Illinois Administrative Code
Title 41 - FIRE PROTECTION
Part 175 - TECHNICAL REQUIREMENTS FOR UNDERGROUND STORAGE TANKS AND THE STORAGE, TRANSPORTATION, SALE AND USE OF PETROLEUM AND OTHER REGULATED SUBSTANCES
Subpart D - DESIGN, INSTALLATION AND CONSTRUCTION REQUIREMENTS
Section 175.435 - Pressure Testing of Tanks or Lines

Universal Citation: 41 IL Admin Code § 175.435

Current through Register Vol. 48, No. 52, December 27, 2024

a) The use of air or non-inert gases to test underground storage tanks or piping containing, or that have contained, flammable or combustible liquids is prohibited.

b) Approved tank or line precision testing with inert gases (nitrogen and helium) may be utilized.

c) Prior to the precision test, preliminary air tests may be used for tanks cleaned and vapor freed for the purposes of testing manway coverplates or gaskets.

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