Ill. Admin. Code tit. 35, § 724.954 - Standards: Pressure Relief Devices in Gas/Vapor Service
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
724.963(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 five calendar days after each pressure
release, except as provided in Section
724.959.
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
724.963(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
724.960
is exempt from the requirements of subsections (a) and (b).
Notes
Amended at 27 Ill. Reg. 3725, effective February 14, 2003
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