10 CSR 26-2.044 - Methods of Release Detection for Piping
(1) Each
method of release detection for piping used to meet the requirements of release
detection for underground storage tanks (USTs) in
10 CSR
26-2.041 must be conducted in the following manner:
(A) Automatic Line Leak Detectors. Methods
which alert the operator to the presence of a leak by restricting or shutting
off the flow of regulated substances through piping or triggering an audible or
visual alarm may be used only if they detect leaks of three (3) gallons per
hour at ten (10) pounds per square-inch line pressure within one (1) hour and
are listed by the National Work Group on Leak Detection Evaluations. To obtain
copies of equipment listings, contact the National Work Group on Leak Detection
Evaluations, www.nwglde.org. A test
of the operation of the leak detector must be conducted at least annually. The
annual test must be conducted in accordance with the manufacturer's approved
testing procedures and simulate a leak of at least three (3) gallons per hour
at ten (10) pounds per square inch pressure, or equivalent, in the system under
normal operating conditions.
1. Line leak
detectors must monitor all pressurized piping, including pressurized piping
beyond the first or master dispenser but not including other piping above the
shear valve inside the dispenser or dispenser hoses to the
nozzle;
(B) Line
Tightness Testing. A periodic test of piping may be conducted only if it can
detect a one-tenth- (0.1-) gallon-per-hour leak rate at one and one-half (1.5)
times the operating pressure;
(C)
Applicable Tank Methods. Any of the methods in
10 CSR
26-2.043(1)(B) and (F)-(I) may be
used if they are designed to detect a release from any portion of the
underground piping that routinely contains regulated substances except-
1. Owners and operators of piping associated
with field-constructed tanks greater than fifty thousand (50,000) gallons or
airport hydrant fuel distribution system tanks may comply with
10 CSR
26-2.074 in lieu of the methods of piping leak
detection in this rule; and
(D) Emergency Generator Tanks. For a tank
that stores fuel solely for use by an emergency generator, or a tank that
stores fuel for an emergency generator and heating oil for consumptive use on
the premises where stored, interstitial line monitoring with sump sensors, an
alarm, and secondary containment may be used on pressurized lines in lieu of
the automatic line leak detector, required in
10 CSR
26-2.041 and subsection (1)(A) of this
rule.
Notes
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