Mont. Admin. r. 17.56.403 - REQUIREMENTS FOR HAZARDOUS SUBSTANCE UST SYSTEMS
(1)
For hazardous substance UST systems installed after October 13, 2018, owners and
operators shall provide containment that meets the following requirements and
monitor these systems pursuant to ARM
17.56.407(1)(g)
at least every 30 days:
(a) secondary containment
systems must be designed, constructed, and installed to:
(i) contain regulated substances leaked from the
primary containment until they are detected and removed;
(ii) prevent the release of regulated substances
to the environment at any time during the operational life of the UST system;
and
(iii) be checked for evidence of a
release at least every 30 days.
(b) double-walled tanks must be designed,
constructed, and installed to:
(i) contain a leak
from any portion of the inner tank within the outer wall; and
(ii) detect the failure of the inner
wall;
(c) external liners
(including vaults) must be designed, constructed, and installed to:
(i) contain 100 percent of the capacity of the
largest tank within its boundary;
(ii)
prevent the interference of precipitation or ground water intrusion with the ability
to contain or detect a release of regulated substances; and
(iii) surround the tank completely (i.e., it is
capable of preventing lateral as well as vertical migration of regulated
substances).
(d) underground
piping must be equipped with secondary containment that satisfies the requirements
of (1)(a) (e.g., trench liners, double-walled pipe). In addition, underground piping
that conveys regulated substances under pressure must be equipped with an automatic
line leak detector in accordance with ARM
17.56.408(1).
(2) For hazardous substance UST systems
installed on or before October 13, 2018, owners and operators may use:
(a) other methods of release detection if owners
and operators:
(i) demonstrate to the department
that an alternate method can detect a release of the stored substance as effectively
as any of the methods allowed in ARM
17.56.407(1)(b)through
(i) can detect a release of petroleum;
(ii) provide information to the department on
effective corrective action technologies, health risks, and chemical and physical
properties of the stored substance, and the characteristics of the UST site;
and
(iii) obtain approval from the
department to use the alternate release detection method before the installation and
operation of the new UST system; or
(b) the methods of release detection set forth in
40 CFR
265.193 (2011), Containment and Detection of
Releases.
(3) The department
adopts and incorporates by reference
40 CFR
265.193 (2011), which sets forth standards for
containment and detection of releases. A copy may be obtained from the
Superintendent of Documents, Government Printing Office, Washington, DC 20402, (202)
783-3238. Copies are also available for public inspection and copying at the
Department of Environmental Quality, 1520 E. 6th Ave., P.O. Box 200901, Helena, MT
59620-0901.
Notes
AUTH: 75-11-505, MCA; IMP: 75-11-505, MCA
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