Current through Register Vol. 35, No. 6, March 26, 2024
A. Owners and operators shall use automatic
tank gauging systems that are third party certified for the size and capacity
of the AST. Only third-party certifications that have been reviewed and
approved by the national work group on leak detection evaluations (NWGLDE) for
AST use, as evidenced by their posting on the NWGLDE website, nwgle.org, will
be accepted.
B. Owners and
operators of ASTs may use automatic tank gauging as a method of release
detection, every 30 days, if the automatic tank gauging system:
(1) tests for the loss of product and can
detect a two-tenth gallon per hour leak rate from any portion of the tank that
routinely contains regulated substances; and
(2) can conduct inventory control or another
test of equivalent performance in accordance with all of the following:
(a) inventory volume measurements for
regulated substance inputs, withdrawals, and the amount still remaining in the
AST are recorded each operating day;
(b) the equipment used is capable of
measuring the level of regulated substance over the full range of the AST's
height to the nearest one-eighth of an inch;
(c) the regulated substance inputs are
reconciled with delivery receipts by measurement of the AST inventory volume
before and after delivery;
(d)
deliveries are made through a drop tube that extends to within one foot of the
AST bottom, unless the AST is bottom loaded;
(e) regulated substance dispensing is metered
and recorded within the state standards for meter calibration or an accuracy of
six cubic inches for every five gallons of regulated substance
withdrawn;
(f) the measurement of
any water level in the bottom of the AST is made to the nearest one-eighth of
an inch at least once a month; and
(g) practices described in the
American Petroleum Institute Publication RP1621, "Bulk Liquid Stock
Control at Retail Outlets" may be used, where applicable, as guidance
in meeting the requirements of this section.
C. Owners and operators shall ensure a test
of the proper operation of the automatic tank gauging system is performed at
least annually starting three years after the effective date of these
regulations and, at a minimum, as applicable to the facility, cover the
following components and criteria:
(1)
automatic tank gauge and other controllers: test alarm; verify system
programming and configuration; test battery backup;
(2) probes and sensors: inspect for residual
buildup; ensure floats move freely; ensure shaft is not damaged; ensure cables
are free of kinks and breaks; test alarm operability and communication with
controller;
(3) vacuum and pressure
pumps and gauges: ensure proper communication with sensors and controller;
and
(4) Inspections and testing
shall be conducted by a person who is certified as a technician by the
manufacturer of the automatic tank gauging system and meets the requirements
for qualified testers in 20.5.105 NMAC.
D. Owners and operator shall use one of the
following to comply with Paragraph C of this section:
(1)
Petroleum Equipment Institute
Publication RP 1200, "Recommended Practices for the Testing and Verification of
Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST
Facilities"; or
(2) The
manufacturer's testing or inspection instructions.
E. Owners and operators shall review the
monitoring reports on a monthly basis and notify the department in accordance
with 20.5.118 NMAC if there is a failed or inconclusive result.
F. Owners and operator shall produce a report
for all inspections and testing required in this section which includes the
results of the inspection or test and it shall be maintained and submitted in
accordance with 20.5.111.1111 NMAC and 20.5.111.1112 NMAC.
