If a LP-Gas tank is installed underground or mounded in earth, what rules/applications apply?
A LP-Gas tank, whether installed above or below ground, is considered a LP-Gas tank by the Office of the State Fire Marshal. The OSFM retains jurisdiction for the inspection of these tanks and a regular LP-Gas tank installation application should be submitted. (NFPA Standard #58 does contain special rules when a LP-Gas tank is installed underground or under a mound of earth). An underground LP-Gas tank is NOT considered an underground petroleum storage tank by the OSFM and the rules for underground storage of regulated substances found in 41 Ill. Adm. Code 170 do NOT apply.