Ill. Admin. Code tit. 35, § 724.957 - Standards: Valves in Gas/Vapor or Light Liquid Service
a) Each valve in gas-vapor or light liquid
service must be monitored monthly to detect leaks by the methods specified in
Section
724.963(b)
and must comply with subsections (b) through (e), except as provided in
subsections (f), (g), and (h), and in Sections
724.961
and
724.962.
b) If an instrument reading of 10,000 ppm or
greater is measured, a leak is detected.
c) Monitoring Frequency
1) Any valve for which a leak is not detected
for two successive months must be monitored the first month of every succeeding
quarter, beginning with the next quarter, until a leak is detected.
2) If a leak is detected, the valve must be
monitored monthly until a leak is not detected for two successive
months.
d) Leak Repair
1) When a leak is detected, it must be
repaired as soon as practicable, but no later than 15 calendar days after the
leak is detected, except as provided in Section
724.959.
2) A first attempt at repair must be made no
later than five calendar days after each leak is detected.
e) First attempts at repair include, but are
not limited to the following best practices where practicable:
1) Tightening bonnet bolts.
2) Replacing bonnet bolts.
3) Tightening packing gland nuts.
4) Injecting lubricant into lubricated
packing.
f) Any valve
that is designated, as described in Section
724.964(g)(2),
for no detectable emissions, as indicated by an instrument reading of less than
500 ppm above background, is exempt from the requirements of subsection (a) if
the following is true of the valve:
1) It has
no external actuating mechanism in contact with the hazardous
wastestream.
2) It is operated with
emissions less than 500 ppm above background as determined by the method
specified in Section
724.963(c).
3) It is tested for compliance with
subsection (f)(2) initially upon designation, annually, and at other times as
specified in the RCRA permit.
g) Any valve that is designated, as described
in Section
724.964(h)(1),
as an unsafe-to-monitor valve is exempt from the requirements of subsection
(a), if the following occurs:
1) The owner or
operator of the valve determines that the valve is unsafe to monitor because
monitoring personnel would be exposed to an immediate danger as a consequence
of complying with subsection (a).
2) The owner or operator of the valve adheres
to a written plan that requires monitoring of the valve as frequently as
practicable during safe-to-monitor times.
h) Any valve that is designated, as described
in Section
724.964(h)(2),
as a difficult-to-monitor valve is exempt from the requirements of subsection
(a), if the following occurs:
1) The owner or
operator of the valve determines that the valve cannot be monitored without
elevating the monitoring personnel more than two meters above a support
surface;
2) The hazardous waste
management unit within which the valve is located was in operation before June
21, 1990; and
3) The owner or
operator of the valve follows a written plan that requires monitoring of the
valve at least once per calendar year.
Notes
Amended at 27 Ill. Reg. 3725, effective February 14, 2003
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