a) Owners or operators of new tank systems or
components must obtain and submit to the Agency, at time of submittal of Part B
information, a written assessment, reviewed and certified by a qualified
Professional Engineer, in accordance with 35 Ill. Adm. Code
702.126(d),
attesting that the tank system has sufficient structural integrity and is
acceptable for the storing and treating of hazardous waste. The assessment must
show that the foundation, structural support, seams, connections, and pressure
controls (if applicable) are adequately designed and that the tank system has
sufficient structural strength, compatibility with the wastes to be stored or
treated and corrosion protection to ensure that it will not collapse, rupture,
or fail. This assessment, which will be used by the Agency to review and
approve or disapprove the acceptability of the tank system design, must
include, at a minimum, the following information:
1) Design standards according to which tanks
or the ancillary equipment are constructed;
2) Hazardous characteristics of the wastes to
be handled;
3) For new tank systems
or components in which the external shell of a metal tank or any external metal
component of the tank system will be in contact with the soil or with water, a
determination by a corrosion expert of the following:
A) Factors affecting the potential for
corrosion, including but not limited to the following:
i) Soil moisture content;
ii) Soil pH;
iii) Soil sulfide level;
iv) Soil resistivity;
v) Structure to soil potential;
vi) Influence of nearby underground metal
structures (e.g., piping);
vii)
Existence of stray electric current;
viii) Existing corrosion-protection measures
(e.g., coating, cathodic protection, etc.); and
B) The type and degree of external corrosion
protection that are needed to ensure the integrity of the tank system during
the use of the tank system or component, consisting of one or more of the
following:
i) Corrosion-resistant materials
of construction, such as special alloys, fiberglass reinforced plastic,
etc.;
ii) Corrosion-resistant
coating, such as epoxy, fiberglass, etc., with cathodic protection (e.g.,
impressed current or sacrificial anodes); and
iii) Electrical isolation devices, such as
insulating joints, flanges, etc.
BOARD NOTE: The practices described in the National
Association of Corrosion Engineers (NACE) standard, "Control of External
Corrosion on Metallic Buried, Partially Buried, or Submerged Liquid Storage
Systems", NACE Recommended Practice RP0285, and "Cathodic Protection of
Underground Petroleum Storage Tanks and Piping Systems", API Recommended
Practice 1632, each incorporated by reference in 35 Ill. Adm. Code
720.111(a),
may be used, where applicable, as guidelines in providing corrosion protection
for tank systems.
4) For underground tank system components
that are likely to be adversely affected by vehicular traffic, a determination
of design or operational measures that will protect the tank system against
potential damage; and
5) Design
considerations to ensure the following:
A)
That tank foundations will maintain the load of a full tank;
B) That tank systems will be anchored to
prevent flotation or dislodgment where the tank system is placed in a saturated
zone, or is located within a seismic fault zone subject to the standards of
Section
724.118(a);
and
C) That tank systems will
withstand the effects of frost heave.
b) The owner or operator of a new tank system
must ensure that proper handling procedures are adhered to in order to prevent
damage to the system during installation. Prior to covering, enclosing or
placing a new tank system or component in use, an independent qualified
installation inspector or a qualified Professional Engineer, either of whom is
trained and experienced in the proper installation of tank systems or
components, must inspect the system for the presence of any of the following
items:
1) Weld breaks;
2) Punctures;
3) Scrapes of protective coatings;
4) Cracks;
5) Corrosion;
6) Other structural damage or inadequate
construction or installation. All discrepancies must be remedied before the
tank system is covered, enclosed, or placed in use.
c) New tank systems or components that are
placed underground and which are backfilled must be provided with a backfill
material that is a noncorrosive, porous, and homogeneous substance which is
installed so that the backfill is placed completely around the tank and
compacted to ensure that the tank and piping are fully and uniformly
supported.
d) All new tanks and
ancillary equipment must be tested for tightness prior to being covered,
enclosed or placed in use. If a tank system is found not to be tight, all
repairs necessary to remedy the leaks in the system must be performed prior to
the tank system being covered, enclosed, or placed into use.
e) Ancillary equipment must be supported and
protected against physical damage and excessive stress due to settlement,
vibration, expansion, or contraction.
BOARD NOTE: The piping system installation procedures
described in "Installation of Underground Petroleum Storage Systems", API
Recommended Practice 1615, or "Chemical Plant and Petroleum Refinery Piping",
ASME/ANSI Standard B31.3 -1987, as supplemented by B31.3a-1988 and B31.3b-1988,
and "Liquid Petroleum Transportation Piping Systems for Hydrocarbons, Liquid
Petroleum Gas, Anhydrous Ammonia, and Alcohols", ASME/ANSI Standard B31.4
-1986, as supplemented by B31.4a-1987, each incorporated by reference in 35
Ill. Adm. Code
720.111(a),
may be used where applicable, as guidelines for proper installation of piping
systems.
f) The owner or
operator must provide the type and degree of corrosion protection recommended
by an independent corrosion expert, based on the information provided under
subsection (a)(3), or other corrosion protection if the Agency determines that
other corrosion protection is necessary to ensure the integrity of the tank
system during use of the tank system. The installation of a corrosion
protection system that is field fabricated must be supervised by an independent
corrosion expert to ensure proper installation.
g) The owner or operator must obtain and keep
on file at the facility written statements by those persons required to certify
the design of the tank system and supervise the installation of the tank system
in accordance with the requirements of subsections (b) through (f), that attest
that the tank system was properly designed and installed and that repairs,
pursuant to subsections (b) and (d), were performed. These written statements
must also include the certification statement, as required in 35 Ill. Adm. Code
702.126(d).
