Section 170.545  USTs Inside or Under Buildings

a)         The floor level, under which a UST is located, shall be above-grade so as to prevent the flow of liquids or vapors into buildings, and the floors shall be of concrete or other fire resistant construction.

b)         No buildings, commencing April 1, 1995, shall be constructed over UST systems, in operation or out of operation (for any period of time); unless, they are exempted from removal pursuant to Section 170.670(a)(4) or (5).  Any such UST system over which a building is constructed shall not subsequently be eligible for an abandonment-in-place permit, as issued pursuant to Section 170.670(d).

c)         No USTs or dispensers, containing motor fuel, shall be installed inside buildings, except as authorized pursuant to Section 170.426(k).

d)         Underground product piping connecting USTs or dispensers, containing motor fuel, shall not be routed under buildings whenever feasible, except used oil UST piping with an inside fill may be permitted subject to approval by the Office of the State Fire Marshal on the applicable permit.

(Source:  Amended at 22 Ill. Reg. 21339, effective December 1, 1998)