Current through September 17, 2024
The requirements of 40 CFR 280.20(a)-(d) and
(f) as they existed on July 15, 2015 are
adopted and incorporated by reference.
001.01 All underground storage tanks, or
piping connected to any such tanks that are installed or replaced after
September 19, 2007 will be secondarily contained and the interstice will be
monitored for leaks. This provision will include the installation of tank sumps
and under-dispenser containment sumps.
001.01A. Tank and piping secondary
containment will be compatible with the substance stored in the tank
system.
001.01B. Interstitial
monitoring will be provided for all new tanks and piping installed after
September 19, 2007.
001.01C.
Secondary containment systems must be designed, constructed and installed to:
001.01C1. Contain regulated substances
released from the tank system until they are detected and removed;
001.01C2. Prevent the release of regulated
substances to the environment at any time during the operational life of the
UST system; and
001.01C3. Be
checked for evidence of a release at least every 30 days.
001.01D. Double-walled tanks must be
designed, constructed, and installed to:
001.01D1. Contain a release from any portion
of the inner tank within the outer wall; and
001.01D2. Detect the failure of the inner
wall.
001.01E. External
liners (including vaults) must be designed, constructed, and installed to:
001.01E1. Contain 100 percent of the capacity
of the largest tank within its boundary;
001.01E2. Prevent the interference of
precipitation or ground-water intrusion with the ability to contain or detect a
release of regulated substances; and
001.01E3. Surround the tank completely (i.e.,
it is capable of preventing lateral as well as vertical migration of regulated
substances).
001.01F.
Underground piping, including "safe suction" piping, must be equipped with
secondary containment that satisfies the requirements of 001.01C above (e.g.,
trench liners). In addition, underground piping that conveys regulated
substances under pressure must be equipped with an automatic line leak detector
in accordance with 004 of Chapter 7.
001.02 All new tanks, their welds, seams, and
connecting fittings, must be tested prior to installation for tightness using
standard engineering practices.
001.02A.
Pre-installation tank testing will be in accordance with Petroleum Equipment
Institute/RP 100 or the tank manufacturer's installation
instructions.
001.02B. All new
single-wall tanks installed in excavation liners will be tested with 3 to 5
psig of air pressure. Gauges must have a scale that will permit detection of
small changes in pressure. A gauge with a maximum limit of 10 to 15 psig is
required. The test will include the application of a soap solution over the
entire surface of the tank and its fittings, followed by careful inspection for
bubbles. The soap solution should be applied uniformly with a mop or
spray.
001.02C. All new
double-walled tanks will be tested with 3 to 5 psig of air pressure, unless
prohibited by manufacturer's instructions. Gauges must have a scale that will
permit a detection of small changes in pressure. A gauge with a maximum limit
of 10 to 15 psig is required. The test will include pressurizing the inner tank
from 3 to 5 psig then sealing the inner tank disconnecting the external air
supply and monitoring the pressure for one hour. The interstice will be tested
using the air from the inner tank. A second gauge, as described above, must be
used in monitoring the interstice. The entire surface of the tank will be
soaped followed by a careful inspection for bubbles. The soap solution should
be applied uniformly with a mop or spray.
001.02D. All defects or scratches in the
tanks coating will be repaired in a manner approved by the
manufacturer.
001.03
Precaution will be taken to prevent tank floating during the installation
process. Fuel will not be used as a ballast.
001.04 Backfill material will be pea gravel,
crushed rock, or clean sand free of cinders, stones, and any other foreign
material. Tank installation instructions may require specific aggregate sized
crushed rock or gravel. Instructions may also specify mechanical compaction or
layered placement of bedding and backfill. The installation instructions
provided by the manufacturer must always be consulted prior to installation.
001.04A. All product lines will slope a
minimum of 1/8 of inch per foot towards the tank and be installed in a single
trench between the tank area and pump island. All vent lines will slope a
minimum of 1/8 inch per foot towards the tank and be installed in a single
trench.
001.04B. All unions and
fittings will be a minimum of 250 pounds. All joints, damaged pipe coating or
unprotected threads will be wrapped or coated with a material approved by the
manufacturer.
001.04C. All new
product lines will be pneumatically tested for tightness with air pressure. All
joints, seams and connections will be soaped to detect leakage. For
non-metallic piping, the joints and connections will be soaped. The test will
be maintained for a minimum of 1 hour, and all soaped areas will be visually
inspected for bubbles or any other indication of a leak. Piping will be tested
at not less than 50 psig at the highest point of the system. Any loss of
pressure or appearance of bubbles will constitute failure of the
test.
001.04D. Vent and fill lines
must be coated but need not be cathodically protected. Metallic product lines
must be cathodically protected.
001.05 Underground storage tank systems
storing hazardous substances will meet the requirements of this Chapter
4.
001.06 All used steel and
fiberglass reinforced plastic tanks will require the manufacturer's
certification for re-installation. Installations will follow all procedures of
this chapter.
001.07 Owners and
Operators must have the following records submitted to the State Fire Marshal's
Office pertaining to all new tanks and piping installations prior to placing
UST system into operation.
001.07A. Four Page
Notification Form (Provided by Fire Marshal Office);
001.07B. As Built Drawings;
001.07C. Post Installation tank and piping
tests; and
001.07D. Manufacturers
install checklist.
