Current through Register Vol. 35, No. 6, March 26, 2024
A. Owners and operators of ASTs may use
visual inspection as a method of release detection if:
(1) all portions of the ASTs, including the
AST bottoms, are completely visible, readily accessible and are inspected
monthly;
(2) owners and operators
maintain a written log of the visual inspections for each AST conducted monthly
to include the following:
(a) the date and
time the inspection was conducted;
(b) name and signature of the person who
conducted the inspection;
(c)
comments on the condition of each AST;
(d) the results of each inspection;
and
(e) the volume of water found
in the AST and if the water has been removed from the tank; and
(3) owners and operators keep
visual inspection logs available at the facility.
B. Owners and operators of double-walled and
double-bottomed AST systems shall include inspection of the interstice in the
monthly visual inspection which shall be recorded in the log required in
Paragraph (2) of Subsection A. Owners and operators of AST systems that use
interstitial monitoring with an electronic liquid sensor as their monthly
method of release detection in accordance with 20.5.111.1103 NMAC do not have
to meet the requirements of this subsection. The monthly inspection of the
interstice shall use one of the following methods:
(1) manually stick or gauge the monitoring
ports of the tank by use of a tank gauging stick that is calibrated to the
nearest one-eighth of an inch;
(2)
where the interstice is equipped with a mechanical float device that will
visually signal when a liquid is present in the interstice, inspect the
device;
(3) for double-bottomed
vertical ASTs with drain valves for the interstice, check for the accumulation
of regulated substances or water;
(4) inspect the interstice per manufacturer's
instructions; or
(5) visually
inspect vertical ASTs inside secondary containment that meet the requirements
of 20.5.109 NMAC where the secondary containment has been constructed so the
space between the tank bottom and the concrete floor can be monitored or
visually inspected.
