TITLE 41: FIRE PROTECTION
CHAPTER I: OFFICE OF THE STATE FIRE MARSHAL
PART 170 STORAGE, TRANSPORTATION, SALE AND USE OF PETROLEUM AND OTHER REGULATED SUBSTANCES
SECTION 170.423 PRESSURE TESTING OF EXISTING TANKS OR LINES
CHAPTER I: OFFICE OF THE STATE FIRE MARSHAL
PART 170 STORAGE, TRANSPORTATION, SALE AND USE OF PETROLEUM AND OTHER REGULATED SUBSTANCES
SECTION 170.423 PRESSURE TESTING OF EXISTING TANKS OR LINES
Section 170.423 Pressure Testing of Existing Tanks or Lines
Pressure testing, with air or other gases, of underground storage tanks or piping containing, or which have contained, flammable or combustible liquids is prohibited. Except, approved tank or line tightness testing with inert gasses (nitrogen and helium) may be utilized. Preliminary air tests may be used for tanks cleaned and vapor freed for the purposes of testing coverplates or gaskets.
(Source: Amended at 27 Ill. Reg. 8164, effective May 1, 2003)