Current through Register Vol. 6, March 22, 2024
(1) Owners and operators of new and existing
UST systems shall provide a method, or combination of methods, of release
detection that:
(a) can detect a release from
any portion of the tank and the connected underground piping that routinely
contains product;
(b) is installed
and calibrated, in accordance with the manufacturer's instructions;
(c) meets the performance requirements in ARM
17.56.407
or
17.56.408,
with any performance claims and their manner of determination described in
writing by the equipment manufacturer or installer. In addition, methods listed
in ARM
17.56.407(1)(b)
through (d), (h) and (i); in ARM
17.56.408(1)(a)
and (b); or in [17.56.1601 ] must be capable
of detecting a leak rate or quantity specified for that method in ARM
17.56.407(1)(b)
through (d), (h) and (i); in ARM
17.56.408(1)(a)
and (b); or in [17.56.1601] with a
probability of detection of 0.95 and a probability of false alarm of 0.05;
and
(d) beginning on October 13,
2021, the release detection method or a combination of methods must be operated
and maintained, and electronic and mechanical components must be tested for
proper operation, in accordance with one of the following:
(i) manufacturer's instructions;
(ii) a code of practice developed by a
nationally recognized association or an independent testing
laboratory;
(iii) the Petroleum
Equipment Institute Publication RP1200 "Recommended Practices for the Testing
and Verification of Spill, Overfill, Leak Detection and Secondary Containment
Equipment at UST Facilities;" or
(iv) requirements determined by the
department to be no less protective of human health and the environment than
the two options listed in (d)(i) and (d)(ii).
(2) A test of the proper operation of leak
detection equipment must be performed at least annually and, at a minimum, as
applicable to the facility, cover the following components and criteria:
(a) automatic tank gauge and other
controllers:
(i) test alarm;
(ii) verify system configuration;
and
(iii) test battery
backup.
(b) probes and
sensors:
(i) inspect for residual
buildup;
(ii) ensure floats move
freely;
(iii) ensure shaft is not
damaged;
(iv) ensure cables are
free of kinks and breaks; and
(v)
test alarm operability and communication with controller.
(c) automatic line leak detector:
(i) test operation to meet applicable
criteria in ARM
17.56.408(1)(a)
by simulating a leak.
(d) vacuum pumps and pressure gauges:
(i) ensure proper communication with sensors
and controller.
(e)
hand-held electronic sampling equipment associated with groundwater and vapor
monitoring:
(i) ensure proper
operation.
(3) When a release detection method operated
in accordance with the performance standards in ARM
17.56.407
and
17.56.408
indicates a release may have occurred, owners and operators shall notify the
department in accordance with subchapter 5.
(4) Any UST system that cannot apply a method
of release detection that complies with the requirements of this subchapter
must complete the closure procedures in ARM Title 17, chapter 56, subchapter
7.
