Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 725 - INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
Subpart BB - AIR EMISSION STANDARDS FOR EQUIPMENT LEAKS
Section 725.954 - Standards: Pressure Relief Devices in Gas/Vapor Service
Universal Citation: 35 IL Admin Code ยง 725.954
Current through Register Vol. 48, No. 38, September 20, 2024
a) Except during pressure releases, each pressure relief device in gas/vapor service must be operated with no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background as measured by the method specified in Section 725.963(c).
b) Actions Following Pressure Release
1) After each pressure release, the pressure
relief device must be returned to a condition of no detectable emissions, as
indicated by an instrument reading of less than 500 ppm above background, as
soon as practicable, but no later than 5 calendar days after each pressure
release, except as provided in Section
725.959.
2) No later than five calendar days after the
pressure release, the pressure relief device must be monitored to confirm the
condition of no detectable emissions, as indicated by an instrument reading of
less than 500 ppm above background, as measured by the method specified in
Section
725.963(c).
c) Any pressure relief device that is equipped with a closed-vent system capable of capturing and transporting leakage from the pressure relief device to a control device as described in Section 725.960 is exempt from the requirements of subsections (a) and (b).
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