Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 665 - Interim License Hazardous Waste Treatment, Storage And Disposal Facility Standards
Subchapter BB - Air Emission Standards for Equipment Leaks
Section NR 665.1056 - Standards: open-ended valves or lines
Universal Citation: WI Admin Code ยง NR 665.1056
Current through August 26, 2024
(1)
(a) Equip each open-ended valve or line with
a cap, blind flange, plug or a second valve.
(b) The cap, blind flange, plug or second
valve shall seal the open end at all times except during operations requiring
hazardous waste stream flow through the open-ended valve or line.
(2) Operate each open-ended valve or line equipped with a second valve in a manner such that the valve on the hazardous waste stream end is closed before the second valve is closed.
(3) 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 shall comply with sub. (1) at all other times.
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