| (a) New underground storage tank (UST) systems.
(1) Requirements for all new UST systems. All new UST systems
installed on or after the effective date of this subchapter, which contain,
have contained, or will contain any regulated substances shall be in compliance
with the following requirements from the time of installation through the
operational life of the system.
(A) Such systems shall be designed, constructed, and installed
in accordance with the provisions of §334.45 of this title (relating
to Technical Standards for New UST Systems) and §334.46 of this title
(relating to Installation Standards for New UST Systems).
(B) Such systems shall be properly protected from corrosion
or equipped with appropriate corrosion protection equipment, as provided in §334.49
of this title (relating to Corrosion Protection).
(C) Such systems shall be monitored for releases as provided
in §334.50 of this title (relating to Release Detection).
(D) The tanks in such systems shall be protected from spills
and overfills, as provided in §334.51 of this title (relating to Spill
and Overfill Prevention and Control).
(2) Additional requirements for new hazardous substance UST
systems. In addition to the requirements applicable to all new UST systems
in paragraph (1) of this subsection, all new hazardous substance UST systems
installed on or after the effective date of this subchapter shall also be
in compliance with the following requirements from the time of installation
through the entire operational life of the system.
(A) Such systems shall be properly constructed or equipped
with a secondary containment system which shall be designed, constructed,
and installed in accordance with the provisions of §334.45(d) of this
title and §334.46(f) of this title.
(B) Such systems shall be properly constructed or equipped
with a release detection system capable of monitoring either the interstitial
spaces between the primary and secondary walls of any double-wall UST components,
or the spaces between the primary UST component walls and all secondary containment
barriers, as applicable, in accordance with the provisions in §334.50(c)
of this title.
(b) Existing UST systems.
(1) Requirements for all existing UST systems. All existing
UST systems (i.e., UST systems for which installation has commenced or has
been completed on or prior to December 22, 1988) which contain or have contained
any regulated substances shall meet the applicable requirements of §334.47
of this title (relating to Technical Standards for Existing UST Systems) in
accordance with the following schedule.
(A) Tank integrity assessment and cathodic protection. No later
than December 22, 1998, all existing UST systems shall be brought into compliance
with the applicable tank integrity assessment and cathodic protection requirements
of §334.47(b)(1) of this title.
(B) Spill and overfill prevention. No later than December 22,
1994, all tanks in an existing UST system shall be brought into compliance
with the applicable spill and overfill prevention equipment requirements of §334.51(b)
of this title.
(C) Release detection for existing UST system piping.
(i) Release detection for pressurized piping. No later than
December 22, 1990, all piping in an existing UST system that routinely conveys
regulated substances under pressure (i.e., which operates at greater than
atmospheric pressure) shall be brought into compliance with the pressurized
piping release detection requirements in §334.50(b)(2)(A) of this title.
(ii) Release detection for suction piping and gravity-flow
piping. All piping in an existing UST system that routinely conveys regulated
substances either by gravity flow or under suction (i.e., which operates at
less than atmospheric pressure) shall be brought into compliance with the
suction and gravity-flow piping release detection requirements in §334.50(b)(2)(B)
of this title no later than the date on which release detection is required
for the tank to which such piping is connected, as prescribed in subparagraph
(D) of this paragraph.
(D) Release detection for existing tanks.
(i) Except as provided in clause (ii) of this subparagraph,
all tanks in an existing UST system shall be brought into compliance with
the tank release detection requirements in §334.50(b)(1) of this title
no later than the date specified in the following subclauses for the time
of installation applicable to such tanks:
(I) December 22, 1989, for tanks where the installation dates
are undetermined or unknown;
(II) December 22, 1989, for tanks installed during 1964 or
prior years;
(III) December 22, 1990, for tanks installed during the years
1965-1969, inclusive;
(IV) December 22, 1991, for tanks installed during the years
1970-1974, inclusive;
(V) December 22, 1992, for tanks installed during the years
1975-1979, inclusive;
(VI) December 22, 1993, for tanks installed during the years
1980-1987, inclusive; and
(VII) December 22, 1993, for tanks installed between January
1, 1988, and December 22, 1988, inclusive.
(ii) For emergency generator tanks only, the compliance dates
prescribed in clause (i)(I)-(V) of this subparagraph shall be extended by
one year; however, no compliance date shall be extended later than December
22, 1993.
(2) Additional requirements for existing hazardous substance
UST systems. In addition to the requirements applicable to all existing UST
systems in paragraph (1) of this subsection, all existing hazardous substance
UST systems shall also be brought into compliance with additional secondary
containment and release detection standards in accordance with the following
schedule.
(A) No later than December 22, 1998, all existing hazardous
substance UST systems shall be equipped with a secondary containment system
meeting the design, construction, and installation requirements in §334.45(d)
of this title and of §334.46(f) of this title.
(B) No later than December 22, 1998, all existing hazardous
substance UST systems shall be equipped with a release detection system capable
of monitoring either the interstitial spaces between the primary and secondary
walls of any double-walled UST components, or the spaces between the primary
UST component walls and any secondary containment barriers, as applicable,
in accordance with the provisions in §334.50(c) of this title.
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