Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 721 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE
Subpart BB - AIR EMISSION STANDARDS FOR EQUIPMENT LEAKS
Section 721.956 - Standards: Open-Ended Valves or Lines
Universal Citation: 35 IL Admin Code ยง 721.956
Current through Register Vol. 48, No. 38, September 20, 2024
a) Equipment.
1) Each open-ended valve or line must be
equipped with a cap, blind flange, plug, or a second valve.
2) The cap, blind flange, plug, or second
valve must seal the open end at all times except during operations requiring
hazardous secondary material stream flow through the open-ended valve or
line.
b) Each open-ended valve or line equipped with a second valve must be operated in a manner such that the valve on the hazardous secondary material stream end is closed before the second valve is closed.
c) When a double block and bleed system is being used, the bleed valve or line may remain open during operations that require venting the line between the block valves but must comply with subsection (a) at all other times.
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