Current through Register Vol. 35, No. 6, March 26, 2024
Owners and operators of above ground storage tank systems
with underground pressurized piping installed or modified on, or after the
effective date of these regulations shall use interstitial monitoring as the
method of release detection for the piping. The interstitial monitoring method
shall follow the current edition of an industry standard or code of practice
developed by a nationally recognized association or independent testing
laboratory approved in advance by the department.
A. Owners and operators of AST systems shall:
(1) use automatic line leak detectors
(including mechanical or electronic detectors) that alert the operator to the
presence of a leak by restricting or shutting off the flow of regulated
substances through piping when a leak is detected at three gallons per hour at
10 pounds per square inch line pressure within one hour;
(2) perform an annual test of the operation
of the leak detector which includes a simulated leak, is conducted in
accordance with the manufacturer's testing protocol, and confirms the automatic
line leak detector detects a leak at three gallons per hour at 10 pounds per
square inch line pressure within one hour;
(3) use interstitial monitoring that complies
with all of the requirements in 20.5.111.1103 NMAC and all of the following:
(a) Sensors shall be installed in all
containment sumps associated with the piping, including under-dispenser
containment, transition sumps, and submersible turbine pump containment sumps
used to monitor the interstice;
(b)
Sensors shall:
(i) monitor the
interstice;
(ii) monitor all
containment sumps associated with the piping;
(iii) sound an alarm and automatically shut
off the submersible turbine pump when a regulated substance or water is
detected;
(iv) be positioned in the
lowest point of the containment sump; and
(v) be tested annually in accordance with
Subsection C of 20.5.111.1104 NMAC;
(c) Containment sumps used for interstitial
monitoring shall be tested every three years starting three years after the
effective date of these regulations. The testing of the containment sumps shall
comply with one of the following:
(i) the
testing procedures as described in 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
(ii) the
equipment manufacturer's published testing procedures.
B. Automatic line leak
detectors and sensors required in this section that either fail a test or are
found to be damaged shall be repaired or replaced, and a line tightness test
shall be conducted in accordance with Subparagraph (a) of Paragraph (3) of
Subsection A of 20.5.11.1105 NMAC once the repairs or replacements have been
completed;
C. Equipment and methods
used to monitor the piping shall be appropriate for the type and length of
piping.
D. Owners and operators
shall use one or more of the following to comply with the requirements of this
section:
(1)
Petroleum Equipment
Institute Publication RP100, "Recommended Practices for Installation of
Underground Liquid Storage Systems";
(2)
Petroleum Equipment Institute
RP200, "Recommended Practices for Installation of Aboveground Storage Systems
for Motor Vehicle Fueling";
(3)
American Petroleum Institute
Publication RP 1615, "Installation of Underground Hazardous Substances or
Petroleum Storage Systems";
(4)
American Petroleum Institute 570,
"Piping Inspection Code: In-Service Inspection, Repair, and Alteration of
Piping Systems"; and
(5)
American Society of Mechanical Engineering Standard B31.3, "Process
Piping".
E.
Owners and operators shall maintain all records of release detection and
testing in accordance with 20.5.111.1111 NMAC and provide to the department
reports for all release detector testing, line tightness testing, containment
sump testing, and sensor testing in accordance with 20.5.111.1112
NMAC.
