Current through Register Vol. 50, No. 9, September 20, 2024
A. When a UST
system is temporarily closed, owners and operators shall continue operation and
maintenance of corrosion protection in accordance with LAC 33:XI.303 and 503,
regardless of the amount of product stored in the UST system. The requirements
of this Section apply to all tanks, piping, metal flexible hoses, and
submersible turbine pumps.
1. Impressed
current systems on temporarily closed UST systems shall be operated
continuously to provide corrosion protection to the metal components of
external portions of the UST system that are in contact with soil, backfill, or
water, and shall be tested every three years in order to determine whether
cathodic protection is adequate, in accordance with LAC 33:XI.503.A.2.
a. If an impressed current system has been
inoperative for more than six months or if the impressed current system has not
been repaired within nine months after failing a corrosion protection test, the
UST owner shall either:
i. have the corrosion
protection system repaired, retested, and recommissioned under the supervision
of a corrosion expert within 90 days; or
ii. permanently close the UST system in
accordance with LAC 33:XI.905 and 907.
2. Impressed current system rectifiers on
temporarily closed UST systems shall be checked every 60 days to ensure that
the equipment is operating properly, in accordance with LAC
33:XI.503.A.3.
3. Galvanic systems
(e.g., anodes) on temporarily closed UST systems shall be tested every three
years, in accordance with LAC 33:XI.503.A.2.
a. If the galvanic system is not tested
within one year of the test due date, or if a galvanic system is not repaired
within one year of failing a corrosion protection test, the UST system shall be
permanently closed in accordance with LAC 33:XI.905 and 907.
4. The internal liners of
internally lined underground storage tanks that are in temporary closure shall
be inspected within 10 years after lining, and every five years thereafter, in
accordance with LAC 33:XI.303.E.3.a.
a. If
the internal liner is no longer performing in accordance with the original
design specifications and cannot be repaired in accordance with a code of
practice developed by a nationally recognized organization or independent
testing laboratory, or if the internal liner is not inspected within one year
of the inspection due date, then the lined tank shall be permanently closed in
accordance with LAC 33:XI.905 and 907.
5. Records of corrosion protection operation
and maintenance shall be maintained in accordance with LAC 33:XI.503.B and
509.B.2.
B. When a UST
system is temporarily closed, owners and operators shall maintain release
detection in accordance with LAC 33:XI.701-705 and LAC 33:XI.Chapter 8. If a
release is suspected or confirmed, the UST owner or operator shall comply with
LAC 33:XI.707-715. Release detection and the release detection operation and
maintenance testing and inspections listed in LAC 33:XI.511, 513, and 703.A.2.d
are not required as long as the UST system is empty. A UST system is empty when
all materials have been removed using commonly employed practices so that no
more than 2.5 centimeters (1 inch) of product or 0.3 percent by weight of the
total capacity of the UST system, whichever is less, remains in the UST system.
In addition, spill and overfill operation and maintenance testing and
inspections listed in LAC 33:XI.511 is not required.
C. When a UST system is temporarily closed
for three months or more, owners and operators shall also comply with the
following requirements:
1. leave vent lines
open and functioning;
2. cap and
secure all other lines, pumps, manways, and ancillary equipment; and
3. submit a completed copy of the UST-REG
form to the department, indicating the date that the UST system was temporarily
closed.
D. When a UST
system is temporarily closed for more than six months, owners and operators
shall permanently close the UST system if it does not meet either the
performance standards in LAC 33:XI.303.B, C, or D for new UST systems or the
upgrading requirements in LAC 33:XI.303.E.3-7, except that the spill and
overfill equipment requirements do not have to be met.
E. When all of the UST systems located in the
same tank hold at a facility are temporarily closed for more than 24 months,
owners and operators shall complete a site assessment in accordance with the
guidelines established by the department and LAC 33:XI.907. The results of the
assessment and documentation of compliance with the temporary closure
requirements in Subsection A of this Section shall be submitted in duplicate to
the Office of Environmental Assessment within 60 days following the end of the
24-month temporary closure period.
1. The
department may waive the site assessment requirement if the UST system is
placed into service after receiving notification from the department to conduct
the site assessment if the UST system passes tank and line tightness
testing.
2. The 24 month site
assessment is not required if a temporarily closed UST system contains product
and release detection, in accordance with LAC 33:XI.701-705 and LAC
33:XI.Chapter 8, is conducted on the tank during the entire period that the UST
system is temporarily closed. If release detection ceases, the 24-month site
assessment shall be conducted within two years of cessation of release
detection.
3. The department may
grant a two year extension to the temporary closure site assessment requirement
upon receiving a written request from the UST owner or operator. The written
request shall provide justification for the extension and documentation that
all corrosion protection equipment is operated and maintained in accordance
with Subsection A of this Section. If the UST system is returned to service
prior to the end of the two year extension period, a 24-month temporary closure
site assessment is not required.
4.
Upon permanent closure of a UST system, the 24-month temporary closure site
assessment may be used to satisfy the UST closure sampling requirements
specified in LAC 33:XI.907 at the discretion of the department, provided that
the UST system remained empty of regulated substances from the time of the
temporary closure site assessment until the time of permanent
closure.
F. A tank
tightness test conducted in accordance with LAC 33:XI.701.A.3, a line tightness
test conducted in accordance with LAC 33:XI.701.B.2, and a line leak detector
test conducted in accordance with LAC 33:XI.701.B.1 shall be conducted within
five days after a UST system that has been temporarily closed for three months
or more is brought back into service.
G. Within 30 days after a UST system is
placed back into service, an updated UST-REG form shall be submitted to the
department identifying the date that the UST system was placed back into
service.
H. Release detection
operation and maintenance testing and inspections listed in LAC 33:XI.511, 513,
and 703.A.2.d are due within 30 days of placing the UST system back into
service, or within the required timeframe of the last test conducted as
required by LAC 33:XI.511, 513, and 701.A.2.d, whichever is later.
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
30:2001 et
seq.
