Current through September 21, 2024
(a)
Release Detection. Owners and/or operators of UST systems
shall provide a method, or combination of methods, of release detection that:
(i) Can detect a release from any portion of
the tank and the connected piping that routinely contains a regulated
substance;
(ii) Is installed,
calibrated, operated, and maintained in accordance with the manufacturer's
instructions, including routine maintenance and service checks showing that the
leak detection equipment is fully operational and in proper calibration;
and
(iii) Meets the performance
requirements in Sections 15, 16, or 17, with any performance claims and their
manner of determination described in writing by the equipment manufacturer or
installer. Methods used shall be capable of detecting the leak rate or quantity
specified for that method in Sections 15, 16, or 17 with a probability of
detection of 0.95 and a probability of false alarm of 0.05.
(b)
Release Reporting. When
a release detection method operated in accordance with the performance
standards in Sections 15, 16, or 17 indicates a release may have occurred,
owners and/or operators shall notify the department in accordance with Part
E.
(c)
Timing.
Owners and/or operators of new or existing UST systems shall comply with the
release detection requirements of this part immediately upon
installation.
(d)
USTs
without leak detection. Any owner and/or operator of an UST system
that cannot apply a method of release detection that complies with the
requirements of this part shall complete the closure procedures in Part
G.
(e)
Petroleum USTs less
than 1000 gallons. Owners and/or operators of USTs with a capacity of
one thousand (1,000) gallons or less may use manual tank gauging as the sole
leak detection method for the tank. Manual tank gauging shall be conducted
weekly in accordance with Section 15(a).
(f)
Petroleum USTs with a throughput of less
than 15,000 gallons per month. Not withstanding any other provision of
this chapter, owners and/or operators of USTs with a throughput of less than
15,000 gallons per month may use inventory control as a monthly monitoring
technique provided that:
(i) the inventory
control balances within 150 gallons per month. In the event that a single month
fails to balance within 150 gallons, the operator shall immediately submit that
month to an outside vendor for Statistical Inventory Reconciliation;
(ii) the USTs are secured against theft in
such a way that any theft is readily obvious; and
(iii) all of the requirements listed under
Section 16(a) are met.
(g)
Piping. Connected piping that
routinely contains regulated substances shall be monitored for releases in a
manner that meets one (1) of the following requirements:
(i) Pressurized piping systems shall:
(A) Be monitored in accordance with Section
14(g)(i)(B) below. Whenever pressure systems have multiple dispensers hooked up
to dispense product through a single meter, the pressurized piping between the
first dispenser and the slave dispenser must also be monitored and tested;
and
(B) Be equipped with an
automatic line leak detector in accordance with the following: Methods which
alert the owner and/or 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. An annual test of the operation of the leak detector shall be
conducted. Manufacturers are required to recommend procedures to be used for
testing their own equipment, but all automatic line leak detectors shall be
tested annually. No manufacturer shall recommend that its equipment not be
tested nor interfere with the testing of its equipment in any way. In addition
all underground pressurized piping shall:
(1)
have an annual line tightness test. A periodic test of piping may be conducted
only if it can detect a 0.1 gallon per hour leak rate at one and one-half (1
1/2) times the operating pressure. Tests performed by automatic systems are
specifically allowed in meeting this requirement; or
(2) be tested using any of the methods listed
in Section 16(d), (e), (f), (g), (h) or (j). Methods not specifically named in
these regulations shall be approved prior to use by the department, pursuant to
Section 33, and that approval must state that the method will detect a leak in
lines.
(ii) A
U.S. Suction system is a system of underground piping which conveys a regulated
substance using suction and which has more than one check valve in the line.
All U.S. Suction systems shall:
(A) have a
line tightness test performed once every three (3) years. A periodic test of
piping may be conducted only if it can detect a 0.1 gallon per hour leak rate
at one and one-half (1 1/2) times the operating pressure; or
(B) be tested using any of the methods listed
in Section 16(d), (e), (f), (g) or (j). Methods not specifically named in these
regulations may be used if they are approved prior to use by the department,
pursuant to Section 33 and that approval must state that the method will detect
a leak in the lines.
(iii) Underground piping that conveys
regulated substances using an exempt suction system is not required to have a
release detection system. An exempt suction system is one that is designed and
constructed to meet the following requirements:
(A) The below-grade piping operates at less
than atmospheric pressure;
(B) The
below-grade piping is sloped so that the contents of the pipe will drain back
into the storage tank if the suction is released;
(C) Only one check valve is included in each
suction line;
(D) The check valve is
located directly below and as close as practical to the suction pump;
and
(E) A method shall be provided
that allows compliance with this section to be readily determined.
(h)
New UST installations and repairs. Regardless of any other
section in this chapter, after the effective date of this chapter, all new and
replacement installations and repairs of existing piping shall meet the
following secondary containment criteria:
(i)
New or replacement tanks shall be provided with full secondary containment in
the form of:
(a) Double Walled tanks;
or
(b) Single wall tanks with a
polyethylene tank jacket.
(ii) New or replacement connected piping
shall be provided with full secondary containment in the form of:
(a) Double wall lines; or
(b) Single wall lines with secondary
containment piping. And
(iii) All dispensers must be equipped with
full secondary containment in the form of dispenser pans.
(iv) All secondary containment systems shall
be monitored in accordance with Section 16(f).
