractical to bury tanks, the chief inspector of the department of buildings and safety engineering may allow them to be installed inside of a building when completely incased in 12 inches of concrete and 6 inches of sand.
Mich. Comp. Laws § 125.566
Installation of inside tanks
1929, Act 319, Imd
Official source: Michigan Legislature. Reproduced from public-domain Michigan statutes; confirm against the official source for the current text. Not legal advice.